Pulse-induced Pressure Fluctuation In Occluder Generates Electric Signal Patents (Class 600/494)
  • Publication number: 20100069764
    Abstract: The present invention relates to a blood pressure measurement apparatus comprising: an input unit where at least one value selected from the maximum applied pressure, which is the applied pressure at which the maximum pulse pressure is attained during the pulse pressure measurement at the measurement part, the maximum pulse pressure, which is the pulse pressure at the maximum applied pressure, the depth of blood vessel at the measurement part measured by a pressure sensor, the elasticity of skin tissue at the measurement part and the elasticity of blood vessel at the measurement part is inputted; and a mean arterial press calculation unit where the mean arterial pressure is calculated from the input values of the maximum applied pressure, the depth of blood vessel and the elasticity of skin tissue. The present invention offers more effective and reliable blood pressure measurement apparatus.
    Type: Application
    Filed: August 23, 2007
    Publication date: March 18, 2010
    Applicant: DAEYO MEDI CO., LTD.
    Inventor: Hee-Jung Kang
  • Publication number: 20100063406
    Abstract: A sphygmomanometer (1) stores a parameter for calculating a blood pressure value from a measurement value with clothes on from a measurement value with clothes off at a measurement site and the measurement value with clothes on in advance. When a with-clothes mode is selected with a button (3-4) in measuring the blood pressure, the blood pressure value is calculated using the parameter stored with respect to the measurement value.
    Type: Application
    Filed: April 9, 2008
    Publication date: March 11, 2010
    Applicant: OMRON HEALTHCARE CO., LTD.
    Inventor: Akihisa Takahashi
  • Publication number: 20100016737
    Abstract: A blood pressure system that includes a compact monitor housing that contains a pneumatic circuit and an electrical circuit and a processor for inflating and deflating a cuff to provide blood pressure related data. A split connector allows the housing to interface both pneumatically and electronically with one or more independent cuffs and/or with one or more host stations. Each host station contains a dependent cuff and further electrical components to expand and enhance the systems output of related blood pressure data that is generated by either the independent or dependent cuffs.
    Type: Application
    Filed: July 18, 2008
    Publication date: January 21, 2010
    Applicant: Welch Allyn, Inc.
    Inventors: Matthew J. Kinsley, John A. Lane, Scott A. Martin, Tyson B. Whitaker, Thomas J. Grant, Joseph D. Buchanan
  • Publication number: 20090326393
    Abstract: According to some embodiments, systems and methods are provided for non-invasive continuous blood pressure determination. In some embodiments, a PPG signal is received and locations of pulses within the PPG signal are identified. An area within a particular pulse is measured. The area may be of just the upstroke, downstroke or the entire pulse. The area may be measured relative to a time-domain axis or a baseline of the pulse. The pulse may be split into multiple sections and the area of each section may be measured. The area of one portion of the pulse may correspond to systolic blood pressure while the area of another portion may correspond to diastolic blood pressure. Empirical data may be used to determine blood pressure from the measured area by applying calibration data measured by a suitable device.
    Type: Application
    Filed: September 30, 2008
    Publication date: December 31, 2009
    Applicant: Nellcor Puritan Bennett Ireland
    Inventors: Rakesh Sethi, James Watson
  • Publication number: 20090326392
    Abstract: A method for non-invasively estimating blood pressure is disclosed herein. The method includes inflating a cuff and collecting first oscillation amplitude data at a first plurality of cuff pressure levels while inflating the cuff. The method includes identifying an artifact in the first oscillation amplitude data. The method includes identifying a specific cuff pressure level where the artifact occurs and deflating the cuff to the specific cuff pressure level. The method includes collecting second oscillation amplitude data at the specific cuff pressure level and estimating a blood pressure parameter based on both the first oscillation amplitude data and the second oscillation amplitude data. A non-invasive blood pressure system is also disclosed.
    Type: Application
    Filed: June 26, 2008
    Publication date: December 31, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Sai Kolluri, Bruce Arnold Friedman, Richard Medero, Lawrence T. Hersh
  • Publication number: 20090287098
    Abstract: The present invention discloses a non-invasive blood pressure measurement apparatus and a safety protection method. In addition to a main pressure measurement circuit and a main microprocessor circuit, the measurement apparatus also includes an independently disposed assist pressure measurement circuit and an independently disposed assist microprocessor circuit. In normal measurement, the assist microprocessor circuit periodically samples a cuff pressure via the assist pressure measurement circuit, and compares the measured cuff pressure with a specified overpressure protection value, and if the cuff pressure exceeds the specified overpressure protection value, the assist microprocessor circuit outputs a control signal to open a deflation valve until the pressure falls to below the safety pressure.
    Type: Application
    Filed: July 22, 2009
    Publication date: November 19, 2009
    Applicant: SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD.
    Inventors: Jian Cen, Xiaoyu Wu, He Bo
  • Patent number: 7594892
    Abstract: The present invention discloses a non-invasive blood pressure measurement apparatus and a safety protection method. In addition to a main pressure measurement circuit and a main microprocessor circuit, the measurement apparatus also includes an independently disposed assist pressure measurement circuit and an independently disposed assist microprocessor circuit. In normal measurement, the assist microprocessor circuit periodically samples a cuff pressure via the assist pressure measurement circuit, and compares the measured cuff pressure with a specified overpressure protection value, and if the cuff pressure exceeds the specified overpressure protection value, the assist microprocessor circuit outputs a control signal to open a deflation valve until the pressure falls to below the safety pressure.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: September 29, 2009
    Assignee: Shenzhen Mindray Bio-Medical Electronics Co., Ltd.
    Inventors: Jian Cen, Xiaoyu Wu, Bo He
  • Publication number: 20090149763
    Abstract: The present invention relates to a device and a method for estimating central systolic blood pressure based on oscillometric signals from brachial artery by the use of a pressure cuff.
    Type: Application
    Filed: June 4, 2008
    Publication date: June 11, 2009
    Applicant: NATIONAL YANG-MING UNIVERSITY
    Inventors: CHEN-HUAN CHEN, HAO-MIM CHENG
  • Patent number: 7544167
    Abstract: A method and system for determining when to make a reversion to smaller cuff pressure steps during an oscillometric blood pressure measurement is disclosed. The method and system comprise comparing conformance of oscillometric envelope blood pressure data with previous blood pressure data, including measuring a shift between the oscillometric envelope blood pressure data and an oscillometric envelope derived from the previous blood pressure data. In addition, the method and system include making a reversion decision based on whether the shift exceeds an allowable threshold. Once a reversion decision is made a subsequent decision may be made as to the need for increasing the cuff pressure level.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: June 9, 2009
    Assignee: GE Medical Systems Information Technologies, Inc.
    Inventors: Lawrence T. Hersh, Richard Medero, Bruce A. Friedman, Sai Kolluri
  • Publication number: 20090137914
    Abstract: The present invention provides a portable hydraulic sphygmomanometer comprising: a manual hydraulic belt, a pressure sensor for detecting the pressure of hydraulic belt, and a compute device for calculating the blood pressure.
    Type: Application
    Filed: November 26, 2007
    Publication date: May 28, 2009
    Applicant: NATIONAL YANG-MING UNIVERSITY
    Inventor: Shuenn-Tsong Young
  • Patent number: 7530954
    Abstract: A rising cuff pressure detects the diastolic blood pressure and continues to rise to generate a pulse amplitude profile. The systolic blood pressure is determined by a computation using data from the profile to discriminate against the contribution of a hardened artery, without requiring the cuff pressure to exceed the systolic blood pressure.
    Type: Grant
    Filed: September 8, 2005
    Date of Patent: May 12, 2009
    Assignee: The Vlahos Family Trust
    Inventor: Petro Vlahos
  • Publication number: 20090112104
    Abstract: A method of calculating a blood pressure, includes: providing a non-invasive blood pressure measurement apparatus which includes a cuff being inflatable and deflatable and adapted to be fitted on a part of a living body and in which a plurality of calculation methods each of which has priority in accordance with a type of noise information are set; detecting, by the cuff, a signal waveform representing a change in an oscillation amplitude and a change in a cuff pressure; determining the type of the noise information contained in the detected signal waveform; deciding the blood pressure from at least one candidate value for the blood pressure, which is calculated by one of the calculation methods that has the priority with respect to the determined type of the noise information; and displaying the decided blood pressure,
    Type: Application
    Filed: October 31, 2008
    Publication date: April 30, 2009
    Applicant: Nihon Kohden Corporation
    Inventors: Takashi Usuda, Sunao Takeda
  • Publication number: 20090105600
    Abstract: A device for non-invasive measurement of blood pressure includes a blood pressure cuff, a plethysmographic electrode for acquiring an impedance plethysmogram distal to the cuff and a processing device to inflate and deflate the cuff generate the impedance plethysmogram and to determine the systolic and diastolic blood pressures. The device can be used to measure systolic or diastolic blood pressure or both. It can also be used to take ankle-brachial measurements. An autocorrelation technique can be used to correct noise.
    Type: Application
    Filed: October 19, 2007
    Publication date: April 23, 2009
    Inventors: Lloyd Marks, Michael Smith
  • Patent number: 7520859
    Abstract: A blood pressure measuring apparatus to measure blood pressure based on a change in a pressure by a cuff mounted to a subject comprises: cuff pressure controlling means for deflating the cuff after avascularization by the cuff at a body part around which the cuff is placed; detecting means for detecting the change in a pressure by the cuff and outputting the detection as an electrical signal; extracting means for extracting a pulse wave signal from the electrical signal; and calculating means for calculating a systolic blood pressure value and a diastolic blood pressure value based on a relation between a change rate of an index value which is calculated by multiplying a maximum amplitude of each pulse of the pulse wave signal by the cuff pressure corresponding to the maximum amplitude and a predetermined value. The blood pressure measuring apparatus achieves a high-speed measurement while suppressing the reduction of accuracy.
    Type: Grant
    Filed: March 13, 2006
    Date of Patent: April 21, 2009
    Assignee: Fukuda Denshi Co., Ltd.
    Inventor: Tomohiro Nunome
  • Publication number: 20090099466
    Abstract: A method for identifying a non-invasive blood pressure cuff type is disclosed herein. The method includes inflating a cuff and obtaining a first pressure measurement in a non-invasive blood pressure system while inflating the cuff. The method also includes obtaining a second pressure measurement in the non-invasive blood pressure system while inflating the cuff and identifying a cuff type based on the first pressure measurement and the second pressure measurement. A corresponding blood pressure monitoring system is also provided.
    Type: Application
    Filed: October 16, 2007
    Publication date: April 16, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Jose N. Wong, Richard Medero, Grady W. Argo
  • Publication number: 20090076398
    Abstract: A blood pressure measurement system is configured to perform a calibration automatically when a calibration condition is satisfied. The calibration condition is based upon one or more parameters of pulse waves of a subject. The parameters may include pulse wave area; a time difference between systolic peak and reflected wave peak or dichrotic notch in the pulse wave and a shape of at least a portion of the pulse wave.
    Type: Application
    Filed: November 21, 2008
    Publication date: March 19, 2009
    Applicant: Nellcor Puritan Bennett Ireland
    Inventors: Luya Li, Rakesh Kumar Sethi, Ming Sun, Alexander Yuk Sit, Yong Liu
  • Publication number: 20090043214
    Abstract: In a sphygmomanometer (1), a measurement value in a blood pressure measurement unit (16) and a measurement time are corresponded and stored in a blood pressure storage unit (17). When a measurement data process program is executed in CPU (11), the measurement value is extracted from the blood pressure storage unit based on a time the program is executed. The extracted measurement values in a plurality of measurement dates are integrated, and are used for a process of calculating a blood pressure average value for every period of time, and a process for obtaining a blood pressure variation curve.
    Type: Application
    Filed: March 22, 2007
    Publication date: February 12, 2009
    Applicant: OMRON HEALTHCARE Co., Ltd.
    Inventor: Osamu Shirasaki
  • Publication number: 20080319329
    Abstract: A manual-driven inflation-powered electronic blood pressure measuring apparatus includes an inflation unit to generate pressurized air by a user through hand squeezing, a power generation unit to receive the pressurized air to generate and output electric power, an electronic blood pressure measurement unit to receive the electric power output from the power generation unit and the pressurized air from the inflation unit to inflate an air pouch, and a sensor to detect a person's blood pressure signals in cooperation with the inflation pouch, and outputs a measurement result through an output unit.
    Type: Application
    Filed: June 25, 2007
    Publication date: December 25, 2008
    Inventor: Daniel C.M. Tseng
  • Publication number: 20080319328
    Abstract: A femoral compression device (1) for compressive bearing against the femoral artery of a patient, comprising a base plate (2), an inflatable air cushion (4), and an electronic manometer (8) connected to the inflatable air cushion for measurement of the current pressure difference between the pressure prevailing inside the inflatable air cushion and the ambient air pressure. The femoral compression device can further comprise a mechanical device (11; 46) which prevents an air opening leading to the inflatable air cushion from being closed before the manometer is zeroed.
    Type: Application
    Filed: June 22, 2007
    Publication date: December 25, 2008
    Inventors: Dan AKERFELDT, Leif Smith, Marie Lindstrom, Tobias Adenmark
  • Patent number: 7465273
    Abstract: A system and method for monitoring and estimating the blood pressure of a pregnant patient that modifies the blood pressure estimating algorithm when the patient is pre-eclamptic. The level of carbon monoxide within a patient's bloodstream or exhaled breath can be analyzed to determine whether a pregnant patient is pre-eclamptic. After the patient has been diagnosed as pre-eclamptic, the NIBP monitoring system adjusts its algorithm for estimating the patient's blood pressure to compensate for the physical changes that occur in the patient during pre-eclampsia. The adjusted blood pressure estimates calculated by the NIBP monitoring system can be calculated using different adjustment techniques and methods and are displayed on the NIBP monitor.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: December 16, 2008
    Assignee: The General Electric Company
    Inventor: Bruce A. Friedman
  • Patent number: 7462152
    Abstract: A method and system for operating a non-invasive blood pressure monitor that utilizes an SpO2 plethysmographic signal to reduce the time required to obtain an estimation of a patient's blood pressure. During operation of the NIBP monitor, the NIBP monitor utilizes the SpO2 plethysmographic signal to determine a timing period and a deflation period for each pulse associated with the patient's heartbeat. Upon receiving an oscillation pulse, the NIBP monitor determines the oscillation amplitude during the timing period and deflates the blood pressure cuff during the deflation period immediately following the timing period. Preferably, the deflation period occurs during the same oscillation pulse used to calculate the oscillation pulse amplitude to decrease the amount of time required to obtain a blood pressure estimate from the patient.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: December 9, 2008
    Assignee: The General Electric Company
    Inventors: Sai Kolluri, Lawrence T. Hersh, Richard Medero, Heather Menshouse
  • Publication number: 20080300495
    Abstract: A method of eliminating vibration interferences of a sphygmomanometer for measuring blood pressure uses a pressure sensor and an acceleration sensor to measure a voltage-time variation waveform of blood pressure detected by an acceleration sensor. An interference variation waveform is subtracted from the measured voltage-time variation waveform to calculate the correct blood pressure value. During measurement, the acceleration sensor detects and determines whether the vibration interference falls within a predetermined allowable range; if yes, a warning signal is issued to remind users to measure blood pressure again; if no, the acceleration sensor detects an interference variation waveform.
    Type: Application
    Filed: May 29, 2007
    Publication date: December 4, 2008
    Applicant: HEALTH & LIFE CO., LTD
    Inventors: Paul Yang, Jung-Chi Chang
  • Patent number: 7455643
    Abstract: A blood pressure measurement system is configured to perform a calibration automatically when a calibration condition is satisfied. The calibration condition is based upon one or more parameters of pulse waves of a subject. The parameters may include pulse wave area; a time difference between systolic peak and reflected wave peak or dichrotic notch in the pulse wave and a shape of at least a portion of the pulse wave.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: November 25, 2008
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: Luya Li, Rakesh Kumar Sethi, Ming Sun, Alexander Yuk Sit, Yong Liu
  • Publication number: 20080243011
    Abstract: The blood pressure monitor 100 includes plural case members 111 to 116 that are rotatably connected with one another to form a housing unit housing a cuff. The plural case members 111 to 116 are connected with plural torque hinges 140 or plural rotation hinges 150, and rotate to be transformed between a closed state in which the case members 111 to 116 are collapsed with the cuff housed herein, and an open state in which the case members 111 to 116 are opened.
    Type: Application
    Filed: March 31, 2008
    Publication date: October 2, 2008
    Applicant: CITIZEN HOLDINGS CO., LTD.
    Inventor: Fumihisa HORI
  • Publication number: 20080243008
    Abstract: To provide a technique which makes it possible to obtain a proper pulse wave signal for high-accuracy blood pressure measurements, thereby saving the trouble of taking measurements repeatedly and reducing a physical burden imposed on the user by cuff pressure.
    Type: Application
    Filed: October 3, 2005
    Publication date: October 2, 2008
    Applicants: TERUMO KABUSHIKI KAISHA, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yoshiyuki Habu, Kouji Hagi, Hitoshi Ozawa, Kimihisa Aihara, Naoe Tatara, Shinji Mino, Hiroshi Koizumi
  • Publication number: 20080243009
    Abstract: The present application discloses a method of calculating an initial inflation pressure during a blood pressure determination using an NIB system. The cuff provided with the system is inflated towards a default initial inflation pressure and a plurality of oscillometric pulses are obtained during inflation. A quick systolic pressure is estimated from a pre-defined function having a physiologically- expected shape of an oscillometric envelope fitted to oscillometric data obtained during the inflation. In an embodiment, the parameters within the function are specifically found by fitting a plurality of oscillometric pulse amplitudes along with their corresponding cuff pressures obtained during inflation to the pre-defined function. The cuff is inflated up to a calculated initial inflation pressure, which is found from the estimated quick systolic pressure.
    Type: Application
    Filed: March 30, 2007
    Publication date: October 2, 2008
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Lawrence T. Hersh, Sai Kolluri, Bruce Friedman, Richard Medero
  • Patent number: 7429245
    Abstract: The invention is in one embodiment an apparatus and a method for measuring the blood pressure of a vertebrate subject. The apparatus uses an inflatable chamber with a sensor to detect signals indicative of a blood pressure of the subject during an inflation interval of the inflatable chamber. If secondary motion or artifact signals are detected, the apparatus and method determine whether the secondary signals are below a predetermined value, and if so, complete the measurement. If the signals indicate that the measurement is not accurate, the system and method immediately institute a measurement of the blood pressure during a deflation interval, which can include a step deflation interval. In the event that the subject is identified as a neonate, the system and method immediately measure using the deflation interval procedure.
    Type: Grant
    Filed: July 14, 2003
    Date of Patent: September 30, 2008
    Assignee: Welch Allyn, Inc.
    Inventors: Ty Whitaker, Stephen C. Wilson, Knut Spang, Thaddeus J. Wawro, John A. Lane
  • Patent number: 7390302
    Abstract: A method and system for operating a non-invasive blood pressure monitor that utilizes an SpO2 plethysmograph signal to determine the initial inflation pressure for the blood pressure cuff of the NIBP monitor. A pulse sensor is placed on the patient's limb distal to the blood pressure cuff such that as the blood pressure cuff is inflated, the pulse signals from the pulse sensor will be reduced. When the blood pressure cuff reaches systolic pressure, the pulse signals from the pulse sensor will be initially attenuated and eventually eliminated, thus providing an indication that the cuff pressure has reached systolic pressure for the patient. The central processor of the NIBP monitor compares the pulse signals during cuff inflation to an average pulse signal and terminates the inflation of the blood pressure cuff upon sufficient attenuation.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: June 24, 2008
    Assignee: The General Electric Company
    Inventors: Bruce A. Friedman, John W. Booth, Lawrence T. Hersh
  • Patent number: 7390301
    Abstract: A method for the continuous non-invasive measurement of blood pressure includes at least one first pressure cuff and one second pressure cuff of comparable or identical size, each cuff including an inflatable pressure measuring chamber applicable to a first and a second body part or region containing an artery. The first pressure cuff has a first plethysmographic sensor connected to a regulating and control device used to regulate the pressure in a first pressure measuring chamber by means of a measuring signal of the plethysmographic sensor. The first pressure measuring chamber is connected to a pressure sensor in order to obtain a pressure measuring signal. The second pressure measuring chamber is a reference pressure chamber that can be regulated at the same time as the first pressure measuring chamber, independently therefrom, and can be regulated by the regulating and control device according to a pre-determinable pressure function.
    Type: Grant
    Filed: April 1, 2004
    Date of Patent: June 24, 2008
    Assignee: Cnsystems Medizintechnik GmbH
    Inventors: Falko Skrabal, J├╝rgen Fortin
  • Publication number: 20080146949
    Abstract: A blood pressure manometer comprises a body and a separate display, and the body and separate display are provided with first and second communication parts, respectively. The first communication part has a light emitting element and is configured so that the element sends an infrared signal including blood pressure data. The second communication part has a light receiving element and is configured so that the light receiving element receives the infrared signal including the blood pressure data from the first communication part. The light emitting element is supported by the body to be opposite a subject even if a blood pressure measuring portion of the body measures the subject's blood pressure from any of the subject's left and right regions. The light receiving element is supported by the separate display to received the infrared signal which is sent from the light emitting element to be reflected on the subject.
    Type: Application
    Filed: December 13, 2007
    Publication date: June 19, 2008
    Inventors: Takeshi Kojima, Tsuyoshi Yuasa, Shinichi Fumuro, Yoshitoshi Kanetsuna
  • Patent number: 7361148
    Abstract: A subject evaluation value measuring apparatus 10, functioning as a cuff volumetric pulse wave obtaining apparatus, includes a pulse wave determining device (i.e., a cuff volumetric pulse wave determining device) 52 that determines, using an inverse transfer function 1H(f), stored in a ROM (i.e., an inverse transfer function memory) 42, that corresponds to a pre-determined transfer function H(f) between input, i.e., pressure pulsation produced in a cuff 20, and output, i.e., pressure pulsation detected by a pressure sensor 24, a no-delay cuff volumetric pulse wave PK(t) having substantially no delay of transmission, based on an actual cuff pulse wave signal SM outputted by the pressure sensor 24. The thus determined cuff volumetric pulse wave PK(t) is free of waveform distortion and accordingly enjoys high accuracy.
    Type: Grant
    Filed: January 14, 2004
    Date of Patent: April 22, 2008
    Assignee: Colin Medical Techology Corporation
    Inventor: Kiyoyuki Narimatsu
  • Patent number: 7344503
    Abstract: A system and method for monitoring and estimating the blood pressure of a pregnant patient that modifies the blood pressure estimating algorithm when the patient is pre-eclamptic. The level of carbon monoxide within a patient's bloodstream or exhaled breath can be analyzed to determine whether a pregnant patient is pre-eclamptic. After the patient has been diagnosed as pre-eclamptic, the NIBP monitoring system adjusts its algorithm for estimating the patient's blood pressure to compensate for the physical changes that occur in the patient during pre-eclampsia. The adjusted blood pressure estimates calculated by the NIBP monitoring system can be calculated using different adjustment techniques and methods and are displayed on the NIBP monitor.
    Type: Grant
    Filed: April 3, 2006
    Date of Patent: March 18, 2008
    Assignee: The General Electric Company
    Inventor: Bruce A. Friedman
  • Patent number: 7341561
    Abstract: A wrist-worn apparatus capable of sensing pulsation of blood in the blood tubes of a user's wrist with high accuracy. The apparatus comprises a body of the apparatus, a band to be used to wear the body of the apparatus on the user's wrist, and a fluid-containing pulsation-sensing fluid chamber provided on the user's wrist side of the case. A part of an outer wall that defines the fluid chamber comprises an elastically deformable member that is elastically deformed depending on pulsation of blood transmitted from the band to thereby change the fluid pressure within the fluid chamber. A deformation preventing member is bonded by vulcanization to a part of a side of the deformable member that will come into contact with the user's wrist for preventing the part of the deformable member from being elastically deformed.
    Type: Grant
    Filed: May 24, 2004
    Date of Patent: March 11, 2008
    Assignee: Casio Computer Co., Ltd.
    Inventors: Shinichi Tanaka, Yoshiyuki Murata
  • Patent number: 7316651
    Abstract: The present invention discloses a method for automatically calibrating an electronic sphygmomanometer, which pumps air at a predetermined air pressure to a testing electronic sphygmomanometer to simultaneously pressurize a set of pressure sensors set for regular use and at least one other set of pressure sensors being interconnected in the electronic sphygmomanometer to detect whether or not the set of pressure sensors used at regular time is normal. The detected change of pressure during the detection is sent to a control module, and the control module will compare the detected value of each pressure sensor. If the comparison is matched, then it means that the set of pressure sensors used at regular time is normal; if the comparison is mismatched, then the pressure sensors are determined as abnormal and the air valve connected to such pressure sensors is shut, such that when a user uses the electronic sphygmomanometer for the next time, another set of pressure sensors will be started.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: January 8, 2008
    Assignee: Health & Life Co., Ltd.
    Inventors: Paul Yang, Pin-Hsuan Hung
  • Patent number: 7311669
    Abstract: A method and system for eliminating artifacts in an oscillation envelope are disclosed. The method and system comprise evaluating conformance of the oscillometric envelope blood pressure data with a predetermined expected pattern and excluding one or more data points of the oscillometric envelope blood pressure data based on non-conformance with the expected pattern. The expected pattern is based upon generally known physiological principles relating to oscillometric envelopes, a curve fit representing an oscillometric envelope from a previous determination, or other types of criteria.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: December 25, 2007
    Assignee: GE Medical Systems Information Technologies, Inc.
    Inventors: Sai Kolluri, Lawrence T. Hersh, Richard Medero
  • Patent number: 7270636
    Abstract: An apparatus and method for pulse detection based on blood pressure measuring stage is disclosed. Both monitoring of blood pressure and blood vessel pulse are integrated and applied to an apparatus. With the components of the blood pressure monitor, such as an inflatable cuff an air pump and a variable flow valve, with a unique sequential pressure control of reduction and regulation of pressure, not only can blood pressure parameters but also pulse signals under various pressures be measured to provide a complete analysis of blood artery/vessel conditions.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: September 18, 2007
    Assignee: DailyCare BioMedical Inc.
    Inventors: Kang-Ping Lin, Hong-Dun Lin, Bor-Iuan Jan, Mei-Feng Chen
  • Patent number: 7264594
    Abstract: The cardiovascular evaluation apparatus of the present invention maintains a pulse wave detection means for detecting pulse wave generated while external pressure is applied to the artery, a pulse wave pattern formulation means for formulating a pulse wave amplitude pattern that indicates the dependency characteristic of the pulse wave amplitude in regard to said external pressure, a pattern shape matching means for matching general polyangular patterns to a pattern portion of said pulse wave amplitude pattern that includes at least a part of the envelope curve where the area of the general pattern, and an index derivation means for deriving a cardiovascular dynamics index related to arterial mechanical characteristics and/or cardiac function.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: September 4, 2007
    Assignee: Osachi Co., Ltd.
    Inventors: Hideaki Shimazu, Yasuyuki Yaguchi
  • Patent number: 7251596
    Abstract: The present invention provides a unique wave-trigon transformation (WTT) method for performing transformation process over a wave signal. The present invention also provides a pitch detecting method and apparatus for detecting pitch based on the WTT process as well as a sentence detecting method and apparatus for detecting a sentence in a sound signal based on the WTT process. The pitch detecting method and apparatus can effectively detect pitch in a sound signal. In the WTT process, an inputted wave signal (such as a sound signal) is transformed into a series of trigons, and an energy-width spectrum is formed using these trigons. For a sound signal containing voice, the distribution of trigons transformed from the sound signal has a certain pattern. By analyzing the pattern, whether a pitch is contained in the sound signal can be determined. In particular, existence of a pitch can be determined by determining and evaluating the periodicity of trigons in a candidate chained peak in the energy-width spectrum.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: July 31, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Lianshan Zhu, Tao Yu
  • Patent number: 7232412
    Abstract: A blood pressure measuring apparatus oppresses blood vessels of a human body by an inflating unit through a cuff. When the blood vessels are oppressed through the cuff, a pulse wave superposed on a cuff pressure signal through a cuff pressure detector is detected by a pulse wave detector. The waveform of the detected pulse wave changes similarly to changes of pressure in the oppressed blood vessels in one heartbeat period. The information of the detected pulse wave waveform and the cuff pressure at this time are stored in a memory.
    Type: Grant
    Filed: December 3, 2003
    Date of Patent: June 19, 2007
    Assignee: Omron Healthcare Co., Ltd.
    Inventors: Osamu Shirasaki, Takeshi Kubo
  • Patent number: 7226419
    Abstract: A method is provided for blood pressure measurement by means of an inflatable cuff (50) applied to a limb of a vertebrate and pneumatically coupled to a first port (112A) and a second port (112B) of a blood pressure measurement apparatus (100). A pump (160) coupled to the second port inflates the cuff pneumatically. During an initial cuff inflation period, a first pressure sensor (180) pneumatically coupled to the first port senses a first pressure and a second pressure sensor (182) pneumatically coupled to the second port senses a second pressure. An analysis module (142) compares the magnitude of the first pressure to the magnitude of the second pressure to determine the relative relationship between the respective magnitudes of the first pressure and the second pressure.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: June 5, 2007
    Assignee: Welch Allyn, Inc.
    Inventors: John A. Lane, David E. Quinn, Craig M. Meyerson, Tyson B. Whitaker
  • Patent number: 7226421
    Abstract: A method of operating a non-invasive blood pressure (NIBP) monitor that includes a blood pressure cuff and a pressure transducer. The method initially inflates the blood pressure cuff to a level above systolic pressure and begins to deflate the pressure cuff using a continuous or linear deflation technique. During the linear deflation of the pressure cuff, the oscillation pulses from the pressure transducer are obtained and compared to predicted pulse estimates. If the obtained oscillation pulses vary from the predicted pulse estimates, the linear deflation technique is interrupted and the pressure cuff is then deflated in a sequence of distinct pressure steps. During each pressure step, the oscillation pulses are obtained and the pressure cuff is not deflated to the next pressure step until the oscillation pulses correspond to each other.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: June 5, 2007
    Assignee: The General Electric Company
    Inventors: Lawrence T. Hersh, Sai Kolluri, Bruce A. Friedman, Richard Medero
  • Patent number: 7214192
    Abstract: A method of vascular testing includes inflating a cuff at a vascular location, controllably deflating the cuff, producing a pressure waveform while deflating the cuff, and producing an output representing a pressure at which blood flow returns, while deflating the cuff, based upon analysis of the pressure waveform. Further, a testing system for measuring vascular pressures according to the present invention includes a pressure applicator, a pressure sensor, and a diagnostic test unit. The pressure applicator is positionable along exterior portions of a human body for dynamically applying pressure to a desired vascular location. The pressure sensor is capable of detecting oscillations in a pressure at the pressure applicator.
    Type: Grant
    Filed: September 7, 2004
    Date of Patent: May 8, 2007
    Assignee: BioMedix, Inc.
    Inventors: Marius Poliac, Gary Warner Blanch, Victor Florin Glava, Daniel James Ince, Andrew Paul Karels, William Lee Rogers, John Alexander Romans, Michael Jerome Siers, Charles Fredrec Steaderman, Ricky Lee Grave
  • Patent number: 7204808
    Abstract: An apparatus, system and method for collecting non-invasive blood pressure readings from a patient is provided. A non-invasive blood pressure cuff is arranged to be worn about a wrist of a patient and to be operatively connected to a blood pressure monitor. Communication means are operatively connected to the blood pressure cuff the monitor and arranged to automatically communicate a parameter associated with the cuff to the monitor. The monitor is arranged to automatically adjust blood pressure algorithms based upon the parameter to enhance the accuracy of blood pressure readings.
    Type: Grant
    Filed: October 13, 2005
    Date of Patent: April 17, 2007
    Assignee: The General Electric Company
    Inventors: Bruce A. Friedman, John Booth, John P. Clemmons
  • Patent number: 7204809
    Abstract: A pressurizing apparatus and method for adjusting an optimal pressurizing rate according to a cuff of various lengths. The pressurizing method measures the pressure values at two reference points and time duration to calculate a pressurizing rate. A control adjustment routine to control an adjustment of the pressurizing rate is decided according the calculated pressurizing rate and at least one control condition. The pump is pressurized according to the adjustment of the pressurizing rate. A diastolic pressure value is measured and the pressurizing of the pump is kept to measure a systolic pressure value. Afterward, the pressurizing is stopped to prevent uncomfortable feeling of user caused by rapidly pressurizing and de-pressurizing process.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: April 17, 2007
    Assignee: Rossmax International Ltd.
    Inventor: Ching-Hsi Hung
  • Patent number: 7198604
    Abstract: A method and system for determining pulse rate of a patient are disclosed. The method and system include acquiring measured information for at least one pulse at a pressure step, determining and storing quality values for the at least one pulse at the pressure step, analyzing pulse matching criteria for the pressure step, and determining pulse rate based on the measured information, quality values, and pulse matching criteria.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: April 3, 2007
    Assignee: GE Medical Systems Information Technologies
    Inventors: Sai Kolluri, Lawrence T. Hersh, Richard Medero
  • Patent number: 7186218
    Abstract: A method and system for determining when to make a reversion to smaller cuff pressure steps during an oscillometric blood pressure measurement is disclosed. The method and system comprise comparing conformance of oscillometric envelope blood pressure data with previous blood pressure data, including measuring a shift between the oscillometric envelope blood pressure data and an oscillometric envelope derived from the previous blood pressure data. In addition, the method and system include making a reversion decision based on whether the shift exceeds an allowable threshold. Once a reversion decision is made a subsequent decision may be made as to the need for increasing the cuff pressure level.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: March 6, 2007
    Assignee: GE Medical Systems Information Technologies Inc.
    Inventors: Lawrence T. Hersh, Richard Medero, Bruce A. Friedman, Sai Kolluri
  • Patent number: 7166076
    Abstract: A vascular testing system includes a pressure applicator, a pressure source for generating fluid pressure at the pressure applicator; a variable orifice valve, and a valve control. The variable orifice valve is in fluid communication with the pressure applicator, and has an orifice size capable of dynamically changing. The valve control controls the variable orifice valve as a function of sensed pressure to produce substantially linear changes in pressure at the pressure applicator. Further, a method of vascular pressure measurement according to the present invention includes providing an applied pressure higher than a patient's systolic blood pressure at a vascular location, substantially linearly decreasing the applied pressure at the vascular location, and dynamically detecting vascular pressure oscillations at the vascular location as the applied pressure is decreased.
    Type: Grant
    Filed: September 7, 2004
    Date of Patent: January 23, 2007
    Assignee: BioMedix, Inc.
    Inventors: Marius Poliac, Gary Warner Blanch, Victor Florin Glava, Daniel James Ince, Andrew Paul Karels, William Lee Rogers, John Alexander Romans, Michael Jerome Siers, Charles Fredrec Steaderman, Ricky Lee Grave
  • Patent number: 7153269
    Abstract: A method of operating a blood pressure measurement system that utilizes a non-invasive blood pressure (NIBP) monitor having a blood pressure cuff. During operation of the NIBP monitor, the blood pressure cuff is initially inflated. During the initial inflation, at least one pressure transducer monitors for the presence of oscillometric pulses and creates an oscillation signal. The oscillation signal is filtered and provided to a central processor. The central processor monitors for oscillometric pulses within the filtered signal and estimates a diastolic pressure and a systolic pressure for the patient. The estimated systolic and diastolic measurements taken during the initial inflation of the blood pressure cuff are used by the central processor to set a target inflation pressure and control the deflation of the blood pressure cuff from the initial inflation pressure.
    Type: Grant
    Filed: January 5, 2006
    Date of Patent: December 26, 2006
    Assignee: The General Electric Company
    Inventor: Robert L. Blansett
  • Patent number: 7153270
    Abstract: A device for securing a living body by pressing includes a living body pressing air bag, a curled elastic member of an approximately cylindrical shape, disposed on the outside of the living body pressing air bag and changeable in size in a radial direction, and a curled elastic member pressing air bag, disposed on the outside of the curled elastic member and inflated to press an outer peripheral surface of the curled elastic member inward to reduce a diameter of the curled elastic member, to thereby press the living body pressing air bag against the living body via the curled elastic member. This can provide a living body pressing and securing device provided with a novel automatic cuff winding mechanism that can simplify and downsize the winding mechanism, hardly causes skin tension on the body surface, and ensures uniform winding strength over the entire surface of the pressed site.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: December 26, 2006
    Assignee: Omron Healthcare Co., Ltd.
    Inventors: Yoshihiko Sano, Minoru Taniguchi, Takahide Tanaka, Takefumi Nakanishi, Tomonori Inoue, Hiroya Nakanishi, Yukiya Sawanoi
  • Patent number: 7074192
    Abstract: A technique for comparing pressure oscillations obtained during a blood pressure determination wherein two or more sets of matching criteria may be employed. The set of matching criteria to be employed is determined based on the heart rate variability or the presence of heart beat irregularities or arrhythmias as determined by an independent heart monitor, such as an ECG. The selected set of matching criteria may then be employed in determining the acceptability of the time interval between two oscillations and the equivalence of the two oscillations based upon one or more oscillation characteristics, such as peak amplitude. In this manner, non-consecutive oscillations may be matched and used in determining blood pressure.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: July 11, 2006
    Assignee: GE Medical Systems Information Technologies, Inc.
    Inventors: Bruce Arnold Friedman, Richard Medero, Lawrence T. Hersh, Sai Kolluri