JPH0354724Y2 - - Google Patents

Description

[Detailed description of the invention] Background of the invention (1) Technical field The present invention relates to an electronic blood pressure monitor for recording and displaying measurement results.

(2) Prior art and its problems Conventionally, in electronic blood pressure monitors, after blood pressure measurement,
The measurement results were displayed and recorded on a liquid crystal display or printer for each measurement.

Blood pressure is something that always fluctuates, and if a value is measured only once, it cannot be determined whether the value is the person's usual blood pressure value or not. Therefore, in order to accurately understand blood pressure values, it is necessary to accumulate the results of measurements taken every few hours or every other day.
It is important to monitor changes in blood pressure values.

However, simply displaying or recording the systolic blood pressure and diastolic blood pressure values each time a measurement is performed, it is difficult to determine whether the blood pressure measurement results are higher or lower than the subject's daily values, or how much the blood pressure has fluctuated. I was not able to fully understand what was going on.

Furthermore, there are cases in which measurements are performed several times in succession within a short period of time, and in such cases, erroneous measurements are often made due to the influence of noise or the like. In other words, when continuous measurements are performed, there is a high possibility that data other than the final data are erroneous measurements.

For this reason, there are many problems in simply calculating the average value from the measurement results or creating a trend graph and using this as a reference for diagnosis.

Purpose of the invention The purpose of the invention is to solve the problems of the prior art described above by calculating the average blood pressure value by extracting necessary data from the results of multiple measurements, and by creating and displaying a trend graph. An object of the present invention is to provide an electronic blood pressure monitor with a recording device capable of measuring blood pressure fluctuation trends.

Another object of the present invention is to provide an electronic blood pressure monitor that can remove erroneous measurement data from measurement results.

Summary of the invention The above objectives of the invention are achieved by the following configuration.

That is, there is a storage means for storing the measured blood pressure value together with the measurement time, and when the blood pressure value is stored, if the blood pressure value measurement time has not passed a certain period of time from the previous measurement time stored in the storage means, the previous measurement time is stored in the storage means. This can be achieved by an electronic blood pressure monitor equipped with a deletion means for deleting the measurement results from the storage means.

Specific Description and Effects of the Invention Hereinafter, one embodiment of the invention will be described in detail with reference to the drawings.

FIG. 1 is a block configuration diagram of one embodiment of the present invention, in which 1 is a power source that supplies power to each part;
2 is a microphone attached to the cuff 8 that detects sound and vibration generated from blood vessels; 3 is a filter amplifier that shapes and amplifies the signal detected by the microphone 2; an A/D converter that converts an analog signal into a digital signal; 5 a pressure detector that detects the internal pressure of the cuff; 6 an amplifier that amplifies the signal detected by the pressure detector 5, converted to an electrical signal, and output; Reference numeral 7 denotes a control unit (CPU) that controls the entirety of the present embodiment, 8 a cuff, 9 a pressure reducing valve that reduces the pressure of the air pressurized into the cuff 8, and 10 a control unit (CPU) that controls the air in the cuff 8 under the control of the CPU 7. A pressurizing pump that presses in, 11 an exhaust valve that exhausts the air in the cuff 8 under the control of the CPU, 14
15 is a printer that prints the measurement results; and 16 is a display unit that displays the measurement results.

The CPU 7 also includes a clock 17 that generates an operating timing clock for the CPU 7, a memory 18 that holds and stores control procedures and processing progress of the CPU 7, and measurement results such as measured blood pressure values, a timer 19 that has a clock function, and a timer 19 that has a clock function. Each switch 20-23 for controlling the operation of the example is connected.

The switches include a pressure switch 20 that instructs to start pressurizing the cuff 8 and start measurement, a graph printing switch 21 that instructs the printer 15 to print a graph of the memorized measurement results in the memory 18, Exhaust switch 22 for instructing exhaust, printer 15
A measured value printing switch 23 for printing the stored measured value in the memory 18 is connected to each.
The CPU 7 executes various processes to be described later in response to each switch input.

The details of the storage area of the measurement results in the memory 18 are shown in FIG.

In the figure, 100 is a data storage unit that stores measurement data, and there are a total of M data storage units 100 (M≧
n _MAX ) cells, and each cell has a pointer F10 indicating the cell position where the next measurement data should be stored.
1. Time storage area T102 for storing measurement time;
It consists of a systolic blood pressure storage area S103 that stores the measured systolic blood pressure value, a diastolic blood pressure storage area D104 that stores the measured diastolic blood pressure value, and a pulse storage area P105 that stores the measured pulse rate.

Further, 151 is a data set register N indicating the number of cells in which measurement data is stored, and 152
is a systolic blood pressure total register SA, 15 that stores the sum of the systolic blood pressure values measured and stored in each cell.
3 is a diastolic blood pressure total register DA, 154, which indicates the sum of the diastolic blood pressure values measured and stored in each cell.
is a pulse rate total register PA indicating the sum of the pulse rates measured and stored in each cell, 155 is an average systolic blood pressure register SM that stores the average value of the systolic blood pressure values stored in each cell, and 156 is each Average diastolic blood pressure register DM stores the average value of diastolic blood pressure values stored in cells; 157 is an average pulse rate register DM that stores the average value of pulse rates stored in each cell;
PM, 158 is a print number register n that stores the number of print cells to the printer 15, 159 is a print systolic blood pressure total register Sa that stores the sum of printed systolic blood pressure values, and 160 is a print number register Sa that stores the sum of printed systolic blood pressure values. Print systolic blood pressure total register Da to be stored.

The operation of this embodiment having the above configuration will be explained below with reference to the flowcharts of FIGS. 3 to 6.

First, in step 100, initial settings such as zero adjustment of the pressure detection section 5 and voltage check of the power source 1 are performed. In the case of a power supply voltage failure (if a battery is used as the power source 1, discharge has progressed and the voltage has fallen below the specified level), a buzzer (not shown) on the display unit 15 will sound to notify you of this. is displayed on the display section 15.

When the initial settings are completed, steps 110 and 140
Waits for input from the graph print switch 21 or the pressure switch 20. When the graph printing switch 21 is input, a graph printing process to be described later in step 120 is executed, and the process proceeds to step 140. If the pressure switch 20 is pressed in step 140, the process advances to step 150, and the pressure setting switch 1 is pressed.
Read the pressurization setting value set to 2. Then, in the following step 160, the drive unit 14 is energized to close the exhaust valve 11, and the pressurizing pump 10 is activated, and in the following steps 170 and 175, the internal pressure of the cuff 8 from the pressure detecting unit 5 is measured, and the pressurization is set. Wait for the value.
If the exhaust switch 22 is input during pressurization, the process advances from step 175 to step 176, and the CPU
Step 7 energizes the drive unit 14, opens the exhaust valve 11, and exhausts the air in the cuff 8.
Return to 0.

When the cuff internal pressure reaches the set value, the process proceeds from step 170 to step 180, and the pressurizing pump 10 is stopped. After the pressurizing pump 10 is stopped, the pressure reducing valve 9
Depressurization begins due to the leakage of a smaller amount of air, and measurement begins in step 190. Microphone 2 is used to measure systolic blood pressure, diastolic blood pressure, and pulse.
It is performed in a known manner using vascular sounds and Korotkoff sounds. And the systolic blood pressure value S, the diastolic blood pressure value D,
When the measurement of pulse rate P and measurement time T is completed, in step 200, these measured values are temporarily stored in the measured value storage section 7a in the CPU 7. Then, in step 210, the drive unit 14 is energized, the exhaust valve 11 is opened, and the air in the cuff 8 is exhausted.

Then, in the following step 220, data (arithmetic) processing, which will be described later, is performed on these measured values, and in the following step 240, the processing results are displayed on the display unit 15. Thereafter, in steps 250, 270, and 290, it waits for any one of the graph printing switch 21, measured value printing switch 23, and pressure switch 20 to be input. Therefore, during this time, the processing results of the measurement results are displayed on the display section 15. If the pressure switch 20 is input here, step 15 is executed again.
It returns to 0 and starts measuring blood pressure, etc.

When the graph printing switch 21 is input, the graph printing process of step 120 is executed from step 250, and then the process proceeds to step 270. If the measured value printing switch 23 is input in step 270, the measured value printing process is performed in step 280, and then the process advances to step 290. In step 290, it is checked whether or not the pressure switch 20 has been inputted. If it has been inputted, the process returns to step 150, pressurizes the cuff 8, and starts blood pressure measurement. If the pressure switch 20 is not input, the process returns to step 250.

Next, details of the data processing in step 220 described above will be explained below with reference to FIG.

The measurement results obtained by executing this process are stored in each area in the memory 18 shown in FIG.

In the data processing, first, in step 211, the pointer F101 is checked, and the measurement time of the cell to which the pointer is set (that is, the cell in which the immediately previous measurement result is stored) is determined.
Read T′. Then, in the following step 212, the CPU
The difference ΔT from the current measurement time T stored in the measurement value storage unit 7a of No. 7 is calculated. Continued step 21
3, ΔT and preset predetermined time To and ΔT
If ΔT is larger, the previous measurement result is regarded as an erroneous measurement result, and the process proceeds to step 214 and subsequent steps to erase the previous measurement result. First, in step 214, the systolic blood pressure value S', the diastolic blood pressure value D', and the pulse rate P' of the cell set at the pointer F101 are subtracted from the systolic blood pressure total register SA152, the diastolic blood pressure total register DA153, and the pulse rate total register PA154. Then, in step 215, the cell pointer position is changed and set to the previous cell, and the process proceeds to step 220.

On the other hand, in step 213, the time ΔT is changed to the predetermined time To.
If this is the case, the process proceeds to step 216, where it is checked whether all the measured data are stored in each cell (1 to M) of the data storage unit 100 (full). Specifically, this is done by checking whether the value "N" held in the data set register 151 is equal to the number "M" of cells in the data storage section 100. If it is not full, proceed to step 217, increment the data set register 151 by one, and proceed to step 2.
Proceed to step 20.

If it is full in step 216, the process advances to step 218, where the oldest measurement data among the already stored measurement data is deleted. That is, the systolic blood pressure total register SA152, the diastolic blood pressure total register DA153, and the pulse rate total register
From the PA154, the systolic blood pressure value S'' of the measurement data stored in the cell at the (pointer position + 1) position,
Subtract the diastolic blood pressure value D″ and pulse rate P″. The process then proceeds to step 220.

In step 220, first (pointer position +1)
The current measured values (systolic blood pressure value S, diastolic blood pressure value D, pulse P, measurement time T) stored in the measured value storage section 7a in the CPU 7 are written in the cell at the position. In the following step 221, the systolic blood pressure total register SA1
52. Add the currently measured systolic blood pressure value S, diastolic blood pressure value D, and pulse rate P to the diastolic blood pressure total register 153 and the pulse rate total register PA154, and in step 222 add the systolic blood pressure total register SA152 and the minimum Blood pressure total register DA153 and pulse rate total register PA15
Divide the contents of 4 by the value "N" held in the data set register 151 to obtain the average values of the systolic blood pressure value S, diastolic blood pressure value D, and pulse rate P.
DM156 and average pulse rate register PM157
Store in. Then, in the following step 223, the set position of the pointer F101 is changed to the position (cell position where the current pointer is set+1), and the data processing is ended.

Through the above processing, the measurement data is stored sequentially starting from cell 1, and when M cells are full, the next measurement data is stored in cell 1 again. At this time, at the same time as the measurement data is stored, a pointer is set in the stored cell, and new measurement data is always stored in the cell next to the cell in which the pointer was set.

Next, details of the graph printing process 120 will be explained with reference to the flowchart of FIG.

First, in step 121, the pointer position in the data storage section 100 is read out and stored in a read address register (hereinafter referred to as RA) of the CPU 7 (not shown). Then, in step 122, the print number register 15 is
6 is set to "1", and in step 123, the print systolic blood pressure total register Sa159 and the print diastolic blood pressure total register Da160 are set to "0".
Clear to. Then, in step 124, prior to printing the measured data, a pulse rate display on the vertical axis shown at 40 in FIG. 7, which will be described later, is printed to prepare for printing the measured data.

In the following step 125, each measurement data is read from the cell at the position indicated by RA of the CPU 7. Then, in step 126, this measurement data is sent to the printer 15.
Print out more. An example of printing in this graph printing mode is shown in FIG.

The measurement data is printed in chronological order on a graph, with the vertical axis representing the blood pressure value and the horizontal axis representing the time of measurement, starting from the most recent measurement time. here,
40 is an axis graph representing the range between the systolic blood pressure value 41 and the diastolic blood pressure value 42 of the measured blood pressure values, and the systolic blood pressure value and the diastolic blood pressure value at the time of measurement are shown so that they can be recognized at a glance. There is. In addition to the blood pressure value, the vertical axis shows the pulse rate 43 in (beats/minute). When one print (one cell) is finished, step 1
Proceed to step 27 to print the total systolic blood pressure register record.
Sa159 and print diastolic blood pressure total register Da
The systolic blood pressure value S and the diastolic blood pressure value D, which have been printed out, are added to step 160, and the process proceeds to step 128.

In step 128, it is checked whether or not the graph print switch 21 is input. If it is not input, the process advances to step 129, where the print number register n1 is set.
It is checked whether the value of 56 and the value of data set register 151 are equal. If they are not equal, the process proceeds to step 130, where it is checked whether the print number register n156 is equal to _nMAX . In this embodiment, n _MAX is "31". If they are not equal, the process proceeds to step 131, where the print number register n156 is incremented by 1, and in the following step 132, the RA of the CPU 7 is set to 1.
Decrement by one. and in step 133
It is checked whether RA is "0" or not, and if it is "0", in step 134 RA is set to "M", the number of cells in the data storage section 100, and the process returns to step 125, and the next (previous one printed this time) is printed. Print the measurement data.

If the graph print switch 21 is input in step 128, if the print number register n156 is equal to the data set register 151 in step 129, and if the print number register n156 is equal to n (31 in the embodiment) in step 130, In order to finish printing the measurement data, the program proceeds to step 135 and prints the vertical axis blood pressure value display frame shown at 45 in FIG. Each is divided by the value n of the print number register n156 to find the average value of the printed measurement data. Then, the average value obtained in step 137 is printed as a character as shown in FIG. 746. Then, the process ends and returns to the main process.

By printing out the data in this way, in order to accurately understand the blood pressure value, which is always changing, it is possible to accumulate the results of measurements taken every few hours or every other day and see the fluctuations in the blood pressure value. I can do it. In particular, blood pressure values change sensitively depending on one's psychological state, and become temporarily high when one is nervous. For this reason, when blood pressure is measured by a doctor or during a group medical checkup, it becomes high, and it is not possible to accurately know the normal blood pressure value of the person taking the measurement, and patients who are easily nervous are not given antihypertensive drugs. If you use it, you could end up making your health worse. As shown in Figure 7, by measuring blood pressure values over a long period of time and displaying them simultaneously, fluctuations in blood pressure values can be accurately and easily grasped, and the average blood pressure value is also displayed.
You can make more accurate judgments.

Next, the measurement value printing process in step 280 will be explained below with reference to the flowchart of FIG.

When the measurement value print switch 23 is input, first, in step 281, the position of the cell where the pointer F101 is set among the cells of the data storage section 100 is checked, and in the following step 282, the cell position where the pointer is set is measured. Read data.
Then, in step 283, the read measurement data is printed as a character.

Incidentally, FIG. 8 shows an example of the measured data printed out by this measured value printing process.

In this embodiment, as character printing,
The "measurement date and time data", "systolic blood pressure blood value", "diastolic blood pressure value", and "pulse rate" measured by the timer 19 are printed numerically.

In step 283, all data stored in the cells are printed in characters, as shown at 81 in FIG. Next, in step 284, the process shown in FIG.
The pulse rate display on the vertical axis shown in 2 is printed and preparations are made to print the graph of the measured data. Then, in step 285, the average systolic blood pressure register SM155, the average diastolic blood pressure register DM156, and the average pulse rate register are
Each average value stored in the PM 157 is printed in the form of a bar graph as shown in FIG. 83. Next, in step 0286, the current (previously) measured data printed out in step 283 is printed in the form of a bar graph as shown at 84 in FIG. Then, in the following step 287, the blood pressure value display frame on the vertical axis shown at 85 in FIG. 8 is printed, the process is ended, and the process returns to the main process.

What is shown at 86 in FIG. 8 is that when the vertical axis (blood pressure value) is set in the width direction of the recording paper that is preprinted on the recording paper used in this embodiment,
This is an appropriate blood pressure area display band indicating the blood pressure value position of the WHO reference value.

For example, the WHO blood pressure ranges are systolic blood pressure of 160 mmHg or higher, diastolic blood pressure of 95 mmHg or higher, and systolic blood pressure of 140 mmHg to 160 mm.
The borderline hypertensive region includes both Hg and diastolic blood pressure values of 90 mmHg to 94 mmHg, and the normal blood pressure region includes systolic blood pressure values of 139 mmHg or less and diastolic blood pressure values of 89 mmHg or less.

As explained above, according to this embodiment, 1. By providing the recording function and the memory function,
It is now possible to automatically output temporal fluctuation trends in blood pressure in the form of a graph, and
The average value of past measurements is also automatically output, allowing you to know the average value along with the trend graph. Therefore, using this as a guide, it is possible to easily recognize whether the current measurement result is higher or lower than usual.

2. When a second measurement is taken within a certain period of time, the previous measurement data is automatically erased. (e.g.) or for other reasons, it is possible to automatically delete unnecessary data and store only correct data as trend data.

Specific effects of the invention As explained above, according to the invention, even if blood pressure is incorrectly measured, the incorrect measurement data can be automatically erased as long as the blood pressure is measured again within a certain period of time. , accurate measurement results can be obtained.

Moreover, for this reason, the average blood pressure of the person to be measured and the current blood pressure trend state can also be grasped at the same time.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram of an embodiment of the present invention, FIG. 2 is a diagram showing the storage state of measurement results in the memory of this embodiment, and FIGS. 3 to 6 are control operations of this embodiment. Flowchart, FIG. 7 is a diagram showing an example of printing measurement results in the graph printing process of this embodiment,
FIG. 8 is a diagram showing an example of printing measurement results in the measurement value printing process of this embodiment. Explanation of symbols, 2...Microphone, 5...Pressure detection unit, 7...CPU, 8...Archive, 9...Pressure reduction valve, 10...Pressure pump, 11...Exhaust valve, 14...Printer , 15...Printer, 16
... Display section, 18 ... Memory, 20 ... Pressure switch, 21 ... Graph printing switch, 22 ... Exhaust switch, 23 ... Measurement value printing switch, 10
0...Data storage section.

Claims (1)

[Scope of utility model registration request] An electronic sphygmomanometer that measures and displays systolic blood pressure values and diastolic blood pressure values includes a storage means for storing the measured blood pressure value together with the measurement time, and a storage means for storing the blood pressure value measurement time in the previous time when the blood pressure value measurement time was stored in the storage means. If a certain period of time has not passed since the measurement time of
An electronic blood pressure monitor characterized by comprising: a deletion means for deleting the previous measurement result from the storage means.