WO2006016688A1 - 電子血圧計の脈波データ補正装置、電子血圧計、電子血圧計の脈波データ補正方法、電子血圧計の制御方法、プログラムおよび記録媒体 - Google Patents
電子血圧計の脈波データ補正装置、電子血圧計、電子血圧計の脈波データ補正方法、電子血圧計の制御方法、プログラムおよび記録媒体 Download PDFInfo
- Publication number
- WO2006016688A1 WO2006016688A1 PCT/JP2005/014874 JP2005014874W WO2006016688A1 WO 2006016688 A1 WO2006016688 A1 WO 2006016688A1 JP 2005014874 W JP2005014874 W JP 2005014874W WO 2006016688 A1 WO2006016688 A1 WO 2006016688A1
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- WIPO (PCT)
- Prior art keywords
- envelope
- time
- memory
- pulse wave
- differential signal
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000012937 correction Methods 0.000 title claims abstract description 17
- 230000001174 ascending effect Effects 0.000 claims abstract description 25
- 230000036772 blood pressure Effects 0.000 claims description 33
- 238000004364 calculation method Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 10
- 230000035488 systolic blood pressure Effects 0.000 claims description 10
- 230000004069 differentiation Effects 0.000 claims description 7
- 230000035487 diastolic blood pressure Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 13
- 210000004204 blood vessel Anatomy 0.000 description 20
- 230000008859 change Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 11
- 238000005070 sampling Methods 0.000 description 7
- 230000006793 arrhythmia Effects 0.000 description 4
- 206010003119 arrhythmia Diseases 0.000 description 4
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 101100328887 Caenorhabditis elegans col-34 gene Proteins 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 230000008707 rearrangement Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000000004 hemodynamic effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 210000004231 tunica media Anatomy 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
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
- A61B5/0225—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers the pressure being controlled by electric signals, e.g. derived from Korotkoff sounds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—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
- A61B5/02108—Measuring pressure in heart or blood vessels from analysis of pulse wave characteristics
- A61B5/02116—Measuring pressure in heart or blood vessels from analysis of pulse wave characteristics of pulse wave amplitude
-
- 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
Definitions
- Electronic blood pressure monitor pulse wave data correction apparatus electronic blood pressure monitor, electronic blood pressure monitor pulse wave data correction method, electronic blood pressure monitor control method, program, and recording medium
- the present invention relates to an electronic blood pressure monitor or a hemodynamic measurement type blood pressure monitor.
- the pulse wave pattern is smoothed by smoothing the pulse wave amplitude value by moving average (see, for example, Patent Document 1).
- the time series data of the output data F (P n) with respect to the time series discrete input data P n is simply subjected to a moving average and smoothed.
- FIG. 4 is a characteristic diagram showing an example of the relationship between the pressure difference inside and outside the blood vessel and the change in blood vessel volume. From the point where the intravascular pressure exceeds the external pressure (cuff pressure) (the part marked as “abrupt change” in FIG. 4), the volume of the blood vessel rapidly expands. The reason for the rapid change in the volume of the blood vessel is that the vascular media is highly extensible. Furthermore, when the internal / external pressure difference is increased, the volume does not change much because the change in the volume of the blood vessel is limited by the outer vascular membrane of the fiber.
- FIG. 5 is a diagram showing the relationship between the pressure difference inside and outside the blood vessel shown in FIG. 4 and the differential value of the change in blood vessel volume.
- FIG. 6 is a diagram showing an example of an actual pulse wave pattern.
- the actual pulse wave (solid line) shown in Fig. 6 is an uneven pattern compared to the ideal characteristics indicated by the dotted line.
- the pattern created based on the actual measurement values is uneven as described above because the blood pressure itself fluctuates with time and the cuff pressure changes due to body movements.
- Patent Document 1 Japanese Patent Laid-Open No. 5-3 1 7 2 7 4 [Disclosure of the Invention]
- FIG. 7 is a diagram showing an example in the case where a blood pressure value is erroneously determined in the conventional example. In a state where the adjacent pulse wave amplitude fluctuates greatly and the pattern is deformed, as shown in FIG.
- the constant ratio (30% in the figure) of the peak value of the pulse wave amplitude value is the systolic blood pressure value.
- the blood pressure value is first determined to be the maximum blood pressure when the judgment value (30%) is exceeded.
- the judgment value (30%) is exceeded.
- the correction amount is determined only by the relationship between the adjacent numerical values, regardless of the inherent harm characteristics. Therefore, multiple peaks may remain after processing, as shown in Figure 7. In order to prevent the occurrence of these multiple peaks, it is necessary to smooth the surface sufficiently and to increase the number of moving average data.
- the present invention relates to an electronic blood pressure monitor pulse wave data correction apparatus, an electronic blood pressure monitor control method, a program, a recording medium, an electronic blood pressure monitor, and an electronic blood pressure, which can easily and reliably correct a pulse wave pattern measurement error.
- the purpose is to provide a method for correcting the total pulse wave, a program and a recording medium.
- the output data F (P n) Using the monotonic increase or decrease of the observed output data F (P n), the value of the output data F (P n) is corrected in the time axis direction.
- the measurement error of the pulse wave pattern is corrected by a simple algorithm of changing the order, there is an effect that the measurement error of the pulse wave pattern can be easily and reliably corrected.
- FIG. 1 is a block diagram showing an electronic sphygmomanometer 100 which is Embodiment 1 of the present invention.
- FIG. 2 is a flowchart showing the operation of the first embodiment.
- Figure 3 is a graph showing the relationship between the cuff pressure and the differential value of the change in blood vessel volume (observation data).
- FIG. 4 is a characteristic diagram showing an example of the relationship between the blood pressure inside and outside the blood vessel and the volume.
- FIG. 5 is a diagram showing the relationship between the pressure difference inside and outside the blood vessel shown in FIG. 4 and the differential value of the change in blood vessel volume.
- FIG. 6 is a diagram showing an example of an actual pulse wave pattern.
- FIG. 7 is a diagram showing an example in the case where a blood pressure value is erroneously determined in the conventional example.
- FIG. 1 is a block diagram showing an electronic sphygmomanometer 100 which is Embodiment 1 of the present invention.
- Electronic sphygmomanometer 1 0 0 includes cuff 1 1, pressurizing means 1 2, slow exhaust means 1 3, pressure detecting means 1 4, CPU 2 0, R OM 4 1 and R AM 4 2 And operating means 4 3, display means 5 1, printer 5 2, and external terminal 5 3.
- Cuff 1 1 is wrapped around the arm of the person being measured.
- the pressurizing unit 12 is a unit that pressurizes the cuff 11 to a predetermined pressure necessary for blood pressure measurement.
- Slow exhaust means 1 3 is means for gradually exhausting the pressure in the cuff 1 1 pressurized by the pressurizing means 1 2.
- Pressure detection means 1 4 includes a pressure transducer for detecting the pressure of the cuff 1 1. The pressure is converted into an electric signal (pulse) and output.
- the sampling means 15 counts the pressure detection means 14 and the electrical signals (pulses) from the pressure detection means 14 within a certain time, and repeats the above count periodically by the sampling signal, and the sampling value is AZD. It is a means to convert. Further, the cuff 11, the pressurizing means 12, the slow exhaust means 13, and the pressure detecting means 14 are connected by a flexible tube.
- the CPU 20 controls the entire electronic sphygmomanometer 100 and functionally cooperates with the program stored in the R0M 4 1 to differentiate the time differentiating means 2 1, Envelope calculation means 2 2, Envelope maximum value detection means 2 3, Ascending sort means 2 4, Descending order sorter means 2 5, Envelope formation means 2 6, Systolic blood pressure calculation means 2 7, A minimum blood pressure calculation means 28, a pulse rate calculation means 29, and an external output control means 30 are realized.
- ROM 4 1 is a memory that stores the program of the flowchart shown in FIG. 2 to be described later.
- RAM 4 2 is a memory that stores the calculation results of the CPU 20, etc. It has a predetermined function key.
- pressurizing means 12, the slow exhaust means 13, the pressure detecting means 14, and the sampling means 15 are controlled by C P U 20.
- the time differentiation means 21 is a means for obtaining a time differentiation signal by time differentiation of a signal in which a pulse wave amplitude component is superimposed on the cuff pressure.
- the envelope calculation means 22 takes cuff pressure on one axis of the XY coordinates, takes the time differential signal differentiated by the differentiation means on the other axis of the XY coordinate axes, and This is a means for plotting the maximum value for each heartbeat and calculating the envelope connecting the plotted maximum values.
- the envelope maximum value detection means 23 detects the maximum value of the calculated envelope.
- the ascending sort means 24 sorts (reorders) the time differential signals calculated above, which are generated before the maximum envelope value, in ascending order.
- the descending order sorting means 25 sorts (sorts) the time differential signals generated after the above-described calculated time differential signals in descending order after the envelope maximum value.
- Envelope forming means 26 is composed of the ascending order sorting means and the descending order sorting means. —Forms the envelope of the distorted time derivative signal.
- the systolic blood pressure calculating means 27 is a means for calculating the systolic blood pressure, based on the envelope of the formed time differential signal.
- the diastolic blood pressure calculating means 28 is means for calculating the diastolic blood pressure, based on the envelope of the formed time differential signal.
- the pulse rate calculating means 29 is means for calculating the pulse rate based on the peak time interval in the envelope of the formed time differential signal.
- the external output control means 30 includes the maximum blood pressure calculated by the maximum blood pressure calculation means 27, the minimum blood pressure calculated by the minimum blood pressure calculation means 28, and the pulse rate calculated by the pulse rate calculation means 29 by the CPU 2 Means for outputting to the outside of 0.
- the display device 51 is a device that displays the calculated systolic blood pressure, diastolic blood pressure, and pulse rate.
- the printer 52 is a device that prints the calculated systolic blood pressure, diastolic blood pressure, and pulse rate.
- FIG. 2 is a flowchart showing the operation of the first embodiment.
- cuff pressurization is started (S l), and when the cuff pressure becomes equal to the upper limit pressure (S 2), the pressurization is terminated (S 3). Then, the sampling value of the cuff pressure is stored in the RAM 4 2 (S 4). When the cuff pressure becomes lower than the lower limit pressure (S 5), the sampling of the cuff pressure and the storage of the sampling value are finished. (S6).
- the discrete value of blood vessel volume change (pulse wave amplitude) to be obtained has the property that if the blood pressure does not fluctuate during measurement, it should increase monotonically and then decrease monotonically after passing the peak. have.
- the unevenness occurs because the value of the horizontal axis (blood pressure-cuff pressure) in FIG. 6 is actually different from the true value due to changes in blood pressure, body movement, and the like. Therefore, when correcting the obtained pulse wave pattern, it can be considered that the fluctuation of the output value (vertical axis) is caused by the change of the input value (horizontal axis).
- Figure 3 is a graph showing the relationship (observation data) between the cuff pressure and the differential value of the change in blood vessel volume.
- Fig. 3 (1) shows the observed data.
- the envelope E of the differential signal connecting the peak values of the differential signal is indicated by a broken line.
- FIG. 3 (2) is a diagram showing the envelope E ′ after the rearrangement of the differential signals by a broken line in the embodiment.
- Fig. 3 (3) the envelope of the differential signal is shown by a broken line based on the moving average of the observation data shown in Fig. 3 (1) in the conventional example.
- Fig. 3 (3) multiple peaks remain. There is one peak between times t6 and t7, and another peak between times T9 and T10.
- the pulse wave pattern obtained in this way has a single peak characteristic with a single peak value, as shown in Fig. 3 (2).
- waveform correction can be realized by executing simple logic (sorting in ascending order, sorting in descending order).
- the differential values of the blood vessel volume change at times t 2 and t 3 are interchanged with each other, and the differential values of the blood vessel volume change at times t 4 and t 5 are interchanged with each other.
- the differential values of the changes in blood vessel volume at t9 must be interchanged with each other, and it is considered that the blood vessel volume change fluctuates by that amount. Can be estimated. In other words, it can be said that the greater the number of replacements of “the differential value of the blood vessel volume change” and the greater the movement amount in FIG. This makes it possible to accurately evaluate the reliability of the measurement system and the appearance of arrhythmia.
- fluctuation during measurement can be absorbed, so that blood pressure during exercise can be accurately measured.
- the measurement error of the pulse wave pattern can be easily and surely corrected by a simple weighting that changes the order. Furthermore, according to the first embodiment, the measured value of the pulse wave pattern can be corrected regardless of the cause of the noise component.
- mathematical accuracy of measurement accuracy can be verified by defining a probability density function of noise.
- blood pressure measurement using the oscillometric method deteriorates the accuracy due to heart rate variability, and is a harm that can estimate the measurement accuracy of blood pressure measurement based on the frequency and size of the rearrangement.
- the true maximum value is determined by one of the following methods.
- a time differentiating means for obtaining a time differentiated signal by time differentiating a signal in which a pulse wave amplitude component is superimposed on the cuff pressure, an envelope calculating means for calculating an envelope of the time differentiated signal, Envelope maximum value detecting means for detecting the maximum value of the calculated envelope, and the calculated time differential signal, the time differential signal generated before the maximum envelope value in ascending order.
- Ascending sort means for sorting into Of the time differential signal sorted by the descending order sorting means, the ascending order sorting means, and the descending order sorting means.
- An electronic sphygmomanometer having an envelope forming means for forming an envelope.
- the above embodiment can be grasped as a program invention. That is, in the above embodiment, the output data F (P n) for the discrete input data P n in time series is observed and stored in the memory, and the output data F (P n) This is an example of a program that causes a computer to execute the correction procedure of correcting the value of the output data F (P n) using the monotonic increase or decrease of the output data and storing the value in the memory.
- the time differential procedure is obtained by time-dividing the signal in which the pulse wave amplitude component is superimposed on the cuff pressure to obtain the time differential signal and storing it in the memory, and the envelope of the time differential signal is calculated.
- the time differential signal generated before the line maximum value is sorted in ascending order and stored in the memory, and the time differential signal calculated above is the calculated time differential signal after the envelope maximum value.
- the generated time differential signal is sorted in descending order and stored in the memory, and the envelope of the time differential signal sorted by the descending sort procedure, the ascending sort procedure, and the descending sort procedure is formed.
- the envelope forming procedure is an example of a program executed by the Konbyu Isseki.
- the above programs may be recorded on a recording medium such as FD, CD, DVD, or semiconductor memory.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Cardiology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Physiology (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Vascular Medicine (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
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- Ophthalmology & Optometry (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Psychiatry (AREA)
- Signal Processing (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/659,859 US20070270698A1 (en) | 2004-08-12 | 2005-08-09 | Pulse Wave Data Corrector of Electronic Hemomanometer, Electronic Hemomanometer, Method of Correcting Pulse Wave Data of Electronic Hemomanometer, Method of Controlling the Electronic Hemomanometer, Program |
US13/152,167 US8652055B2 (en) | 2004-08-12 | 2011-06-02 | Electronic hemomanometer, method of correcting pulse wave data of electronic hemomanometer, program for causing a computer to execute procedures and computer-readable recording medium |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004235267A JP4646195B2 (ja) | 2004-08-12 | 2004-08-12 | 電子血圧計、電子血圧計の脈波データ補正方法、プログラムおよび記録媒体 |
JP2004/235267 | 2004-08-12 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/659,859 A-371-Of-International US20070270698A1 (en) | 2004-08-12 | 2005-08-09 | Pulse Wave Data Corrector of Electronic Hemomanometer, Electronic Hemomanometer, Method of Correcting Pulse Wave Data of Electronic Hemomanometer, Method of Controlling the Electronic Hemomanometer, Program |
US13/152,167 Division US8652055B2 (en) | 2004-08-12 | 2011-06-02 | Electronic hemomanometer, method of correcting pulse wave data of electronic hemomanometer, program for causing a computer to execute procedures and computer-readable recording medium |
Publications (1)
Publication Number | Publication Date |
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WO2006016688A1 true WO2006016688A1 (ja) | 2006-02-16 |
Family
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Family Applications (1)
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PCT/JP2005/014874 WO2006016688A1 (ja) | 2004-08-12 | 2005-08-09 | 電子血圧計の脈波データ補正装置、電子血圧計、電子血圧計の脈波データ補正方法、電子血圧計の制御方法、プログラムおよび記録媒体 |
Country Status (3)
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US (2) | US20070270698A1 (ja) |
JP (1) | JP4646195B2 (ja) |
WO (1) | WO2006016688A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112426141A (zh) * | 2020-12-09 | 2021-03-02 | 深圳市汇顶科技股份有限公司 | 血压检测方法、装置以及电子设备 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5208150B2 (ja) * | 2010-03-26 | 2013-06-12 | シチズンホールディングス株式会社 | 電子血圧計 |
KR101480904B1 (ko) * | 2013-09-25 | 2015-01-13 | 한국전자통신연구원 | 부채널 분석을 위한 파형 선택 장치 및 방법 |
KR102441331B1 (ko) | 2017-07-25 | 2022-09-06 | 삼성전자주식회사 | 생체 신호 특징점 검출 장치 및 방법 |
KR20210061595A (ko) | 2019-11-20 | 2021-05-28 | 삼성전자주식회사 | 오실로메트리 포락선의 특징점 검출 장치 및 방법과, 생체정보 추정 장치 |
Citations (3)
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JPS6272317A (ja) * | 1985-07-05 | 1987-04-02 | クリテイコン・インコ−ポレイテツド | 自動血圧計 |
JPS63286135A (ja) * | 1987-05-19 | 1988-11-22 | Omron Tateisi Electronics Co | 電子血圧計 |
JPH0889485A (ja) * | 1994-07-26 | 1996-04-09 | Nippon Koden Corp | 血圧測定装置 |
Family Cites Families (10)
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US4638810A (en) * | 1985-07-05 | 1987-01-27 | Critikon, Inc. | Automated diastolic blood pressure monitor with data enhancement |
US5014714A (en) * | 1989-07-19 | 1991-05-14 | Spacelabs, Inc. | Method and apparatus for distinguishing between accurate and inaccurate blood pressure measurements in the presence of artifact |
US5054494A (en) * | 1989-12-26 | 1991-10-08 | U.S. Medical Corporation | Oscillometric blood pressure device |
JPH04285530A (ja) * | 1991-03-14 | 1992-10-09 | Omron Corp | 波形判別装置 |
JPH05317274A (ja) | 1992-05-18 | 1993-12-03 | Omron Corp | 電子血圧計 |
US5699807A (en) * | 1994-07-26 | 1997-12-23 | Nihon Kohden Corporation | Blood pressure measuring system |
JP3521654B2 (ja) * | 1996-11-07 | 2004-04-19 | セイコーエプソン株式会社 | 脈拍計 |
JP2003284696A (ja) * | 2002-03-28 | 2003-10-07 | Omron Corp | 電子血圧計および電子血圧計の血圧測定方法 |
US6893403B2 (en) * | 2003-02-25 | 2005-05-17 | Ge Medical Systems Information Technologies, Inc. | Oscillometric determination of blood pressure |
US7198604B2 (en) * | 2003-03-18 | 2007-04-03 | Ge Medical Systems Information Technologies | Method and system for determination of pulse rate |
-
2004
- 2004-08-12 JP JP2004235267A patent/JP4646195B2/ja active Active
-
2005
- 2005-08-09 WO PCT/JP2005/014874 patent/WO2006016688A1/ja active Application Filing
- 2005-08-09 US US11/659,859 patent/US20070270698A1/en not_active Abandoned
-
2011
- 2011-06-02 US US13/152,167 patent/US8652055B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6272317A (ja) * | 1985-07-05 | 1987-04-02 | クリテイコン・インコ−ポレイテツド | 自動血圧計 |
JPS63286135A (ja) * | 1987-05-19 | 1988-11-22 | Omron Tateisi Electronics Co | 電子血圧計 |
JPH0889485A (ja) * | 1994-07-26 | 1996-04-09 | Nippon Koden Corp | 血圧測定装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112426141A (zh) * | 2020-12-09 | 2021-03-02 | 深圳市汇顶科技股份有限公司 | 血压检测方法、装置以及电子设备 |
CN112426141B (zh) * | 2020-12-09 | 2024-03-22 | 深圳市汇顶科技股份有限公司 | 血压检测装置以及电子设备 |
Also Published As
Publication number | Publication date |
---|---|
US20070270698A1 (en) | 2007-11-22 |
US8652055B2 (en) | 2014-02-18 |
JP4646195B2 (ja) | 2011-03-09 |
JP2006051197A (ja) | 2006-02-23 |
US20110237964A1 (en) | 2011-09-29 |
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