 Patent Application Title |
Patent App Num. |
Date |
| Oximeter ambient light cancellation | 20130123593 | 20130516 |
 A pulse oximeter method and apparatus which provides (1) a notch filter at a distance between a modulation frequency and a common multiple of commonly used power line frequencies (50, 60, 100 and 120) and also (2) a demodulation frequency greater than a highest pulse rate of a person and lower than any harmonic of 50, 60, 100 or 120 Hz, to filter ambient light interference, while choosing an optimum demodulation frequency that avoids interference from the notch filter or from harmonics of the line interference. Also, ambient light for any low frequency interference, such as power line interference, is measured both before and after each of the light emitter wavelengths and the average of the ambient light is then subtracted from the detected signal.
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| Method and system for sleep disturbance analysis | 20130096404 | 20130418 |
 A system for automatic sleep test analysis, the system comprising: a pulse oximeter for continuously monitoring oxygen saturation values of a patient; a capnograph for continuously monitoring exhaled carbon dioxide (C02) values of the patient; and a computing unit configured to compute a continuous integrated sleep score based on a sequential analysis of the oxygen saturation values and the exhaled C02 values, wherein the continuous integrated sleep score is indicative of the patient's breathing-related sleep quality during at least a portion of the sleep test.
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| System and method for automatic detection of a plurality of spo2 time series pattern types | 20130060110 | 20130307 |
 The disclosed embodiments relate to pulse oximetry. An exemplary pulse oximeter comprises a probe that is adapted to be attached to a body part of a patient to create a signal indicative of an oxygen saturation of blood of the patient, and a processor that is adapted to receive the signal produced by the probe, to calculate an SPO2 value based on the signal, to detect a plurality of pattern types of SPO2 indicative of pathophysiologic events, and to produce an output indicative of a detected one of the plurality of pattern types.
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| Method of analyzing and processing signals | 20130046156 | 20130221 |
 A physiological measurement system is disclosed which can take a pulse oximetry signal such as a photoplethysmogram from a patient and then analyse the signal to measure physiological parameters including respiration, pulse, oxygen saturation and movement. The system comprises a pulse oximeter which includes a light emitting device and a photodetector attachable to a subject to obtain a pulse oximetry signal; analogue to digital converter means arranged to convert said pulse oximetry signal into a digital pulse oximetry signal; signal processing means suitable to receive said digital pulse oximetry signal and arranged to decompose that signal by wavelet transform means; feature extraction means arranged to derive physiological information from the decomposed signal; an analyser component arranged to collect information from the feature extraction means; and data... |
| Method of analyzing and processing signals | 20130046157 | 20130221 |
 A physiological measurement system is disclosed which can take a pulse oximetry signal such as a photoplethysmogram from a patient and then analyse the signal to measure physiological parameters including respiration, pulse, oxygen saturation and movement. The system comprises a pulse oximeter which includes a light emitting device and a photodetector attachable to a subject to obtain a pulse oximetry signal; analogue to digital converter means arranged to convert said pulse oximetry signal into a digital pulse oximetry signal; signal processing means suitable to receive said digital pulse oximetry signal and arranged to decompose that signal by wavelet transform means; feature extraction means arranged to derive physiological information from the decomposed signal; an analyser component arranged to collect information from the feature extraction means; and data... |
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| Method of analyzing and processing signals | 20130046160 | 20130221 |
| A physiological measurement system is disclosed which can take a pulse oximetry signal such as a photoplethysmogram from a patient and then analyse the signal to measure physiological parameters including respiration, pulse, oxygen saturation and movement. The system comprises a pulse oximeter which includes a light emitting device and a photodetector attachable to a subject to obtain a pulse oximetry signal; analogue to digital converter means arranged to convert said pulse oximetry signal into a digital pulse oximetry signal; signal processing means suitable to receive said digital pulse oximetry signal and arranged to decompose that signal by wavelet transform means; feature extraction means arranged to derive physiological information from the decomposed signal; an analyser component arranged to collect information from the feature extraction means; and data... |
| Method of analyzing and processing signals | 20130046161 | 20130221 |
| A physiological measurement system is disclosed which can take a pulse oximetry signal such as a photoplethysmogram from a patient and then analyse the signal to measure physiological parameters including respiration, pulse, oxygen saturation and movement. The system comprises a pulse oximeter which includes a light emitting device and a photodetector attachable to a subject to obtain a pulse oximetry signal; analogue to digital converter means arranged to convert said pulse oximetry signal into a digital pulse oximetry signal; signal processing means suitable to receive said digital pulse oximetry signal and arranged to decompose that signal by wavelet transform means; feature extraction means arranged to derive physiological information from the decomposed signal; an analyser component arranged to collect information from the feature extraction means; and data... |
| Method of analyzing and processing signals | 20130046184 | 20130221 |
| A physiological measurement system is disclosed which can take a pulse oximetry signal such as a photoplethysmogram from a patient and then analyse the signal to measure physiological parameters including respiration, pulse, oxygen saturation and movement. The system comprises a pulse oximeter which includes a light emitting device and a photodetector attachable to a subject to obtain a pulse oximetry signal; analogue to digital converter means arranged to convert said pulse oximetry signal into a digital pulse oximetry signal; signal processing means suitable to receive said digital pulse oximetry signal and arranged to decompose that signal by wavelet transform means; feature extraction means arranged to derive physiological information from the decomposed signal; an analyser component arranged to collect information from the feature extraction means; and data... |
| Method of analyzing and processing signals | 20130046185 | 20130221 |
| A physiological measurement system is disclosed which can take a pulse oximetry signal such as a photoplethysmogram from a patient and then analyse the signal to measure physiological parameters including respiration, pulse, oxygen saturation and movement. The system comprises a pulse oximeter which includes a light emitting device and a photodetector attachable to a subject to obtain a pulse oximetry signal; analogue to digital converter means arranged to convert said pulse oximetry signal into a digital pulse oximetry signal; signal processing means suitable to receive said digital pulse oximetry signal and arranged to decompose that signal by wavelet transform means; feature extraction means arranged to derive physiological information from the decomposed signal; an analyser component arranged to collect information from the feature extraction means; and data... |
| Method of analyzing and processing signals | 20130046186 | 20130221 |
| A physiological measurement system is disclosed which can take a pulse oximetry signal such as a photoplethysmogram from a patient and then analyse the signal to measure physiological parameters including respiration, pulse, oxygen saturation and movement. The system comprises a pulse oximeter which includes a light emitting device and a photodetector attachable to a subject to obtain a pulse oximetry signal; analogue to digital converter means arranged to convert said pulse oximetry signal into a digital pulse oximetry signal; signal processing means suitable to receive said digital pulse oximetry signal and arranged to decompose that signal by wavelet transform means; feature extraction means arranged to derive physiological information from the decomposed signal; an analyser component arranged to collect information from the feature extraction means; and data... |
| Method of analyzing and processing signals | 20130046187 | 20130221 |
| A physiological measurement system is disclosed which can take a pulse oximetry signal such as a photoplethysmogram from a patient and then analyse the signal to measure physiological parameters including respiration, pulse, oxygen saturation and movement. The system comprises a pulse oximeter which includes a light emitting device and a photodetector attachable to a subject to obtain a pulse oximetry signal; analogue to digital converter means arranged to convert said pulse oximetry signal into a digital pulse oximetry signal; signal processing means suitable to receive said digital pulse oximetry signal and arranged to decompose that signal by wavelet transform means; feature extraction means arranged to derive physiological information from the decomposed signal; an analyser component arranged to collect information from the feature extraction means; and data... |
| Method of analyzing and processing signals | 20130046188 | 20130221 |
| A physiological measurement system is disclosed which can take a pulse oximetry signal such as a photoplethysmogram from a patient and then analyze the signal to measure physiological parameters including respiration, pulse, oxygen saturation and movement. The system comprises a pulse oximeter which includes a light emitting device and a photodetector attachable to a subject to obtain a pulse oximetry signal; analogue to digital converter means arranged to convert said pulse oximetry signal into a digital pulse oximetry signal; signal processing means suitable to receive said digital pulse oximetry signal and arranged to decompose that signal by wavelet transform means; feature extraction means arranged to derive physiological information from the decomposed signal; an analyzer component arranged to collect information from the feature extraction means; and data... |
| Intermitted hypoxic training facility and method for animals | 20130000561 | 20130103 |
| A hypoxic training facility includes a plurality of walls defining an enclosure for housing an animal to be trained. A hypoxicator is adapted for delivering hypoxic, hyperoxic, and normoxic air to the enclosure during a hypoxic training session. An animal exercise station is located within the enclosure. A pulse oximeter monitors oxygen saturation of the animal's blood during the hypoxic training session. A computing device calculates hypoxic stress delivered to the animal during the hypoxic training session.
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| Cardiopulmonary resuscitation monitoring apparatus | 20120245442 | 20120927 |
| A cardiopulmonary resuscitation monitoring apparatus includes: a detecting unit configured to obtain a detection signal of a timing of chest compression during execution of cardiopulmonary resuscitation; a pulse oximeter configured to detect a change of a blood volume at the timing of the chest compression based on the detection signal, and configured to obtain an oxygen saturation from the change of the blood volume; an evaluating unit configured to perform evaluation related to the cardiopulmonary resuscitation based on the oxygen saturation; and an outputting unit configured to perform an outputting operation in accordance with a result of the evaluation.
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| Minimizing ambient light in a feedback circuit in pulse oximeter test instruments | 20120228470 | 20120913 |
| Generally described, one or more embodiments of the present disclosure are directed to pulse oximeter test instruments for testing pulse oximeters. The pulse oximeter test instruments are configured to linearize a relationship between an input signal and an output signal of a light emitting diode (LED). In some embodiments, the linearized relationship may be obtained by minimizing an amount of ambient light detected by a photosensor in a feedback loop. The photosensor may be located in a housing that limits the amount of ambient light that may be detected.
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| Pulse oximeter test instruments and methods | 20120229800 | 20120913 |
| Generally described, one or more embodiments of the present disclosure are directed to pulse oximeter test instruments and methods for testing pulse oximeters. The pulse oximeter test instruments may be configured to sense light at different wavelengths simultaneously. In some embodiments, light pulses having a wavelength above a particular threshold may be detected and used to test measurements made by a pulse oximeter. In that regard, the pulse oximeter test instruments disclosed herein are able to provide improved accuracy and more reliable test results over prior art pulse oximeter test instruments.
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| Reusable pulse oximeter probe and disposable bandage apparatii | 20120220842 | 20120830 |
| A disposable portion of an optical probe is usable to determine at least one physiological parameter. The disposable portion comprises a bandage including adhesive on at least a portion of at least one face thereof. The bandage comprises a first receptacle at a first position. The first receptacle is configured to receive and removably engage a probe emitter. The bandage comprises a second receptacle at a second position. The second position is spaced from the first position. The second receptacle is configured to receive and removably engage a probe detector. The first receptacle at the first position is positioned generally opposite the second receptacle at the second position when the bandage is positioned on an appendage of a patient for sensing a physiological parameter of the... |
| Systems and methods for monitoring and processing biometric data | 20120172679 | 20120705 |
| Methods and systems for monitoring biometric and/or environmental data of a user are provided. The user monitoring system includes a dental appliance configured to fit substantially inside a mouth of a user, a pulse oximeter for measuring user oxygen saturation level, a pressure sensor for measuring pressure exerted by the user and a processor for acquiring and processing oxygen saturation and pressure data of the user. The user monitoring system may communicate with an observer monitoring system. In some embodiments, the user monitoring system also measures one or more of ambient air temperature, light levels, respiration rate and environmental hazards.
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| Biological signal measuring apparatus and biological signal measuring method | 20120130211 | 20120524 |
| A biological signal measuring apparatus includes: a light emitter which emits at least two light beams having different wavelengths to living tissue of a subject; a light receiver which receives the light beams that are emitted from the light emitter, and which converts at least one of the light beams to at least one electric signal that corresponds to a reception light intensity of the at least one of the light beams; a detector which detects temporal variation of the reception light intensity from the electric signal; a selector which selects a pulse oximeter mode in which at least one of an oxygen saturation and a pulse rate is calculated and a capillary refilling time measurement mode in which a capillary refilling time is calculated; and... |
| Pulse oximeter | 20120101349 | 20120426 |
| A pulse oximeter includes a housing defined by at least a first housing portion and a second housing portion wherein the second portion includes a passage. A sensor module disposed in the housing and proximate the passage includes at least one light emitting diode and at least one photodetector. A processing module also disposed in the housing and configured to communicate with the sensor module includes at least a processor, a network interface, and a power supply. The pulse oximeter further includes a pad having at least a bottom surface and a pad passage, as well as an adhesive configured to be disposed on at least a portion of the bottom surface of the pad. The housing is configured to releasably engage the pad wherein the... |
| Method for reducing power consumption in pulse oximeter systems, pulse oximeter system and pulse oximeter sensor | 20120053432 | 20120301 |
| Method and pulse oximeter system for determining blood characteristics of a subject are disclosed. A pulse oximeter sensor for collecting plethysmographic data is also disclosed. In order to reduce the power consumption, time instants of systolic rises are estimated in at least one plethysmographic waveform of a subject and light emitting elements of a sensor are controlled according to the estimated time instants, thereby to collect signal samples from a plurality of plethysmographic waveforms of the subject during the systolic rises. A desired blood parameter, typically oxygen saturation, is then defined based on the signal samples collected during the systolic rises.
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| Foot pulse oximeter for screening congenital heart disease before newborn discharge | 20120046532 | 20120223 |
| A method including placing a portion of a foot of a newborn in a device, the device including a light emitter and a corresponding receiver coupled on opposite sides of the device, the device further including a processor for processing data from the light emitter and receiver; and determining a presence of congenital heart disease. An apparatus including a body including a chamber of a size to accommodate a portion of a newborn's foot; at least one light emitter and a corresponding detector coupled on opposite sides of the body, the emitter configured to emit light of a prescribed wavelength into the chamber; and a processor coupled to the body and configured to receive a signal from the at least one detector.
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| Sensor fusion and probabilistic parameter estimation method and apparatus | 20120022350 | 20120126 |
| A probabilistic digital signal processor using data from multiple instruments is described. Initial probability distribution functions are input to a dynamic state-space model, which operates on state and/or model probability distribution functions to generate a prior probability distribution function, which is input to a probabilistic updater. The probabilistic updater integrates sensor data from multiple instruments with the prior to generate a posterior probability distribution function passed (1) to a probabilistic sampler, which estimates one or more parameters using the posterior, which is output or re-sampled in an iterative algorithm or (2) iteratively to the dynamic state-space model. For example, the probabilistic processor operates on fused data using a physical model, where the data originates from a mechanical system or a medical meter or instrument, such as... |
| Medical devices and techniques for rodent and small mammalian based research | 20120022351 | 20120126 |
| A method and system of supplying rodents, such as mice, to medical researchers pre-installs and/or embeds physiologic sensors onto or within the rodents prior to selling the modified rodents to the researchers. The specialty skills, such as small animal surgical and anesthesia skills and sensor placement and testing, are centralized in one organization rather than being spread about a collection of researchers. The subjects with preinstalled, pre-tested hardware, are sold to the researcher as needed. Communication hardware and software will be supplied for the user to convert their desktop computer into a wireless monitoring station. Additionally an external pulse oximeter for small rodents, such as mice, provides measurements on a hand or foot of the rodent with a sensor configured to avoid shunting around the rodent... |
| Pulse oximeter | 20120016219 | 20120119 |
| The present invention provides a pulse oximeter of the portable type, which is possible to carry around and to use widely regardless of the adult, the infant, the newborn baby, and which can keep the finger still for performing the precise measurement. The pulse oximeter 100 comprises a measurement cavity 110 for accepting the examined portion (for example finger) of the subject, a measurement device 120 including a light emitting part 121 and a photo detecting part 122 facing between the measurement cavity 110, a filling element 140 formed from a material that the light used for the measurement can penetrate. The height and the curvature of the inner surface of the filling element 140 is larger than that of the outer surface of the filling... |
| Blood pressure monitor and pulse oximeter system for animal research | 20120004517 | 20120105 |
| An integrated blood pressure monitor and pulse oximeter system includes a blood flow occlusion member configured to selectively occlude blood flow through an appendage of the animal (e.g., the neck or tail); a sensor coupled to the blood flow occlusion member detecting a degree of operation thereof; Light sources coupled to the tail closer to the distal end of the tail than the tail blood flow occlusion member, and selectively directing light of two different wavelengths into the appendage; a light receiver coupled to the appendage and selectively receiving a signal associated with light directed into the appendage from the light sources; and a controller configured to selectively determine blood pressure parameters from the data and pulse oximeter parameters from the data.
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| Forehead sensor placement | 20110009723 | 20110113 |
| Forehead oximetry sensor devices and methods for determining physiological parameters using forehead oximetry sensors. One method includes placing an oximetry sensor on the forehead of a patient, such that the sensor is placed on the lower forehead region, above the eyebrow with the sensor optics placed lateral of the iris and proximal the temple; and operating the pulse oximeter to obtain the physiological parameter. In one aspect, the method also includes providing and placing a headband over the oximetry sensor, or alternately, the sensor is a headband-integrated sensor. The headband has an elastic segment sized to fit around the patient's head. The headband also includes a non-elastic segment that is smaller than and attached with the elastic segment. The non-elastic segment is sized to span a... |
| Reflectance and/or transmissive pulse oximeter | 20100331638 | 20101230 |
| According to various embodiments, a medical sensor assembly may be configured to switch between transmission and reflectance mode. Such sensors may include multiple optical sensing components that may be activated or silent, depending on the mode in use. A practitioner may switch between modes based on the particular situation of the patient or based on the signal quality.
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| Body-worn pulse oximeter | 20100324389 | 20101223 |
| The invention provides a body-worn system that continuously measures pulse oximetry and blood pressure, along with motion, posture, and activity level, from an ambulatory patient. The system features an oximetry probe that comfortably clips to the base of the patient's thumb, thereby freeing up their fingers for conventional activities in a hospital, such as reading and eating. The probe secures to the thumb and measures time-dependent signals corresponding to LEDs operating near 660 and 905 nm. Analog versions of these signals pass through a low-profile cable to a wrist-worn transceiver that encloses a processing unit. Also within the wrist-worn transceiver is an accelerometer, a wireless system that sends information through a network to a remote receiver, e.g. a computer located in a central nursing station.
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| Body-worn pulse oximeter | 20100324388 | 20101223 |
| The invention provides a body-worn system that continuously measures pulse oximetry and blood pressure, along with motion, posture, and activity level, from an ambulatory patient. The system features an oximetry probe that comfortably clips to the base of the patient's thumb, thereby freeing up their fingers for conventional activities in a hospital, such as reading and eating. The probe secures to the thumb and measures time-dependent signals corresponding to LEDs operating near 660 and 905 nm. Analog versions of these signals pass through a low-profile cable to a wrist-worn transceiver that encloses a processing unit. Also within the wrist-worn transceiver is an accelerometer, a wireless system that sends information through a network to a remote receiver, e.g. a computer located in a central nursing station.
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| Body-worn pulse oximeter | 20100324387 | 20101223 |
| The invention provides a body-worn system that continuously measures pulse oximetry and blood pressure, along with motion, posture, and activity level, from an ambulatory patient. The system features an oximetry probe that comfortably clips to the base of the patient's thumb, thereby freeing up their fingers for conventional activities in a hospital, such as reading and eating. The probe secures to the thumb and measures time-dependent signals corresponding to LEDs operating near 660 and 905 nm. Analog versions of these signals pass through a low-profile cable to a wrist-worn transceiver that encloses a processing unit. Also within the wrist-worn transceiver is an accelerometer, a wireless system that sends information through a network to a remote receiver, e.g. a computer located in a central nursing station.
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| Body-worn pulse oximeter | 20100324386 | 20101223 |
| The invention provides a body-worn system that continuously measures pulse oximetry and blood pressure, along with motion, posture, and activity level, from an ambulatory patient. The system features an oximetry probe that comfortably clips to the base of the patient's thumb, thereby freeing up their fingers for conventional activities in a hospital, such as reading and eating. The probe secures to the thumb and measures time-dependent signals corresponding to LEDs operating near 660 and 905 nm. Analog versions of these signals pass through a low-profile cable to a wrist-worn transceiver that encloses a processing unit. Also within the wrist-worn transceiver is an accelerometer, a wireless system that sends information through a network to a remote receiver, e.g. a computer located in a central nursing station.
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| Body-worn pulse oximeter | 20100324385 | 20101223 |
| The invention provides a body-worn system that continuously measures pulse oximetry and blood pressure, along with motion, posture, and activity level, from an ambulatory patient. The system features an oximetry probe that comfortably clips to the base of the patient's thumb, thereby freeing up their fingers for conventional activities in a hospital, such as reading and eating. The probe secures to the thumb and measures time-dependent signals corresponding to LEDs operating near 660 and 905 nm. Analog versions of these signals pass through a low-profile cable to a wrist-worn transceiver that encloses a processing unit. Also within the wrist-worn transceiver is an accelerometer, a wireless system that sends information through a network to a remote receiver, e.g. a computer located in a central nursing station.
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| Body-worn pulse oximeter | 20100324384 | 20101223 |
| The invention provides a body-worn system that continuously measures pulse oximetry and blood pressure, along with motion, posture, and activity level, from an ambulatory patient. The system features an oximetry probe that comfortably clips to the base of the patient's thumb, thereby freeing up their fingers for conventional activities in a hospital, such as reading and eating. The probe secures to the thumb and measures time-dependent signals corresponding to LEDs operating near 660 and 905 nm. Analog versions of these signals pass through a low-profile cable to a wrist-worn transceiver that encloses a processing unit. Also within the wrist-worn transceiver is an accelerometer, a wireless system that sends information through a network to a remote receiver, e.g. a computer located in a central nursing station.
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| Method and apparatus for detecting and analyzing variations in a physiologic parameter | 20100292548 | 20101118 |
| The present disclosure is generally directed to identifying and/or analyzing high resolution variations in a measured physiologic parameter, such as blood oxygen saturation (SpO2) measured using pulse oximetry. Present embodiments may include a system including a sensor comprising an emitter capable of emitting light at different wavelengths into a tissue bed, and a detector capable of detecting the light from the emitter after dispersion and/or reflection by the tissue bed. Further, the system may include a pulse oximeter capable of receiving signals from the sensor that are indicative of characteristics of the light detected by the detector, and utilizing the signals to estimate blood oxygen saturation values over time at a high resolution to facilitate detection of variations in the blood oxygen saturation values that are... |
| Novel methods and devices for noninvasive measurement of energy absorbers in blood | 20100286515 | 20101111 |
| Various embodiments of the present invention include devices for use in determining the concentration of a tissue energy absorber (e.g., hemoglobin) in an individual's blood. In particular embodiments, the device includes a photometric device (e.g., a pulse oximeter) and an imaging device (e.g., an ultrasound imaging device or other suitable imaging device), and the device is adapted for: (A) using the photometric device to measure a change in mass of the tissue energy absorber within a particular volume of the individual's blood between a first point in time and a second point in time, the particular volume of blood being blood within a particular portion of at least one vascular structure, the vascular structure comprising at least one of the individual's vessels (e.g., at least one... |
| Processing physiological sensor data using a physiological model combined with a probabilistic processor | 20100274102 | 20101028 |
| A pulse oximeter system comprises a data processor configured to perform a method that combines a sigma point Kalman filter (SPKF) or sequential Monte Carlo (SMC) algorithm with Bayesian statistics and a mathematical model comprising a cardiovascular model and a plethysmography model to remove contaminating noise and artifacts from the pulse oximeter sensor output and measure blood oxygen saturation, heart rate, left-ventricular stroke volume, aortic pressure and systemic pressures.
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| System and method for wirelessly powering medical devices | 20100249552 | 20100930 |
| A system and method for the wirelessly charging of a power source of a pulse oximeter. The pulse oximeter may include an inductively coupled conductor. The inductively coupled conductor may be coupled to the power source and the inductively coupled conductor may wirelessly receive an electromagnetic charging signal. Based on the received signal, the inductively coupled conductor may at least partially recharge the power source.
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| Slider spot check pulse oximeter | 20100240972 | 20100923 |
| A slider spot check pulse oximeter may include a first portion and a second portion. The first portion may include a sensor configured to monitor physiological parameters of a patient. The second portion may include a display configured to display the monitored physiological parameters. The second portion may be configured to slide relative to the first portion such that the second portion substantially exposes the sensor when in an open position and substantially covers the sensor when in a closed position.
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| Pulse oximeter with changeable structure | 20100210928 | 20100819 |
| A pulse oximeter with changeable structure includes a first housing, having a light emitting element and a light receiving element mounted therein, and a second housing, electrically connected to the first housing, wherein the circuit needed by the pulse oximeter is distributed into the first and the second housings, and a corresponding pair of assembling mechanisms are further mounted on the first and the second housings, respectively, so that the first and the second housings are capable of being assembled together to form one single combination.
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| Methods and devices for central photoplethysmographic monitoring methods | 20100192952 | 20100805 |
| Disclosed herein are methods and devices for delivering gas to a subject and obtaining plethysmograph readings from a subject. Specifically disclosed herein are masks and helmets which comprise one or more pulse oximeter probes associated therewith. The masks and helmets may be used in particular contexts, including, but not limited to, emergency responder personnel, pilots or subjects of medical attention.
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| Small animal pulse oximeter user interface | 20100145170 | 20100610 |
| A user interface for a pulse oximetry device that calculates physiologic parameters of a subject including at least a subject's heart rate and SpO2, is disclosed wherein the interface comprises a graphical display of at least one raw data signal of the pulse oximetry device that maintains heart and breath rate components and a display of the calculated heart rate and SpO2 of the subject. The interface may further include a user selectable data averaging function in which the interface is configured to selectively obtain and display averages of at least some of the calculated physiologic parameters over a defined period. The interface may further include a user selectable noise suppression function for the displayed data.
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| Pulse oximeter sensor with piece-wise function | 20100113903 | 20100506 |
| A memory in a sensor is used to store multiple coefficients for a physiological parameter. In one embodiment, not only are the sensor's specific calibration coefficients stored in a memory in the sensor for the formula to determine oxygen saturation, but multiple sets of coefficients are stored. The multiple sets apply to different ranges of saturation values to provide a better fit to occur by breaking the R to SpO2 relationship up into different pieces, each described by a different function. The different functions can also be according to different formulas for determining oxygen saturation.
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| Peripheral oxistimulator apparatus and methods | 20100099963 | 20100422 |
| Apparatus and methods for monitoring a patient's blood oxygen content (through, e.g., an external finger probe using a pulse oximeter). If the patient's blood oxygen content falls below a selected level, a safe, yet effective, level of peripheral nerve stimulation would be delivered to the patient's wrist in the form of a milliamp current to arouse the patient.
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| Systems, methods, and/or apparatuses for non-invasive monitoring of respiratory parameters in sleep disordered breathing | 20100016694 | 20100121 |
| In certain example embodiments, an air delivery system includes a controllable flow generator operable to generate a supply of pressurized breathable gas to be provided to a patient for treatment and a pulse oximeter. In certain example embodiments, the pulse oximeter is configured to determine, for example, a measure of patient effort during a treatment period and provide a patient effort signal for input to control operation of the flow generator. Oximeter plethysmogram data may be used, for example, to determine estimated breath phase; sleep structure information; autonomic improvement in response to therapy; information relating to relative breathing effort, breathing frequency, and/or breathing phase; vasoconstrictive response, etc. Such data may be useful in diagnostic systems.
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| Signal processing systems and methods using multiple signals | 20100014723 | 20100121 |
| According to embodiments, techniques for signal processing using multiple signals are disclosed. A first scalogram may be generated from a first signal and a second scalogram may be generated from a second signal. A modified or masked scalogram may then be generated based on the first and second scalograms. The modified scalogram may then be used to determine at least one physiological parameter. In some embodiments, one or both of the first signal and the second signal may be photoplethysmograph (PPG) signals obtained from a pulse oximeter.
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| Synchronous light detection utilizing cmos/ccd sensors for oximetry sensing | 20090326347 | 20091231 |
| This disclosure describes a system and method for measuring a physiological parameter, such as a SpO2 measurement, generated by a monitoring device having a plurality of sensors. Embodiment described herein disclose a monitoring device, such as a pulse oximeter having an array of sensor elements and an oxygen saturation module configured to calculate an estimated value of oxygen saturation of a patient's blood. This calculation is based on information received from the array of sensor elements.
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| Pulse oximeter with wait-time indication | 20090326335 | 20091231 |
| The present disclosure provides a system and method for determination and indication of the time remaining before a patient's physical characteristics are displayed on a monitor. The indication may be a numeric count-down, a progress bar, a clock face, an audible signal, or any other time and/or progress indication. The approximate wait-time may be determined, for example, by adding the known, generally fixed durations of characteristic determination processes to the calculated, variable durations of characteristic determination processes. Exemplary processes which may have generally fixed durations include monitor boot-up, sensor validation, and sensor calibration. Exemplary processes which may have variable durations include sensor location determination and pulsation detection. The sum of the pre-determined and calculated durations may be an approximate wait-time, which is indicated to a caregiver... |
| Pulse oximetry and pulse oximeter | 20090318787 | 20091224 |
| A pulse oximetry includes: irradiating living tissue with a plurality of light beams of different wavelengths; receiving the light beams transmitted through or reflected from the living tissue and converting the received light beams to electric signals which correspond to the different wavelengths; time-segmenting time series data of the electric signals; calculating, with respect to each of the segmented time series data of the electric signals, a slope value of a regression line between each two of the electric signals; calculating SaO2 based on the slope value of each of the segmented time series data of the electric signals; constructing a histogram of SaO2 for each predetermined number of time segments; and obtaining a mode value from the histogram as SpO2 to be output of the... |
| Apparatus and method for measuring a characteristic of a composition reactive to a magnetic field | 20090306489 | 20091210 |
| A system that incorporates teachings of the present disclosure may include, for example, a sensor having a pulse oximeter sensor to measure an oxygen saturation level in a liquid, a magnetic source coupled to the pulse oximeter sensor, and a controller to control the pulse oximeter sensor and the magnetic source, and to measure a mechanical effect on the liquid responsive to the magnetic source applying a magnetic field to the liquid. Additional embodiments are disclosed.
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| Portable patient monitor | 20090306488 | 20091210 |
| Embodiments of the present disclosure includes a portable pulse oximeter, such as a handheld pulse oximeter, that provides a user with intuitive key navigation for device operation, which reduces an amount of visual concentration needed to handle and operate the oximeter. In various embodiments, the portable pulse oximeter includes one or more of user input keys disposed along curve, an alignment edge providing guidance by feel of a user's digits to the input keys, raised convex keys also providing navigation by feel, a protective boot disposed around various portions of the oximeter housing to protect against impacts, a table-top stand, combinations of the same, or the like.
... |
| Pulse oximeter with reduced cross talk effects | 20090247846 | 20091001 |
| A method of reducing the effect of cross talk in a pulse oximeter is disclosed herein. The method includes: setting an initial pulse width and pulse rate for an LED drive signal and measuring a cross talk generated within the pulse oximeter. Based on the measured cross talk, the pulse width of the LED drive signal is minimized. The pulse width is minimized based on a relationship between the cross talk and a threshold level.
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| Reducing nuisance alarms | 20090247848 | 20091001 |
| Embodiments disclosed herein may describe systems and methods for reducing nuisance alarms using probability and/or accuracy of a measured physiological parameter, such as the pulse rate or SpO2 measurement generated by a pulse oximeter. Embodiments may include methods for adjusting a predetermined alarm threshold based on the probability distribution of the estimated pulse rate and/or oxygen saturation of a patient's blood.
... |
| Pulse oximeter with adaptive power conservation | 20090247849 | 20091001 |
| Embodiments disclosed herein may include systems and methods for reducing power consumption of a pulse oximeter. The disclosure describes method for measuring oxygen saturation of a patient's blood with a pulse oximeter that switches between a high power mode of operation and one or more low power modes of operation based at least in part upon the data obtained from the patient or otherwise generated by the pulse oximeter. In one embodiment, the disclosure describes a operating a pulse oximeter in a high power mode, the pulse oximeter using a sensor to generate data indicative of the oxygen saturation of the patient's blood at a first resolution and switching the pulse oximeter to a low power mode upon detection of data indicative of a non-critical situation.... |
| Manually powered oximeter | 20090247850 | 20091001 |
| Embodiments disclosed herein may include a medical device and a method for powering a medical device are disclosed. The medical device may be able to operate independent of a plug-in and a wall socket as a power source by way of a manual power source. Additionally, shock resistant components are described which may protect the medical device from damage typically encountered during manually powering and using the pulse oximeter in areas where traditional power sources such as a wall outlet are unavailable.
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| Retractable sensor cable for a pulse oximeter | 20090247854 | 20091001 |
| Provided is a method and apparatus for storing of a sensor cable used with a medical device. The medical device may include a retraction device that is activated by depressing a lever. Once the lever is depressed, the sensor cable may automatically wind itself around a spool inside of the medical device. Additionally, an automatic stop feature prevents a sensor cable from retracting without depression of the lever, thus maintaining the exact length of cable required to connect a monitor to the monitoring site on a patient. The retraction of the sensor cable may allow for storage of the cable in the monitor itself, or may allow for storage of the cable into the retraction device, which may be detachable from the monitor.
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| Pulse oximeter with alternate heart-rate determination | 20090221889 | 20090903 |
| A pulse oximeter which determines multiple heart rates, and selects between them based on the metrics of only one of the heart rate calculations. A primary heart rate calculation method is selected, and is used unless its metrics indicate questionable accuracy, in which case an alternative rate calculation is available and is used instead.
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| Led drive circuit and method for using same | 20090167205 | 20090702 |
| In various embodiments, there is provided an LED drive circuit and a method for using the same. Specifically, the present disclosure is directed to an LED drive circuit for pulse oximeters. In an embodiment, the LED drive circuit includes a current mirror configured to provide drive current to an LED of a sensor. Additionally, the method includes providing current to first and second current mirrors, wherein the first and second current mirrors are configured to control first and second light sources.
... |
| Ultra-low-power pulse oximeter implemented with an energy-efficient photoreceptor | 20090163784 | 20090625 |
| An energy-efficient photoreceptor apparatus and a transimpedance amplifier apparatus having high energy-efficiency and low power consumption of which are achieved through multiple distributed gain amplification stages, adaptive loop gain control circuitry and unilateralization, thereby enabling fast and precise performance over a wide range of input-current levels. The high-energy efficiency, robust feedback stability and performance of the present invention can be utilized to achieve sub-milliwatt pulse oximeters and may be employed in other current-to-voltage amplification and conversion applications. The use of analog processing on the outputs of the photoreceptor apparatus also helps lower the overall power of pulse oximeters.
... |
| Ultra-low-power pulse oximeter implemented with an energy-efficient photoreceptor | 20090163784 | 20090625 |
| An energy-efficient photoreceptor apparatus and a transimpedance amplifier apparatus having high energy-efficiency and low power consumption of which are achieved through multiple distributed gain amplification stages, adaptive loop gain control circuitry and unilateralization, thereby enabling fast and precise performance over a wide range of input-current levels. The high-energy efficiency, robust feedback stability and performance of the present invention can be utilized to achieve sub-milliwatt pulse oximeters and may be employed in other current-to-voltage amplification and conversion applications. The use of analog processing on the outputs of the photoreceptor apparatus also helps lower the overall power of pulse oximeters.
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| Pulse oximeter access apparatus and method | 20090137885 | 20090528 |
| Access is provided to certain pulse oximetry systems utilizing a keyed sensor and a corresponding locked sensor port of a restricted access monitor. In such systems, the keyed sensor has a key comprising a memory element, and the monitor has a memory reader associated with the sensor port. The monitor is configured to function only when the key is in communications with the locked sensor port, and the memory reader is able to retrieve predetermined data from the memory element. The monitor is accessed by providing the key separate from the keyed sensor, integrating the key into an adapter cable, and connecting the adapter cable between the sensor port and an unkeyed sensor so that the monitor functions with the unkeyed sensor.
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| Single use pulse oximeter | 20090131774 | 20090521 |
| A single use, self-contained, self-powered disposable oximeter, in the form of a patch or a bandage strip, has mounted thereto a light emitter and a light sensor that together measure at least the SpO2 of the patient. Mounted to an electronics layer of the patch is an application specific integrated circuit (ASIC) that has electronics integrated thereto that controls the operation of the light emitter and light sensor, and the algorithm for calculating from the data collected by the sensor at least the SpO2 of the patient. Optionally, a display and an alarm may also be mounted or embedded onto the patch for respectively displaying at least the SpO2, and for informing the caregiver/patient that at least the SpO2 is not within an acceptable range, if... |
| Pulse oximeter probe-off detector | 20090112073 | 20090430 |
| A processor provides signal quality based limits to a signal strength operating region of a pulse oximeter. These limits are superimposed on the typical gain dependent signal strength limits. If a sensor signal appears physiologically generated, the pulse oximeter is allowed to operate with minimal signal strength, maximizing low perfusion performance. If a sensor signal is potentially due to a signal induced by a dislodged sensor, signal strength requirements are raised. Thus, signal quality limitations enhance probe off detection without significantly impacting low perfusion performance. One signal quality measure used is pulse rate density, which defines the percentage of time physiologically acceptable pulses are occurring. If the detected signal contains a significant percentage of unacceptable pulses, the minimum required signal strength is raised proportionately. Another signal... |
| Integrated tail mounted blood pressure monitor and pulse oximeter system for animal research | 20090099425 | 20090416 |
| An integrated tail mounted blood pressure monitor and pulse oximeter system includes a tail blood flow occlusion member configured to selectively occlude blood flow through the tail; a sensor coupled to the tail blood flow occlusion member detecting a degree of operation thereof; Light sources coupled to the tail closer to the distal end of the tail than the tail blood flow occlusion member, and selectively directing light of two different wavelengths into the tail; a light receiver coupled to the tail and selectively receiving a signal associated with light directed into the tail from the light sources; and a controller configured to selectively determine blood pressure parameters from the data and pulse oximeter parameters from the data.
... |
| Selection of ensemble averaging weights for a pulse oximeter based on signal quality metrics | 20090082651 | 20090326 |
| A method and a system for ensemble averaging signals in a pulse oximeter, including receiving first and second electromagnetic radiation signals from a blood perfused tissue portion corresponding to two different wavelengths of light, obtaining an assessment of the signal quality of the electromagnetic signals, selecting weights for an ensemble averager using the assessment of signal quality, and ensemble averaging the electromagnetic signals using the ensemble averager.
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| Compensation of human variability in pulse oximetry | 20090076354 | 20090319 |
| The invention relates to a method of calibrating a pulse oximeter, in which the effects caused by tissue of a subject can be taken into account. A detector output signal is measured when living tissue of the subject is present between emitters and the detector in a sensor. Nominal calibration and nominal calibration characteristics are read from a memory, whereupon values for the same nominal characteristics for the sensor on living tissue of the subject are established using the detector output signal. Then, changes in the nominal calibration characteristics induced by the living tissue are calculated and a subject-specific calibration is formed by correcting the nominal calibration with the changes. Finally, the hemoglobin fractions are solved using the corrected nominal calibration. The invention also relates to... |
| Systems and methods for determining physiological parameters using measured analyte values | 20090043171 | 20090212 |
| Systems and methods for determining a physiological parameter in a patient are provided. In certain embodiments, a system can include an analyte detection system configured to measure first analyte data in a fluid sample received from a patient, a medical sensor configured to measure second analyte data in the patient, and a processor configured to receive the first analyte data and the second analyte data and to determine a physiological parameter based at least in part on the first analyte data and the second analyte data. In certain such embodiments, the medical sensor may be a pulse oximeter, and the physiological parameter may include a cardiovascular parameter including, for example, cardiac output.
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| Pulse oximeter | 20090036762 | 20090205 |
| In a pulse oximeter of the invention, an arterial blood oxygen saturation at least at a walking end point of time is stored in a storage, in response to a detection result from a detector for detecting whether a subject is walking. With use of the pulse oximeter, a measurement result on arterial blood oxygen saturation in association with walking can be automatically obtained, without the accompaniment of a laboratory technician or a like support.
... |
| Non-invasive determination of the concentration of a blood substance | 20090024011 | 20090122 |
| In order to provide a non-invasive and continuous concentration measurement with the technology of standard pulse oximeters, an a priori relationship is created, through an in-vivo tissue model including a nominal estimate of a tissue parameter indicative of the concentration of a blood substance. The a priori relationship is indicative of the effect of tissue on in-vivo measurement signals at a plurality of wavelengths, the in-vivo measurement signals being indicative of absorption caused by pulsed arterial blood. In-vivo measurement signals are acquired from in-vivo tissue at the plurality of wavelengths and a specific value of the tissue parameter is determined based on the a priori relationship, the specific value being such that it yields the effect of the in-vivo tissue on the in-vivo measurement signals consistent... |
| Oximeter ambient light cancellation | 20090005662 | 20090101 |
| A pulse oximeter method and apparatus which provides (1) a notch filter at a distance between a modulation frequency and a common multiple of commonly used power line frequencies (50, 60, 100 and 120) and also (2) a demodulation frequency greater than a highest pulse rate of a person and lower than any harmonic of 50, 60, 100 or 120 Hz, to filter ambient light interference, while choosing an optimum demodulation frequency that avoids interference from the notch filter or from harmonics of the line interference. Also, ambient light for any low frequency interference, such as power line interference, is measured both before and after each of the light emitter wavelengths and the average of the ambient light is then subtracted from the detected signal.
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| Pulse oximetry relational alarm system for early recognition of instability and catastrophic occurrences | 20080287756 | 20081120 |
| A relational pulse oximetry alarm system and method is presented for earlier identification of the occurrence of an adverse clinical event. The system includes a pulse oximeter based microprocessor alarm system which provides an alarm based on a relational conformation of a plurality of time series and further based on the recognition of specific dynamic patterns of interaction between a plurality of corresponding and related time series including the occurrence of pathophysiologic divergence of two or more time series outputs. The processor is programmed to compare a first time series to a second time series to produce a comparison result, to identify a relationship between the first time series and the second time series, to identify a relational threshold breach, and to output an alarm based... |
| Illuminator probe with memory device and method | 20080287758 | 20081120 |
| An improved medical illuminator (103) with memory chip (241). The memory element retains information useful in the operation of the illuminator, such as probe identification, probe serial number, use history, calibration details, or other information. Further, the illuminator with information chip can be incorporated into a medical probe or device, such as a pulse oximeter system or probe, as well as to be used in surgical devices or other equipment that require illumination. A method of use is also provided.
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| Device and method for sleep apnea management using spo2 | 20080269832 | 20081030 |
| The present invention relates to an anti-sleep apnea device including two electrodes and a pulse oximeter, adapted to be disposed on the user's wrist for releasing electrical pulses to an acupoint of the user, and a method of monitoring and treating sleep-apnea, whereby monitoring occurs via a pulse oximeter and treatment occurs by providing electrical stimulation to specific acupoint on the user.
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| Pulse oximetry grip sensor and method of making same | 20080262328 | 20081023 |
| A probe for use with a pulse oximeter apparatus is disclosed, as are a fixture for and a method of making the probe. The probe includes a housing and two fiber optic bundles. The first bundle has an emitter portion at one end, and is used for conducting light from a source thereof to the emitter portion from which the light is transmitted for transillumination through a body part. The second bundle is for conducting the transilluminated light incident upon a detector portion thereof to the pulse oximeter apparatus. The housing is overmolded onto the bundles so that the emitter and detector portions are securely positioned diametrically opposite each other across an opening defined by the housing. The overmolding makes the alignment of the emitter and... |
| Multifunction health apparatus | 20080221404 | 20080911 |
| The present invention provides a multifunction health device, which comprises a meter and a platform. The meter has two electrodes arranged separately at its two sides or both arranged at its one side, and the meter has another electrode arranged in its bottom. The platform has four electrodes arranged in its top face, and a pressure sensor arranged in its inside. With or without some parts assisting, the single use of the meter can function as an ECG detector, a TENS machine, a thermometer, and a first sphygmomanometer. Connecting with the platform, the meter and the platform can function as an ECG detector, a weight scale, and a body composition estimator. Further, the meter can alternatively connect with a chassis thus functioning as a second sphygmomanometer,... |
| Small animal pulse oximeter user interface | 20080194932 | 20080814 |
| A user interface for a pulse oximetry device that calculates physiologic parameters of a subject including at least a subject's heart rate and SpO2, is disclosed wherein the interface comprises a graphical display of at least one raw data signal of the pulse oximetry device that maintains heart and breath rate components and a display of the calculated heart rate and SpO2 of the subject. The interface may further include a user selectable data averaging function in which the interface is configured to selectively obtain and display averages of at least some of the calculated physiologic parameters over a defined period.
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| Display, data storage and alarm features of an adaptive oxygen controller | 20080183057 | 20080731 |
| A bar graph display feature for clinical viewing of supplemental oxygen (SpO2) or blood oxygen percentage, Pulse Rate, and Fraction of Inspired Oxygen (FiO2) levels as derived from an adaptive supplemental oxygen controller is described. A bar graph is a moving histogram of SpO2, Pulse Rate, and FiO2 by using a computer that calculates a FiO2 by using SpO2 feedback. The bar graph displays stored data on a flat screen or LCD over specified periods. Other display features include alarm conditions: 1) Upper FiO2 Limit, 2) Motion Detection, 3) Power Loss, 4) Battery Backup, and 5) Pressure Loss. The Upper FiO2 Limit is a calculation of FiO2 by using SpO2 feedback from a pulse oximeter. The invention also relates to an adaptive oxygen control system whereas... |
| Small animal restraining device with physiologic sensor mount | 20080168951 | 20080717 |
| A restraining tube for small animals (preferably animals with tails) is designed to facilitate physiologic measurements of the animal through an integrated or associated sensor mount. The physiologic sensors include those for the measurement of pulse oximetry and other measurements such as breath rate, heart rate, pulse distention and breath distention, temperature to name a few. A tail engaging sensor mount geometry is provided for a particular pulse oximeter into the back plate of the tube. The immobility of the animal is especially important given the fact that pulse oximetry measurements are extremely susceptible to even the smallest motion artifact.
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| Interference suppression in spectral plethysmography | 20080167541 | 20080710 |
| The invention relates to a patient monitoring device, especially to a pulse oximeter. For suppressing the effects of an interference source causing adverse modulation in one or more blood related signals input to the device, a power spectrum is derived for each blood related signal and the frequency of an interference source causing unwanted modulation in the blood related signal(s) is identified. A weight function is determined, in which the relative weight of at least one frequency is dampened, the at least one frequency depending on the identified frequency. The weight function is applied to the power spectrum(s), thereby to obtain at least one weighted power spectrum. A blood related parameter of the subject is defined based on the at least one weighted power spectrum.
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| Techniques for accurately deriving physiologic parameters of a subject from photoplethysmographic measurements | 20080167564 | 20080710 |
| Several techniques are disclosed for isolating either heart or breath rate data from a photoplethysmograph, which is a time domain signal such as from a pulse oximeter. The techniques involve the use of filtering in the frequency domain, after a Fast Fourier Transform (FFT) has been conducted on a given photoplethysmograph also references as a given set of discrete time-domain data. The filtering may be applied to an identified fundamental frequency and one or more harmonics for heart related parameters. The filter may be truncated to the frequency data set and further applied multiple times to improve roll off. After filtering, an Inverse FFT (IFFT) is used to reconstruct the time-domain signal, except with undesirable frequency content eliminated or reduced. Calculation or measurement of parameters is... |
| Apparatus for monitoring physiological, activity, and environmental data | 20080154098 | 20080626 |
| The invention relates to an earpiece form factor including technology to monitor physiological, activity and environmental data on a user. The device includes a pulse oximeter unit to provide blood oxygenation level and beat-to-beat timing, a three-axis accelerometer to provide orientation and activity level, and a temperature sensor to provide a subject's skin temperature. The device may also capture other forms of data for the user and the user's surroundings. Captured data are transmitted wirelessly to a mobile phone, PDA or other device that supports wireless transmission, and enables monitoring form another location.
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| Hand and digit immobilizer for pulse oximeter | 20080119700 | 20080522 |
| A hand and digit immobilizer is disclosed for preventing a patient from dislodging a pulse oximeter finger sensor by finger movement or fist clenching. In one form, the hand and digit immobilizer includes a glove body having a palm section and a back section defining a proximal opening for receiving a person's hand. The glove body has four finger base openings for receiving the fingers of the hand and has a thumb base opening for receiving the thumb. A finger covering section is connected to and extends away from each finger base opening. At least one finger covering section having a distal finger opening at its distal end. A rigid plate is secured to the palm section of the glove body and a palm side of... |
| Method and apparatus for automated vascular function testing | 20080119741 | 20080522 |
| A method and system for use in measuring the endothelial dysfunction utilizing flow mediated dilation and determining arterial health of a patient. The system includes a non-invasive blood pressure monitor, an ultrasound system and a pulse oximeter monitor that all communicate with each other to perform the flow mediated dilation. Initially, the ultrasound transducer, blood pressure cuff and pulse oximeter sensor are positioned on an arm of the patient. The blood pressure cuff is inflated to occlude an artery for an occlusion period. Following the occlusion period, the ultrasound system is automatically signaled to begin determining a parameter of the artery, such as diameter, and the flow rate of blood through the artery without any operator intervention. At the same time, the pulse wave velocity PWV... |
| Multifunction health apparatus | 20080114221 | 20080515 |
| The present invention provides a multifunction health device, which comprises a meter and a platform. The meter has two electrodes arranged separately at its two sides, and another electrode arranged in its bottom. The platform has four electrodes arranged in its top face, and a pressure sensor arranged in its inside. With or without some parts assisting, the single use of the meter can function as an ECG detector, a TENS machine, a thermometer, and a first sphygmomanometer. Connecting with the platform, the meter and the platform can function as an ECG detector, a weight scale, and a body composition estimator. Further, the meter can alternatively connect with a chassis thus functioning as a second sphygmomanometer, a stethoscope, a glucose meter, or a pulse oximeter.
... |
| System and method for user interface and identification in a medical device | 20080097177 | 20080424 |
| There are provided systems and methods for user interface and identification in a medical device. More specifically, in one embodiment, there is provided a pulse oximeter comprising a main unit configured to perform a medical function, and a display coupled to the main unit, the display configured to detect external contact by a stylus with a screen of the display, determine a location on the screen of the contact, wherein the location of the contact corresponds to a command for the medical device, and transmit the command corresponding to the location to the main unit.
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| Variable mode pulse indicator | 20080091092 | 20080417 |
| A user configurable variable mode pulse indicator provides a user the ability to influence outputs indicative of a pulse occurrence at least during distortion, or high-noise events. For example, when configured to provide or trigger pulse indication outputs, a pulse indicator designates the occurrence of each pulse in a pulse oximeter-derived photo-plethysmograph waveform, through waveform analysis or some statistical measure of the pulse rate, such as an averaged pulse rate. When the configured to block outputs or not trigger pulse indication outputs, a pulse indicator disables the output for one or more of an audio or visual pulse occurrence indication. The outputs can be used to initiate an audible tone “beep” or a visual pulse indication on a display, such as a vertical spike on a... |
| Subcutaneous cardiac sensing and stimulation system employing blood sensor | 20080091242 | 20080417 |
| Cardiac systems and methods using ECG and blood information for arrhythmia detection and discrimination. Detection circuitry is configured to produce an ECG. An implantable blood sensor configured to produce a blood sensor signal is coupled to a processor. The processor is coupled to the detection and energy delivery circuitry, and used to evaluate and treat cardiac rhythms using both the cardiac electrophysiologic and blood sensor signals. The blood sensor is configured for subcutaneous non-intrathoracic placement and provided in or on the housing, on a lead coupled to the housing, and/or separate to the housing and coupled to the processor via hardwire or wireless link. The blood sensor may be configured for optical sensing, using a blood oxygen saturation sensor or pulse oximeter. A cardiac rhythm may... |
| Cable monitoring apparatus | 20080081954 | 20080403 |
| A cable monitoring apparatus includes a housing having an input interface adapted to electrically connect to one end of a medical cable and an output interface adapted to electrically connect to an electrical system. Signal processing circuitry is incorporated within the housing for receiving a medical signal from the medical cable via the input interface and for selectively passing the medical signal to the electrical system via the output interface when in a first mode of operation, and has application software for selectively testing functionality of the medical cable when in a second mode of operation. The medical signal may include at least one monitoring signal selected from a group consisting of fetal and maternal medical signals. Preferably, the at least one monitoring signal is generated... |
| Symmetric led array for pulse oximetry | 20080081966 | 20080403 |
| A sensor for pulse oximeter systems is provided which comprises a first source of electromagnetic radiation configured to operate at a first wavelength, a second source of electromagnetic radiation configured to operate at a second wavelength and a third source of electromagnetic radiation configured to operate at a third wavelength. The first and third sources of electromagnetic radiation are symmetrically oriented about an axis.
... |
| Symmetric led array for pulse oximetry | 20080081972 | 20080403 |
| There is provided a sensor for pulse oximeter systems. The sensor comprises a first source of electromagnetic radiation configured to operate at a first wavelength, a second source of electromagnetic radiation configured to operate at a second wavelength, and a third source of electromagnetic radiation configured to operate at a third wavelength. The emission spectra of the first and third sources of electromagnetic radiation overlap at their half power level or greater and correspond to a center wavelength in the range of 650 to 670 nm.
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| Pathological condition detector using kernel methods and oximeters | 20080081974 | 20080403 |
| A method of manufacturing a pulse oximeter configured to classify patient data is disclosed. The method includes collecting a set of sample data and classifying the sample data as either pathological or normal using human expertise. The method also includes generating statistics representative of the saturation traces. A linear discriminator is composed having a non-linear transform that accepts the statistics as input and a pulse oximeter is programmed to compute the linear discriminator using a kernel function.
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| Pulse oximeter based techniques for controlling anesthesia levels and ventilation levels in subjects | 20080072906 | 20080327 |
| Medical devices and techniques derive breath rate, breath distention, and pulse distention measurements of a subject from a pulse oximeter system coupled to the subject. These parameters together with the conventional physiologic parameters obtained from a pulse oximeter system can be used to assist in controlling the ventilation levels and the anesthesia levels of the subject. The development has human applications and particular application for animal research.
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| Oxygen concentration control apparatus for incubator, and incubator using the same | 20080076962 | 20080327 |
| The present invention provides an oxygen concentration control apparatus for an incubator and an incubator using the same also suitable for continuous use for a long period. A pulse oximeter measures percutaneous arterial oxygen saturation (SpO2) of a newborn accommodated in an incubator, and a control unit obtains fraction of inspired oxygen (FiO2) used for setting the measured value of the percutaneous arterial oxygen saturation (SpO2) obtained by the pulse oximeter to a predetermined set value. In the measurement of the percutaneous arterial oxygen saturation (SpO2) by the pulse oximeter, it is unnecessary to warm the skin of a region to be measured. Consequently, even if the percutaneous arterial oxygen saturation (SpO2) is measured continuously for a long period, there is low possibility that the accommodated... |
| Medical display devices for cardiac and breathing parameters derived from extra-thoracic blood flow measurements | 20080076991 | 20080327 |
| Medical devices and techniques derive breath rate, breath distention, and pulse distention measurements of a subject from a pulse oximeter system coupled to the subject. These parameters together with the conventional physiologic parameters obtained from a pulse oximeter system can be used to assist in controlling the ventilation levels and the anesthesia levels of the subject. The development has human applications and particular applications for animal research.
... |
| Pulse oximetry system and techniques for deriving cardiac and breathing parameters from extra-thoracic blood flow measurements | 20080076992 | 20080327 |
| Medical devices and techniques derive breath rate, breath distention, and pulse distention measurements of a subject from a pulse oximeter system coupled to a subject. These parameters, together with the conventional physiologic parameters obtained from a pulse oximeter system, can be used to assist in controlling the ventilation levels and the anesthesia levels of the subject. The development has human applications and particular applications for animal research.
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| Simplified ecg monitoring system | 20080077027 | 20080327 |
| A simplified device and method for continuous ECG monitoring incorporates electrodes in a pulse oximeter finger probe and/or in a blood pressure cuff. The electrodes in the pulse oximeter and blood pressure cuff generate a continuous ECG tracing without the use of disposable electrodes connected to multiple electrical wires in an ECG harness. In another embodiment, simplified ECG monitoring system can act as a secondary ECG input to a system that uses a primary ECG input as well.
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| Method and apparatus for non-invasive monitoring of respiratory parameters in sleep disordered breathing | 20080066753 | 20080320 |
| An air delivery system includes a controllable flow generator operable to generate a supply of pressurized breathable gas to be provided to a patient for treatment and a pulse oximeter configured to determine a measure of patient effort during a treatment period and provide a patient effort signal for input to control operation of the flow generator.
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| Method for performing a non-invasive blood gas test | 20080064112 | 20080313 |
| A non-invasive blood gas test is carried out by a method that utilizes a venous blood sample together with a pulse oximeter and a plurality of mathematical equations. The method generates the following data points of the blood: (i) the pH level; (ii) the [H+] concentration; (iii) the [HCO3—] concentration; (iv) the partial pressure of carbon dioxide; and (v) the oxygen saturation level. Mathematical formulas, tables, and chemical equations provide a simple method by which a doctor or other medical professional can easily calculate the blood gas data without the need for an arterial blood sample or specialized machines. Blood gas measurements are obtained from a patient in a faster, safer and less painful manner than tests that require an arterial blood sample. In another embodiment... |
| Low power pulse oximeter | 20080064936 | 20080313 |
| A pulse oximeter may reduce power consumption in the absence of overriding conditions. Various sampling mechanisms may be used individually or in combination. Various parameters may be monitored to trigger or override a reduced power consumption state. In this manner, a pulse oximeter can lower power consumption without sacrificing performance during, for example, high noise conditions or oxygen desaturations.
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| Devices and methods for measuring pulsus paradoxus | 20080064965 | 20080313 |
| The invention relates to methods and devices for measuring pulsus paradoxus. The methods herein employ a combination of one or more forms of waveform analysis for the purpose of measuring pulsus paradoxus and diagnosing respiratory distress. The methods also combine measurements of pulsus paradoxus and physician assessments to diagnose respiratory distress. The methods also combine measurements of pulsus paradoxus and percentage oxygenated hemoglobin to diagnose respiratory distress. The devices of this invention employ pulse oximeters, arterial tonometers, finometers, or processors for the purpose of implementing the methods of the invention.
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| Two-tier model to screen patients with sleep-disordered breathing | 20070265506 | 20071115 |
| A two tier model for screening patients with sleep-disordered breathing includes collecting clinical information of a number of patients are collected, including gender, age, and body mass index, and performing form surveys including the Epworth Sleepiness Scale and the Snore Outcomes Survey to obtain a respiratory disturbance index (RDI). Receiver operating characteristics (ROC) are calculated with an initial strategy to maximize prediction sensitivity for patients with obstructive sleep apnea syndrome(OSAS). The associations between pulse oximeter data (desaturation index of 3%, DI3) against RDI was the second strategy to maximize prediction specificity.
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| Pulse oximeter sleeve | 20070244377 | 20071018 |
| A pulse oximeter sleeve of elastic and/or form-fitting material for positioning light-emitting diodes and a detector securely with respect to a human's foot or hand.
... |
| Method for performing a non-invasive blood gas test | 20070218559 | 20070920 |
| A non-invasive blood gas test is carried out by a method that utilizes a venous blood sample together with a pulse oximeter and a plurality of mathematical equations. The method generates the following data points of the blood: (i) the pH level; (ii) the [H+] concentration; (iii) the [HCO3—] concentration; (iv) the partial pressure of carbon dioxide; and (v) the oxygen saturation level. Mathematical formulas, tables, and chemical equations provide a simple method by which a doctor or other medical professional can easily calculate the blood gas data without the need for an arterial blood sample or specialized machines. Blood gas measurements are obtained from a patient in a faster, safer and less painful manner than tests that require an arterial blood sample. In another embodiment... |
| Systems and methods for noninvasively monitoring baroreflex response and nominal blood volume | 20070213619 | 20070913 |
| Systems and methods for noninvasively monitoring baroreflex response and nominal blood volume are disclosed herein. Software and methods for evaluating morphological features of a photoplethysmogram (PPG) obtained using a pulse oximeter allow for the affirmative detection and quantification of the baroreflex response from data obtained during orthostatic stress tests, lower body negative pressure chamber tests and treadmill stress tests.
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| Selection of ensemble averaging weights for a pulse oximeter based on signal quality metrics | 20070208242 | 20070906 |
| A method and a system for ensemble averaging signals in a pulse oximeter, including receiving first and second electromagnetic radiation signals from a blood perfused tissue portion corresponding to two different wavelengths of light, obtaining an assessment of the signal quality of the electromagnetic signals, selecting weights for an ensemble averager using the assessment of signal quality, and ensemble averaging the electromagnetic signals using the ensemble averager.
... |
| System and method for detection of unstable oxygen saturation | 20070179369 | 20070802 |
| Methods and systems are described for simplified detection of unstable oxygen saturation of a patient by analysis of statistical variations in blood oxygen. One method for automatic detection of unstable oxygen saturation of a patient using a pulse oximeter comprises receiving at least a single time series input of oxygen saturation values and computing at least two metrics based on statistical properties of the single time series input of the oxygen saturation values.
... |
| Pulse oximeter and sensor optimized for low saturation | 20070156039 | 20070705 |
| A pulse oximeter sensor with a light source optimized for low oxygen saturation ranges and for maximizing the immunity to perturbation induced artifact. Preferably, a red and an infrared light source are used, with the red light source having a mean wavelength between 700-790 nm. The infrared light source can have a mean wavelength as in prior art devices used on patients with high saturation. The sensor of the present invention is further optimized by arranging the spacing between the light emitter and light detectors to minimize the sensitivity to perturbation induced artifact. The present invention optimizes the chosen wavelengths to achieve a closer matching of the absorption and scattering coefficient products for the red and IR light sources. This optimization gives robust readings in the... |
| Monitoring device for multiple tissue sites | 20070149864 | 20070628 |
| The invention relates to a patient monitoring device, especially to a pulse oximeter, provided with multiple sensors for performing simultaneous measurements at multiple tissue sites. In order to reduce the hardware required by the measurement, a repeating drive pulse sequence is generated, which contains drive pulses for the emitter elements of the plurality of sensors. Furthermore, each drive pulse of the sequence is supplied to a corresponding emitter element and sensor-specific detectors connected in parallel are employed to produce an electric reception signal received at the monitoring device.
... |
| Patient monitoring device with multiple sensors | 20070149865 | 20070628 |
| The invention relates to a patient measurement device, especially to a pulse oximeter, provided with multiple sensors. In order to reduce the hardware required by a measurement performed through the multiple sensors, a repeating drive pulse sequence is generated, which contains drive pulses for the emitter elements of the plurality of sensors. Furthermore, each drive pulse of the sequence is supplied to a corresponding emitter element and sensor-specific detectors connected in parallel are employed to produce an electric reception signal received at the measurement device.
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| Multi-bit adc with sigma-delta modulation | 20070132618 | 20070614 |
| There is provided a pulse oximeter circuit including a feedback circuit configured to receive a digital output signal of a multi-bit sigma-delta modulator and generate a pulse width modulated signal (PWM). The PWM signal is directed to a first switching circuit and a D flip-flop. The first switching circuit provides a first or second reference voltage as a feedback signal to the multi-bit sigma-delta modulator. The D flip-flop generates a sample and hold signal. The sample and hold signal controls a second switching circuit coupled to the input of the multi-bit sigma-delta modulator.
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| Single use pulse oximeter | 20070100218 | 20070503 |
| A single use, self-contained, self-powered disposable oximeter, in the form of a patch or a bandage strip, has mounted thereto a light emitter and a light sensor that together measure at least the SpO2 of the patient. Mounted to an electronics layer of the patch is an application specific integrated circuit (ASIC) that has electronics integrated thereto that controls the operation of the light emitter and light sensor, and the algorithm for calculating from the data collected by the sensor at least the SpO2 of the patient. Optionally, a display and an alarm may also be mounted or embedded onto the patch for respectively displaying at least the SpO2, and for informing the caregiver/patient that at least the SpO2 is not within an acceptable range, if... |
| Single use pulse oximeter | 20070100219 | 20070503 |
| A single use, self-contained, self-powered disposable oximeter, in the form of a patch or a bandage strip, has mounted thereto a light emitter and a light sensor that together measure at least the SpO2 of the patient. Mounted to an electronics layer of the patch is an application specific integrated circuit (ASIC) that has electronics integrated thereto that controls the operation of the light emitter and light sensor, and the algorithm for calculating from the data collected by the sensor at least the SpO2 of the patient. Optionally, a display and an alarm may also be mounted or embedded onto the patch for respectively displaying at least the SpO2, and for informing the caregiver/patient that at least the SpO2 is not within an acceptable range, if... |
| Wireless network connected pulse oximeter | 20070073119 | 20070329 |
| A wireless network connected pulse oximetry system and method of providing pulse oximetry data obtained by a pulse oximeter to a monitoring station that is remote from a patient monitored by the pulse oximeter are provided. In one embodiment, a wireless network connected pulse oximetry system (100) includes a pulse oximeter (110) having an optical data transmitter (112) such as an infra-red LED and associated LED drive circuitry). The system (110) also includes a computer (140) that is interconnectable with a global data network (104) (e.g., the Internet) and an optical data receiver (130) that is connectable with a data port (144) of the computer via a data cable (142). The optical data receiver (130) is operable to receive optically transmitted pulse oximetry data (102) from... |
| Time-segmented pulse oximetry and pulse oximeter performing the same | 20070049812 | 20070301 |
| In order to measure an oxygen saturation in blood of a subject, a living tissue of the subject is irradiated with a first light beam having a first wavelength and a second light beam having a second wavelength different from the first wavelength. A first electrical signal is generated from the first light beam reflected from or transmitted through the living tissue. A second electrical signal is generated from the second light beam reflected from or transmitted through the living tissue. The first electrical signal is divided into a plurality of first segments each of which includes a part of the first electrical signal for a predetermined time period. The second electrical signal is divided into a plurality of second segments each of which includes a... |
| Method and circuit for storing and providing historical physiological data | 20070043269 | 20070222 |
| Embodiments of the present invention relate to pulse oximeter systems and methods. Specifically, one embodiment includes an oximeter system including an oximeter sensor comprising a light emitting element configured to emit light having a wavelength, a light detector configured to receive the light, and a memory storing signal quality data that facilitates determining a quality of signals sent from the light emitting element to the light detector via the light. Further, the oximeter system may comprise an oximeter monitor, comprising a receiving circuit configured to receive the signal quality data from the oximeter sensor, and a processor configured to use the signal quality data to calculate an optical transmissivity of a material for the wavelength.
... |
| Optimized gas supply using photoplethysmography | 20070027375 | 20070201 |
| The present invention relates to optimized gas supply utilizing photoplethysmography. Flow rate, pressure or amount of gas is adjusted as a function of blood oxygen saturation data, photoplethysmography signals, or both, obtained from the pulse oximeter probe.
... |
| Probe adapted to be used with pulse oximeter | 20070027376 | 20070201 |
| A probe adapted to be used with a pulse oximeter is disclosed. A flexible first housing is adapted to be brought into contact with at least a nail of a finger or a toe of a subject. A flexible second housing is adapted to be brought into contact with at least a top of the finger or the toe. A flexible connecting part connects the first housing and the second housing, and is adapted to cover a tip end of the nail. A light emitting element is provided on one of the first housing and the second housing. A light receiving element is provided on the other one of the first housing and the second housing.
... |
| Shunt barrier in pulse oximeter sensor | 20070027377 | 20070201 |
| A pulse oximeter sensor comprising an emitter and a detector disposed on a substrate layer with a thinned portion between the emitter and the detector. A partially transparent covering layer covers the substrate layer and comprises a corresponding thinned portion. The thinned portions attenuate light shunted via the substrate layer and the partially transparent covering layer from the emitter to the detector, and may be configured such that less than 10% of the light detectable by the detector is shunted light.
... |
| Shunt barrier in pulse oximeter sensor | 20070027378 | 20070201 |
| A pulse oximeter sensor comprising an emitter and a detector disposed on a substrate layer with a thinned portion between the emitter and the detector. A partially transparent covering layer covers the substrate layer and comprises a corresponding thinned portion. The thinned portions attenuate light shunted via the substrate layer and the partially transparent covering layer from the emitter to the detector, and may be configured such that less than 10% of the light detectable by the detector is shunted light.
... |
| Shunt barrier in pulse oximeter sensor | 20070027379 | 20070201 |
| A pulse oximeter sensor comprising an emitter and a detector disposed on a substrate layer with a thinned portion between the emitter and the detector. A partially transparent covering layer covers the substrate layer and comprises a corresponding thinned portion. The thinned portions attenuate light shunted via the substrate layer and the partially transparent covering layer from the emitter to the detector, and may be configured such that less than 10% of the light detectable by the detector is shunted light.
... |
| Shunt barrier in pulse oximeter sensor | 20070027380 | 20070201 |
| A pulse oximeter sensor comprising an emitter and a detector disposed on a substrate layer with a thinned portion between the emitter and the detector. A partially transparent covering layer covers the substrate layer and comprises a corresponding thinned portion. The thinned portions attenuate light shunted via the substrate layer and the partially transparent covering layer from the emitter to the detector, and may be configured such that less than 10% of the light detectable by the detector is shunted light.
... |
| Shunt barrier in pulse oximeter sensor | 20070021659 | 20070125 |
| A pulse oximeter sensor comprising a light emitter and a detector disposed on a substrate layer with a plurality of perforations or variations in thickness between the light emitter and the detector. The plurality of perforations or variations in thickness blocks or scatters light shunted via the substrate layer from the light emitter to the detector, and may be configured such that less than 10% of the light detectable by the detector is shunted light.
... |
| Shunt barrier in pulse oximeter sensor | 20070021660 | 20070125 |
| A pulse oximeter sensor comprising an emitter and a detector disposed on a substrate layer with a thinned portion between the emitter and the detector. A partially transparent covering layer covers the substrate layer and comprises a corresponding thinned portion. The thinned portions attenuate light shunted via the substrate layer and the partially transparent covering layer from the emitter to the detector, and may be configured such that less than 10% of the light detectable by the detector is shunted light.
... |
| Shunt barrier in pulse oximeter sensor | 20070021661 | 20070125 |
| A pulse oximeter sensor comprising an emitter and a detector coupled to a substrate layer and a partially opaque layer located on a patient contact side of the sensor and covering the emitter. The partially opaque layer is configured to attenuate light shunted via the partially opaque layer from the emitter to the detector, and may be configured such that less than 10% of the light detected by the detector is shunted light.
... |
| Shunt barrier in pulse oximeter sensor | 20070021662 | 20070125 |
| A pulse oximeter sensor comprising an emitter and a detector disposed on a substrate layer with a thinned portion between the emitter and the detector. A partially transparent covering layer covers the substrate layer and comprises a corresponding thinned portion. The thinned portions attenuate light shunted via the substrate layer and the partially transparent covering layer from the emitter to the detector, and may be configured such that less than 10% of the light detectable by the detector is shunted light.
... |
| Shunt barrier in pulse oximeter sensor | 20070021663 | 20070125 |
| A pulse oximeter sensor comprising an emitter and a detector disposed on a substrate layer with a thinned portion between the emitter and the detector. A partially transparent covering layer covers the substrate layer and comprises a corresponding thinned portion. The thinned portions attenuate light shunted via the substrate layer and the partially transparent covering layer from the emitter to the detector, and may be configured such that less than 10% of the light detectable by the detector is shunted light.
... |
| Shunt barrier in pulse oximeter sensor | 20070015982 | 20070118 |
| A pulse oximeter sensor having an emitter(s) and a detector, with a layer having a first portion of the emitter and a second portion of layer over the detector is provided. A barrier is included between the first and second portions of the overlying layer to substantially block radiation of the wavelengths emitted by the emitter(s). Preferably, the barrier reduces the radiation shunted to less than 10% of the radiation detected, and more preferably to less than 1% of the radiation detected.
... |
| Separating oximeter signal components based on color | 20060293574 | 20061228 |
| A component of interest of an oximeter detector signal is distinguished from an interfering component based on a color difference between the components. The component of interest may be a pulsatile signal component, a baseline signal component such as a respiratory signal, or an artifact signal. The color difference between the component of interest and the interfering component is reflected in corresponding mixing ratios with respect to multiple optical channels of the pulse oximeter. The component of interest is separated from the interfering component by mathematical decomposition using the mixing ratios. In this manner, signal components can be isolated substantially free from frequency dependent filtering.
... |
| System for prefiltering a plethysmographic signal | 20060293575 | 20061228 |
| A detector signal in a pulse oximeter is prefiltered, prior to processing so as to determine a physiological parameter value, so as to reduce the effects of artifact in the signal. An exemplary prefilter multiplies signal amplitude values by a quantitude that is inversely proportional to a substantially current amplitude so as to reduce the amplitude of large amplitude sections typically associated with artifact. In one implementation, the quantity is a ratio of an amplitude associated with a clean section of the signal by some exponential factor of a substantially current amplitude. In this manner, artifact affected portions of the signal are deemphasized in subsequent analyses.
... |
| Input device for web content manager responsive to browser viewers' psychological preferences, behavioral responses and physiological stress indicators | 20060293921 | 20061228 |
| A bioelectrode input device, including a phone has control through buttons, electrodes, and sensors along its body for connection with the mastoid process, condyle, pinna (auricle), and the ear canal. The bioelectrode input device also may sensors for breath analysis, voice stress analysis, decibel analysis, galvanic skin response, body and head posture recognition monitor (a level), facial recognition device, voice signature analyzer and authentication, EMG, pulse oximeter, thermometer, electromagnetic radiant monitor, body fluid, earwax and pheromone analyzer.
... |
| Digital photoplethysmographic signal sensor | 20060287589 | 20061221 |
| A photoplethysmographic sensor and related method for use with a photoplethysmographic instrument such as a pulse oximeter are provided. In accordance with the present invention, the detector output signal from the sensor is digitized prior to communication from the sensor to the instrument and the sensor operates independent of the instrument with respect to controlling the light signal emitters of the sensor. In one embodiment, the digitized detector output signal is communicated to the instrument via a wireless communication link.
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| Forehead sensor placement | 20060281984 | 20061214 |
| Forehead oximetry sensor devices and methods for determining physiological parameters using forehead oximetry sensors. One method includes placing an oximetry sensor on the forehead of a patient, such that the sensor is placed on the lower forehead region, above the eyebrow with the sensor optics placed lateral of the iris and proximal the temple; and operating the pulse oximeter to obtain the physiological parameter. In one aspect, the method also includes providing and placing a headband over the oximetry sensor, or alternately, the sensor is a headband-integrated sensor. The headband has an elastic segment sized to fit around the patient's head. The headband also includes a non-elastic segment that is smaller than and attached with the elastic segment. The non-elastic segment is sized to span a... |
| Apparatus and method for controlling fraction of inspired oxygen | 20060266355 | 20061130 |
| A method and apparatus for operating a ventilator to control the fraction of pressure inspired oxygen (FiO2) to a patient that includes: providing a ventilator controller that includes a software algorithm, a pulse oximeter and a FiO2 flow rate controller; measuring the pulse oximetry of the patient and computing an average pulse oximetry value over a time period; selecting a first, second and third pulse oximetry levels as set points for the ventilator controller; selecting an update time interval; decreasing the FiO2 flow rate by a first incremental amount when the average pulse oximetry value is greater than the first level; increasing the FiO2 flow rate by a second incremental amount when the average pulse oximetry value is less than the second level; increasing the FiO2... |
| Oximeter ambient light cancellation | 20060264721 | 20061123 |
| A pulse oximeter method and apparatus which provides (1) a notch filter at a distance between a modulation frequency and a common multiple of commonly used power line frequencies (50, 60, 100 and 120) and also (2) a demodulation frequency greater than a highest pulse rate of a person and lower than any harmonic of 50, 60, 100 or 120 Hz, to filter ambient light interference, while choosing an optimum demodulation frequency that avoids interference from the notch filter or from harmonics of the line interference. Also, ambient light for any low frequency interference, such as power line interference, is measured both before and after each of the light emitter wavelengths and the average of the ambient light is then subtracted from the detected signal.
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| Forehead sensor placement | 20060264726 | 20061123 |
| Forehead oximetry sensor devices and methods for determining physiological parameters using forehead oximetry sensors. One method includes placing an oximetry sensor on the forehead of a patient, such that the sensor is placed on the lower forehead region, above the eyebrow with the sensor optics placed lateral of the iris and proximal the temple; and operating the pulse oximeter to obtain the physiological parameter. In one aspect, the method also includes providing and placing a headband over the oximetry sensor, or alternately, the sensor is a headband-integrated sensor. The headband has an elastic segment sized to fit around the patient's head. The headband also includes a non-elastic segment that is smaller than and attached with the elastic segment. The non-elastic segment is sized to span a... |
| Forehead sensor placement | 20060264727 | 20061123 |
| Forehead oximetry sensor devices and methods for determining physiological parameters using forehead oximetry sensors. One method includes placing an oximetry sensor on the forehead of a patient, such that the sensor is placed on the lower forehead region, above the eyebrow with the sensor optics placed lateral of the iris and proximal the temple; and operating the pulse oximeter to obtain the physiological parameter. In one aspect, the method also includes providing and placing a headband over the oximetry sensor, or alternately, the sensor is a headband-integrated sensor. The headband has an elastic segment sized to fit around the patient's head. The headband also includes a non-elastic segment that is smaller than and attached with the elastic segment. The non-elastic segment is sized to span a... |
| Method of analyzing and processing signals | 20060258921 | 20061116 |
| A physiological measurement system is disclosed which can take a pulse oximetry signal such as a photoplethysmogram from a patient and then analyse the signal to measure physiological parameters including respiration, pulse, oxygen saturation and movement The system can be used as a general monitor, or more specifically, to for infant or adult apnea, and to guard against sudden infant death syndrome. The system comprises a pulse oximeter which includes a light emitting device and a photodetector attachable to a subject to obtain a pulse oximetry signal; analogue to digital converter means arranged to convert said pulse oximetry signal into a digital pulse oximetry signal; signal processing means suitable to receive said digital pulse oximetry signal and arranged to decompose that signal by wavelet transform means;... |
| Systems and methods for acquiring calibration data usable in a pulse oximeter | 20060258926 | 20061116 |
| The present disclosure includes a pulse oximeter attachment having an accessible memory. In one embodiment, the pulse oximeter attachment stores calibration data, such as, for example, calibration data associated with a type of a sensor, a calibration curve, or the like. The calibration data is used to calculate physiological parameters of pulsing blood.
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| Light transmission simulator for pulse oximeter | 20060247507 | 20061102 |
| A living tissue light transmission simulator system (208, 308) includes receptors of light (215, 216, 315, 316) in portions of the infrared and red spectral bands and the receptors (215, 216, 315, 316), together with amplification (217, 218, 317, 318), infrared detection (239, 371), spectral separation circuitry (219, 319), and post-separation amplification (220, 221, 338, 339, 340, 320, 321), that may be used to drive at least one light source (222, 223, 322, 361). The living tissue light transmission simulator system (208, 308) includes at least one shutter (225, 235, 324, 363, 450) to mechanically modulate generated light from the at least one driven light source (222, 223, 322, 361) where the modulated light may be directed to a pulse oximeter.
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| Pulse oximeter and sensor optimized for low saturation | 20060211929 | 20060921 |
| Embodiments of the present invention relate to a pulse oximeter sensor. Specifically, embodiments of the present invention include emitting infrared light from a first light source into tissue, the infrared light including an infrared wavelength spectrum useful for measuring oxygen saturation in a patient with high saturation, emitting far red light from a second light source into the tissue, the far red light including a wavelength between 700 and 790 nanometers, and detecting the infrared light and far red light from the first and second light sources with a detector after the light has been scattered by the tissue.
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| Plethysmograph pulse recognition processor | 20060206021 | 20060914 |
| A time domain rule-based processor provides recognition of individual pulses in a pulse oximeter-derived waveform.
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| Resposable pulse oximetry sensor | 20060200018 | 20060907 |
| A pulse oximeter sensor has both a reusable and a disposable portion. The reusable portion of the sensor preserves the relatively long-lived and costly emitter, detector and connector components. The disposable portion of the sensor is the relatively inexpensive adhesive tape component that is used to secure the sensor to a measurement site, typically a patient's finger or toe. The disposable portion of the sensor is removably attached to the reusable portion in a manner that allows the disposable portion to be readily replaced when the adhesive is expended or the tape becomes soiled or excessively worn. The disposable portion may also contain an information element useful for sensor identification or for security purposes to insure patient safety.
... |
| Arrhythmia alarm processor | 20060192667 | 20060831 |
| An arrhythmia alarm processor has a pattern extractor and a predetermined reference pattern. The pattern extractor has an output responsive to short duration, intermittent oxygen desaturations of a patient as determined by a fast blood oxygen saturation processor incorporated within a pulse oximeter. The reference pattern is indicative of a series of oxygen desaturations resulting from an irregular heartbeat. An alarm is triggered when the pattern extractor output matches the predetermined reference pattern.
... |
| Pulse oximeter and sensor optimized for low saturation | 20060195026 | 20060831 |
| Embodiments of the present invention relate to a system and method for facilitating detection of a physiological characteristic of a patient. Specifically, embodiments of the present invention relate to a sensor comprising a light emitter configured to emit light, the light being optimized to reduce sensitivity of blood oxygen saturation measurements to perturbation induced artifacts for saturations less than 80 percent, wherein the light includes only spectrums in a red range and infrared range including a range of 700 to 790 nanometers, and a detector configured to detect the light.
... |
| Pulse oximeter and sensor optimized for low saturation | 20060195027 | 20060831 |
| Embodiments of the present invention relate to a pulse oximeter sensor comprising a light source configured to emit light, a detector configured to detect light after the light has been scattered by tissue, and a limiting component configured to limit light signals received at the detector from the light source to three or less spectra, wherein the three or less spectra include a first spectrum having a mean wavelength in an infrared range of 805 nanometers to 940 nanometers, and a second spectrum having a mean wavelength of 700 nanometers to 790 nanometers used in conjunction with the first spectrum for measuring oxygen saturation in a patient.
... |
| Pulse oximeter with separate ensemble averaging for oxygen saturation and heart rate | 20060195280 | 20060831 |
| The use of two separate ensemble averagers for processing a detected waveform for use in calculating oxygen saturation and a pulse rate. The ensemble averager used for calculating oxygen saturation operates on a signal which has been normalized, while the ensemble averager for the pulse rate calculation operates on a signal which has not been normalized. The metrics chosen for the two paths through the two ensemble averagers can be varied to optimize the ensemble averaging for oxygen saturation or pulse rate calculations.
... |
| Pulse oximeter and sensor optimized for low saturation | 20060189862 | 20060824 |
| Embodiments of the present invention are directed to a system and method for measuring blood oxygen saturation. Specifically, embodiments of the present invention include emitting light having a wavelength spectrum that is optimized for an oxygen saturation reading less than 80 percent, detecting the light, and transmitting signals based on the detected light, the signals being useful in determining blood oxygen saturation with a pulse oximeter.
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| Portable patient monitor | 20060189871 | 20060824 |
| Embodiments of the present disclosure includes a portable pulse oximeter, such as a handheld pulse oximeter, that provides a user with intuitive key navigation for device operation, which reduces an amount of visual concentration needed to handle and operate the oximeter. In various embodiments, the portable pulse oximeter includes one or more of user input keys disposed along curve, an alignment edge providing guidance by feel of a user's digits to the input keys, raised convex keys also providing navigation by feel, a protective boot disposed around various portions of the oximeter housing to protect against impacts, a table-top stand, combinations of the same, or the like.
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| Apnea detection system | 20060189872 | 20060824 |
| A method and apparatus are described for utilizing a source of vascular pulse waveform data from a patient for the purpose of measuring pulsus paradoxus. The arterial pulse waveform data source described is a pulse oximeter plethysmograph but can be any similar waveform data source, including an intra-arterial transducer, external blood pressure transducer, or plethysmograph. Through incorporation of measurements of values, such as an area under a pulse waveform curve, that are time-domain functions of a change in amplitude of the pulse waveform over a duration of the waveform, embodiments of the present invention represent a significant improvement upon previously described methods of measuring pulsus paradoxus.
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| Pulse oximeter with parallel saturation calculation modules | 20060183988 | 20060817 |
| A method and apparatus for reducing the effects of noise on a system for measuring physiological parameters, such as, for example, a pulse oximeter. The method and apparatus of the invention take into account the physical limitations on various physiological parameters being monitored when weighting and averaging a series of measurements. Varying weights are assigned different measurements, measurements are rejected, and the averaging period is adjusted according to the reliability of the measurements. Similarly, calculated values derived from analyzing the measurements are also assigned varying weights and averaged over adjustable periods. More specifically, a general class of filters such as, for example, Kalman filters, is employed in processing the measurements and calculated values. The filters use mathematical models which describe how the physiological parameters change in... |
| Finger sleeve sensor holder | 20060173247 | 20060803 |
| A conformable medical sensor is provided that has particular applicability for positioning a pulse oximeter sensor relative to a patient appendage. In one embodiment, the sensor holder includes a patient engaging member that is plastically deformable to permit the sensor holder to be conformed to the patient appendage, and plastically deformable to provide a retention force relative to the patient appendage. For example, the engaging member may be bent into a first shape that disposes first and second portions of the sensor holder into an opposing relationship the for receiving a patient appendage therebetween. Once deformed, the engaging member may be elastically deformed to a second shape to provide a retention force so as to maintain the sensor holder and a sensor interconnected thereto in contact... |
| Sleep evaluation method, sleep evaluation system, operation program for sleep evaluation system, pulse oximeter, and sleep support system | 20060173257 | 20060803 |
| Measurement is made about a necessary evaluation parameter of a subject, the parameter being variable due to sleep apnea of the subject. A body position of the subject is detected in terms of angle information. The parameter measurement and the body angle detection are executed at a predetermined sampling frequency. These data are stored in a storage. A sleep evaluation system includes: an evaluation parameter detector for measuring an evaluation parameter of a subject, a body position detector for detecting a body position of the subject in terms of angle information; a storage for storing measurement data acquired by the evaluation parameter detector and by the body position detector therein; and a controller for causing the evaluation parameter detector to measure the evaluation parameter, and causing... |
| System and method for automatic detection of a plurality of spo2 time series pattern types | 20060149144 | 20060706 |
| The disclosed embodiments relate to pulse oximetry. An exemplary pulse oximeter comprises a probe that is adapted to be attached to a body part of a patient to create a signal indicative of an oxygen saturation of blood of the patient, and a processor that is adapted to receive the signal produced by the probe, to calculate an SPO2 value based on the signal, to detect a plurality of pattern types of SPO2 indicative of pathophysiologic events, and to produce an output indicative of a detected one of the plurality of pattern types.
... |
| Signal quality metrics design for qualifying data for a physiological monitor | 20060135860 | 20060622 |
| A method and a device for determining the quality of signal used for measuring a physiological parameter. One embodiment of the present invention is directed towards a pulse oximeter, where the measured physiological parameter includes a patient's pulse rate and blood oxygen saturation. The signal quality, which is indicative of the accuracy and reliability of the measured physiological parameter, is calculated by combining a plurality of signal quality indicators, each of which is an indicator of a quality of the measured signal. The value of the signal quality metric is compared to a threshold and based on this comparison various decisions are made by the medical device. One decision is directed towards deciding whether or not to display the measured physiological parameter, to ensure that only... |
| Relative phase estimation of harmonic frequency component of a plethysmographic waveform | 20060122476 | 20060608 |
| Detector signals in a pulse oximeter are analyzed to determine a quality of the signals in relation to desired information content or artifact content. The analysis involves performing a transform on a signal to obtain frequency related information and analyzing the frequency related information to obtain a value independent of a shape and waveform of a spectrum of the time-based signal. The analysis involves consideration of the relative phase of the fundamental and harmonic components of a signal. Signals including desired physiological information can be distinguished from artifact affected signals. Based on this analysis, signals can be validated or an appropriate processing algorithm can be selected.
... |
| Blind source separation of pulse oximetry signals | 20060111623 | 20060525 |
| A method and apparatus for the application of Blind Source Separation (BSS), specifically independent Component Analysis (ICA) to mixture signals obtained by a pulse oximeter sensor. In pulse oximetry, the signals measured at different wavelengths represent the mixture signals, while the plethysmographic signal, motion artifact, respiratory artifact and instrumental noise represent the source components. The BSS is carried out by a two-step method including an ICA. In the first step, the method uses Principal Component Analysis (PCA) as a preprocessing step, and the Principal Components are then used to derive sat and the Independent Components, where the Independent Components are determined in a second step. In one embodiment, the independent components are obtained by high-order decorrelation of the principal components, achieved by maximizing the sum of... |
| Use of time indexed plethysmographic spectral data in assessing saturation estimation validity | 20060094943 | 20060504 |
| Detector signals in a pulse oximeter are analyzed to determine a quality of the signals in relation to desired information content or artifact content. The analysis involves performing a transform on a signal to obtain frequency related information and analyzing the frequency related information to obtain a value independent of a shape and waveform of a spectrum of the time-based signal. In one implementation, the analysis involves the relative amplitude or power measures of corresponding peaks in the red and infrared spectra. For example, the ratio of the amplitude of the fundamental peak in the red spectrum and the amplitude of the fundamental peak in the infrared spectrum may be tracked over time. In another implementation, the analysis involves consideration of the relative phase of the... |
