WO2025182183A1 - 血圧測定装置、血圧測定方法及び血圧測定プログラム - Google Patents
血圧測定装置、血圧測定方法及び血圧測定プログラムInfo
- Publication number
- WO2025182183A1 WO2025182183A1 PCT/JP2024/040873 JP2024040873W WO2025182183A1 WO 2025182183 A1 WO2025182183 A1 WO 2025182183A1 JP 2024040873 W JP2024040873 W JP 2024040873W WO 2025182183 A1 WO2025182183 A1 WO 2025182183A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- cuff
- blood pressure
- constant
- wrapping strength
- 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.)
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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
- A61B5/02233—Occluders specially adapted therefor
-
- 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
- A61B5/0225—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 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
- A61B5/0235—Valves specially adapted therefor
-
- 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
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0247—Pressure sensors
-
- 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
- A61B5/02225—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers using the oscillometric method
Definitions
- the present invention relates to a blood pressure measurement device, a blood pressure measurement method, and a blood pressure measurement program.
- measuring devices to measure information about an individual's physical health, such as blood pressure, and then recording and analyzing the measurement results.
- a measuring device is a blood pressure monitor that attaches a cuff to the subject's upper arm, wrist, or other area to be measured, and is equipped with a function to determine the tightness of the cuff (see Patent Document 1).
- the initial inflation level cannot be set too low in order to ensure the time required to determine the cuff wrapping strength.
- the pressure pulse wave must be acquired immediately after determining the cuff wrapping strength in order to calculate blood pressure, noise generated when switching control could adversely affect the pressure pulse wave.
- the objective is to provide technology that can suppress the influence of noise when switching control from determining the cuff wrapping strength to calculating blood pressure.
- the present invention provides: a cuff that is wrapped around the part to be measured; a pressure detection unit that detects a cuff pressure in the cuff; a pressure control unit that controls the cuff pressure; a blood pressure calculation unit that performs a blood pressure calculation process to calculate the blood pressure of the subject based on the detected cuff pressure; a wrapping strength determination unit that performs a wrapping strength determination process to determine the wrapping strength of the cuff around the measurement target part; Equipped with The pressure control unit is performing constant pressure control to maintain the cuff pressure at a constant target pressure value from the start of increasing the cuff pressure until the end of the wrapping strength determination process, and performing constant speed inflation control to increase the cuff pressure at a constant speed in order to calculate the blood pressure after the end of the wrapping strength determination process; The winding strength determination unit
- the blood pressure measuring device is characterized in that the wrapping strength is determined during the constant pressure control.
- the winding strength determination unit The wrapping strength may be determined based on a change in the cuff pressure during a determination time period, which is the time period from the initial pressure until the cuff pressure reaches the target pressure value and stabilizes.
- the winding strength determination unit The wrapping strength may be determined by comparing the number of times the cuff pressure falls below the target pressure value during the determination time period and the difference from the target pressure value with predetermined threshold values.
- the winding strength determination unit The wrapping strength may be determined based on whether the cuff pressure increases or decreases relative to the target pressure value during the determination time period.
- the target pressure value may be less than 30 mmHg.
- the pressure control unit is The constant speed pressurization control may be performed depending on the result of the wrapping strength determination process.
- the pressure control unit is The constant pressure control may be performed by PID control.
- the pressure control unit is A pump for supplying air to the cuff and an exhaust valve for controlling exhaust from the cuff may be controlled.
- the present invention also provides detecting a cuff pressure in a cuff wrapped around the measurement target part; performing constant pressure control to maintain the cuff pressure at a constant target pressure value; a step of performing a wrapping strength determination process to determine a wrapping strength of the cuff around the measurement target portion during the constant pressure control; a step of performing a constant speed inflation control for increasing the cuff pressure at a constant speed after the wrapping strength determination process is completed; performing a blood pressure calculation process to calculate the blood pressure of the subject based on the cuff pressure during the constant velocity inflation control;
- the blood pressure measurement method is characterized by comprising:
- the present invention also provides On the computer, detecting a cuff pressure in a cuff wrapped around the measurement target part; performing constant pressure control to maintain the cuff pressure at a constant target pressure value; a step of performing a wrapping strength determination process to determine a wrapping strength of the cuff around the measurement target portion during the constant pressure control; a step of performing a constant speed inflation control for increasing the cuff pressure at a constant speed after the wrapping strength determination process is completed; performing a blood pressure calculation process to calculate the blood pressure of the subject based on the cuff pressure during the constant velocity inflation control;
- the blood pressure measurement program is characterized by executing the following.
- the influence of noise on the timing of switching control from determining the cuff wrapping strength to calculating blood pressure can be suppressed.
- FIG. 1 is a diagram illustrating an outline of a hardware configuration of a blood pressure measurement device according to a first embodiment.
- FIG. 2 is a functional block diagram of the blood pressure measurement device according to the first embodiment.
- FIG. 3 is a flowchart illustrating the overall processing procedure of the blood pressure measurement device according to the first embodiment.
- FIG. 4 is a graph showing changes over time in the cuff pressure and the pressure pulse wave when the blood pressure measurement device according to Example 1 is in use.
- FIG. 5 is a flowchart illustrating the procedure of the wrapping strength determination process of the blood pressure measurement device according to the first embodiment.
- FIG. 6 is a graph showing a variation pattern of the cuff pressure for each wrapping strength in the blood pressure measurement device according to Example 1.
- FIG. 7 is a diagram illustrating an outline of a hardware configuration of a blood pressure measurement device according to the second embodiment.
- Example 1 An example of an embodiment of the present invention will be described below. However, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the components described in this example are not intended to limit the scope of the present invention to those only.
- FIG. 1 is a schematic diagram of a hardware configuration of a blood pressure measurement device 1 according to this embodiment.
- the blood pressure measurement device 1 includes a cuff 11, a pressure sensor 12, a pressure pump 13, an exhaust valve 14, an air tube 15, an oscillator circuit 21, a pump drive circuit 22, a valve drive circuit 23, a display unit 25, a memory 24, an operation switch 26, a power supply 27, and a CPU 100.
- the blood pressure measurement device 1 corresponds to the blood pressure measurement device of the present invention.
- the cuff 11, the pressure pump 13, and the exhaust valve 14 correspond to the cuff, pump, and exhaust valve of the present invention, respectively.
- the cuff 11 includes an air bag 11a containing air.
- the cuff 11 is equipped with a pressure sensor 12 for detecting the pressure inside the air bag 11a of the cuff 11 (hereinafter referred to as "cuff pressure") via an air tube 15, a pressure pump 13 for supplying air to the air bag 11a, and an exhaust valve 14 that opens and closes to maintain the pressure inside the air bag 11a or to exhaust the air inside the air bag 11a.
- the blood pressure measuring device 1 is equipped with a CPU (Central Processing Unit) 100 for controlling each part of the device, a memory 24 for storing programs executed for the wrapping strength determination process and blood pressure measurement process described below, as well as data such as blood pressure measurement results, a display unit 25 for displaying various information such as the wrapping strength determination results and blood pressure measurement results, an operation switch 26 for inputting various instructions for measurement, and a power supply 27 for supplying power to each part of the device, such as the CPU.
- a CPU Central Processing Unit
- memory 24 for storing programs executed for the wrapping strength determination process and blood pressure measurement process described below, as well as data such as blood pressure measurement results
- a display unit 25 for displaying various information such as the wrapping strength determination results and blood pressure measurement results
- an operation switch 26 for inputting various instructions for measurement
- a power supply 27 for supplying power to each part of the device, such as the CPU.
- the oscillator circuit 21 outputs a signal with an oscillation frequency corresponding to the output value of the pressure sensor 12 to the CPU 100.
- the pump drive circuit 22 controls the drive of the pressure pump 13 based on a control signal output from the CPU 100.
- the valve drive circuit 23 controls the opening and closing of the exhaust valve 14 based on a control signal output from the CPU 100.
- FIG. 2 is a functional block diagram of the blood pressure measurement device 1.
- the CPU 100 includes a pressure detection unit 110, a pressure control unit 120, a blood pressure calculation unit 130, a condition determination unit 140, and a wrapping strength determination unit 150.
- the pressure detection unit 110, the pressure control unit 120, the blood pressure calculation unit 130, and the wrapping strength determination unit 150 correspond to the pressure detection unit, the pressure control unit, the blood pressure calculation unit, and the wrapping strength determination unit of the present invention, respectively.
- the output signal of the oscillator circuit 21 is input to the pressure detection unit 110.
- the pressure detection unit 110 detects the oscillation frequency of the input signal and converts the detected oscillation frequency into a pressure value signal.
- the pressure detection unit 110 includes an HPF (High Pass Filter) unit that applies HPF processing to the pressure value signal to extract and output a pressure pulse wave signal, and an LPF (Low Pass Filter) unit that applies LPF processing to the pressure value signal to extract and output a pressure absolute value signal.
- HPF High Pass Filter
- LPF Low Pass Filter
- the pressure control unit 120 controls the operation of the pump drive circuit 22 and the valve drive circuit 23 to control the cuff pressure of the cuff 11.
- a cuff pressure signal indicating the cuff pressure detected in time series from the LPF section of the pressure detection section 110 is input to the condition determination section 140. Based on the cuff pressure signal input in time series, the condition determination section 141 determines whether the conditions (determination conditions) for determining the wrapping strength are met.
- the wrapping strength determination unit 150 receives a cuff pressure signal indicating the cuff pressure detected in time series from the LPF unit of the pressure detection unit 110, and stores the input cuff pressure signal in a predetermined area of the memory 24. The wrapping strength determination unit 150 waits until the determination conditions are met, and then performs a wrapping strength determination, as described below, based on the cuff pressure signal read from the memory 24.
- Fig. 3 is a flowchart showing the overall processing procedure of the blood pressure measurement method using the blood pressure measurement device 1.
- the overall processing of blood pressure measurement shown in Fig. 3 is stored in advance as a program in a predetermined area of the memory 24, and is realized by the CPU 100 reading and executing the program from the memory 24.
- the program may be stored in a computer-readable storage medium and read from the storage medium into the blood pressure measurement device 1.
- Fig. 4 is a graph showing the time changes of the pressure pulse wave and cuff pressure detected during blood pressure measurement on the same time axis.
- the person being measured When measuring blood pressure, the person being measured will have already wrapped the cuff 11 around the part to be measured, such as the upper arm or wrist.
- the following explanation assumes that the person being measured has made the required settings using the operation switch 26 and given a command to start blood pressure measurement.
- the blood pressure measurement device 1 Upon receiving the command to start blood pressure measurement, the blood pressure measurement device 1 performs the required initialization, such as opening the exhaust valve 14 and setting the cuff pressure to atmospheric pressure (initial pressure).
- the pressure control unit 120 begins constant pressure control (step S1). At this time, the pressure control unit 120 controls the pump drive circuit 22 so that the cuff pressure detected by the pressure sensor 12 remains constant (referred to as "constant pressure control"), using the initial inflation end pressure, which is the cuff pressure at which the initial inflation ends, as the target pressure value.
- This constant pressure control can be performed using, for example, PID control, but the control method is not limited to this.
- the condition determination unit 140 monitors the cuff pressure detected by the pressure sensor 12 and determines whether the cuff pressure has reached the target pressure value and is stable (step S2). Whether the cuff pressure is stable can be determined, for example, based on whether the deviation of the cuff pressure from the target pressure value is within a range of ⁇ 5%, but the determination criteria are not limited to this.
- step S2 is repeated and the condition determination unit 140 continues to monitor the cuff pressure.
- the sampled cuff pressure is stored in a specified area of the memory 24 in association with sampling time information.
- step S2 the condition determination unit 140 determines that the cuff pressure has reached the target pressure value and is stable
- the wrapping strength determination unit 150 executes the wrapping strength determination process shown in FIG. 5 based on the time change information of the cuff pressure stored in memory 24 (step S3). In this way, the wrapping strength determination process is performed under constant pressure control.
- time P1 until Tc in Figure 4 corresponds to the time to be determined in the present invention.
- Time Tc corresponds to the end of the wrapping strength determination process.
- Figure 6 is a graph showing example patterns of cuff pressure change when the wrapping strength is determined to be loose, tight, or tight.
- Figure 6 shows an enlarged view of the area surrounded by the dashed line in Figure 4 showing changes in cuff pressure.
- the loose wrapping state the cuff pressure rises slowly when inflated and falls far below the target pressure, a so-called undershoot state, before reaching the target pressure.
- the tight wrapping state the cuff pressure rises sharply immediately after inflating begins and exceeds the target pressure, entering a so-called overshoot state, after which it repeatedly increases and decreases, oscillating above and below the target pressure before reaching the target pressure.
- the tight wrapping state the cuff pressure rises as inflating occurs, but does not exceed the target pressure, and quickly approaches the target pressure before reaching it.
- the wrapping strength determination unit 150 determines whether the number and amount of times the cuff pressure falls below the target pressure value before it reaches the target pressure value from the initial pressure are greater than a predetermined threshold (step S31).
- the amount of time the cuff pressure falls below the target pressure value is the magnitude of the difference between the target pressure value and the cuff pressure.
- step S31 if it is determined that the number of times and the amount by which the cuff pressure is below the target pressure value before the cuff pressure reaches the target pressure value are greater than a predetermined threshold, the wrapping strength is determined to be loose (step S32).
- step S31 if it is determined that the number of times and the amount by which the cuff pressure is below the target pressure value before the cuff pressure reaches the target pressure value are below a predetermined threshold, the wrapping strength determination unit 150 determines whether the pressure value increases or decreases relative to the target pressure value (step S33). In step S33, if the cuff pressure increases or decreases relative to the target pressure value before it reaches the target pressure value, it is determined that the wrapping strength is tight (step S34).
- step S33 if the cuff pressure does not increase or decrease relative to the target pressure value before it reaches the target pressure value, the wrapping strength is determined to be tight (step S35).
- step S5 If the wrapping strength determination in step S3 determines that the cuff is tightly wrapped, the initial pressurization using constant pressure control is terminated, and the pressure control unit 120 starts controlling the pump drive circuit 22 so that the cuff pressure increases at a constant rate (referred to as "constant rate inflation control") (step S5).
- the constant rate inflation control is executed at time P2 after Tc in Figure 4.
- the initial pressurization end pressure value (target pressure value) is set to, for example, around 10 mmHg, lower than the 30 mmHg that is a typical value for conventional constant voltage driving.
- the pump voltage (drive voltage of the pump drive circuit 22) is maintained in a balanced state under constant pressure control, and then the control is switched to constant-speed inflation control to begin acquiring a pressure pulse wave for blood pressure measurement. This prevents sudden changes in inflation speed, suppresses the effects of noise at the control switch timing, and enables clear pressure pulse wave changes to be acquired.
- the blood pressure calculation unit 130 acquires the pressure pulse wave for blood pressure measurement from the HPF unit of the pressure detection unit 110 using constant velocity inflation control, and performs blood pressure calculation processing to calculate blood pressure values such as systolic blood pressure and diastolic blood pressure using the oscillometric method (step S6).
- the CPU 100 displays the measurement results, such as the blood pressure value calculated in step S6, on the display unit 25 of the blood pressure measurement device 1 (step S7).
- the CPU 100 then records the measurement results, such as the blood pressure value calculated in step S6, in a predetermined area of the memory 24 of the blood pressure measurement device 1 (step S8), and ends the blood pressure measurement process.
- step S3 determines that the wrapping strength is not perfect, i.e., if it is determined that the wrapping is loose or tight
- the pressure control unit 12025 controls the valve drive circuit 23 to open the exhaust valve 14 and discharge air from the air bag 11a of the cuff 11 (step S9). Then, the CPU 100 displays an error on the display unit 25 (step S10) and ends the blood pressure measurement process.
- Example 2 6 is a block diagram showing an outline of the hardware configuration of a blood pressure measurement device 2 according to Example 2. Components common to those in the blood pressure measurement device 1 according to Example 1 are denoted by common reference numerals, and detailed description thereof will be omitted.
- the blood pressure measurement device 2 is equipped with a control valve 16 and a control valve drive circuit 28, and further equipped with a quick exhaust valve 17 and a quick exhaust valve drive circuit 30.
- the blood pressure measurement device 2 corresponds to the blood pressure measurement device of the present invention.
- the control valve 16 corresponds to the exhaust valve of the present invention.
- the control valve 16 is a valve whose opening degree can be continuously controlled, and the control valve drive circuit 28 controls the opening degree of the control valve 16 based on a control signal output from the CPU 100.
- the quick exhaust valve 17 is a valve that can rapidly exhaust air by opening the valve, immediately reducing the cuff pressure.
- the quick exhaust valve drive circuit 30 controls the opening and closing of the quick exhaust valve 17 based on a control signal output from the CPU 100.
- the pressure control unit 120 controls the operation of the pump drive circuit 22, the control valve drive circuit 28, and the quick exhaust valve drive circuit 29.
- control valve 16 Since it is difficult to precisely control the cuff pressure using the pressure pump 13, by combining it with a control valve 16 that allows for slow exhaust, constant pressure control at low pressures can be achieved in a shorter time. During constant pressure control, the control valve 16 is controlled to open and close, but during constant-speed inflation control, the control valve 16 is kept closed.
- the overall blood pressure measurement procedure including the wrapping strength determination process, is the same as that of the blood pressure measurement device 1 according to Example 1, and therefore will not be described further.
- the blood pressure measurement device 2 is equipped with a quick exhaust valve 17, which allows the cuff pressure to be reduced in a short time when venting, thereby reducing the burden on the person being measured.
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Abstract
Description
被測定部に巻き付けられるカフと、
前記カフ内のカフ圧を検出する圧力検出部と、
前記カフ圧を制御する圧力制御部と、
検出された前記カフ圧に基づいて被測定者の血圧を算出する血圧算出処理を行う血圧算出部と、
前記カフの前記被測定部への巻き付け強度を判定する巻き付け強度判定処理を行う巻き付け強度判定部と、
を備え、
前記圧力制御部は、
前記カフ圧の加圧を開始してから前記巻き付け強度判定処理を終了するまで、前記カフ圧を一定の目標圧値に維持しようとする圧力一定制御を行うとともに、前記巻き付け強度判定処理終了後に、前記血圧を算出するために前記カフ圧が等速で加圧される等速加圧制御を行い、
前記巻き付け強度判定部は、
前記圧力一定制御中に前記巻き付け強度を判定することを特徴とする血圧測定装置である。
前記巻き付け強度判定部は、
前記カフ圧が初期圧から前記目標圧値に到達し安定するまでの時間である判定対象時間における前記カフ圧の変化に基づいて前記巻き付け強度を判定するようにしてもよい。
前記巻き付け強度判定部は、
前記カフ圧が、前記判定対象時間中に前記目標圧値未満となる回数及び前記目標圧値に対する差分をそれぞれ所定の閾値と比較することにより、前記巻き付け強度を判定するようにしてもよい。
前記巻き付け強度判定部は、
前記カフ圧が、前記判定対象時間中に前記目標圧値に対して増減するか否かに基づいて、前記巻き付け強度を判定するようにしてもよい。
前記目標圧値は、30mmHgより小さいようにしてもよい。
前記圧力制御部は、
前記巻き付け強度判定処理の結果に応じて、前記等速加圧制御を行うようにしてもよい。
前記圧力制御部は、
PID制御により前記圧力一定制御を行うようにしてもよい。
前記圧力制御部は、
前記カフに空気を供給するポンプ及び前記カフからの排気を制御する排気弁を制御するようにしてもよい。
被測定部に巻き付けられるカフ内のカフ圧を検出するステップと、
前記カフ圧を一定の目標圧値に維持しようとする圧力一定制御を行うステップと、
前記圧力一定制御中に前記カフの前記被測定部への巻き付け強度を判定する巻き付け強度判定処理を行うステップと、
前記巻き付け強度判定処理終了後に、前記カフ圧を等速で加圧する等速加圧制御を行うステップと、
前記等速加圧制御中に、前記カフ圧に基づいて被測定者の血圧を算出する血圧算出処理を行うステップと、
を備えたことを特徴とする血圧測定方法である。
コンピュータに、
被測定部に巻き付けられるカフ内のカフ圧を検出するステップと、
前記カフ圧を一定の目標圧値に維持しようとする圧力一定制御を行うステップと、
前記圧力一定制御中に前記カフの前記被測定部への巻き付け強度を判定する巻き付け強度判定処理を行うステップと、
前記巻き付け強度判定処理終了後に、前記カフ圧を等速で加圧する等速加圧制御を行うステップと、
前記等速加圧制御中に、前記カフ圧に基づいて被測定者の血圧を算出する血圧算出処理を行うステップと、
を実行させることを特徴とする血圧測定プログラムである。
以下に、本発明の実施形態の一例について説明する。但し、この実施例に記載されている構成部品の寸法、材質、形状、その相対配置などは、特に記載がない限りは、この発明の範囲をそれらのみに限定する趣旨のものではない。
図1は、本実施例に係る血圧測定装置1のハードウェア構成の概略図である。
CPU100は、圧力検出部110、圧力制御部120、血圧算出部130、条件判断部140、巻き付け強度判定部150を備える。圧力検出部110、圧力制御部120、血圧算出部130及び巻き付け強度判定部150が、それぞれ本発明の圧力検出部、圧力制御部、血圧算出部及び巻き付け強度判定部に相当する。
図3は、血圧測定装置1による血圧測定方法の全体処理の手順を示すフローチャートである。図3に示す血圧測定の全体処理は、予めプログラムとしてメモリ24の所定領域に記憶されており、CPU100が当該プログラムをメモリ24から読み出して実行することによって実現される。当該プログラムは、コンピュータ読み取り可能な記憶媒体に記憶され、当該記憶媒体から血圧測定装置1に読み込まれたものであってもよい。図4は、血圧測定時において検出される圧脈波とカフ圧との時間変化を同じ時間軸で示したグラフである。
ステップS31において、カフ圧が目標圧値に到達するまでに、カフ圧が目標圧値未満である回数及び量が所定の閾値より大きいと判断された場合には、巻き付け強度はゆる巻きであると判断する(ステップS32)。
ステップS33において、カフ圧が目標圧値に到達するまでに、圧力値が目標圧値に対して増減する場合には、巻き付け強度はきつ巻きであると判断する(ステップS34)。
図6は、実施例2に係る血圧測定装置2のハードウェア構成の概略を示すブロック図である。実施例1に係る血圧測定装置1と共通の構成については、共通の符号を付して詳細な説明を省略する。
11・・・・カフ
110・・・圧力検出部
120・・・圧力制御部
130・・・血圧算出部
150・・・巻き付け強度判定部
Claims (10)
- 被測定部に巻き付けられるカフと、
前記カフ内のカフ圧を検出する圧力検出部と、
前記カフ圧を制御する圧力制御部と、
検出された前記カフ圧に基づいて被測定者の血圧を算出する血圧算出処理を行う血圧算出部と、
前記カフの前記被測定部への巻き付け強度を判定する巻き付け強度判定処理を行う巻き付け強度判定部と、
を備え、
前記圧力制御部は、
前記カフ圧の加圧を開始してから前記巻き付け強度判定処理を終了するまで、前記カフ圧を一定の目標圧値に維持しようとする圧力一定制御を行うとともに、前記巻き付け強度判定処理終了後に、前記血圧を算出するために前記カフ圧が等速で加圧される等速加圧制御を行い、
前記巻き付け強度判定部は、
前記圧力一定制御中に前記巻き付け強度を判定することを特徴とする血圧測定装置。 - 前記巻き付け強度判定部は、
前記カフ圧が初期圧から前記目標圧値に到達し安定するまでの時間である判定対象時間における前記カフ圧の変化に基づいて前記巻き付け強度を判定することを特徴とする請求項1に記載の血圧測定装置。 - 前記巻き付け強度判定部は、
前記カフ圧が、前記判定対象時間中に前記目標圧値未満となる回数及び前記目標圧値に対する差分をそれぞれ所定の閾値と比較することにより、前記巻き付け強度を判定することを特徴とする請求項2に記載の血圧測定装置。 - 前記巻き付け強度判定部は、
前記カフ圧が、前記判定対象時間中に前記目標圧値に対して増減するか否かに基づいて、前記巻き付け強度を判定することを特徴とする請求項2又は3に記載の血圧測定装置。 - 前記目標圧値は、30mmHgより小さいことを特徴とする請求項1又は2に記載の血圧測定装置。
- 前記圧力制御部は、
前記巻き付け強度判定処理の結果に応じて、前記等速加圧制御を行うことを特徴とする請求項1又は2に記載の血圧測定装置。 - 前記圧力制御部は、
PID制御により前記圧力一定制御を行う請求項1又は2に記載の血圧測定装置。 - 前記圧力制御部は、
前記カフに空気を供給するポンプ及び前記カフからの排気を制御する排気弁を制御することを特徴とする請求項1又は2に記載の血圧測定装置。 - 被測定部に巻き付けられるカフ内のカフ圧を検出するステップと、
前記カフ圧を一定の目標圧値に維持しようとする圧力一定制御を行うステップと、
前記圧力一定制御中に前記カフの前記被測定部への巻き付け強度を判定する巻き付け強度判定処理を行うステップと、
前記巻き付け強度判定処理終了後に、前記カフ圧を等速で加圧する等速加圧制御を行うステップと、
前記等速加圧制御中に、前記カフ圧に基づいて被測定者の血圧を算出する血圧算出処理を行うステップと、
を備えたことを特徴とする血圧測定方法。 - コンピュータに、
被測定部に巻き付けられるカフ内のカフ圧を検出するステップと、
前記カフ圧を一定の目標圧値に維持しようとする圧力一定制御を行うステップと、
前記圧力一定制御中に前記カフの前記被測定部への巻き付け強度を判定する巻き付け強度判定処理を行うステップと、
前記巻き付け強度判定処理終了後に、前記カフ圧を等速で加圧する等速加圧制御を行うステップと、
前記等速加圧制御中に、前記カフ圧に基づいて被測定者の血圧を算出する血圧算出処理を行うステップと、
を実行させることを特徴とする血圧測定プログラム。
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63189128A (ja) * | 1987-02-02 | 1988-08-04 | オムロン株式会社 | 電子血圧計 |
| WO2010089917A1 (ja) * | 2009-02-06 | 2010-08-12 | オムロンヘルスケア株式会社 | 測定部位に巻付けられるカフを有する血圧測定装置 |
| JP2013090824A (ja) * | 2011-10-26 | 2013-05-16 | Omron Healthcare Co Ltd | 電子血圧計 |
| JP2013236797A (ja) * | 2012-05-16 | 2013-11-28 | Omron Healthcare Co Ltd | 血圧測定装置 |
| JP2021078552A (ja) * | 2019-11-14 | 2021-05-27 | オムロンヘルスケア株式会社 | 血圧計、血圧測定方法、およびプログラム |
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- 2024-02-27 JP JP2024027771A patent/JP2025130539A/ja active Pending
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- 2024-11-18 DE DE112024002154.9T patent/DE112024002154T5/de active Pending
- 2024-11-18 CN CN202480048251.9A patent/CN121548374A/zh active Pending
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- 2026-01-20 US US19/453,570 patent/US20260144448A1/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63189128A (ja) * | 1987-02-02 | 1988-08-04 | オムロン株式会社 | 電子血圧計 |
| WO2010089917A1 (ja) * | 2009-02-06 | 2010-08-12 | オムロンヘルスケア株式会社 | 測定部位に巻付けられるカフを有する血圧測定装置 |
| JP2013090824A (ja) * | 2011-10-26 | 2013-05-16 | Omron Healthcare Co Ltd | 電子血圧計 |
| JP2013236797A (ja) * | 2012-05-16 | 2013-11-28 | Omron Healthcare Co Ltd | 血圧測定装置 |
| JP2021078552A (ja) * | 2019-11-14 | 2021-05-27 | オムロンヘルスケア株式会社 | 血圧計、血圧測定方法、およびプログラム |
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| US20260144448A1 (en) | 2026-05-28 |
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