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GB1460413A - Method of and apparautus for measuring blood pressure polyurethane elastomers - Google Patents

Method of and apparautus for measuring blood pressure polyurethane elastomers

Info

Publication number
GB1460413A
GB1460413A GB593475A GB593475A GB1460413A GB 1460413 A GB1460413 A GB 1460413A GB 593475 A GB593475 A GB 593475A GB 593475 A GB593475 A GB 593475A GB 1460413 A GB1460413 A GB 1460413A
Authority
GB
United Kingdom
Prior art keywords
pressure
coincidence circuit
signal
cuff
systolic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB593475A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AMBITEX CORP
CENDEV CORP
AMBITEX Co
Original Assignee
AMBITEX CORP
CENDEV CORP
AMBITEX Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AMBITEX CORP, CENDEV CORP, AMBITEX Co filed Critical AMBITEX CORP
Publication of GB1460413A publication Critical patent/GB1460413A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/021—Measuring pressure in heart or blood vessels
    • A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
    • A61B5/02208—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers using the Korotkoff method
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/021—Measuring pressure in heart or blood vessels
    • A61B5/02141—Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B7/00—Instruments for auscultation
    • A61B7/02—Stethoscopes
    • A61B7/04—Electric stethoscopes
    • A61B7/045—Detection of Korotkoff sounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7235—Details of waveform analysis
    • A61B5/7239—Details of waveform analysis using differentiation including higher order derivatives

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Cardiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Vascular Medicine (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Physiology (AREA)
  • Pathology (AREA)
  • Biophysics (AREA)
  • Acoustics & Sound (AREA)
  • Ophthalmology & Optometry (AREA)
  • Hematology (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

1460413 Measuring systolic and diastolic pressure AMBITEX CORP and CENDEV CORP [trading as AMBITEX CO] 12 Feb 1975 [19 Feb 1974] 5934/75 Heading G1N In an apparatus for measuring a patients' systolic and diastolic blood pressure two independent measurements of the patient's heart beat are taken using a pressure transducer 18 which measures the pressure inside a cuff 12, and a microphone 24 which senses the noises from the constricted blood flow downstream of the cuff. These signals are processed and supplied to a coincidence circuit 21. The pressure at the start and at the termination of the signal from the coincidence circuit 21 is measured (after the cuff 12 has been pumped up to stop the blood flow and while the pressure is allowed to decrease slowly). These two measurements correspond to the systolic and the diastolic pressure. The invention makes use of the pronounced acoustic pulses (Korotkoff sounds) that can be detected as the pressure in the cuff is slowly decreased. The sounds start when the systolic pressure is reached and die away at diastolic pressure. The pressure is supplied from a source 15 via a valve 14 that is controlled by a logic circuit 31, which also controls a valve 17 that allows the pressure to decrease. Initially the pressure is increased at a given rate for a set range, held for a given interval, and then the procedure is repeated. This is continued till no signals are detected by the transducers during two sucessive time intervals. Then the pressure is allowed to decrease slowly. The pressure transducer output is differentiated to provide a signal representing the heart beat. This signal is fed via a filter 20 and a threshold circuit B to the coincidence circuit 21. The coincidence circuit also receives the signal from the microphone which is connected via an acoustical conduit 22 to a small cup secured to the patient's arm as shown. The microphone's output signals is passed via a further filter 26 and a threshold circuit. The pressure transducer's signal is also fed via an A-D converter which supplies a display device that records and displays the pressure at the beginning of the pulses coming from the coincidence circuit 21 and at the finish of the pulses coming from the coincidence circuit 21.
GB593475A 1974-02-19 1975-02-12 Method of and apparautus for measuring blood pressure polyurethane elastomers Expired GB1460413A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US443442A US3905354A (en) 1974-02-19 1974-02-19 Blood pressure measuring system

Publications (1)

Publication Number Publication Date
GB1460413A true GB1460413A (en) 1977-01-06

Family

ID=23760820

Family Applications (1)

Application Number Title Priority Date Filing Date
GB593475A Expired GB1460413A (en) 1974-02-19 1975-02-12 Method of and apparautus for measuring blood pressure polyurethane elastomers

Country Status (6)

Country Link
US (1) US3905354A (en)
JP (1) JPS50118588A (en)
CA (1) CA1005563A (en)
DE (1) DE2506651A1 (en)
FR (1) FR2260975A1 (en)
GB (1) GB1460413A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406987A1 (en) * 1977-10-25 1979-05-25 Ivac Corp PERFECTION WITH AN ELECTRONIC SPHYGMOMANOMETER
DE3014199A1 (en) * 1980-02-18 1981-08-27 Asulab S.A., Bienne BLOOD PRESSURE MEASURING DEVICE
US4493326A (en) * 1979-10-03 1985-01-15 United States Surgical Corporation Automatic blood pressure system with servo controlled inflation and deflation
GB2165052A (en) * 1984-09-27 1986-04-03 Copal Takeda Medical Lab Inc Automatically measuring blood pressure

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026277A (en) * 1974-04-12 1977-05-31 Matsushita Electric Industrial Co., Ltd. Blood pressure measuring apparatus
US4005701A (en) * 1975-06-11 1977-02-01 Whittaker Corporation Noise rejecting electronic sphygmomanometer and methods for measuring blood pressure
US4058117A (en) * 1975-10-17 1977-11-15 Palo Alto Research Associates Blood pressure measuring apparatus
US4011860A (en) * 1975-10-20 1977-03-15 Filac Corporation Calibrated blood pressure measuring system and method
US4033336A (en) * 1975-11-19 1977-07-05 Medical Scientific International Corporation System for sensing and recording medical information
US4294261A (en) * 1976-06-01 1981-10-13 The United States Of America As Represented By The United States National Aeronautics And Space Administration Logic-controlled occlusive cuff system
FR2366000A1 (en) * 1976-07-30 1978-04-28 Grangirard Henri DEVICE FOR MEASURING CIRCULATORY PARAMETERS BY EXTERNAL ROUTE
US4367751A (en) * 1976-12-27 1983-01-11 Warner-Lambert Company Apparatus and process for producing artifact effect on sphygmometric information
US4188955A (en) * 1977-09-12 1980-02-19 Omron Tateisi Electronics Co. Blood pressure measuring process and apparatus
JPS5444378A (en) * 1977-09-14 1979-04-07 Omron Tateisi Electronics Co System of deciding minimum blood pressure in automatic blood pressure measuring device
JPS5470678A (en) * 1977-11-15 1979-06-06 Matsushita Electric Works Ltd Automatic digital hemadynamometer
JPS5482889A (en) * 1977-12-14 1979-07-02 Fujitsu Ltd Automatic blood pressure measuring system
HU176288B (en) * 1977-12-21 1981-01-28 Medicor Muevek Apparatos to determine blood-pressure, in the first place, of babies not in a invasive way
US4271843A (en) * 1978-10-10 1981-06-09 Flynn George J Method and apparatus for diastolic pressure measurement
US4295471A (en) * 1979-05-25 1981-10-20 Kaspari William J Non-invasive vascular waveform transducer and apparatus
US4252127A (en) * 1979-06-19 1981-02-24 Iowa State University Research Foundation Portable blood pressure recorder
JPS5623935A (en) * 1979-08-01 1981-03-06 Omron Tateisi Electronics Co Blood pressure measuring apparatus
US4328810A (en) * 1979-10-03 1982-05-11 United States Surgical Corporation Automatic blood pressure system
US4432373A (en) * 1980-02-19 1984-02-21 Omron Tateisi Electronics Company Electronic blood pressure measuring apparatus
US4312359A (en) * 1980-02-19 1982-01-26 Life Care Systems, Inc. Noninvasive blood pressure measuring system
JPS596654B2 (en) * 1980-08-25 1984-02-14 松下電工株式会社 electronic blood pressure monitor
JPS59501296A (en) * 1982-07-19 1984-07-26 ボメド・メディカル・マニユファクチャリング・リミテッド Non-invasive real-time blood pressure measurement system
FR2550083B1 (en) * 1983-08-03 1985-11-29 Berger Henri APPARATUS AND METHOD FOR MEASURING BLOOD PRESSURE USING AN INDIRECT METHOD
US4567899A (en) * 1984-07-30 1986-02-04 Healthcheck Corporation Cuff pressure controller for blood pressure measurement apparatus
FR2582122B3 (en) * 1985-05-17 1987-08-21 Wegmann Raymond DEVICE FOR AUTOMATIC MEASUREMENT OF BLOOD PRESSURE BY AUTONOMOUS MONITORING, COMPUTERIZED IN TRUE AMBULATORY
US4729382A (en) * 1986-09-02 1988-03-08 Schaffer John D Method and apparatus for automatically determining pulse rate and diastolic and systolic blood pressure
US4890625A (en) * 1988-03-24 1990-01-02 Spacelabs, Inc. Blood pressure cuff with integral acoustic pickup cup
US5054495A (en) * 1989-07-10 1991-10-08 Colin Electronics Co., Ltd. Automatic blood-pressure measuring apparatus
AT412702B (en) * 2003-10-21 2005-06-27 Cnsystems Medizintechnik Gmbh DEVICE AND METHOD FOR CONTROLLING THE PRESSURE IN AN INFLATABLE CUFF OF A BLOOD PRESSURE METER
US7438687B2 (en) * 2004-08-14 2008-10-21 Nova Technology Corporation Patient monitoring system with blood pressure measurement capacity
CN106725401B (en) * 2017-01-12 2020-01-17 成都信息工程大学 Stethoscope audio data processing method based on deep learning
EP3456252A1 (en) * 2017-09-14 2019-03-20 Koninklijke Philips N.V. Inflation apparatus for an inflation-based non-invasive blood pressure monitor and a method of operating the same

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126886A (en) * 1964-03-31 Automatic sphygmomanometer
US3508537A (en) * 1965-04-20 1970-04-28 Beckman Instruments Inc Method and apparatus for automatic blood pressure monitoring
DE1541128B2 (en) * 1966-07-29 1977-06-23 Hellige GmbH, 7800 Freiburg Elf: Streu, Benno, 7800 Freiburg BLOOD PRESSURE MONITOR WITH AUTOMATIC DETERMINATION OF DIASTOLIC AND SYSTOLIC BLOOD PRESSURE
US3552381A (en) * 1967-05-23 1971-01-05 Bell Telephone Labor Inc Sphygmomanometric method and apparatus
US3654915A (en) * 1969-12-19 1972-04-11 Del Mar Eng Lab Apparatus for automatically measuring and indicating blood pressure
US3779235A (en) * 1971-06-18 1973-12-18 Searle Medidata Inc Cardiovascular test station pressurometer interface system
US3814083A (en) * 1972-05-24 1974-06-04 Nasa Apparatus and method for processing korotkov sounds

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406987A1 (en) * 1977-10-25 1979-05-25 Ivac Corp PERFECTION WITH AN ELECTRONIC SPHYGMOMANOMETER
US4493326A (en) * 1979-10-03 1985-01-15 United States Surgical Corporation Automatic blood pressure system with servo controlled inflation and deflation
DE3014199A1 (en) * 1980-02-18 1981-08-27 Asulab S.A., Bienne BLOOD PRESSURE MEASURING DEVICE
GB2165052A (en) * 1984-09-27 1986-04-03 Copal Takeda Medical Lab Inc Automatically measuring blood pressure
US4660567A (en) * 1984-09-27 1987-04-28 Takeda Medical Company Limited Method of automatically measuring blood pressure, and apparatus therefor

Also Published As

Publication number Publication date
CA1005563A (en) 1977-02-15
US3905354A (en) 1975-09-16
DE2506651A1 (en) 1975-08-21
FR2260975A1 (en) 1975-09-12
JPS50118588A (en) 1975-09-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee