WO1997049332A1 - Manchon de sphygmomanometre - Google Patents

Manchon de sphygmomanometre Download PDF

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Publication number
WO1997049332A1
WO1997049332A1 PCT/JP1996/001751 JP9601751W WO9749332A1 WO 1997049332 A1 WO1997049332 A1 WO 1997049332A1 JP 9601751 W JP9601751 W JP 9601751W WO 9749332 A1 WO9749332 A1 WO 9749332A1
Authority
WO
WIPO (PCT)
Prior art keywords
cuff
air bag
blood pressure
bag
pressure
Prior art date
Application number
PCT/JP1996/001751
Other languages
English (en)
Japanese (ja)
Inventor
Osamu Tochikubo
Shigehiro Ishizuka
Original Assignee
A & D Co., Ltd.
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
Priority to JP09330195A priority Critical patent/JP3529886B2/ja
Application filed by A & D Co., Ltd. filed Critical A & D Co., Ltd.
Priority to US08/793,336 priority patent/US5840037A/en
Priority to PCT/JP1996/001751 priority patent/WO1997049332A1/fr
Publication of WO1997049332A1 publication Critical patent/WO1997049332A1/fr

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 pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • 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
    • A61B5/02233—Occluders specially adapted therefor

Definitions

  • the present invention relates to a cuff for a sphygmomanometer, and more particularly to a cuff used for a non-invasive sphygmomanometer.
  • a non-invasive electronic sphygmomanometer that winds a cuff that presses an artery on the upper arm of a subject is known.
  • the blood pressure determination method of this type of sphygmomanometer includes an oscillometric method, a Korotkoff sound method, and an impedance method. Oscillometric methods have become the mainstream for clinical applications.
  • a sphygmomanometer that employs such an oscillometric blood pressure determination method is disclosed, for example, in Japanese Patent Publication No. Hei 6-28663.
  • the sphygmomanometer disclosed in this publication has a cuff that is attached to the upper arm of a subject and has an air bag for injecting air and compressing an artery, and a pressure drop and a pulse that change in the air bag of the cuff.
  • a pressure sensor that detects the superimposed pressure with the pressure, a measurement unit that converts the detection value of this pressure sensor into a digital signal, and a cuff pressure detection signal output by this measurement unit as an input signal.
  • the digital data processing unit for obtaining the values and the display unit for displaying the maximum and minimum blood pressure values calculated by the digital data processing unit have a basic configuration.
  • the digital data processing unit determines the maximum and minimum blood pressure from the change in the amplitude of the pulse pressure oscillation in the process of lowering the pressure in the cuff ⁇
  • the oscillometric method The cuff used in the blood pressure determination method according to the method has the following problems. That is, in the method of determining blood pressure, a method of capturing a local area of the subject's artery and measuring the lateral pressure of the blood vessel wall is ideal, as typified by intraarterial catheterization.
  • the cause is that the blood pressure determination method in the oscillometric method detects the average pulsation of the artery in the cuff, and the pulsation is caused by the displacement of the arterial wall of the brachial artery caused by the heartbeat. This is propagated as a displacement of the skin surface, and the displacement of the skin surface changes the air volume in the air bag of the cuff, and this volume change is detected as a pressure change in the cuff, and as a result, It converts the displacement of the arterial wall into a pressure change in the cuff.
  • the amount of displacement of the arterial wall is measured using the air in the air bag of the cuff as a medium.
  • the resulting pulse pressure waveform could not accurately capture arterial wall displacement.
  • the cuff is wound around a wide range of the brachial artery, which is the measurement site of the subject, and the pulse pressure wave vibration is measured within the cuff pressure. Since the detection was performed by changing the pressure, it did not accurately reflect the local arterial pressure of the arterial wall, which is ideal for the blood pressure determination method. Pressure waves appear, and pulse pressure waves are propagated using air as a medium.Therefore, there are disadvantages such as being affected by frequency propagation due to the compressibility and damping characteristics of air, which hinders the propagation of Korotkoff sounds. Had occurred.
  • the present invention has been made in view of such conventional problems, and an object thereof is to enable accurate blood pressure determination by directly measuring a local displacement of an arterial wall. Another object of the present invention is to provide a cuff for a blood pressure monitor. Disclosure of the invention
  • the present invention provides a sphygmomanometer cuff, which is attached to a main part of a subject and inflates an artery by injecting air, held between inner and outer cloths sewn to each other.
  • the optical distance sensor may include a reflector provided inside the air bag and a light receiving and emitting element provided outside the air bag.
  • the optical distance sensor may include a pair of light receiving and light emitting elements, one of the elements being provided inside the air bag, and the other being provided outside the air bag. it can.
  • the air bag can be composed of a transparent bag and a lattice-like reinforcing fiber integrally incorporated in the bag.
  • FIG. 1 is a development view showing an embodiment of a cuff for a sphygmomanometer according to the present invention.
  • FIG. 2 is a cross-sectional view of a main part of the cuff for a sphygmomanometer according to the present invention
  • FIG. 3 is a block diagram of a configuration of a sphygmomanometer to which the cuff according to the present invention is applied
  • FIG. 4 is a cuff for the sphygmomanometer of FIG.
  • FIG. 7 is a waveform diagram illustrating an example of a detected pulse wave.
  • FIG. 1 and 2 show one embodiment of a cuff for a sphygmomanometer according to the present invention.
  • FIG. 3 shows an example of a blood pressure monitor to which the cuff 10 of the present invention is applied.
  • the sphygmomanometer shown in the figure includes a cuff 10, an optical distance sensor 12, and a digital data processing unit.
  • the cuff 10 is attached to the main part of the subject, specifically, the upper arm 16, and the details are shown in FIGS.
  • the cuff 10 shown in the figure is formed by bending a thin synthetic resin into an arc shape, and is capable of bending and deforming a hard curved plate 10a, and an outer cloth 10 surrounding the outer periphery of the curved plate 10a.
  • An inner cloth 10 c sewn to the outer cloth ⁇ 0 b so as to surround the inner circumference of the curved plate 10 a, and an air bag 10 d provided on the inner surface side of the inner cloth 10 c, Locking fastener 1 sewn on the outer circumference of outer cloth 10b to lock the end of inner cloth 10c
  • the air bag 10d is made up of a sealed transparent synthetic resin sheet bag 1 Og in which reinforcing fibers 10f are incorporated in a lattice shape. In order to prevent elongation during pulsation during pressurization and pulsation of bag 1 O g, reinforcing fiber 10 f is integrated into bag 1 O g.
  • the bag 10 g When injecting air into the bag 10 g through the pipe 18 described later and inflating it, the bag 10 g can be inflated in proportion to the amount of air injected.
  • a pipe 18 for injecting air is connected in communication.
  • a pressure sensor 20 and an electromagnetic control valve 22 are connected to an outer end of the pipe 18.
  • a pump 24 for sending air is connected to the electromagnetic control valve 22, and the electromagnetic control valve 22 and the pump 24 are controlled by a pump control unit 26.
  • the detection signal of the pressure sensor 20 is input to the digital data processing unit 14 via the band bus filter 28 and the A / D converter 30.
  • a control signal is sent from the digital data processing unit 14 to the pump control unit 26 based on the detection signal of the pressure sensor 20.
  • the optical distance sensor 12 includes a photocabra 12 a fixed to the outer surface of the outer portion of the bag 1 Og, and an outer surface of the inner portion of the bag 10 g facing the photocabra 12 a. And a reflection plate 12b fixed to the base plate.
  • the photo cab 12a is a combination of a light emitting diode and a phototransistor, and the light emitted from the light emitting diode is reflected by the reflector 12b to form a photo transistor.
  • the output signal of the phototransistor is different according to the distance between the photomask 12a and the reflector 12b, and the output signal corresponding to the displacement of the artery is set. Sent out.
  • the light-emitting diode of the photomask 12a is connected to the digital data processor 14
  • the on / off of the light emission control unit 32 is controlled.
  • a digital data processing unit 14 is connected to the phototransistor 12a via a photopath filter 34 and an A / D converter 36, and the transistor detection signal is digitized. Input to the processing unit 14.
  • the bag 10 g is made of a transparent synthetic resin sheet, the photocobra 12 a and the reflection plate 12 b are arranged on the outer surface thereof. If the bag 1 Og is formed of a resin sheet, the photokabura 12 a and the reflector 12 b may be arranged on the inner surface side.
  • the optical distance sensor 12 employs not only the combination of the photo cab 12a and the reflector 12b but also the combination of the light emitting diode and the photo transistor.
  • the bag should be installed on the inner and outer surfaces of the 10 g so that they face each other.
  • the digital data processing unit 14 is composed of a so-called microcomputer, and includes a CPU, a memory, and the like.
  • the digital data processing unit 14 displays the maximum and minimum blood pressure values.
  • Display unit 38 is connected via the interface.
  • the cuff 10 When measuring blood pressure, first, the cuff 10 is worn on the upper arm 16 of the subject. At this time, it is set so that the reflector 12b is positioned on the artery of the upper arm 16, and the cloths 10b and 10c are hung and fixed to the locking fastener 10e.
  • the reflector 12b of any of the sensors 12 can be positioned on the artery.
  • the largest output signal is output by comparing the output values of each sensor 12. What is necessary is just to choose.
  • an output signal is sent from the digital data processing unit 14 to the electromagnetic control unit 22 to open the electromagnetic control valve 22. Then, the electromagnetic control valve 22 is controlled based on the detection signal of the pressure sensor 20 to perform a constant-speed pressure control for increasing the pressure in the air bag 10d of the cuff 10 at a constant speed.
  • the reinforcing fibers 10 f are incorporated in a lattice shape in the bag 10 g of the air bag 10 d, and an inelastic Since the curved plate 10a is interposed, the expansion and contraction of the bag 10d itself is regulated by the reinforcing fiber 10f, and the outward expansion of the bag 10d is suppressed by the curved plate 10d. It is regulated by a, and the displacement of the optical distance sensor 12 is prevented.
  • the detection signals transmitted from the optical distance sensor 12 are sequentially taken into the data processing unit 14. Since the output signal of the optical distance sensor 12 includes a portion corresponding to the inflation of the air bag 10d that is being pressurized at a constant speed, the photoelectric volume from which the portion corresponding to the pressurization at a constant speed is removed.
  • the pulse wave signal is calculated by the data processing unit 14, and the maximum and minimum blood pressures are determined based on this signal.
  • FIG. 4 shows an example of the photoelectric volume pulse wave signal.
  • An example of a method for determining the highest and lowest blood pressure based on the photoelectric volume pulse signal will be described.
  • the air bag If the pressure within 10 d is lower than the subject's diastolic blood pressure, the photoplethysmographic signal will pulsate without being affected by the pressure of the air bladder 10 d. P, ⁇ P S).
  • first flat portion s detects a photoelectric volume pulse signal P 7 was Ji raw determines diastolic blood pressure when the photoelectric volume pulse signal P 7 has been detected.
  • the pressure initially in the flat portion s air bag 1 0 at the time when the previous photoelectric volume pulse signal [rho beta is extracted photoelectric volume pulse wave signal P 7 expressed d or the diastolic blood pressure value, or the average value of the pressure in the photoelectric the volume pulse signal F and the photoelectric volume pulse signal P 6 is an air bag 1 O d of the time it is extracted with diastolic blood pressure.
  • the photoelectric volume pulse wave signal corresponds to Korotkoff sound. Since the high-speed displacement section K is generated, the high-speed displacement section K can detect the photoplethysmographic pulse wave signal that first appears, and determine the diastolic blood pressure value in the same manner as the flat section s. Further, by detecting both the flat portion s and the high-speed displacement portion K, the diastolic blood pressure value can be similarly obtained.
  • the point in time when the photoelectric volume pulse signal disappears is determined as systolic blood pressure.
  • the pressure in the air bladder 10 d is increased at a constant speed, if this pressure becomes larger than the systolic blood pressure value, the pulsation of the artery is suppressed by the pressure and the displacement of the optical distance sensor 12 is reduced.
  • the point in time when the photoelectric volume pulse signal is no longer detected is determined as the systolic blood pressure of the subject.
  • the optical distance sensor has an air bag 1 Od fixed on the inner peripheral side of 10 c and an optical distance sensor 12 opposed to the air bag 1 Od between the inside and the outside. 1
  • the local amount of displacement of the arterial wall is directly measured by the optical distance sensor, and the maximum value is determined based on the amount of displacement. Since the lowest blood pressure value is determined, it is suitable for cuffs used in non-invasive sphygmomanometers that can determine highly accurate maximum and minimum blood pressure values.

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

Abstract

Manchon de sphygmomanomètre capable d'estimer les pressions systolique et diastolique avec une grande précision. Le manchon (10) se compose d'une plaque rigide incurvée (10a), d'un élément textile extérieur (10b) entourant la plaque incurvée (10a) sur son pourtour extérieur, d'un élément textile intérieur (10c) cousu sur l'élément textile extérieur (10b) et entourant le pourtour intérieur de la plaque incurvée (10a), d'un coussinet gonflable (10d) placé sur le côté envers de l'élément textile intérieur (10c) et d'une attache (10e) fixée sur le pourtour extérieur de l'élément textile extérieur (10b). Le coussinet gonflable (10d) se compose d'un corps transparent (10g) contenant des fibres de renforcement (10f) incorporées de manière à former un treillis. Un détecteur de distance optique (12) se compose d'un photocoupleur (12a) fixé sur le côté du corps du coussinet (10g) et d'une plaque de réflexion (12b) fixée sur le côté intérieur dudit corps de coussinet (10g), à l'opposé du photocoupleur (12a). Le photocoupleur est équipé d'une diode émettrice de lumière et d'un phototransistor, la lumière émise par la diode réfléchie par la plaque de réflexion (12b) et tombe sur le phototransistor. La magnitude de la sortie du phototransistor varie selon la distance entre le photocoupleur (12a) et la plaque de réflexion.
PCT/JP1996/001751 1995-04-19 1996-06-25 Manchon de sphygmomanometre WO1997049332A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP09330195A JP3529886B2 (ja) 1995-04-19 1995-04-19 血圧計用カフ
US08/793,336 US5840037A (en) 1995-04-19 1996-06-25 Sphygmomanometer
PCT/JP1996/001751 WO1997049332A1 (fr) 1995-04-19 1996-06-25 Manchon de sphygmomanometre

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP09330195A JP3529886B2 (ja) 1995-04-19 1995-04-19 血圧計用カフ
PCT/JP1996/001751 WO1997049332A1 (fr) 1995-04-19 1996-06-25 Manchon de sphygmomanometre

Publications (1)

Publication Number Publication Date
WO1997049332A1 true WO1997049332A1 (fr) 1997-12-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1996/001751 WO1997049332A1 (fr) 1995-04-19 1996-06-25 Manchon de sphygmomanometre

Country Status (2)

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JP (1) JP3529886B2 (fr)
WO (1) WO1997049332A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000001296A1 (fr) * 1998-07-03 2000-01-13 Abatis Medical Technologies Limited Transducteur plan de mesure de pressions biomedicales
WO2006049571A1 (fr) * 2004-11-04 2006-05-11 Lindberg Lars-Goeran Procede et elements destines a mesurer la pression sanguine systolique dans la cheville

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101577342B1 (ko) 2009-05-07 2015-12-15 삼성전자주식회사 혈압 측정 장치 및 방법
JP5325817B2 (ja) * 2010-03-12 2013-10-23 日本電信電話株式会社 ユーザ端末装置
CN107157465B (zh) * 2017-06-15 2020-04-03 中国人民解放军总后勤部司令部管理保障局第一门诊部 血压随访记录装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0231734A (ja) * 1988-07-22 1990-02-01 Koorin Denshi Kk 圧脈波検出装置
JPH0535104U (ja) * 1991-10-16 1993-05-14 テルモ株式会社 光電容積脈波血圧計

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0231734A (ja) * 1988-07-22 1990-02-01 Koorin Denshi Kk 圧脈波検出装置
JPH0535104U (ja) * 1991-10-16 1993-05-14 テルモ株式会社 光電容積脈波血圧計

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000001296A1 (fr) * 1998-07-03 2000-01-13 Abatis Medical Technologies Limited Transducteur plan de mesure de pressions biomedicales
US6636760B1 (en) * 1998-07-03 2003-10-21 Vincent Casey Planar transducer for measuring biomedical pressures
WO2006049571A1 (fr) * 2004-11-04 2006-05-11 Lindberg Lars-Goeran Procede et elements destines a mesurer la pression sanguine systolique dans la cheville

Also Published As

Publication number Publication date
JP3529886B2 (ja) 2004-05-24
JPH08280639A (ja) 1996-10-29

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