JPH1147102A - Device and method for measuring blood pressure and recording medium for recording processing program for blood pressure measurement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain high reliability of blood pressure related data measured by a blood pressure measuring device. SOLUTION: Pressure is applied to a cuff 21 surrounding a subject's arm to a predetermined initial pressure value by providing compressed air by a pressurizing device 17, and pressure is then reduced at a constant speed by a constant speed exhaust valve 19. In this stage, a highest blood pressure value Pmax, a lowest blood pressure value Pmin, the pulse rate Np, the pulse interval time t1, t2,...tn are measured based on individual pulse pressure detected by a pressure sensor 18, and are stored in highest and lowest blood pressure data storage portions, a pulse data storage portion, and a pulse interval data storage portion in a RAM 16. An evaluation index (r)of each measured data is calculated according to the operation formula for the evaluation index of the measurement stored in RAM 16 based on the pulse interval time t1, t2,...tn. Then, the result of the evaluation in accordance with the evaluation index (r) along with each measured blood pressure value Pmax, Pmin, and the measured pulse Np are displayed on a display for a user.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blood pressure measurement device for measuring blood pressure, a blood pressure measurement method, and a recording medium on which a blood pressure measurement processing program is recorded.

[0002]

2. Description of the Related Art In recent years, an electronic blood pressure monitor has been widely put into practical use as a blood pressure measuring device in recent years. However, this electronic blood pressure monitor usually applies pressure by winding a cuff (arm band) around an arm. In addition, a symmetrical method is adopted in which a pulse pressure applied from the arm to the cuff is detected to measure the blood pressure. And
In this electronic sphygmomanometer, not only the blood pressure is measured but also the number of detected pulse pressures within a predetermined time is measured as a pulse rate and displayed together with the blood pressure value.

[0003]

However, in the conventional electronic sphygmomanometer, for example, a missing pulse pressure is detected,
Even when the measured blood pressure value and the measured pulse rate are affected, it is not possible to know whether the displayed blood pressure value and the pulse rate are reliable measurement data.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a blood pressure measurement apparatus, a blood pressure measurement method, and a blood pressure measurement processing program capable of evaluating the reliability of measured blood pressure related data. An object of the present invention is to provide a recording medium on which is recorded.

[0005]

That is, a blood pressure measuring device according to a first aspect of the present invention is a blood pressure measuring device for measuring a blood pressure, and a blood pressure measuring interval for measuring a blood pressure by the blood pressure measuring device. A pulse interval measuring means for measuring, and a measured blood pressure evaluating means for evaluating a blood pressure measurement value measured by the blood pressure measuring means, based on a pulse generation interval measured by the pulse interval measuring means and predetermined formula data, It is characterized by having.

That is, in the blood pressure measuring device according to the first aspect of the present invention, the blood pressure is measured by the blood pressure measuring means.
The pulse generation interval is measured, and the blood pressure measurement value measured by the blood pressure measurement means is evaluated based on the pulse generation interval and predetermined formula data. Sex and arrhythmias can be evaluated.

A blood pressure measurement device according to a second aspect of the present invention is the blood pressure measurement device according to the first aspect,
Calculating means for calculating the measurement blood pressure evaluation means based on the pulse generation interval measured by the pulse interval measuring means and predetermined formula data; An evaluation means for evaluating a blood pressure measurement value measured by the blood pressure measurement means according to the measurement evaluation index calculated by the means.

That is, in the blood pressure measurement device according to the second aspect of the present invention, a measurement evaluation index indicating the reliability of the measured blood pressure based on the pulse generation interval measured by the pulse interval measurement means and predetermined formula data. Is calculated, and the blood pressure measurement value measured by the blood pressure measurement means is evaluated in accordance with the measurement evaluation index. For example, the reliability and the possibility of arrhythmia associated with missing detection of a pulse are quantified and evaluated. You can do it.

A blood pressure measuring device according to a third aspect of the present invention is the blood pressure measuring device according to the second aspect,
The evaluation means may be a judgment means for judging the reliability of the blood pressure measurement value measured by the blood pressure measurement means according to the measurement evaluation index calculated by the calculation means.

That is, in the blood pressure measurement device according to a third aspect of the present invention, the reliability of the blood pressure measurement value measured by the blood pressure measurement means is determined according to the measurement evaluation index calculated by the calculation means. Therefore, for example, the reliability of the measured blood pressure can be determined from a measurement evaluation index that quantifies the reliability associated with missing pulse detection and the possibility of arrhythmia.

A blood pressure measuring apparatus according to a fourth aspect of the present invention is the blood pressure measuring apparatus according to any one of the first to third aspects, and further includes the blood pressure measuring means. A display unit for displaying the evaluation result by the evaluation unit together with the blood pressure measurement value is provided.

That is, in the blood pressure measurement device according to the fourth aspect of the present invention, the evaluation result by the evaluation means is displayed together with the blood pressure measurement value measured by the blood pressure measurement means. The reliability and the possibility of arrhythmia can be reported in parallel.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a blood pressure measurement device according to an embodiment of the present invention.

This blood pressure measurement device includes a CPU (control unit) 11 composed of a computer or the like. The CPU (control unit) 11 responds to key input data input from the key input unit 12 or pressure data detected from the cuff (arm band) 21 by the pressure sensor 18 via the tube 21a.
The system program stored in advance in the OM 13 is started, or the blood pressure measurement device control program stored in the external storage medium 15 is read and started by the external storage reading unit 14, and the RAM 16 is used as a work memory to operate each circuit unit. Is performed.

The CPU (control section) 11 is connected to the key input section 12, the pressure sensor 18, the ROM 13, the external storage reading section 14, the RAM 16, and the pressurizing device 1
7. The constant speed exhaust valve 19, the safety valve 20, and the display device 22 are connected.

A key input section 12 has an "ON / OFF" key 1 for turning on / off the power of the blood pressure measuring apparatus.
2a and "STAR" for instructing the start of blood pressure measurement
A "T" key 12b is provided.

The ROM 13 stores in advance the system program data for the blood pressure measurement process shown in FIGS. 3 and 4 in the present blood pressure measurement device, and also displays display screen data and display characters associated with the blood pressure measurement process. Data and the like are stored in advance.

FIG. 2 is a diagram showing a data storage area provided in the RAM 16 of the blood pressure measuring device. RAM16
Includes a systolic blood pressure data storage unit 16a, a diastolic blood pressure data storage unit 16b, a pulse interval data storage unit 16c, a pulse data storage unit 16d, an average pulse interval data storage unit 16e, a formula data storage unit 16f, and an evaluation index data storage unit 16g. , A timer data storage unit 16h, a work data storage unit 16i, and the like.

The systolic blood pressure data storage unit 16a and the diastolic blood pressure data storage unit 16b store the systolic blood pressure value Pmax and the diastolic blood pressure value Pmin measured in the blood pressure measurement process in FIG. 3, respectively.

The pulse interval data storage section 16c sequentially stores pulse interval times t1, t2,..., Tn measured by detecting individual pulse pressure intervals in the blood pressure measurement process in FIG.

The pulse data storage section 16d stores the pulse rate Np measured by counting the number of pulse pressure detections within a predetermined time accompanying the blood pressure measurement processing in FIG. The average pulse interval data storage unit 16e stores the pulse interval data storage unit 16
c, all the pulse interval times t1, t2,.
average pulse interval time tave obtained by dividing tn by the number n of pulse interval measurements
Is stored.

The formula data storage unit 16f stores the blood pressure data storage units 16a and 16b and the pulse data storage unit 16d.
Blood pressure values Pmax and Pmin and pulse rate Np measured and stored in
The arithmetic expression [see equation (1)] of the measurement evaluation index r for numerically evaluating the reliability of is stored.

R = {abs (t1−tave) + abs (t2−tave) +... + Abs (tn−tave)} / n · tave Expression (1) where abs represents an absolute value.

The evaluation index data storage section 16g stores a measurement evaluation index r calculated and calculated according to the evaluation index calculation equation [see equation (1)] stored in the equation data storage section 16f.

The timer data storage section 16h stores a predetermined time To (= 1 min) for measuring the pulse and a fixed time Tc (> tmax) for determining the stop of the pulse pressure detection. In the work data storage unit 16i, various data input and output by the CPU (control unit) 11 in association with the blood pressure measurement process are temporarily stored as needed.

The pressurizing device 17 is provided with a cuff (arm band) 2 via a tube 21a in accordance with a command from the CPU (control unit) 11.
1 is a device that feeds compressed air to 1 and pressurizes it. The pressure sensor 18 detects a pressure value applied to the inside of the cuff (arm band) 21 through a tube 21a, and detects a CPU (control unit).
11 is a sensor to notify.

The constant-speed exhaust valve 19 includes a CPU (control unit) 11
Open the constant-speed exhaust valve in response to a command from the cuff (armband) 2
1 is a valve device for exhausting the compressed air in 1 at a constant speed. Safety valve 2
Reference numeral 0 denotes a valve device that opens an exhaust valve in response to a command from the CPU (control unit) 11 and exhausts all air in the cuff (arm band) 21 at high speed.

The display device 22 displays the highest and lowest blood pressure values Pmax, Pmax,
The judgment results of Pmin, pulse rate Np, and measurement evaluation index r are displayed.

Next, the operation of the blood pressure measuring device having the above configuration will be described. FIG. 3 is a flowchart showing a blood pressure measurement process in the blood pressure measurement device. FIG. 4 is a flowchart showing an evaluation index determination process accompanying the blood pressure measurement process of the blood pressure measurement device.

With the cuff (arm band) 21 wound around the subject's arm, the "ON / OFF" key 12
When the power is turned on by “a” and the “START” key 12b is operated to instruct the start of blood pressure measurement, R
The blood pressure measurement process in FIG. 3 is started by the system program data stored in the OM 13 in advance or the blood pressure measurement device control program data read from the external storage medium 15 via the external storage reading unit 14.

Then, first, the pressurizing device 17 is driven in response to a pressurizing command signal from the CPU (control unit) 11, and the pressure value in the cuff (arm band) 21 notified and detected by the pressure sensor 18 is set to a predetermined value. Cuff (arm band) 2 from the pressurizing device 17 via the tube 21a until the initial pressurizing pressure value of
When the internal pressure of the cuff (arm band) 21 wound around the arm of the subject is increased to a predetermined initial pressure value, the CPU (control unit) )
The constant-speed exhaust valve 19 is driven in response to the constant-speed exhaust command signal from the engine 11, and the compressed air in the cuff (arm band) 21 is exhausted at a constant speed, and the pressure value is reduced at a constant speed (step S2).

Then, in a state where the pressure value in the cuff (arm band) 21 detected and notified by the pressure sensor 18 is reduced at a constant speed, the pressure value in the cuff (arm band) 21 and the cuff ( The pulse pressure transmitted to the arm band 21 is balanced and the pressure sensor 1
When a pulse-like detection signal accompanying the pulse pressure is obtained from FIG.
The detected pressure value accompanying the initial detection of the pulse pressure is stored in the systolic blood pressure data storage section 16a in the RAM 16 as the systolic blood pressure value Pmax (steps S3 → S4).

Thereafter, in a state where the pressure value in the cuff (arm band) 21 is reduced at a constant speed, every time a pulse-like detection signal accompanying the pulse pressure is obtained from the pressure sensor 18, the detection is sequentially performed. , Tn, t2,..., Tn are measured, and RA
It is stored in the pulse interval data storage unit 16c in M16. At the same time, the timer data storage unit 1 in the RAM 16
The number of the pulse pressure detection signals during a predetermined time To (= 1 min) stored in 6h is counted, and the pulse rate Np is calculated as RA.
It is stored in the pulse data storage section 16d in M16 (steps S5 → S6, S7, S5).

The time during which the pulse-shaped pulse pressure detection signal from the pressure sensor 18 is not obtained is the fixed time Tc stored in the timer data storage unit 16h in the RAM 16.
(> Tmax), when it is determined that the pulse pressure from the arm has not been transmitted to the cuff (arm band) 21 at all, the detected pressure value accompanying the final detection of the pulse pressure is the minimum blood pressure value. P
The minimum blood pressure data storage unit 16b in the RAM 16 as min
(Steps S5 → S8 → S9).

Then, the safety valve 20 is driven in response to a total exhaust command signal from the CPU (control unit) 11, and all the air remaining in the cuff (arm band) 21 is exhausted at once (step S10). .

The formula data storage unit 1 in the RAM 16
The pulse interval times t1, t2,..., Tn stored in the pulse interval data storage section 16c in the RAM 16 are read out according to the arithmetic expression [see expression (1)] stored in 6f. Average pulse interval time tave [= (t1 + t2 + ...
+ Tn) / n] is calculated and the average pulse interval data storage unit 16
e, and each pulse interval time t1, t2,
.., Tn, the average pulse interval time tave, and the number n of pulse interval measurements are substituted for each, and the measurement evaluation index r is calculated. This measurement evaluation index r is stored in the evaluation index data storage unit 16g in the RAM 16 (step S11).

Then, when the measurement evaluation index r calculated in step S11 by the evaluation index determination process in step SA is equal to or smaller than “0.5” (r ≦
0.5), there is no possibility of missing pulses in the pulse pressure detection, and the pulse interval times t1, t2,.
Since tn is also extremely stable, it is determined that there is no arrhythmia / reliability A (step A1 → A2).

If the measurement evaluation index r calculated in step S11 is larger than "0.5" and equal to or smaller than "1" (0.5 <r≤1), the pulse in the pulse pressure detection is determined. Since there is little possibility that the omission occurs, and the pulse interval times t1, t2,..., Tn are relatively stable, it is determined that "arrhythmia small / reliability B" (step A1 → A3). ).

Further, when the measurement evaluation index r calculated in step S11 is larger than "1" (1 <
r), there is a possibility that a pulse is missing in the pulse pressure detection, or the pulse interval times t1, t2,.
Since n may be unstable, “Arrhythmia large and reliability C”
Is determined (step A1 → A4).

Then, the systolic blood pressure values Pmax and Pmax stored in the blood pressure data storage units 16a and 16b in the RAM 16 are obtained.
The diastolic blood pressure value Pmin and the pulse rate Np stored in the pulse data storage unit 16d are read out, displayed on the display device 22, and determined based on the measurement evaluation index r.
Different index judgment results are displayed on the display device 22 depending on the value of the measurement evaluation index r (step S12).

Thus, whether or not the measured and displayed maximum and minimum blood pressure values Pmax and Pmin and the pulse rate Np are reliable measurement data is determined by measuring each pulse interval time measured with the pulse pressure detection. According to the measurement evaluation index r calculated based on t1, t2,..., tn, the user can be easily notified.

Therefore, according to the blood pressure measurement device having the above-described configuration, the cuff (arm band) 21 wound around the arm of the subject is supplied with compressed air by the pressurizing device 17 to increase the pressure to a predetermined initial pressure value. After the pressure has been reduced, the systolic blood pressure value Pmax, the diastolic blood pressure value Pmin, the pulse rate Np, the pulse interval time are determined based on the individual pulse pressures detected by the pressure sensor 18 in a state where the pressure is reduced at a constant speed by the constant speed exhaust valve 19. t1, t2,... tn are measured and RA
Maximum and minimum blood pressure data storage units 16a and 16 in M16
b, pulse data storage section 16d, pulse interval data storage section 16
c, and based on the pulse interval times t1, t2,..., tn, the evaluation index r of each measurement data is calculated and calculated according to the equation (1). Since the blood pressure values Pmax, Pmin and the measured pulse rate Np are displayed on the display device 22 to notify the user, for example, when a missing pulse pressure is detected and the measured blood pressure value or the measured pulse rate is affected, Can determine whether the displayed blood pressure value or pulse rate is reliable measurement data.

In the above embodiment, the measurement evaluation index r
The determination result of the reliability of the measurement data based on the measurement data is displayed on the display device 22 together with each measurement data to notify the user, but the determination result of the reliability based on the measurement data and the measurement evaluation index r is, for example, The information may be transmitted to a medical institution online to prompt a doctor to make a diagnosis.

When the reliability of the measurement data is doubtful, for example, when the measurement evaluation index r is larger than "1", message data for prompting re-measurement may be displayed.

The techniques described in the above embodiment, ie, the blood pressure measurement processing shown in the flowchart of FIG. 3 and the evaluation index judgment processing accompanying the blood pressure measurement processing shown in the flowchart of FIG. Stored in an external storage medium 15 such as a memory card (ROM card, RAM card, etc.), a magnetic disk (floppy disk, hard disk, etc.), an optical disk (CD-ROM, DVD, etc.), a semiconductor memory, etc. And can be distributed. Then, the computer reads the program recorded in the external storage medium 15 by the external storage reading unit 14, and controls the operation by the read program, thereby realizing the blood pressure measurement evaluation function described in the above embodiment. However, similar processing can be performed by the above-described method.

[0046]

As described above, according to the blood pressure measurement device according to the first aspect of the present invention, the pulse generation interval is measured along with the blood pressure measurement by the blood pressure measurement means. Based on this, the blood pressure measurement value measured by the blood pressure measurement means is evaluated, so that it is possible to evaluate, for example, reliability and arrhythmia associated with missing pulse detection.

Further, according to the blood pressure measuring device of the second aspect of the present invention, a measurement evaluation index indicating the reliability of the measured blood pressure is calculated based on the pulse generation interval measured by the pulse interval measuring means. Since the blood pressure measurement value measured by the blood pressure measurement means is evaluated according to the measurement evaluation index, it is possible to numerically evaluate, for example, the reliability associated with missing pulse detection and the possibility of arrhythmia.

Further, according to the blood pressure measurement device according to claim 3 of the present invention, the reliability of the blood pressure measurement value measured by the blood pressure measurement means is determined according to the measurement evaluation index calculated by the calculation means. Therefore, for example, the reliability of the measured blood pressure can be determined from a measurement evaluation index that quantifies the reliability associated with missing pulse detection and the possibility of arrhythmia.

Further, according to the blood pressure measuring device according to the fourth aspect of the present invention, since the evaluation result by the evaluation means is displayed together with the blood pressure measured by the blood pressure measuring means, the measured blood pressure measurement value The reliability and the possibility of arrhythmia can be reported in parallel. Therefore, according to the present invention, it is possible to evaluate the reliability of the measured blood pressure-related data.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a blood pressure measurement device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a data storage area provided in a RAM of the blood pressure measurement device.

FIG. 3 is a flowchart showing a blood pressure measurement process in the blood pressure measurement device.

FIG. 4 is a flowchart showing an evaluation index determination process accompanying the blood pressure measurement process of the blood pressure measurement device.

[Explanation of symbols]

11: CPU, 12: Key input unit, 12a: "ON / OFF" key, 12b: "START" key, 13: ROM, 14: External storage reading unit, 15: Storage medium, 16: RAM, 16a: Systolic blood pressure Data storage unit (Pmax), 16b ... diastolic blood pressure data storage unit (Pmin), 16c ... pulse interval data storage unit (t1, t2, ..., tn)
), 16d: pulse data storage unit (Np), 16e: average pulse interval data storage unit (tave), 16f: formula data storage unit (measurement evaluation index calculation formula), 16g: evaluation index data storage unit (r), 16h ... Timer data storage unit (To, Tc), 17 ... Pressure device, 18 ... Pressure sensor, 19 ... Constant speed exhaust valve, 20 ... Safety valve, 21 ... Cuff (arm band), 21a ... Tube, 22 ... Display device.

Claims (6)

[Claims] 1. A blood pressure measuring means for measuring blood pressure, a pulse interval measuring means for measuring a pulse generation interval when measuring the blood pressure by the blood pressure measuring means, and a pulse interval measured by the pulse interval measuring means. A blood pressure measuring device comprising: a blood pressure measuring means for evaluating a blood pressure measurement value measured by the blood pressure measuring means based on an occurrence interval and predetermined formula data. 2. The measurement blood pressure evaluation means calculates a measurement evaluation index indicating the reliability of the measured blood pressure based on a pulse generation interval measured by the pulse interval measurement means and predetermined formula data. Means, according to the measurement evaluation index calculated by the calculating means,
The blood pressure measurement device according to claim 1, further comprising an evaluation unit that evaluates a blood pressure measurement value measured by the blood pressure measurement unit. 3. The method according to claim 2, wherein the evaluation unit is a determination unit that determines reliability of the blood pressure measurement value measured by the blood pressure measurement unit according to the measurement evaluation index calculated by the calculation unit. The blood pressure measurement device according to claim 2. 4. A blood pressure measurement value measured by the blood pressure measurement means,
The blood pressure measurement device according to claim 1, further comprising a display unit that displays an evaluation result obtained by the evaluation unit. 5. A blood pressure measurement procedure for measuring blood pressure, a pulse interval measurement procedure for measuring a pulse generation interval in accordance with the blood pressure measurement in the blood pressure measurement procedure, and a pulse interval measured in the pulse interval measurement procedure. A blood pressure measurement method comprising: a measurement blood pressure evaluation procedure for evaluating the reliability of a blood pressure measurement value measured in the blood pressure measurement procedure based on an occurrence interval and predetermined formula data. 6. A recording medium recording a blood pressure measurement processing program for controlling a computer having a pulse pressure detection function, comprising: a computer for measuring blood pressure based on a detected pulse pressure; Along with the measurement of blood pressure by the measuring means, a pulse interval measuring means for measuring a pulse generating interval, based on the pulse generating interval measured by the pulse interval measuring means and predetermined formula data, the blood pressure measuring means Measurement blood pressure evaluation means for evaluating the measured blood pressure measurement value,
A recording medium storing a blood pressure measurement processing program for functioning as a computer.