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| Number | Title | Issue Date |
| 8447374 | Systems and methods for determining blood oxygen saturation values using complex number encoding The disclosure includes pulse oximetry systems and methods for determining point-by-point saturation values by encoding photoplethysmographs in the complex domain and processing the complex signals. The systems filter motion artifacts and other noise using a variety... | 05/21/2013 |
| 8442608 | System and method for estimating physiological parameters by deconvolving artifacts There is disclosed a system and methods to estimate physiological parameters. In accordance with embodiments a method is disclosed which includes generating distribution data for a plurality of signals. The method may also include deconvolving one of the plurality o... | 05/14/2013 |
| 8437824 | Body-worn pulse oximeter 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 patien... | 05/07/2013 |
| 8423109 | Method for enhancing pulse oximery calculations in the presence of correlated artifacts A method for determining a physiological parameter in the presence of correlated artifact, including obtaining two digital waveforms, x and y, the waveforms being representative of the absorption of two wavelengths of electromagnetic energy received from a blood-per... | 04/16/2013 |
| 8364225 | Estimating transform values using signal estimates According to embodiments, estimated values for a signal transform may be generated using estimated values for the signal. Signal parameters may then be determined based on the estimated signal transform. A first portion of a signal may be obtained. A second portion ... | 01/29/2013 |
| 8364226 | Signal processing apparatus The present invention involves a method and an apparatus for analyzing measured signals, including the determination of a measurement of oxygen saturation and respiration rate in the measured signals during a calculation of a physiological parameter of a monitored p... | 01/29/2013 |
| 8359080 | Signal processing apparatus The present invention involves a method and an apparatus for analyzing measured signals, including the determination of a measurement of oxygen saturation and respiration rate in the measured signals during a calculation of a physiological parameter of a monitored p... | 01/22/2013 |
| 8352008 | Active noise cancellation in an optical sensor signal A medical device system and associated method are used for monitoring tissue oxygenation. An optical sensor produces a signal corresponding to tissue light attenuation. A processor receives the optical sensor signal and computes a first measure of light attenuation ... | 01/08/2013 |
| 8346333 | Systems and methods for estimating values of a continuous wavelet transform According to embodiments, techniques for estimating scalogram energy values in a wedge region of a scalogram are disclosed. A pulse oximetry system including a sensor or probe may be used to receive a photoplethysmograph (PPG) signal from a patient or subject. A sca... | 01/01/2013 |
| 8315684 | Oximeter ambient light cancellation 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 puls... | 11/20/2012 |
| 8271063 | System and method for a non-invasive medical sensor A sensor is disclosed having one or more light sources, and one or more light detectors. At least one of the detectors produces an output in response to received light. Also, electrical circuitry in response to the output generates a pulse waveform proportional to t... | 09/18/2012 |
| 8204567 | Signal demodulation A method for processing an analog composite signal in a system has the steps of receiving a composite signal with at least one first signal component and at least one interfering signal component; filtering the composite signal with a filter having a transfer functi... | 06/19/2012 |
| 8195263 | Pulse oximetry motion artifact rejection using near infrared absorption by water A method and an apparatus for measuring a physiological parameter, functioning based on obtaining a first signal derived from electromagnetic energy transmitted through a tissue portion at a first wavelength, the first signal including a signal portion corresponding... | 06/05/2012 |
| 8190227 | Signal processing apparatus and method A method and an apparatus to analyze two measured signals that are modeled as containing desired and undesired portions such as noise, FM and AM modulation. Coefficients relate the two signals according to a model defined in accordance with the present invention. In... | 05/29/2012 |
| 8185180 | Method and apparatus for demodulating signals in a pulse oximetry system A method and an apparatus measure blood oxygenation in a subject. A light source is activated to cause a first emission at a first wavelength and a second emission at a second wavelength. A detector detects a composite signal indicative of an attenuation of the firs... | 05/22/2012 |
| 8175670 | Pulse oximetry signal correction using near infrared absorption by water A method and system for measuring a physiological parameter, comprising collecting a first absorbance at a first wavelength, chosen to be primarily absorbed by water; collecting a second absorbance at a second wavelength, chosen to be primarily absorbed by hemoglobi... | 05/08/2012 |
| 8175669 | Apparatus and method for measuring oxygen saturation in blood In an apparatus for measuring an oxygen saturation in blood, a plurality of light emitters irradiate a living tissue with a plurality of light beams having different wavelengths. A light receiver receives the light beams reflected from or transmitted through the liv... | 05/08/2012 |
| 8126528 | Signal processing apparatus The present disclosure describes a method and an apparatus for analyzing measured signals using various processing techniques. In certain embodiments, the measured signals are physiological signals. In certain embodiments, the measurements relate to blood constituen... | 02/28/2012 |
| 8073516 | Separating motion from cardiac signals using second order derivative of the photo-plethysmogram and fast fourier transforms The present invention is directed toward a pulse oximetry system for the determination of a physiological parameter capable of removing motion artifacts from physiological signals comprises a hardware subsystem and a software subsystem. The software subsystem is use... | 12/06/2011 |
| 8050730 | Method and apparatus for eliminating interference in pulse oxygen measurement The present invention discloses a method and apparatus for eliminating interference in pulse oxygen measurement. The method comprises the steps of: collecting a first wavelength light and a second wavelength light transmitting through the object to be measured and c... | 11/01/2011 |
| 8046042 | Signal processing apparatus The present disclosure describes a method and an apparatus for analyzing measured signals using various processing techniques. In certain embodiments, the measured signals are physiological signals. In certain embodiments, the measurements relate to blood constituen... | 10/25/2011 |
| 8036728 | Signal processing apparatus The present disclosure describes a method and an apparatus for analyzing measured signals using various processing techniques. In certain embodiments, the measured signals are physiological signals. In certain embodiments, the measurements relate to blood constituen... | 10/11/2011 |
| 8024021 | Time-segmented pulse oximetry and pulse oximeter performing the same To measure oxygen saturation in blood, living tissue is irradiated with a first light beam having a first wavelength and a second light beam having a second wavelength. A first electrical signal is generated from the first light beam reflected from or transmitted th... | 09/20/2011 |
| 7991448 | Method, apparatus, and system for removing motion artifacts from measurements of bodily parameters A method for removing motion artifacts from devices for sensing bodily parameters and apparatus and system for effecting same that includes analyzing segments of measured data representing bodily parameters and possibly noise from motion artifacts. Each data segment... | 08/02/2011 |
| 7962190 | Signal processing apparatus A signal processor which acquires a first signal, including a first primary signal portion and a first secondary signal portion, and a second signal, including a second primary signal portion and a second secondary signal portion, wherein the first and second primar... | 06/14/2011 |
| 7957781 | Method and circuit for storing and providing historical physiological data Embodiments of the present invention include systems and methods that relate to pulse oximetry. Specifically, one embodiment includes an oximeter sensor comprising a light emitting element configured to emit light, a light detector configured to receive the light, a... | 06/07/2011 |
| 7937130 | Signal processing apparatus A signal processor which acquires a first signal, including a first primary signal portion and a first secondary signal portion, and a second signal, including a second primary signal portion and a second secondary signal portion, wherein the first and second primar... | 05/03/2011 |
| 7738935 | Methods and devices for reduction of motion-induced noise in pulse oximetry Methods and devices are provided for reducing motion artifacts when measuring blood oxygen saturation. A portion of the light having the first wavelength, a portion of light having the second wavelength and a portion of the light having the third wavelength are rece... | 06/15/2010 |
| 7725146 | System and method for pre-processing waveforms A technique is provided for processing a physiological signal. The technique includes performing one or more multi-resolution decompositions on a physiological signal and one or more morphological operations on some or all of the respective decomposition components.... | 05/25/2010 |
| 7725147 | System and method for removing artifacts from waveforms A technique is provided for processing a physiological signal to compensate for artifacts. The technique includes identifying artifacts within the physiological signal. The technique also includes performing one or more multi-resolution decompositions, such as wavel... | 05/25/2010 |
| 7515949 | Wavelet transform of a plethysmographic signal A photoplethysmographic system and method is provided for filtering a photoplethysmographic (pleth) signal to reduce the effects of noise in the signal. The system and method utilize a combination of frequency, time and/or magnitude information, to identify and sepa... | 04/07/2009 |
| 7499741 | Signal processing apparatus and method A method and an apparatus to analyze two measured signals that are modeled as containing desired and undesired portions such as noise, FM and AM modulation. Coefficients relate the two signals according to a model defined in accordance with the present invention. In... | 03/03/2009 |
| 7471971 | Signal processing apparatus and method A method and an apparatus to analyze two measured signals that are modeled as containing desired and undesired portions such as noise, FM and AM modulation. Coefficients relate the two signals according to a model defined in accordance with the present invention. In... | 12/30/2008 |
| 7469157 | Signal processing apparatus A signal processor which acquires a first signal, including a first primary signal portion and a first secondary signal portion, and a second signal, including a second primary signal portion and a second secondary signal portion, wherein the first and second primar... | 12/23/2008 |
| 7454240 | Signal processing apparatus The present invention involves a method and an apparatus for analyzing measured signals, including the determination of a measurement of correlation in the measured signals during a calculation of a physiological parameter of a monitored patient. Use of this inventi... | 11/18/2008 |
| 7392075 | Method for enhancing pulse oximetry calculations in the presence of correlated artifacts A method for determining a physiological parameter in the presence of correlated artifact, including obtaining two digital waveforms, x and y, the waveforms being representative of the absorption of two wavelengths of electromagnetic energy received from a blood-per... | 06/24/2008 |
| 7383070 | Signal processing apparatus The present invention involves a method and an apparatus for analyzing measured signals, including the determination of a measurement of correlation in the measured signals during a calculation of a physiological parameter of a monitored patient. Use of this inventi... | 06/03/2008 |
| 7376453 | Signal processing apparatus The present invention involves method and apparatus for analyzing two measured signals that are modeled as containing primary and secondary portions. Coefficients relate the two signals according to a model defined in accordance with the present invention. In one em... | 05/20/2008 |
| 7371247 | Method and apparatus for penetrating tissue A tissue penetrating system includes a plurality of penetrating members each having a tip. A penetrating member driver is coupled to the plurality of penetrating members. Each tip of a penetrating member is uncovered during launch of the penetrating member by the pe... | 05/13/2008 |
| RE40316 | Method and device for glucose concentration measurement with special attention to blood glucose determinations The concentration of glucose in the anterior chamber of an eye is non-invasively measured by guiding a beam through a polarizer (4), a quarter wave plate (6), a polarization modulator (20), and an analyzer (7). After initializing the pola... | 05/13/2008 |
