And Other Cardiovascular Parameters Patents (Class 600/324)
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Publication number: 20130066177Abstract: The calculation amount of the whole can be reduced. A biological signal measuring apparatus includes a biological signal measuring unit which measures a biological signal; and a calculation processing unit which performs calculation processes on the measured biological signal, wherein the calculation processing unit has: a first calculation processing unit which performs calculation processes required for calculating the biological signal, and which is independently controllable; and a second calculation processing unit which performs a specific calculation process, and which is independently controllable, and, when the first calculation processing unit satisfies given conditions, the second calculation processing unit is caused to perform the specific calculation process.Type: ApplicationFiled: September 7, 2012Publication date: March 14, 2013Applicant: NIHON KOHDEN CORPORATIONInventors: Katsuhide TONE, Katsuyoshi SUZUKI
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Publication number: 20130066176Abstract: Methods and systems are discussed for determining venous oxygen saturation by calculating a ratio of ratios from respiration-induced baseline modulations. A calculated venous ratio of ratios may be compared with a look-up table value to estimate venous oxygen saturation. A calculated venous ratio of ratios is compared with an arterial ratio of ratios to determine whether baseline modulations are the result of a subject's respiration or movement. Such a determination is also made by deriving a venous ratio of ratios using a transform technique, such as a continuous wavelet transform. Derived venous and arterial saturation values are used to non-invasively determine a cardiac output of the subject.Type: ApplicationFiled: September 9, 2011Publication date: March 14, 2013Applicant: Nellcor Puritan Bennett IrelandInventors: Paul Addison, James Watson, James Ochs
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Publication number: 20130066174Abstract: Methods and systems are discussed for determining venous oxygen saturation by calculating a ratio of ratios from respiration-induced baseline modulations. A calculated venous ratio of ratios may be compared with a look-up table value to estimate venous oxygen saturation. A calculated venous ratio of ratios is compared with an arterial ratio of ratios to determine whether baseline modulations are the result of a subject's respiration or movement. Such a determination is also made by deriving a venous ratio of ratios using a transform technique, such as a continuous wavelet transform. Derived venous and arterial saturation values are used to non-invasively determine a cardiac output of the subject.Type: ApplicationFiled: September 9, 2011Publication date: March 14, 2013Applicant: Nellcor Puritan Bennett IrelandInventors: Paul S. Addison, James Watson, James Ochs, Scott McGonigle
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Publication number: 20130066175Abstract: Methods and systems are discussed for determining venous oxygen saturation by calculating a ratio of ratios from respiration-induced baseline modulations. A calculated venous ratio of ratios may be compared with a look-up table value to estimate venous oxygen saturation. A calculated venous ratio of ratios is compared with an arterial ratio of ratios to determine whether baseline modulations are the result of a subject's respiration or movement. Such a determination is also made by deriving a venous ratio of ratios using a transform technique, such as a continuous wavelet transform. Derived venous and arterial saturation values are used to non-invasively determine a cardiac output of the subject.Type: ApplicationFiled: September 9, 2011Publication date: March 14, 2013Applicant: Nellcor Puritan Bennett IrelandInventors: Paul Addison, James Watson
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Publication number: 20130060098Abstract: The present invention relates to a novel monitoring device suitable for attachment to a surface of a subject and for monitoring specific physiological signals of a subject wearing the device.Type: ApplicationFiled: December 22, 2010Publication date: March 7, 2013Applicant: DELTA, DANSK ELEKTRONIK, LYS OG AKUSTIKInventors: Erik V. Thomsen, Rasmus Grønbek Haahr, Sune Duun
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Publication number: 20130060110Abstract: 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.Type: ApplicationFiled: September 5, 2012Publication date: March 7, 2013Inventors: Lawrence A. Lynn, Eric N. Lynn
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Patent number: 8391944Abstract: A medical device includes one or more sensors used to acquire a multi-dimensional signal. In one embodiment, principal component analysis is performed on the multi-dimensional signal to produce signal data. The principal component analysis results are used to cancel signal artifact in one embodiment. A medical device controller produces one of a therapy control and a diagnostic output in response to the signal data.Type: GrantFiled: January 15, 2010Date of Patent: March 5, 2013Assignee: Medtronic, Inc.Inventors: Richard J. O'Brien, D. Curtis Deno, David A. Anderson, David R. Bloem
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Publication number: 20130053664Abstract: Methods for determining a cardiovascular parameter, e.g., a parameter reflecting fluid or volume responsiveness, using a modified waveform dataset are described. The waveform dataset corresponds to a signal, for example, from an arterial blood pressure, or any signal proportional to, or derived from the arterial pressure signal. These methods involve identifying individual cardiac cycles in the waveform dataset, measuring the waveform characteristics for the individual cycles, then determining if the individual cardiac cycles are regular cardiac cycles or irregular cardiac cycles. Once any irregular cardiac cycles are detected, a respiratory parameter is measured. Next, a modified waveform dataset containing the waveform characteristics of the regular cardiac cycles and the waveform characteristics of the irregular cardiac cycles is created wherein the waveform characteristics of the irregular cardiac cycles are replaced with estimated waveform characteristics.Type: ApplicationFiled: January 28, 2011Publication date: February 28, 2013Applicant: EDWARDS LIFESCIENCES CORPORATIONInventors: Zhongping Jian, Feras Hatib
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Publication number: 20130046160Abstract: 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 output means arranged in communication with the analyser component.Type: ApplicationFiled: August 20, 2012Publication date: February 21, 2013Applicant: NELLCOR PURITAN BENNETT IRELANDInventors: Paul Stanley Addison, James Nicholas Watson
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Publication number: 20130046158Abstract: A patient in intensive care is monitored by connecting the outputs of a plurality of sensors to a computer, where the sensors all relate to one mode of functioning such as heart beating, respiration, infusion of a liquid into the patient, etc. The sensor outputs are delivered to a computer that sounds an alarm, only if all sensors that indicate one function (e.g. heart beating) indicate dangerously low operation of that function. This avoids many false alarms caused by one sensor having a low output such as due to accidental disconnection of a wire.Type: ApplicationFiled: August 17, 2011Publication date: February 21, 2013Inventors: Joe Bisera, Wanchun Tang
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Publication number: 20130046159Abstract: The invention provides a physiological probe that comfortably attaches 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, which comprises a separate cradle module and sensor module, secures to the thumb and measures time-dependent signals corresponding to LEDs operating near 660 and 905 nm. The cradle module, which contains elements subject to wear, is preferably provided as a disposable unit.Type: ApplicationFiled: February 17, 2012Publication date: February 21, 2013Inventors: Devin McCombie, Gunnar Trommer, Jim Moon, Marshall Dhillon, Scott Clear, Julian Groeli
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Publication number: 20130046162Abstract: High resolution full disclosure ECG data is transferred from a body sensor device to a handheld device via a wireless protocol. The handheld device transfers the full disclosure ECG data via a network to a center for analysis.Type: ApplicationFiled: October 25, 2012Publication date: February 21, 2013Applicant: BIOMEDICAL SYSTEMS CORPORATIONInventor: BIOMEDICAL SYSTEMS CORPORATION
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Publication number: 20130046161Abstract: 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 output means arranged in communication with the analyser component.Type: ApplicationFiled: August 20, 2012Publication date: February 21, 2013Applicant: NELLCOR PURITAN BENNETT IRELANDInventors: Paul Stanley Addison, James Nicholas Watson
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Publication number: 20130041240Abstract: The present disclosure is directed towards embodiments of systems and methods for discriminating (e.g., masking out) scale bands that are determined to be not of interest from a scalogram derived from a continuous wavelet transform of a signal. Techniques for determining whether a scale band is not of interest include, for example, determining whether a scale band's amplitude is being modulated by one or more other bands in the scalogram. Another technique involves determining whether a scale band is located between two other bands and has energy less than that of its neighboring bands. Another technique involves determining whether a scale band is located at about half the scale of another, more dominant (i.e., higher energy) band.Type: ApplicationFiled: October 15, 2012Publication date: February 14, 2013Applicant: Nellcor Puritan Bennett IrelandInventor: Nellcor Puritan Bennett Ireland
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Patent number: 8374665Abstract: A tissue profile wellness monitor measures a physiological parameter, generates a tissue profile, defines limits and indicates when the tissue profile exceeds the defined limits. The physiological parameter is responsive to multiple wavelengths of optical radiation after attenuation by constituents of pulsatile blood flowing within a tissue site. The tissue profile is responsive to the physiological parameter. The limits are defined for at least a portion of the tissue profile.Type: GrantFiled: April 21, 2008Date of Patent: February 12, 2013Assignee: Cercacor Laboratories, Inc.Inventor: Marcelo Lamego
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Publication number: 20130035562Abstract: 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.Type: ApplicationFiled: October 12, 2012Publication date: February 7, 2013Applicant: NELLCOR PURITAN BENNETT LLCInventor: NELLCOR PURITAN BENNETT LLC
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Publication number: 20130035571Abstract: Disclosed embodiments include a the portable medical apparatus that comprises (a) a patient monitor comprising a plurality of wireless biomedical sensors including an electrocardiogram sensor, a non-invasive blood pressure sensor, and a pulse oximetry sensor; and (b) a communications module configured to wirelessly transmit jointly compressed signals. The communication module is configured to transmit signals as a block of coherent data. Additionally, the communication module includes fast-joint coding and decoding, transmission error correction, information exchange between different layers to optimize network throughput, and adapts the Quality of Service (QoS) guarantees for each type of traffic offered.Type: ApplicationFiled: July 23, 2012Publication date: February 7, 2013Applicant: IMAXDI REAL INNOVATION SLInventors: Juan Miguel Moure Alonso, Javier Alvarez Osuna, Andrés Íñiguez Romo, Antonio Arias Losada, Santiago Pan Carneiro, Francisco Alberto Rocha Rivera, Jacobo Campos Casal, Juan Pablo Bar Riveiro
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Publication number: 20130030267Abstract: Embodiments of the present disclosure relate to multi-purpose sensors for monitoring a plurality of physiological parameters. According to certain embodiments, the multi-purpose sensors may include optical elements for determining oxygen saturation and regional saturation. In additional embodiments, such sensor may include multiple electrodes that are configured for bispectral index monitoring. In particular embodiments, portions of the multi-purpose sensors may be removed and discarded when no longer needed.Type: ApplicationFiled: July 29, 2011Publication date: January 31, 2013Applicant: Nellcor Puritan Bennett LLCInventors: Daniel Lisogurski, Andy S. Lin, Friso Schlottau
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Patent number: 8364226Abstract: 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 patient. Use of this invention is described in particular detail with respect to oximetry-based measurements.Type: GrantFiled: February 9, 2012Date of Patent: January 29, 2013Assignee: Masimo CorporationInventors: Mohamed K. Diab, Esmaiel Kiani-Azarbayjany, Ibrahim M. Elfadel, Rex J. McCarthy, Walter M. Weber, Robert A. Smith
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Patent number: 8364223Abstract: A patient monitor has multiple sensors adapted to attach to tissue sites of a living subject. The sensors generate sensor signals that are responsive to at least two wavelengths of optical radiation after attenuation by pulsatile blood within the tissue sites.Type: GrantFiled: May 3, 2006Date of Patent: January 29, 2013Assignee: Masimo CorporationInventors: Ammar Al-Ali, Mohamed K. Diab, Massi E. Kiani, Robert James Kopotic, David Tobler
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Patent number: 8359079Abstract: 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.Type: GrantFiled: September 20, 2007Date of Patent: January 22, 2013Assignee: Starr Life Sciences CorporationInventors: Bernard F. Hete, Eric W Starr, Eric J Ayers
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Patent number: 8359080Abstract: 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 patient. Use of this invention is described in particular detail with respect to oximetry-based measurements but extends to other types of measurements.Type: GrantFiled: February 15, 2012Date of Patent: January 22, 2013Assignee: Masimo CorporationInventors: Mohamed K. Diab, Esmaiel Kiani-Azarbayjany, Ibrahim M. Elfadel, Rex J. McCarthy, Walter M. Weber, Robert A. Smith
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Publication number: 20130018241Abstract: An apparatus for measuring capillary refill time has a measurement module containing at least two radiation sources and at least one detector configured to detect radiation from each source that interacts with and is received from a measurement region of a patient or subject. One radiation source may be characterized by a wavelength that is absorbed substantially equally by oxyhemoglobin and deoxyhemoglobin. The other radiation source may be substantially unaffected by the presence or absence of blood in the measurement region. The measurement module may be applied against a measurement region of a patient for a first time period, and the released from the measurement region for a second time period, and detected signals processed to quantitatively evaluate capillary refill time.Type: ApplicationFiled: December 23, 2010Publication date: January 17, 2013Applicant: Childeren's Medical Center CorporationInventors: Vassilios Bezzerides, Mark Ian Neuman
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Publication number: 20130012792Abstract: According to embodiments, techniques for using continuous wavelet transforms and spectral transforms to identify pulse rates from a photoplethysmographic (PPG) signal are disclosed. According to embodiments, candidate pulse rates of the PPG signal may be identified from a wavelet transformed PPG signal and a spectral transformed PPG signal. A pulse rate may be determined from the candidate pulse rates by selecting one of the candidate pulse rates or by combining the candidate pulse rates. According to embodiments, a spectral transform of a PPG signal may be performed to identify a frequency region associated with a pulse rate of the PPG signal. A continuous wavelet transform of the PPG signal at a scale corresponding to the identified frequency region may be performed to determine a pulse rate from the wavelet transformed signal.Type: ApplicationFiled: September 14, 2012Publication date: January 10, 2013Applicant: NELLCOR PURITAN BENNETT IRELANDInventors: Paul Stanley Addison, James Nicholas Watson
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Patent number: 8352003Abstract: A highly miniaturized biosensor and a sensor unit, which can meet a demand for further miniaturization. With this invention, miniaturization is possible, and the number of production steps including those for assembling individual parts can be reduced. Accordingly, mass production will be possible, and cost reduction and high reliability will be achieved. A light emitting unit (21) and a light receiving unit (22) are disposed in a same recess (24) formed on a surface of a semiconductor substrate (23), and a light shielding cover substrate (27) having a first light guide section (25) and a second light guide section (26) is disposed on an upper side of the semiconductor substrate (23).Type: GrantFiled: November 1, 2005Date of Patent: January 8, 2013Assignees: Kyushu University, National University Corporation, The University of TokyoInventors: Renshi Sawada, Eiji Higurashi
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Patent number: 8352033Abstract: Methods and apparatus for accurately and painlessly measuring the impedance between defibrillation electrodes implanted in a patient utilize a high current test pulse delivered with a sufficiently high current to produce an accurate measurement of the defibrillation electrode impedance while limiting the duration of the test pulse such that the pain sensing cells in the patient do not perceive the test pulse. In one embodiment, the test pulse is generated from the high voltage transformer without storing energy in the high voltage capacitors and is delivered to the defibrillation electrodes in the patient utilizing the high voltage switching circuitry.Type: GrantFiled: October 15, 2008Date of Patent: January 8, 2013Inventor: Mark Kroll
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Publication number: 20130006077Abstract: A method for measuring blood flow velocity comprises: placing a first and second blood vessel signal detectors on a body of a person to be measured in such a manner that the first and second blood vessel signal detectors are located a predetermined distance from each other; amplifying blood signal detected by the first and second blood vessel signal detectors; using the first and second blood vessel signal analyzers to record the blood signal at a predetermined time interval; setting an interval of time from the moment a specific blood vessel signal appears in a record of the first blood vessel signal analyzer to the moment the specific blood vessel signal appears in a record of the second blood vessel signal analyzer to be a predetermined time period; and dividing a value of the predetermined distance by a value of the predetermined time period can get a blood flow velocity.Type: ApplicationFiled: September 13, 2012Publication date: January 3, 2013Inventors: Hsueh-Kuan LU, Chih-Yi LU, Yi-Te Lu
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Publication number: 20120330118Abstract: A system and method for the automatic diagnosis of obstructive sleep apnea in a centralized hospital critical care monitoring system for the monitoring of a plurality of patients in at least one of a critical care, step down, and cardiac ward by telemetry. The system includes a central processor having a display, and a plurality of telemetry units for mounting with patients, each of the telemetry units has a plurality of sensors for connection with each patient, the telemetry unit is capable of the transmission of multiple signals derived from the sensors to the central processor, in one preferred embodiment the method comprising steps of programming the system to analyze the signals and to automatically identify the presence and severity of obstructive sleep apnea and to provide an indication of the identification.Type: ApplicationFiled: September 5, 2012Publication date: December 27, 2012Inventors: Lawrence A. Lynn, Eric N. Lynn
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Publication number: 20120330117Abstract: Tools and techniques for estimating a probability that a patient is bleeding or has sustained intravascular volume loss (e.g., due to hemodialysis or dehydration) and/or to estimate a patient's current hemodynamic reserve index, track the patient's hemodynamic reserve index over time, and/or predict a patient's hemodynamic reserve index in the future. Tools and techniques for estimating and/or predicting a patient's dehydration state. Tools and techniques for controlling a hemodialysis machine based on the patient's estimated and/or predicted hemodynamic reserve index.Type: ApplicationFiled: July 20, 2012Publication date: December 27, 2012Applicants: The Regents of the University of Colorado, a body corporate, Flashback Technologies, Inc.Inventors: Gregory Zlatko Grudic, Steven Lee Moulton, Isobel Jane Mulligan
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Publication number: 20120323095Abstract: A method is provided for determining contact of a sensor with a patient's tissue. The method comprises comparing the intensity of detected light at a first wavelength to a threshold, wherein the first wavelength is not used to determine a physiological characteristic of the patient, and determining if the sensor is in contact with the patient's tissue based on the comparison. In addition, a method is provided for determining the amount of light shunting during operation of the sensor. The method comprises comparing the intensity of detected light at a first wavelength to a threshold, wherein the first wavelength is not used to determine a physiological characteristic of the patient, and determining the amount of light shunting based on the comparison.Type: ApplicationFiled: August 29, 2012Publication date: December 20, 2012Applicant: NELLCOR PURITAN BENNETT LLCInventor: Clark R. Baker, Jr.
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Publication number: 20120310060Abstract: A monitoring system may include an emission feature capable of emitting light into tissue, a modulator capable of modulating the emitter at a modulation frequency, e.g., in a range of about 10 MHz to 3.0 GHz, to generate resolvable photon density waves, a detection feature capable of detecting photons of the photon density waves after passage through the tissue, and a processor capable of using phase and amplitude differences of the photon density wave signal relative to a reference to determine one or more physiological parameters. The phase and amplitude differences may be much lower frequency that the modulation rate. Accordingly, these differences may be masked by signal artifacts. Provided herein are signal conditioning techniques that may improve the signal to noise ratio of photon density wave signals and yield a more robust phase and amplitude signal.Type: ApplicationFiled: May 31, 2011Publication date: December 6, 2012Applicant: Nellcor Puritan Bennett LLCInventors: Clark R. Baker, JR., Youzhl Li, Andy S. Lin, Daniel Lisogurski
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Publication number: 20120310061Abstract: A pulse oximetry sensor includes reusable and disposable elements. To assemble the sensor, members of the reusable element are mated with assembly mechanisms of the disposable element. The assembled sensor provides independent movement between the reusable and disposable elements.Type: ApplicationFiled: August 14, 2012Publication date: December 6, 2012Inventors: Ammar Al-Ali, Yassir Abdul-Hafiz
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Publication number: 20120302846Abstract: The invention relates inter alia to a method for measuring the oxygen saturation of the blood flowing in a peripheral human or animal body part (20), in which electromagnetic radiation (q1?(t), q2?(t)) having a first and a second wavelength is irradiated into the peripheral body part or irradiated through the peripheral body part, the reflected or transmitted radiation (x1?(t), x2?(t)) is measured to form two measurement signals (x1(t), x2(t)), and the oxygen saturation of the blood is determined by evaluating the two measurement signals.Type: ApplicationFiled: January 28, 2011Publication date: November 29, 2012Inventors: Achim Volmer, Reinhold Orglmeister, Eugen Hoffmann, Dorothea Kolossa
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Patent number: 8320985Abstract: Examples of touch screen interfaces with pulse oximetry are generally described, along with examples of methods of determining pulse rate, blood oxygen level, or both, with a touch screen interface.Type: GrantFiled: April 2, 2009Date of Patent: November 27, 2012Assignee: Empire Technology Development LLCInventor: Seth Adrian Miller
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Publication number: 20120296184Abstract: Methods and apparatus for qualifying and quantifying excitation-dependent physiological information extracted from wearable sensors in the midst of interference from unwanted sources are provided. An organism is interrogated with at least one excitation energy, energy response signals from two or more distinct physiological regions are sensed, and these signals are processed to generate an extracted signal. The extracted signal is compared with a physiological model to qualify and/or quantify a physiological property. Additionally, important physiological information can be qualified and quantified by comparing the excitation wavelength-dependent response, measured via wearable sensors, with a physiological model.Type: ApplicationFiled: August 3, 2012Publication date: November 22, 2012Inventors: Steven Francis LeBoeuf, Jesse Berkley Tucker, Michael Edward Aumer
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Publication number: 20120296183Abstract: A method for performing a patient oxygenation test using one or more computing devices is provided. The patient oxygenation test comprises a plurality of instructions for implementing a workflow for determining an oxygenation status for a patient. An entry or selection is received of one or more physiological parameters for the patient to be monitored during the patient oxygenation test. An entry or selection is received of one or more thresholds for at least one of the physiological parameters to be monitored during the patient oxygenation test. A determination is made as to whether any of the physiological parameters exceed limits set by the one or more thresholds. One or more actions are taken when one or more of the physiological parameters exceed the limits set by the one or more thresholds. A summary and analysis are provided of the test results.Type: ApplicationFiled: May 17, 2011Publication date: November 22, 2012Applicant: WELCH ALLYN, INC.Inventors: Matthew J. Kinsley, Matthew D. Mullin, John A. Lane, Cynthia A. Kuiper, Daniel J. Wilson, Shawn C. St. Pierre
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Patent number: 8308641Abstract: A highly portable biometric monitor is disclosed. At least one remote sensor member (12, 12?) includes one or more biometric sensors (20, 22, 24, 25) configured for operative coupling with a patient. A neck collar (14, 114, 214, 314, 414) includes electronics (36, 40, 42, 44, 46, 48) for operating the at least one remote sensor member. The at least one remote sensor member is separate from and not disposed on the neck collar. Optionally, the collar also includes one or more biometric sensors (53). A communication link (18) operatively connects the remote sensor member and the electronics of the neck collar. A motion sensor (26) and position sensor (28) may be disposed with the one or more biometric sensors to sense movement and position, and the electronics (36, 40, 42, 44, 46, 48) configured to account for error in a signal produced by the one or more biometric sensors due to movement sensed by the motion sensor or position sensed by the position sensor.Type: GrantFiled: February 6, 2007Date of Patent: November 13, 2012Assignee: Koninklijke Philips Electronics N.V.Inventors: Richard M. Moroney, III, Larry Nielsen, Suzanne M. Kavanagh, Ronaldus M. Aarts, Margreet De Kok
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Publication number: 20120283535Abstract: A method and system for determining a person's heart pulse rate in noisy environments is provided. The method of determining a person's heart pulse rate includes radiating first and second wavelengths of light towards a tissue, measuring and storing a first and second set of parameter values from the signals reflected back from the first and second wavelengths respectively. The first set of parameter values represents a first signal corresponding to a combination of the heart pulse rate and extraneous noise and the second set of parameter values represents a second signal mainly comprising extraneous noise. The heart pulse rate is obtained by deducting the second set of parameter values from the first set of parameter values.Type: ApplicationFiled: November 30, 2010Publication date: November 8, 2012Inventor: Israel Sarussi
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Publication number: 20120283536Abstract: According to embodiments, systems and methods are provided that use continuous wavelet transforms and basis functions to provide an optimized system for the determination of physiological information. In an embodiment, the basis functions may be used to refine an area of interest in the signal in frequency or in time, and the continuous wavelet transform may be used to identify a maxima ridge in the scalogram at scales with characteristic frequencies proximal to the frequency or frequencies of interest. In another embodiment, a wavelet transform may be used to identify regions of a signal with the morphology of interest while basis functions may be used to focus on these regions to determine or filter information of interest. In yet another embodiment, basis functions and continuous wavelet transforms may be used concurrently and their results combined to form optimized information or a confidence metric for determined physiological information.Type: ApplicationFiled: July 11, 2012Publication date: November 8, 2012Applicant: Nellcor Puritan Bennett IrelandInventors: James Nicholas Watson, Paul Stanley Addison
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Publication number: 20120283534Abstract: Apparatus for detecting intracranial temperature and blood oxygenation includes a transducer having a working surface for placement against a patient's cranium. The transducer forms a microwave antenna having walls defining an aperture having a pair of opposite broader boundaries and a pair of opposite narrower boundaries at the working surface. The antenna is tuned to a frequency which produces a first output signal indicative of heat emanating from the cranium. An oxygen saturation sensor sharing that aperture includes a radiation emitter located at one of narrower boundaries which directs electromagnetic radiation across the aperture to a radiation detector at the other of the narrower boundaries and which produces a corresponding second output signal. A control unit includes a display and a processor for processing the signals to calculate an intracranial temperature and an oxygen saturation value for display by the control unit.Type: ApplicationFiled: April 30, 2012Publication date: November 8, 2012Inventors: Kenneth L. Carr, Robert C. Allison
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Patent number: 8306597Abstract: A physiological signal sensing device for examination of human is provided. The physiological signal sensing device includes a light emitting fiber and a light receiving fiber. The light emitting fiber includes a plurality of light emitting portions, wherein the light emitting fiber provides a plurality of sensing beams, and the sensing beams are respectively emitted through the light emitting portions. The light receiving fiber includes a plurality of light receiving portions. The light receiving fiber corresponds to the light emitting fiber. The sensing beams are emitted through the light emitting portions, reflected or refracted by the human. And then the sensing beams are received by the light receiving portions.Type: GrantFiled: March 10, 2010Date of Patent: November 6, 2012Assignee: Industrial Technology Research InstituteInventors: Wen-Ying Chang, Cheng-Hung Chang
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Publication number: 20120277561Abstract: In accordance with an embodiment of the present technique, there is provided methods and systems for detecting the presence of venous pulsation by adjusting the sensitivity of a detection algorithm based on a sensor characteristic and/or notifying a caregiver of the presence of venous pulsation by ceasing display of physiological parameters. An exemplary embodiment includes receiving one or more signals from a sensor, the one or more signals corresponding to absorption of light in a patient's tissue; calculating one or more physiological parameters of the patient based on the one or more signals; displaying the patient's physiological parameters; enabling detection of venous pulsation with variable sensitivity based on a location of the sensor; and suspending or terminating the display of the one or more of the patient's physiological parameters when venous pulsation is detected.Type: ApplicationFiled: July 12, 2012Publication date: November 1, 2012Applicant: NELLCOR PURITAN BENNETT LLCInventors: Clark R. Baker, JR., Paul Manneheimer
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Publication number: 20120277560Abstract: A sensor may be adapted to reduce motion artifacts by damping the effects of outside forces and sensor motion. A sensor is provided with a motion damping structure adapted to reduce the effect of motion of a sensor emitter and/or detector. Further, a method of damping outside forces and sensor motion is also provided.Type: ApplicationFiled: July 9, 2012Publication date: November 1, 2012Applicant: NELLCOR PURITAN BENNETT LLCInventor: Carine Hoarau
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Publication number: 20120277559Abstract: Apparatus for measuring blood parameters such as chromophore, for example haemoglobin, concentration and blood flow detects light scattered from tissue surface (20) with a multispectral detector (24) that is sensitive to light across a range of different wavelengths. Algorithms are described that demonstrate extraction of chromophore information from scattered light occupying two, red and green or blue, or three bands of the visible spectrum. Simultaneous extraction of blood flow information from scattered laser light occupying either the same or a distinct spectral band is also described.Type: ApplicationFiled: December 8, 2010Publication date: November 1, 2012Inventors: Matthias Kohl-Bareis, Branislav Ebert, Jens P. Dreier, Christoph Leithner, Ute Lindauer, Georg Royl
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Publication number: 20120277558Abstract: A filter for detecting changes in skin color. The filter includes a filter material capable of filtering a frequency range and configured to orthogonalize an overall red response and an overall blue response in response to a spectral power distribution of a given light condition. The overall red response is based on a first plurality of spectral responses for a first human perceived chromatic channel used primarily for detecting blood oxygenation in a human. The overall blue response is based on a second plurality of spectral responses for a second human perceived chromatic channel used primarily for detecting blood volume.Type: ApplicationFiled: February 23, 2009Publication date: November 1, 2012Inventors: Timothy P. Barber, Mark Changizi
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Patent number: 8301215Abstract: A biosignal measurement apparatus including: a bracelet membrane to wear around a user's wrist; a fixing supporter to install in a first side portion of the bracelet membrane and to support a first side portion of the wrist; a moving supporter to install in a second side portion of the bracelet membrane, to move towards the fixing supporter, and closely to attach to a second side portion of the wrist; and an information control unit to calculate a distance between the first side portion of the wrist and the second side portion of the wrist by detecting a movement distance of the moving supporter, and to calculate a displacement of the radial artery of the wrist by using a predetermined constant and the calculated distance between the first side portion of the wrist and the second side portion of the wrist.Type: GrantFiled: June 29, 2007Date of Patent: October 30, 2012Assignees: Samsung Electronics Co., Ltd., National University Corporation Kanazawa UniversityInventors: Jong Youn Lee, Kenichi Yamakoshi, Kun Soo Shin, Hye Jin Jung, Shinobu Tanaka, Takehiro Yamakoshi
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Patent number: 8298154Abstract: 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 then conducted on this reconstructed time-domain signal.Type: GrantFiled: January 10, 2008Date of Patent: October 30, 2012Assignee: Starr Life Sciences CorporationInventors: Bernard F. Hete, Eric J Ayers
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Publication number: 20120271131Abstract: A sensor for physiological constituent detection may be adapted to include a mucoadhesive. A sensor is provided that is appropriate for use on mucosal tissue. The mucoadhesive provides a mechanism for holding the sensor on the mucous membrane in order to measure physiological constituent levels in the tissue and blood.Type: ApplicationFiled: July 2, 2012Publication date: October 25, 2012Applicant: Nellcor Puritan Bennett LLCInventors: Carl Kling, Shannon Campbell
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Publication number: 20120271130Abstract: A method and apparatus for determining an index indicative of a subject's response to an oxygen desaturation condition is provided. The method includes the steps of: a) providing a NIRS tissue sensor, a pulse oximetry sensor, and a processor in communication with the NIRS tissue sensor and the pulse oximetry sensor; b) sensing the subject's tissue using the NIRS tissue sensor and producing first signals; c) sensing the subject's tissue using the pulse oximetry sensor and producing second signals; d) processing the first signals to determine a change in tissue oxygen saturation values, processing the second signals to determine a change in arterial oxygen saturation values; and e) determining the index indicative of the subject's response to the oxygen desaturation condition using the change in tissue oxygen saturation values and the change in arterial oxygen saturation values.Type: ApplicationFiled: April 11, 2012Publication date: October 25, 2012Applicant: CAS MEDICAL SYSTEMS, INC.Inventor: Paul Benni
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Patent number: 8295901Abstract: An apparatus for determining a spectral ratio between a first signal having a first spectrum which depends on a biological quantity, and a second signal having a second spectrum which depends on a biological quantity, the first signal and the second signal having a plurality of harmonics of a periodic signal, the apparatus including a computer for computing a first wave ratio between a spectral value of the first spectrum which has a frequency of a harmonic of the plurality of harmonics, and a spectral value of the second spectrum which has the frequency of the harmonic; and for computing a second wave ratio between a spectral value of the first spectrum which has a frequency of another harmonic of the plurality of harmonics, and a spectral value of the second spectrum which has the frequency of the other harmonic. In addition, the apparatus includes an optimizer.Type: GrantFiled: February 16, 2007Date of Patent: October 23, 2012Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung E.V.Inventors: Andreas Tobola, Ulrich Vogl, Hans-Joachim Moersdorf