JPH079305U - Pulse wave velocity sphygmomanometer - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to measure blood pressure at all times, whether at rest or during exercise. [Structure] Utilizing the fact that the pulse wave velocity is inversely proportional to the change in blood pressure value, the blood pressure value is indirectly measured by detecting the electrocardiogram and the pulse wave and calculating the pulse wave velocity from these values. It is a pulse wave velocity sphygmomanometer. This sphygmomanometer is attached to the peripheral side of the human body (fingertips, ear tabs, etc.) and an electrocardiographic detection unit 1 that is wound around the chest and directly detects the electrocardiogram near the heart and wirelessly transmits the signal. An arithmetic unit 2 that receives a signal from the unit 1 and detects a pulse wave in a peripheral portion, calculates a pulse wave velocity from the values of the electrocardiogram and the pulse wave, and calculates a blood pressure value.
And consisted of The blood pressure value is calculated by referring to the pulse wave velocity calculated from the values of the electrocardiogram and the pulse wave in the graph showing the relationship between the pulse wave velocity and the blood pressure value of the subject, which is set in advance.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pulse wave velocity sphygmomanometer that indirectly measures a blood pressure value by directly obtaining a pulse wave velocity.

[0002]

[Prior art]

 The pulse wave velocity sphygmomanometer is a device that indirectly measures the blood pressure value by obtaining the pulse wave velocity, which is based on the theory that the change in pulse wave velocity is inversely proportional to the change in blood pressure value. It is based.

Specifically, the blood pressure value and pulse wave velocity at rest (when blood pressure is low) are measured, and the blood pressure value and pulse wave velocity at high blood pressure, such as during exercise, are measured. Create a graph (see Figure 4) that is inversely proportional to The values in the states other than at rest and during exercise (when the blood pressure is high) can be recognized as the values on the straight line of the graph. After creating this graph, the blood pressure value can be known by simply measuring the pulse wave velocity.

Here, the pulse wave velocity is calculated from the relationship between the distance between the heart and the peripheral side (fingertip, ear tab, etc.) and the time until the pulse wave due to the heartbeat reaches the peripheral side. be able to. The heart beat is measured by detecting the R wave of the electrocardiographic waveform. The pulse wave is measured with an optical measuring device.

A blood pressure monitor based on this concept does not require an air circuit (arm band, pump, etc.), which is completely different from conventional blood pressure monitors, and therefore can be made extremely small and does not require winding of arm bands. Therefore, blood pressure can be measured without feeling any pain or annoyance due to the pressure on the arm with the armband.

As a sphygmomanometer based on the above theory, a wristwatch type sphygmomanometer is generally known. This sphygmomanometer is small and has a feature that blood pressure can be easily measured.

A specific measuring method is as follows.

Electrodes are provided on the front side and the back side of this sphygmomanometer, and the back side electrode contacts the arm on the sphygmomanometer wearing side and the finger (middle finger) of the opposite arm contacts the surface electrode. In this way, the electrocardiogram is measured from the voltage changes in both arms. Further, a photoelectric pulse wave measuring unit is provided on the surface of the sphygmomanometer, and a finger (forefinger) on the opposite side is applied to this photoelectric pulse wave measuring unit to measure the pulse wave.

Then, these detected values are calculated to obtain a blood pressure value.

[0010]

[Problems to be solved by the device]

 However, the above-mentioned conventional technique has the following problems.

For the measurement, the blood pressure monitor attached to one arm is detected by touching the finger of the other arm, but this finger must be pressed against the surface electrode of the blood pressure monitor so as not to move. No For this reason, it is necessary to keep the body quiet and do not move during the measurement, and there is a problem that the measurement becomes complicated.

In addition, when an electrocardiogram is detected with a fingertip, there is a problem in that the accuracy is poor because it is far from the heart and it may not be possible to make a complete physical measurement.

The present invention has been made in view of the above problems, and a pulse wave velocity method capable of constantly measuring blood pressure regardless of rest and exercise and capable of reliably detecting blood pressure regardless of constitution. The purpose is to provide a blood pressure monitor.

[0014]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, the first idea is to use the fact that the pulse wave velocity is inversely proportional to the change in blood pressure value and to calculate the pulse wave velocity by detecting the electrocardiogram and the pulse wave. It is a pulse wave velocity sphygmomanometer that measures the blood pressure value in the body. It has an electrocardiographic detection part that attaches electrodes to two parts of the body to detect the electrocardiogram, and a pulse wave attached to the peripheral side of the human body. A pulse wave detecting unit for detecting and a calculating unit for calculating a pulse wave velocity and calculating a blood pressure value from the value of the electrocardiogram from the electrocardiographic detecting unit and the value of the pulse wave from the pulse wave detecting unit. It is a special feature.

A second invention is an electrocardiographic detection unit which is wound around the chest and detects an electrocardiogram in the vicinity of the heart and sends out the signal, and a signal attached from the electrocardiographic detection unit which is attached to the peripheral side of the human body. Then, both are composed of an arithmetic unit for detecting a pulse wave in the peripheral portion, calculating a pulse wave velocity from these electrocardiographic and pulse wave values, and calculating a blood pressure value.

A third invention is an electrocardiographic detection unit that is wound around a chest and directly detects an electrocardiogram in the vicinity of the heart, a transmission unit that wirelessly transmits a signal detected by the electrocardiographic detection unit, and the transmission unit. A signal receiving unit receives a signal from the electrocardiographic detection unit and is attached to the peripheral side of the human body in a state of being electrically connected to the receiving unit and detects a pulse wave in the peripheral region. However, it is characterized by being configured from a calculation unit that calculates the pulse wave velocity from these electrocardiographic and pulse wave values and calculates the blood pressure value.

[0017]

[Action]

 The relationship between the pulse wave velocity of the subject and the blood pressure value is set in advance. The electrocardiogram is detected by the electrocardiographic detection unit through electrodes attached to two parts of the body such as the chest, regardless of whether it is at rest or during exercise. The signal is sent to the arithmetic unit by wire or wirelessly. The computing unit receives the electrocardiogram, which is a signal from the electrocardiographic detection unit, and also detects the peripheral pulse wave through the photoelectric pulse wave detection unit and the like. Then, the pulse wave velocity is calculated from the values of the electrocardiogram and the pulse wave, and the blood pressure value is calculated by referring to this pulse wave velocity and the relationship between the preset pulse wave velocity and the blood pressure value.

[0018]

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a configuration diagram showing a pulse wave velocity sphygmomanometer according to the present embodiment, FIG. 2 is a circuit configuration diagram of an electrocardiographic detection unit, FIG. 3 is a circuit configuration diagram of a calculation unit, and FIG. 4 is a pulse wave. 5 is a graph showing the relationship between the propagation velocity and blood pressure.

The pulse wave velocity system sphygmomanometer of the present embodiment utilizes the theory that the pulse wave velocity is inversely proportional to the change in blood pressure value, and indirectly obtains the pulse wave velocity by directly calculating the pulse wave velocity. It is a blood pressure monitor for measuring the same as the prior art in principle. The pulse wave propagation velocity is the velocity at which the pulse wave propagates in the blood vessel, and is calculated from the time and the distance at which the pulse wave due to the heartbeat propagates to the peripheral measurement position. The heart beat is detected by electrocardiogram detection, and the pulse wave propagation is detected by pulse detection.

Based on the above-mentioned graph (see FIG. 4) showing the relationship between the pulse wave velocity and the blood pressure, the value of the pulse wave velocity calculated from the electrocardiogram and the pulse wave is applied to this graph indirectly. Measure blood pressure. This graph is created in advance and recorded in the arithmetic circuit 19 described later.

As shown in FIG. 1, the pulse wave velocity sphygmomanometer includes an electrocardiographic detection unit 1 that is wrapped around the chest of a human body to detect an electrocardiogram near the heart, and a fingertip portion that is a peripheral side of the human body. The pulse wave propagation velocity is calculated from the value detected by the electrocardiographic detection unit 1 and the pulse value detected by the fingertip, and the blood pressure value is calculated from the graph created in advance. Has been done.

The electrocardiographic detection unit 1 includes a belt 4 to be wound around the chest of a human body, two electrodes 5 attached to the belt 4 and in direct contact with the chest, and attached to the belt 4 together with the electrodes 5. And an electrocardiographic detection transmission unit 6 that detects an electrocardiogram via the electrode 5 and wirelessly transmits the detection signal.

As shown in FIG. 2, the electrocardiographic detection transmission unit 6 includes an electrocardiographic detection circuit 7 that detects electrocardiogram through the two electrodes 5, and a waveform of a detected value from the electrocardiographic detection circuit 7. And a oscillating circuit 9 as a transmitting section for transmitting the signal of the waveform shaped by the waveform shaping circuit 8 to the computing section 2.

As shown in FIG. 1, the calculation unit 2 is formed like a wristwatch and has a calculation unit main body 11 for receiving and calculating a signal from the electrocardiographic detection unit 1, and a pulse wave generated by light attached to a fingertip (index finger). It is composed of a photoelectric pulse wave detection unit 12 for detecting.

As shown in FIG. 3, the arithmetic unit main body 11 includes a receiving circuit 14 as a receiving unit that receives a signal from the oscillation circuit 9 of the electrocardiographic detection transmitting unit 6, and a signal received by the receiving circuit 14. An amplifying circuit 15 for amplifying a signal, a first waveform shaping circuit 16 for shaping the waveform of the signal amplified by the amplifying circuit 15, and a photoelectric pulse wave detecting section 12 for detecting a pulse wave at the fingertip through the photoelectric pulse wave detecting section 12. The pulse wave detection circuit 17, the second waveform shaping circuit 18 that shapes the waveform of the signal from this detection circuit 17, and the pulse wave velocity by receiving the signals from the first and second waveform shaping circuits 16 and 18 It is composed of a calculation circuit 19 for calculating and indirectly calculating the blood pressure value, and a display 20 for displaying the blood pressure value calculated by the calculation circuit 19. In the calculation circuit 19, the time taken for the pulse wave due to the heartbeat to reach the fingertip is measured by the signals from the first and second waveform shaping circuits 16 and 18, and the time and the distance from the heart to the fingertip are measured. Calculate the pulse wave velocity from. Further, the blood pressure value is calculated by referring to the pulse wave velocity with the data of the graph recorded in advance.

The photoelectric pulse wave detection unit 12 is attached to the finger sack 21 (see FIG. 1) attached to the fingertip and the finger sack 21 in a state of being connected to the photoelectric pulse wave detection circuit 17 of the arithmetic unit body 11. The light-emitting element 22 and the light-receiving element 23 (see FIG. 3) for detecting the flow of the light by the change of the light amount.

The pulse wave velocity type sphygmomanometer configured as described above operates as follows.

The electrocardiographic detection unit 1 is wrapped around the chest, the arithmetic unit body 11 of the arithmetic unit 2 is attached to the wrist, and the photoelectric pulse wave detection unit 12 is attached to the fingertip. The pulse wave velocity and blood pressure of the subject during exercise and at rest are measured in advance to create a graph (see FIG. 4), and the data is recorded in the arithmetic circuit 19 of the arithmetic unit main body 11.

In the electrocardiographic detection unit 1, the electrocardiographic detection circuit 7 of the electrocardiographic detection transmission unit 6 detects the electrocardiogram through the two electrodes 5. The detected electrocardiogram is subjected to waveform shaping by the waveform shaping circuit 8 and is wirelessly transmitted from the oscillation circuit 9 to the calculation unit 2.

On the other hand, in the calculation unit 2, the pulse wave of the fingertip is detected by the photoelectric pulse wave detection circuit 17 of the calculation unit main body 11 via the photoelectric pulse wave detection unit 12, and the data thereof is waved by the second waveform shaping circuit 18. The shape is shaped and sent to the arithmetic circuit 19. Further, the data received by the receiving circuit 14 is amplified by the amplifying circuit 15, shaped by the first waveform shaping circuit 16 and sent to the arithmetic circuit 19. Then, in this arithmetic circuit 19, the time required for the pulse wave to propagate is calculated from the electrocardiogram detected at the chest and the pulse wave detected at the fingertip, and the pulse wave propagation velocity is calculated in relation to the distance from the heart to the fingertip. Is calculated. Further, the value of the pulse wave velocity is referred to the data of the graph (see FIG. 4) showing the relationship between the pulse wave velocity and blood pressure recorded in the arithmetic circuit 19 to calculate the blood pressure value. The calculated blood pressure value is displayed on the display device 20.

As described above, the electrocardiogram is detected by the electrocardiographic detection unit 1 wound around the chest with the belt 4, and the pulse wave is detected by the photoelectric pulse wave detection unit 12 connected to the calculation unit main body 11. It will be possible to measure blood pressure at all times regardless of time and rest.

Furthermore, since the electrocardiogram can be reliably measured even during exercise, blood pressure that changes momentarily during exercise can be measured in real time.

Since the electrocardiogram is measured in the vicinity of the heart of the chest, the electrocardiogram can be reliably detected regardless of the constitution.

In the above embodiment, the case where the photoelectric pulse wave detection unit 12 is provided at the fingertip with the arithmetic unit main body 11 on the peripheral side has been described as an example. However, it is possible to detect the pulse wave at a position distant from the heart. In this case, the pulse wave velocity can be calculated, so that the pulse wave velocity is not limited to the fingertip, and other parts such as an ear tab, a wrist, and an arm may be used.

Further, the electrode 5 is not limited to the chest near the heart, but may be any portion capable of detecting an electrocardiogram on both sides or arms.

Further, although the electrocardiographic detection unit 1 and the calculation unit 2 are electrically connected to each other by wireless, they may be connected by wire via a cord.

The photoelectric pulse wave detection unit 12 may be a pulse wave detection method of another type.

Further, in the above-described embodiment, the display unit 20 of the arithmetic unit main body 11 is provided so that the person to be measured can see the result by himself. May be transmitted wirelessly.

[0040]

[Effect of device]

 As described in detail above, according to the pulse wave velocity sphygmomanometer of the present invention, since the electrocardiogram is detected by the electrocardiographic detection unit via the two electrodes attached to the body, the electrocardiogram is exercised. This makes it possible to always and reliably perform measurement regardless of time and rest.

Furthermore, since the electrocardiogram can be reliably measured even during exercise, it becomes possible to measure the blood pressure that changes momentarily during exercise in real time.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a pulse wave velocity type sphygmomanometer according to the present invention.

FIG. 2 is a circuit configuration diagram of an electrocardiographic detection unit.

FIG. 3 is a circuit configuration diagram of a calculation unit.

FIG. 4 is a graph showing the relationship between pulse wave velocity and blood pressure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electrocardiographic detection part, 2 ... Calculation part, 5 ... Electrode, 6 ... Electrocardiographic detection transmission part, 11 ... Calculation part main body, 12 ... Photoelectric pulse wave detection part.

Claims (3)

[Scope of utility model registration request] 1. A pulse wave propagation in which the blood pressure value is indirectly measured by utilizing the fact that the pulse wave velocity is inversely proportional to a change in blood pressure value to calculate the pulse wave velocity by detecting an electrocardiogram and a pulse wave. A velocity-type sphygmomanometer, which comprises an electrocardiographic detection unit for detecting an electrocardiogram by attaching electrodes to two parts of a body, a pulse wave detection unit attached to a peripheral side of a human body for detecting a pulse wave, Pulse wave velocity sphygmomanometer characterized in that the blood pressure value is calculated from the electrocardiogram from the electric current detection unit and the value of the pulse wave from the pulse wave detection unit to calculate the blood pressure value. . 2. A pulse wave propagation in which the blood pressure value is indirectly measured by utilizing the fact that the pulse wave velocity is inversely proportional to a change in blood pressure value to calculate the pulse wave velocity by detecting an electrocardiogram and a pulse wave. A velocity-type blood pressure monitor, which is wrapped around the chest and detects an electrocardiogram in the vicinity of the heart and sends out its signal, and an electrocardiographic detector attached to the peripheral side of the human body to input the signal from the electrocardiogram detector. And a pulse wave velocity sphygmomanometer, which is configured to detect a pulse wave in the peripheral portion and calculate a pulse wave velocity from these electrocardiographic and pulse wave values to calculate a blood pressure value. . 3. A pulse wave propagation that indirectly measures a blood pressure value by utilizing the fact that the pulse wave velocity is inversely proportional to a change in blood pressure value to calculate the pulse wave velocity by detecting an electrocardiogram and a pulse wave. A velocity-type sphygmomanometer, which includes an electrocardiographic detection unit that is wound around the chest and directly detects an electrocardiogram in the vicinity of the heart, a transmission unit that wirelessly transmits the signal detected by the electrocardiographic detection unit, and the transmission unit And a receiving unit that is attached to the peripheral side of the human body in a state of being electrically connected to the receiving unit, receives a signal from the electrocardiographic detection unit, and detects a pulse wave in the peripheral portion. A pulse wave velocity system sphygmomanometer comprising: a calculation unit that calculates a pulse wave velocity from the values of electrocardiogram and pulse wave and calculates a blood pressure value.