JP3041963B2 - Blood pressure calculation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a blood pressure data display device capable of displaying a plurality of maximum or minimum blood pressure data.

[0002]

2. Description of the Related Art In recent years, awareness of health management has increased in homes and workplaces, and as a method of physical condition diagnosis for the health management, it is extremely important that each of them knows the tendency of their own systolic blood pressure and diastolic blood pressure. ing.

A conventional blood pressure measuring device is known which measures blood pressure using a pressure increasing / decreasing tube, an air pump, a blood flow detector and the like, and displays an instantaneous blood pressure value based on the measured blood pressure value. I have. There is also known a device that displays a blood pressure value by calculation based on preset blood pressure data and measured pulse wave conduction time data. Further, it has been considered that a plurality of measured blood pressure values are stored, and the stored blood pressure values are displayed at a later date.

[0004]

In order to know the tendency of blood pressure, a large number of blood pressure values measured and stored alternately may be arbitrarily displayed to see the tendency of change. Since the data is displayed in the order in which the data is stored, there is a problem that the data cannot be displayed as a tendency unless the stored data is data of the same person.

[0005]

An object of the present invention is to display a plurality of systolic blood pressures and diastolic blood pressures of a plurality of persons with one device, and to allow a plurality of persons to quickly and easily know their own blood pressure tendency. in subjecting Hisage value calculation unit.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides
The function of calculating the maximum and minimum blood pressure based on the pulse wave conduction velocity for each individual, the function of storing a plurality of blood pressure data obtained by the calculation for each individual, and the stored blood pressure data is displayed separately for each individual on the same display device The main point is that the blood pressure tendency of a plurality of persons' systolic blood pressure and diastolic blood pressure can be quickly and easily displayed for each individual person by incorporating the function of performing the function into one device.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of a portable tabletop blood pressure value calculation device according to an embodiment of the present invention.

In FIG. 1, an apparatus body case 1 is made of an electrically non-conductive synthetic resin or the like. An LCD (Liquid Crystal Display) 2 is provided on the upper surface slightly above the center to display time, blood pressure data, and the like. Below the LCD, a number of push-button keys are provided. Keyboard 5 is provided. Although not shown, these push-button keys are used to switch the display mode or
A key having a sign S1 to S6 for selecting a number,
It comprises ten keys for performing operations such as input of basic data, setting keys for storing the input data, and the like.

Electrocardiogram (electrocardiogram R-wave) detection electrodes 3-1 and 3-2 are provided on both front ends of the apparatus main body 1, respectively. Hold both palms by holding them together
It comes into close contact with the wave detection electrodes 3-1 and 3-2, whereby an R wave is detected.

Further, the right end face is provided with an R-wave detection electrode 3-2.
LED (light emitting diode) 4- shown in FIG.
1. A pulse detecting device 4 comprising a phototransistor 4-2
The pulse is detected by pressing the fingertip of the right middle finger or the forefinger when the apparatus main body 1 is pressed so as to be sandwiched between both hands as described above.

FIG. 2 is a block diagram showing an internal circuit of the apparatus main body 1 shown in FIG. In FIG.
Is a fixed memory containing a microprogram for controlling the system and data such as numerical values for various operations. The key input unit 12 includes the keyboard 5 described with reference to FIG.
Output to 0.

The control unit 10 is provided with a C or the like such as a microprocessor.
It is made up of a PU and controls the entire system based on a microprogram stored in the ROM 11. When the input signal from the key input unit 12 is a signal for instructing measurement of blood pressure, the control unit 11 outputs an operation signal a to activate a heart radio wave detection unit 13 described later and perform other operations. The signal b is output to activate the pulse detection unit 14 described later. In addition, a timekeeping process is performed based on a timekeeping timing signal input from a frequency dividing timing unit 15 described later.

The heart radio wave detector 13 has the R-wave detection electrodes 3-1 and 3-2 described with reference to FIG. 1, for example, a left palm applied to the R-wave detection electrode 3-1; An R-wave is detected from the right palm applied to the R-wave detection electrode 3-2, and the detected R-wave signal is output to the control unit 10.

The pulse detecting section 14 includes the pulse detecting device 4 described with reference to FIG. 1. The pulse detecting device 14 includes the LED 4-1 and the phototransistor 4-2 provided in the pulse detecting device 4, and the pulse flow of the blood of the right hand. To detect the pulse and output the pulse signal to the control unit 10. The sensing and detection of the pulsation utilizes the property that hemoglobin in blood absorbs light of a specific wavelength well, that is, the light emitted from the LED 4-1 is reflected after passing through the skin surface of the fingertip. The pulse is detected by utilizing the fact that the light is dimmed in inverse proportion to the amount of blood flow flowing through the fingertip due to the absorption effect received from the hemoglobin in the blood flow before input to the phototransistor 4-2. ing. This is because when the pulsating flow passes through the fingertip, the amount of blood flow is large, and in accordance with the amount of blood flow, the light emitted from the LED 4-1 is absorbed more and the reflected light is reduced, and the phototransistor 4 The light quantity input to -2 draws a wave that decreases and increases in accordance with the pulse. The increase / decrease of the input reflected light is converted into a voltage signal by the phototransistor 4-2, and the converted voltage signal is output to the control unit 10 as the pulse signal.

Since the heart radio wave is an electrical signal that flows instantaneously in the body, it reaches the body surface (both palms) at the same time as the pulsation of the heart that generates the R wave and is detected by the heart radio wave detection unit 13. On the other hand, one pulse receives resistance due to the characteristics of blood vessels and other reasons, and arrives at the body surface, that is, the fingertip, later than the time of occurrence of the sent pulsation, and the pulse detection unit 14 Is detected.

The control unit 10 detects a time difference (pulse delay time) between the heart wave signal input from the heart wave detection unit 13 and the pulse signal input from the pulse detection unit 14 based on the heart wave signal. Based on the detected delay time data and preset reference data, blood pressure data is calculated by a method described later, and the calculated blood pressure data is output to the decoder driver 16.

The decoder / driver unit 16 includes the control unit 10
The display controller 17 decodes the data input from the CPU 11 to generate a display drive signal, and outputs the display drive signal to the display unit 17. The display unit 17 includes the LCD 2 described in FIG. 1, and performs a predetermined display based on the display drive signal input from the decoder / driver unit 16.

The oscillator 18 generates a clock signal having a constant period and outputs the clock signal to the frequency division timing section 15. The frequency division timing section 19 is composed of a frequency division circuit and a timing generator, and outputs a clock signal and a timing signal for controlling each section in a time series to the control section 10.

The RAM 19 is a random access memory, and as shown in FIG. 3, described later, is constituted by registers for storing predetermined data. Report section 20
Emits a buzzer sound to notify switch operation confirmation and the like.

FIG. 3 is a diagram showing the main internal configuration of the RAM 19. The data stored in each register shown in FIG. The display register 31 includes the display unit 17.
The display data to be displayed on the LCD 2 is stored.

The current time register 32 stores the current time counted based on the clock signal output from the frequency division timing section 15. A register M stores a value of “0” or “1” corresponding to two basic display modes (display of a basic clock mode and display of a blood pressure measurement mode) shown in FIG. It is.

The register F stores "0" in the ID number setting mode in the display of the blood pressure measurement mode shown in FIG. 9 described later with M = 1 (the value of the register M is "1"). In the case of, "1" is stored, in the case of the reference data measurement mode at rest, "2" is stored, in the reference data measurement mode immediately after exercise, "3" is stored, and in the case of the measurement data recall mode, "3" is stored. 4 "is stored.

The register ID is a register for storing ID (personal identification number) data when inputting or measuring blood pressure data. The register N is a register that stores “1” after the detection of the R wave and “2” after the first pulse detection after the detection of the R wave, and is reset to “0” when the measurement is completed.

The register T is a timer register used for measuring blood pressure data. The register TTR stores the time difference data at rest. The register PR stores pulse data at rest.

The register SR stores the resting systolic blood pressure data. The register DR stores the resting diastolic blood pressure data. The register TTE stores time difference data immediately after exercise.

The register PE stores pulse data immediately after exercise. The register SE stores systolic blood pressure data immediately after exercise. The register DE stores the diastolic blood pressure data immediately after the exercise.

The register MTT stores the measured time difference data. The register MP stores the measured pulse data. The register MS stores the systolic blood pressure data obtained by the calculation after the measurement.

The register MD also stores the diastolic blood pressure data. The register KA is an address pointer for storing measurement data in a register Ki described later.

The register Ki (i = 0, 1,..., M) comprises a large number of registers K0 to Km, each of which is composed of a storage section KS, KD, KP, KT, KI. The storage unit KS stores the measured systolic blood pressure data, the storage unit KD stores the measured diastolic blood pressure data, the storage unit KP stores the measured pulse data, and the storage unit KT stores the date and time of the measurement. Memorize time data,
The storage unit KI stores the measured person ID data.

The register Lj (j = 0, 1,... N) is composed of a large number of registers L0 to Ln, each of which corresponds to ID data and has a storage unit LS, Ln.
D. The storage unit LS stores two constants indicating the relationship between the systolic blood pressure and the pulse wave conduction velocity of the person identified by the ID data, which will be described later. Further, the storage unit LD stores two constants indicating a relationship between a diastolic blood pressure, a pulse wave conduction velocity, and a pulse, which will be described later.

[0031] In the input way this embodiment of the blood pressure data, although of a personalized and displays an systolic and diastolic blood pressure,
These blood pressure values are not obtained by actually measuring the pressure of the blood vessel, but are obtained by the following algorithm. That is, FIG. 10 is a diagonal diagram showing characteristics of systolic blood pressure values expressed by taking blood pressure values (blood pressure data) in the vertical direction and pulse wave conduction velocities (time difference data described later) in the horizontal direction. The hatched line A is
A point 10- indicated by the systolic blood pressure value SE measured immediately after the predetermined exercise and the pulse wave conduction velocity TTE at the time of measuring the systolic blood pressure.
1, a point 10-2 indicated by the systolic blood pressure value SR measured at rest and the pulse wave conduction velocity TTR at the time of measuring the systolic blood pressure.
Can be obtained by connecting The same person measures the systolic blood pressure and pulse wave conduction velocity in other states (other than at rest or immediately after exercise), and shows the points indicated by the measured systolic blood pressure and pulse wave conduction velocity. As described above, it is known that all these points converge near the oblique line A. Therefore, first, as a reference data, the systolic blood pressure value at rest and immediately after exercise and the pulse wave conduction velocity are measured and the constant of the oblique line A is recorded. Thereafter, only the conduction velocity MTT is measured. The systolic blood pressure value at that time is obtained by calculation. For example, when the measured conduction velocity is MTT, the corresponding blood pressure value MS from point 10-3 on the oblique line A
And this value is the systolic blood pressure value at that time.

The oblique line A is a linear expression y = ax + b (a, b
The constants a and b can be expressed by inputting the systolic blood pressure values during exercise and at rest measured by another accurate sphygmomanometer and measuring the systolic blood pressure from the pulse and the heart radio wave. It is calculated by the control unit 10 by measuring the obtained pulse wave conduction velocity (time difference data).

The two constants calculated above are stored in the RAM
The data is stored in the storage section LS of the nineteen registers Lj. Therefore, after the above input and measurement, only the pulse wave conduction velocity MTT is measured.
By substituting T into x of a linear expression defined by the two constants stored in the storage unit LS and calculating, y, that is, the systolic blood pressure value MS can be calculated and obtained.

Next, a diagonal line B shown in FIG. 11 indicates a blood pressure value in the vertical direction and a diastolic blood pressure value in the horizontal direction, which is a value represented by pulse wave conduction velocity × pulse data (pulse rate per minute). FIG. 7 is a hatched diagram showing a value characteristic. This oblique line B is a point 11-1 indicated by a diastolic blood pressure value DR measured at rest, a value TTR × PR obtained by integrating the pulse wave conduction velocity and pulse data at the time of measuring the diastolic blood pressure, and a point measured immediately after exercise. Diastolic blood pressure DE
It is obtained by connecting a point 11-2 represented by a value TTE × PE obtained by integrating the pulse wave conduction velocity and the pulse data at the time of measuring the minimum blood pressure. As in the case of systolic blood pressure, the same person measures the diastolic blood pressure in other states, and the points indicated by the measured diastolic blood pressure and the pulse and pulse wave conduction velocity at that time are described on the same figure. Are all known to converge near the oblique line B. Therefore, also in this case, as a reference value, the diastolic blood pressure at rest and immediately after exercise is measured and input as described above using another accurate blood pressure monitor, and the pulse and pulse at the time of measuring the diastolic blood pressure are also input. If the wave conduction velocity is measured and the primary expression indicating the oblique line B indicating the above characteristic is recorded, then only the pulse and the heart radio wave are measured, and the pulse wave conduction velocity obtained from the measurement of the pulse and the heart radio wave is obtained. MTT
The point 11-3 on the corresponding oblique line B can be obtained from the integrated value MTT × MP of the pulse MP
From the upper point 11-3, the corresponding diastolic blood pressure value MD can be obtained.

Incidentally, the oblique line B is also a linear expression y = m
x + n (m and n are constants), and the constants m and n are based on the pulse wave conduction velocity obtained from the input of the above-mentioned diastolic blood pressure value, the pulse measured at the time of measuring the diastolic blood pressure and the heart radio wave. Calculated by the control unit 10.

The two calculated constants are also stored in the storage section LD of the register Lj of the RAM 19, respectively. The value MTT × MP obtained by integrating the pulse wave conduction velocity and the pulse is stored in the storage unit L.
By substituting x into a linear expression defined by two constants stored in D and calculating, y, that is, the diastolic blood pressure value MD can be calculated and obtained.

Next, switching of the display mode set by the keys S1 to S5 shown in FIG. 1 will be described. As shown in FIG. 8, the value of the register M is changed from "0" to "1" by the operation of the key S1 as described later.
→ "0" → "1" ...
The display of the basic clock mode shown by MD10, the display of the blood pressure measurement mode shown by MD20, and the display and display of the basic clock mode are switched again in accordance with the value of. MD10 above
In the display of the basic clock mode shown in, although not particularly shown, the current time of year, month, day, day of the week, hour, minute, and second is displayed on the LCD.
2 at a predetermined display position.

Next, when the register M = 1 and the display of the blood pressure measurement mode shown in MD20 in FIG.
The display mode is further switched by the key input of 2 to S5, and the switching of the display mode will be described with reference to FIG.

The blood pressure measurement mode indicated by M = 1 is set, and when the register F = 0, the mode is the ID number setting mode. In this ID number setting mode, for example, MD2 in FIG.
As shown in FIG. 00, “1” indicating an ID number such as “ID No. 1” is displayed above the LCD 2 while blinking, and an under bar is displayed at the center of the LCD 2 at the “BP” display portion. The body is displayed to indicate that the mode is the blood pressure measurement mode.

When the display is in the ID number setting mode of M = 1 and F = 0, the register is switched to F = 2 by the key input of the key S4, as will be described later. The display mode is switched to the display of the rest reference data setting mode indicated by MD202 in FIG. In this display mode, “REST” indicating resting time is displayed above the LCD 2, an underbar display body and “P” indicating a pulse are displayed in the center of the LCD 2 at the “BP” display portion, and further “−”. "-" Display and heart-shaped display blink. In the rest reference data setting mode, various blood pressure data such as the highest and lowest blood pressures at rest, which are the reference data described in the input of the blood pressure data, are input or measured, and stored in each predetermined register of the RAM 19. This will be described later.

Furthermore, if the key input of the key S5 is performed during the display of the ID number setting mode, the value of the register F is switched to "3", and the reference data immediately after exercise shown in MD203 of FIG. The display switches to the mode display.
In the reference data setting mode immediately after exercise, “EXER” (abbreviation for EXERCISE) indicating immediately after exercise is displayed above the LCD 2. Also in this case, it is possible to input and measure various data immediately after the exercise as the reference data, which will be described later in detail.

When a key input of the key S2 is made while the display shown in MD200 of the same figure is being performed, the value of the register F is switched to "1" and F = 1.
Switches to the measurement execution mode specified by. In this display mode, the R-wave detection electrode 3 shown in FIG.
By pressing both palms 1 and 3-2 and the fingertip of the index finger (or middle finger) of the right hand against the pulse detection device 4, the R wave and the pulse detected from both palms and the fingertips, and the above-mentioned rest and exercise Immediately thereafter, the blood pressure is calculated from the reference data set by measurement, input, and the like, and as a result, for example, as shown in MD201 in FIG.
2. The diastolic blood pressure 70 ”is displayed, and after a certain time, the MD2
The display returns to 00.

Further, when the key input of the key S3 is performed while the display shown in the MD 200 of FIG.
The value of the register F is switched to “4”, and the mode is switched to the measurement data recall mode specified by F = 4.
In this display mode, the blood pressure data measured and stored in the measurement execution mode is called for each specified ID number. For example, as shown in MD204 of FIG. , Current recall mode, pulse 67, systolic blood pressure 145, diastolic blood pressure 75 "are displayed on the LCD 2.

Next, in each of the above display modes, the display of the time and blood pressure data performed under the control of the control unit 10, and the operation of each measurement process and the input data storage process for the display are shown in FIGS. This will be described with reference to the flowchart shown. FIG. 4 is a flowchart showing the flow of the entire program.

Timekeeping and Blood Pressure Measurement Processing First, the processing performed each time a timekeeping signal of a predetermined cycle is output from the frequency division timing section 15 will be described.

In FIG. 4, HALT of step SA1 is performed.
In this state, when an input is made from the key input unit 12, the process proceeds to step SA9, and when a clock signal is input from the frequency division timing unit 15, the process proceeds to step SA2. In step SA 2, a time counting process is performed, and the obtained current time data is stored in the current time register 32 of the RAM 19. Then, in the next step SA3, it is determined whether or not the blood pressure measurement mode is set by referring to the value of the register M. Then, the value of the register M is “1” (hereinafter, M =
If it is described as "1"), the blood pressure measurement mode is set. In this case, the process proceeds to Step SA4, and it is determined whether the value of the register F is "1". If F = 1, it is determined that the measurement execution mode in the blood pressure measurement mode has been set, and the process proceeds to step SA5. After performing the blood pressure measurement process described later in detail, the process proceeds to step SA8. , A display process corresponding to the value of the register F when M = 1 shown in FIG.
Return to A1.

If F = 1 is not satisfied in step SA4, the process proceeds to step SA6, where F = 2 or 3, ie, M in FIG.
It is determined whether the reference data measurement mode at rest shown in D202 or the reference data measurement mode immediately after exercise shown in MD203 in FIG. If F = 2 or 3, the process proceeds to step SA7, and the MTT / MP measurement (including the setting of the reference value), which will be described in detail later, is performed, and the process proceeds to step SA8. Step SA above
If F is neither F = 2 nor 3, the process immediately proceeds to step SA8. Also, in step SA3, when M = 1 is not satisfied, that is, when the basic clock mode is M = 0, the process immediately proceeds to step SA8.

By the above operation, when M = 1 and F = 1, the blood pressure measurement process is executed, and when M = 1 and F = 1
When = 2 or 3, MTT / MP measurement processing is executed. On the other hand, when M = 0, a time display process is executed.

Display Mode Switching Process Next, the display mode switching process by operating the keys S1 to S5 shown in FIG. 9, that is, the process of changing the values of the registers M and F by the key operation will be described.

In the HALT state of step SA1 in FIG. 4, when there is a key input from the key input unit 12, the control unit 10 proceeds to step SA9, and determines whether the key input is the key input of the key S1. Determine. If the key input is made by the key S1, an alternate switching between the basic clock mode and the blood pressure measurement mode has been instructed as shown in FIG.
Is "1" if the value is "0", and "0" if "1".
After that, the flow advances to step SA11 to determine whether or not the value of the register M is "1". M = 1
If this is the case, the mode has been switched from the basic clock mode to the blood pressure measurement mode. In this case, the process proceeds to step SA12, and by setting F = 0, the display mode of FIG. After setting the ID number setting mode indicated by MD200, the process proceeds to step SA8.

If M = 0 in step SA11, the mode has been switched from the blood pressure measurement mode to the basic clock mode. In this case, step SA8 is immediately performed.
Move to

By the above operation, each time the key S1 is operated, the value of the register M is changed from "0" → "1" → "0" →.
And the display mode is alternately switched between the basic clock mode and the blood pressure measurement mode shown in FIG. 8 based on the value of the register M. When the blood pressure measurement mode is selected, the display mode is changed according to the value of the register F. In the display mode described above, blood pressure measurement processing, MTT / MP measurement, and the like, which will be described in detail later, are executed in steps SA5 and SA7.

Next, the operation of switching the value of the register F by key input will be described. Step SA in FIG. 4 above
If it is determined in step 9 that the key input is not made by the key S1, the flow advances to step SA13 to determine whether the input is made by the key S2. If the input is made by the key S2, the flow advances to step SA14, where the key input is M = 1.
And F = 0, that is, I in the blood pressure measurement mode shown in FIG.
It is determined whether or not the operation has been performed in the D number setting mode. If the key input is made at M = 1 and F = 0, it is instructed to switch from the ID number setting mode shown in MD200 of FIG. 9 to the resting reference data measurement mode. Therefore, in this case, the process proceeds to step SA15, where F = 1 is set, and the mode is switched to the rest reference data measurement mode indicated by MD202 in FIG. In step SA14, if M = 1 or F = 0, the operation of the key S2 is invalidated, and the process immediately proceeds to step SA8.

By the above operation, when the key is input by the key S2 while the ID number setting mode is displayed, the display is switched to the measurement execution mode. If it is determined in step SA13 in FIG. 4 that the key input is not the key S2, the flow advances to step SA16 to determine whether the key input is the key S3. If the input is from the key S3, the flow advances to step SA17 to determine that M = 1, that is, a key input in the blood pressure measurement mode. 4 ", and if it is" 4 ", it is alternately switched to" 0 "and set.
Alternately switches between the D number setting mode and the measurement data recall mode. Unless M = 1, the set switching of the register F is not performed.

By the above operation, when an input is made with the key S3 in the ID number setting mode, M in FIG.
ID number setting mode shown in FIG.
The display of the measurement data recall mode shown in the figure is switched alternately.

On the other hand, if it is determined in step SA16 that the key input is not an input by the key S3, the flow advances to step SA18 to determine whether or not an input is by the key S4. If the input is made by the key S4, the flow advances to step SA19. In this case as well, after it is determined that the input is the key input in the blood pressure measurement mode of M = 1, the value of the register F is set to "0". The key S is set by alternately switching to “2” if it is present and “0” if it is “2”.
4. Alternately switches between the ID number setting mode and the resting reference data measurement mode specified by the input of 4. In step SA19, reference data is set as described later. The register F is not switched unless M = 1.

According to the above operation, when an input is made by the key S4 in the ID number setting mode, M in FIG.
ID number setting mode shown in FIG.
The display of the reference data measurement mode at rest shown in FIG.

If the mode is changed to the resting reference data measurement mode by this switching, the MTT / MP measurement in the step SA7, the input of blood pressure data described later,
In addition, reference data to be described later is set.

Next, if the key input is not the input by the key S4 at the step SA18, the flow advances to a step SA20 to determine whether or not the input is the key S5. If the input is made by the key S5, the process proceeds to step SA21. In this case as well, it is determined that the input is a key input in the blood pressure measurement mode of M = 1, and the value of the register F is set to "0" this time. If it is, it is set to “3”, and if it is “3”, it is set to “0” by switching.
5. Alternately switches between the ID number setting mode designated by the input of 5 and the reference data measurement mode immediately after exercise. Also,
At step SA20, reference data is set. Unless M = 1, the register F is not switched.

According to the above operation, when an input is made by the key S5 in the ID number setting mode, M in FIG.
ID number setting mode shown in FIG.
Immediately after exercise, the display of the reference data measurement mode is alternately switched.

Even in the case of the reference data measurement mode immediately after exercise due to the above switching, measurement of MTT / MP, input of blood pressure data, and setting of reference data are performed. Setting of reference data Here, switching of the set value of the register F between “0” and “2” in step SA19 and the setting of the register F =
5 shows details of the reference data setting process in the case of FIG.
This will be described with reference to the flowchart of FIG.

First, at step SB1, it is determined whether or not M = 1, that is, whether the mode is the blood pressure measurement mode. If the blood pressure measurement mode is M = 1, the process proceeds to step SB2, and further, F
= 0, that is, whether or not the mode is the ID number setting mode. If F = 0, the flow advances to step SB3 to set F = 2, switch the display mode to the display of the rest reference data measurement mode, and end this processing. If F = 0 is not satisfied in step SB2, the process proceeds to step SB4, where it is determined that F = 2 switched by the process in step SB3, and the process proceeds to step SB5.
Registers TTR, PR, SR, DR, TTE, PE,
It is determined whether data is stored in all of SE and DE. If data is stored in all of the eight registers, an operation is performed based on the data to perform the operation shown in FIG.
0, the constants of A and B shown in FIG. 11 are calculated, and the calculated data is stored in the ID set in the register ID.
The reference data is stored in the storage units LS and LD of the register Lj specified by the number data. Thereafter, the flow advances to step SB7 to set F = 0 and set the display mode to ID.
The mode is switched to the number setting mode and the process ends.

If no data is stored in any of the eight registers in step SB5, the process immediately proceeds to step SB7. Also, the above step SB4
If F = 2, the process is immediately terminated.

The flow of switching of the set value of the register F between "0" and "3" in step SA21 of FIG. 4 and the details of the reference data setting process when the register F = 3 is not shown. Are performed in the same manner as the processing shown in the above-described steps SB1 to SB7 (however, F = 0 or 3). In this case, the calculated constants of A and B in FIGS. Are stored in the storage units LS and LD of the register Lj specified by the ID number data set in the register Lj.

By the above operation, two sets of reference data are stored in the storage units LS and LD of the register Lj only when data is set or measured in both the reference data measurement mode at rest and the reference data measurement mode immediately after exercise. Is stored, and only one of the settings and the measurement alone does not set the reference data.

Details of the blood pressure data measurement process In the above-mentioned resting reference data measurement mode set by M = 1 and F = 2, and in the immediately after exercise reference data measurement mode set by M = 1 and F = 3 Measures the heart radio wave and the pulse in the process of step SA7. In the measurement execution mode when M = 1 and F1, the heart radio wave and the pulse are also measured in the blood pressure measurement process in step SA5. And to measure.

Here, the blood pressure measurement processing and the measurement of the heart radio wave and the pulse (that is, the MTT and MP data are obtained thereby) will be described in detail with reference to the flowcharts of FIGS.

In step SC1 of FIG. 6, the MTT / MP measurement processing, which will be described in detail later, is performed to obtain time difference data and pulse data, and the process proceeds to step SC2 where the data is designated by the ID number set in the register ID. Four pieces of reference data (that is, specific constants for determining linear expressions indicating oblique lines A and B shown in FIGS. 10 and 11) are read from the storage units LS and LD of the register Lj.
In 3, the systolic blood pressure data and the diastolic blood pressure data are calculated based on the time difference data and pulse data obtained in step SC1 and the four read reference data. Next, proceeding to step SC4, the storage units KS, KD, KP, K of the register Kj specified by the register KA
For T and KI, the systolic blood pressure data and diastolic blood pressure data calculated by the above calculation, the pulse data obtained by measuring the MTT / MP, the date and time stored in the current time register 32, and the ID number stored in the register ID are set. Store each. Thereafter, the process proceeds to step SC5, in which the systolic blood pressure data, the diastolic blood pressure data, and the pulse data among the above data are changed for a predetermined time, for example, 1 as shown in MD201 in FIG.
After displaying for 0 seconds, the process ends.

With the above operation, in the blood pressure measurement process, calculation is performed based on the measured value and the individual reference data calculated and stored in the RAM 19 by the calculation described later, and the systolic blood pressure data and the diastolic blood pressure data are calculated. RAM1
9 is stored together with the individual ID number in the register Kj.

Next, the MTT · MP in step SC1
Will be described in detail with reference to the flowchart of FIG. At step SD1 in FIG. 7, the control unit 10 outputs a signal a to detect a heart radio wave,
Is started, and a signal b is output to detect the pulse, and the pulse detecting unit 14 is started. And step SD
Proceeding to 2, it is determined whether or not a heart radio wave (electrocardiogram R wave) has been detected. If no heart radio wave is detected in this determination, the process proceeds to step SD5.
The process repeats that the process proceeds to 9 and ends because this is not N = 2. However, when a heart radio wave is detected thereafter, the process proceeds from step SD2 to step SD3, where the RAM 19
Then, the timer register T is started to start timekeeping, and then the process proceeds to step SD4, where "1" is set in the flag register N of the RAM 19, and the process ends.

With the above operation, the timer T is started by detecting the heart radio wave. Next, when the flag N = 1, the process proceeds from step SD5 to step SD6,
The determination as to whether the pulse after the detection of the heart radio wave is detected is repeated. When a pulse is detected, the timer register T is stopped in step SD7, and the process proceeds to step SD8.
To set "2" in the flag register N, and terminate the process.

When a pulse is detected by the above operation, the timer T is stopped, and the flag N is set to "2". That is, the timer T stores a time difference from the detection of the heart radio wave to the detection of the pulse at the fingertip, that is, pulse wave velocity data.

Next, in step SD5, it is detected that N is not 1, and the flow advances to step SD9 to determine whether or not N = 2. Then, since N = 2, in the next step SD10, the next succeeding pulse is detected. Pulse data is obtained from the time difference between the second pulse and the previous pulse. Although not shown, the time difference data of the timer T measured from the heart radio wave detected in step SD2 and the pulse detected in step SD6 is stored in the register MTT of the RAM 19 as pulse wave velocity data, and the pulse data is further stored. After the pulse data is stored in the register MP of the RAM 19, N = 0 indicating the completion of the process is set.

By the above operation, the R-wave detection electrodes 3-1, 3
-2, the pulse wave speed data is measured by the pulse detector 4, and the pulse wave speed data (time difference data) and the pulse data are stored in the register M of the RAM 19.
They are stored in the TT and the register MP, respectively.

Measurement Processing and Display Processing for Each ID Number Subsequently, setting of an ID number using the key S6 will be described. In step SA22 of the flowchart in FIG.
When the key operation of the key S6 is detected, the process proceeds to Step SA23, and if M = 1, the process proceeds to Step SA24 and F =
It is determined whether it is 0. If F = 0, the input by the key S6 is performed in the ID number setting mode in the blood pressure measurement mode shown in MD200 of FIG. 9, and the setting (selection) of the ID number is instructed. is there. However, in this case, the process proceeds to step SA25, where the ID number is updated by incrementing the value of the register ID of the RAM 19 by "1" (step 1 is advanced). Then, returning to step SA8, the updated ID number is blinked and displayed as shown in MD200 of FIG. In step SA23, unless M = 1, the process immediately proceeds to step SA8.

By the above operation, in the ID number setting mode in the blood pressure measurement mode, the ID number is set (selected) by the key S6. Based on the selected ID number, setting of individual reference data corresponding to the ID number (steps SA19 and SA21), measurement of blood pressure data using the reference data (step SA5), and measurement data It performs recall display and the like.

Next, in step SA24, if F = 0 is not satisfied, the process proceeds to step SA26, where it is determined whether or not F = 4. If F = 4, the measurement data recall mode shown in MD204 in FIG. Since the key input is made in step, the process proceeds to step SA27 to display the blood pressure measurement data of the selected ID number. Step SA
In step 27, the register Ki of the RAM 19 is sequentially searched from K0, and the same ID number as the ID number set in the register ID is sequentially read out from the one stored in the storage unit KI.
Then, the flow shifts to the display process 8. In step SA26, F
If not = 4, the input of the key S6 is invalidated, and the routine immediately proceeds to step SA8.

With the above operation, in the measurement data recall mode, the blood pressure measurement data of the person corresponding to the selected ID number is sequentially read from the storage units KS, KD, KP, and KT of the register Ki corresponding to the ID number. As described with reference to the MD 204 in FIG.
Displayed for seconds.

In step SA22, the key S1
When a key input by a key other than S6, that is, a numeric keypad, is detected, the process proceeds to step SA28 to perform various input data setting processes. In this process, the maximum and minimum blood pressure data at rest or immediately after exercise measured by the accurate blood pressure monitor described in the blood pressure data input are input, and the input data is as shown in MD202 or MD203 in FIG. Flashes, and after confirmation, RA
These are stored in the registers SR, DR, SE, and DE of M19. At this time, step SA7
As described above, the pulse data and the pulse wave velocity data measured by the MTT / MP measurement processing performed in the above are stored in the registers TTR and PR or the TTE and PE of the RAM 19, respectively.

Since the processing of the present embodiment is performed as described above, a plurality of persons can arbitrarily and arbitrarily measure a plurality of blood pressure data for each individual by selecting an ID number using one device. The measured blood pressure data can be arbitrarily displayed, and the tendency of changes in systolic blood pressure data, diastolic blood pressure data, pulse, and the like can be easily known for each individual.

In the above embodiment, the display of blood pressure data, pulse data, measurement time data and the like stored in the register Ki is provided by providing a segment display on the LCD 2 as shown in FIG. It can also be displayed as a graph by dot matrix display.

In the above embodiment, the blood pressure data is displayed for 10 seconds, but the display time may be set arbitrarily. Further, in the above-described embodiment, the constants of the straight lines A and B in FIGS. 10 and 11 are calculated and stored. However, the blood pressure data is calculated from preset or measured data for each display of the blood pressure data. It may be.

In the above embodiment, the desk-top type dedicated device is used. However, the device may be incorporated in a table clock or the like, and various applications can be considered. Further, the present invention can be applied to other blood pressure measuring devices such as a device for directly measuring blood pressure using a pressurizing / depressurizing tube or an air pump.

[0084]

According to the present invention, using one device,
A plurality of systolic blood pressure data, diastolic blood pressure data, pulse data, etc. of a plurality of people are stored, and a plurality of systolic blood pressure data, diastolic blood pressure data, pulse data stored for each individual are arbitrarily displayed on the same display device. Since it is possible, many people can quickly and easily know the tendency of changes in their systolic blood pressure data, diastolic blood pressure data, and pulse data at home, at work, or the like, using one device.

[Brief description of the drawings]

FIG. 1 is an external view of a blood pressure value calculation device according to an embodiment of the present invention.

2 is a block diagram of the internal configuration of the blood pressure value computing device.

FIG. 3 is a main internal configuration diagram of a RAM.

FIG. 4 is a flowchart showing the flow of the entire program.

FIG. 5 is a flowchart showing details of a reference data setting process.

FIG. 6 is a flowchart showing details of a blood pressure measurement process in the flowchart of FIG. 4;

FIG. 7 is a flowchart showing details of MTT / MP measurement processing.

FIG. 8 is a diagram illustrating a mode switched by operating a key S1.

9 shows keys S2 and S in the blood pressure measurement mode of FIG.
It is a figure explaining the mode switched by operation of 3, S4, and S5.

FIG. 10 is a diagram showing a correlation between systolic blood pressure and pulse wave conduction velocity.

FIG. 11 is a diagram showing a correlation between a diastolic blood pressure and a pulse wave conduction velocity.

[Explanation of symbols]

 2 LCD (Liquid Crystal Display) 3-1 and 3-2 R-wave detecting electrode 4 Pulse wave detecting device 5 Keyboard 10 Control unit 11 ROM (Read Only Memory) 12 Key input unit 13 Heart radio wave detecting unit 14 Pulse detecting unit 15 Frequency division timing section 16 Decoder / driver section 17 Display section 18 Transmitter 19 RAM (Random access memory) 20 Sound section

Claims (4)

(57) [Claims] 1. Detection of a heart radio wave and a pulse at a measurement position
Calculation means for calculating the pulse wave conduction velocity from the time difference
Calculated by the pulse and the first calculation means
Systolic blood pressure and minimum based on pulse wave conduction velocity
First calculating means for calculating the blood pressure value, and the first calculating means
Control means for displaying the calculation result by the step on the display unit;
In the blood pressure value calculation device provided, the reference data used for calculation by the first calculation means,
Associating with the identification data for identifying the reference data
Storage means for storing a plurality of data, selecting means for selecting identification data, and displaying the identification data selected by the selecting means
And display a plurality of them in the storage means.
Corresponding to the selected identification data from the reference data
Reading means for reading the reference data, and a pulse wave conduction velocity calculated by the first calculating means
Blood from the reference data read by the reading means.
Controlling the first calculating means so as to calculate the pressure value;
Display control means for displaying the calculated blood pressure value on the display unit
And a blood pressure value calculating device. 2. The reference data, Pulse wave velocity and maximum at least at rest
Relationship with blood pressure value and pulse immediately after exercise of the measurer
Two constants derived from the relationship between wave conduction velocity and systolic blood pressure
Numbers and At least the pulse wave conduction velocity at rest of the measurer at rest
Relationship between pulse multiplied value and diastolic blood pressure at rest, and
And pulse wave conduction velocity and pulse immediately after exercise of the measurer
The relationship between the value multiplied by the pressure and the diastolic blood pressure immediately after exercise?
And two constant values obtained from The blood pressure value calculation according to claim 1, comprising:
apparatus. 3. An electrocardiogram and a pulse of the subject at rest.
Second calculation of pulse wave conduction velocity from time difference of detection with beat
Calculating means; The pulse, and calculated by the second calculating means
When the subject is at rest,
Enter the systolic and diastolic blood pressure values Input means
When, Time difference between detection of heart radio waves and pulse immediately after exercise of the measurer
Third calculating means for calculating the pulse wave conduction velocity from, The pulse, and calculated by the third calculating means
Corresponding to the pulse wave conduction velocity,
Second input means for inputting a high blood pressure value and a diastolic blood pressure value, The first input means, and the second input means
Second operation for calculating the reference data from the input value
Means, The reference data calculated by the second calculating means is
A record to be stored in the storage means in association with the identification data.
Memory control means; The blood pressure value according to claim 2, further comprising:
Arithmetic unit. 4. Third input means for inputting arbitrary data
Further comprising The storage control means is input by the third input means.
Any given data is stored in the storage unit as identification data.
To memorize, The blood pressure value calculation device according to claim 3, wherein: