JPH0532081Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a portable blood pressure monitoring device, in particular,
The present invention relates to a device that measures and records the exercise intensity of a living body along with blood pressure values.

Prior Art Blood pressure values in living organisms usually have relatively large diurnal fluctuations, so when making a diagnosis, etc., a portable blood pressure monitor device is attached to the person being measured, and blood pressure values are usually measured in units of ten minutes to tens of minutes. Continuous measurement and recording is performed at predetermined measurement intervals. In this case, in order to accurately and easily elucidate the causes of fluctuations in blood pressure values, it has been desired to directly grasp the state of motion of the living body at the time of blood pressure measurement.

Problems to be solved by this invention In contrast, as described in Japanese Patent Application Laid-Open No. 50-30380, the vibration of a living body is detected and an analog vibration waveform representing the amplitude of the vibration signal is generated for a certain period of time. Techniques for recording data over a period of time are known.
However, even if such technology were to be applied to the above-mentioned blood pressure monitoring device, it would only be possible to obtain a device in which the analog vibration waveform itself representing the state of movement of the living body is recorded together with the blood pressure value, and it would be difficult for unskilled personnel to do so. However, this method had the disadvantage that it was not possible to quantitatively read the exercise intensity value and its changes from the analog vibration waveform, and that it was not possible to accurately analyze changes in blood pressure values based on the exercise intensity.

The present invention was developed against the background of the above circumstances, and its purpose is to be able to accurately evaluate exercise intensity values and their changes without requiring any skill, and to identify the causes of changes in blood pressure values based on exercise intensity. It is an object of the present invention to provide a portable blood pressure monitoring device that can accurately perform elucidation.

Means for Solving the Problems The gist of the present invention to achieve the above object is to provide a mobile device that is attached to a living body and continuously measures and records the blood pressure value of the living body at a predetermined measurement cycle. A blood pressure monitoring device for use, comprising (a) a vibration sensor that detects vibrations of the living body and outputs a vibration signal representing the vibrations, and (b) an integration per unit time of the vibration signals output from the vibration sensor. (c) an exercise intensity determining means that sequentially determines the exercise intensity of the living body at a predetermined period shorter than the measurement period of the blood pressure value by determining the blood pressure value; and a recording means for recording the same.

In this way, the exercise intensity determining means calculates the integrated value per unit time of the vibration signal output from the vibration sensor, and thereby detects the vibration of the living body at a predetermined period shorter than the measurement period of the blood pressure value. The exercise intensity value of is determined sequentially, and the exercise intensity is continuously recorded along with the blood pressure value by the recording means. Therefore, by accurately obtaining and recording the exercise intensity value of the living body, the exercise intensity value and its changes can be evaluated more accurately than with a device that simply records the analog vibration waveform of the living body along with the blood pressure value. It will also be possible to accurately elucidate the causes of fluctuations in blood pressure values based on exercise intensity.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

FIG. 1 is a diagram showing a control circuit of a portable blood pressure monitoring device to which the present invention is applied, and 10 is a cuff that is wrapped around the upper arm of a human body. The cuff 10 includes a pressure sensor 12, a cylinder 14, and the cylinder 1.
4, a solenoid valve 16 that controls opening and closing, and a throttle 1 for slow exhaust.
8, a solenoid valve 20, and a solenoid valve 22 for rapid exhaust are connected via piping 24, respectively. The pressure sensor 12 generates a pressure signal SP representing the pressure inside the cuff 10.
is supplied to the static pressure discrimination circuit 26 and the pulse wave discrimination circuit 28. The static pressure discrimination circuit 26 includes a low-pass filter, and by discriminating a signal representing a steady pressure included in the pressure signal SP, a cuff pressure signal SK representing the pressure in the cuff 10 is sent via the A/D converter 30. Supplied to CPU32. The pulse wave discrimination circuit 28 is
For example, it includes a bandpass filter that passes signals having frequency components of about 1 to 10 Hz, and the pressure signal
By discriminating the pulse wave signal included in SP,
A pulse wave signal SM representing a pulse wave is supplied to the CPU 32 via the A/D converter 30. This pulse wave is a pressure vibration of the cuff 10 that occurs in synchronization with the subject's heartbeat.

A clock circuit 34 is provided in the control circuit, and the clock circuit 34 receives a time signal indicating the current time.
ST is always supplied to the CPU 32. The CPU 32 is
It constitutes an arithmetic control device together with ROM 36, RAM 38, etc., and is connected to ROM 36, RAM 38, output interface 40, and card writing device 42 via a data bus line, and programs stored in advance in ROM 36 Accordingly, signal processing is executed using the memory function of the RAM 38, and drive signals MV1, MV2, MV3 are output from the output interface 40 to drive the solenoid valves 16,
20 and 22, respectively, execute a series of blood pressure measurement operations, determine the blood pressure value based on the pulse wave signal SM and the cuff pressure signal SK, and write the blood pressure value together with the current time on the card writing device 42.
This causes the data to be written to the memory card 44.

On the other hand, the CPU 32 receives a vibration signal SS output from a vibration sensor 46 attached to the subject.
is supplied via the A/D converter 48, and the temperature signal output from the temperature sensor 50.
STE is supplied via an A/D converter 52. The A/D converter 48 is
Sample and hold the vibration signal SS for about 3 seconds, for example, until a read command is received from the CPU 32,
It is configured to output the sampled and held vibration signal SSD, that is, the integrated value, that is, the integrated value within the sampling period, when a read command is received. Then, the CPU 32 reads the vibration signal SS and the temperature signal STE and causes the card writing device 42 to write them into the memory card 44 along with the current time. Therefore, in this embodiment, the A/D converter 48 receives the vibration signal SS.
By calculating the integrated value per unit time (for example, about 3 seconds), it functions as an exercise intensity determining means that determines the exercise intensity in a shorter cycle than the blood pressure measurement cycle, which is about ten minutes to tens of minutes. There is. This exercise intensity is the integrated value (SSD) of the vibration signal SS per unit time (3 seconds in this example), and corresponds to the amount of exercise of the subject per unit time. Further, the card writing device 42 and the memory card 44 constitute a recording means. This vibration sensor 46 detects the magnitude of vibrations generated in relation to the exercise of the subject, and for example, by being attached to the waist of the subject, it detects the movement of the waist associated with the exercise. It is something. In this case, the vibration sensor 46
For example, as shown in FIG. 3, the system includes a cantilever-shaped vibrating member 62 having a predetermined weight 60 attached to the distal end and a fixed proximal end, and the vibration of the vibrating member 62 is transmitted to the semiconductor strainer. Vibration signal detected by gauge 64 etc. and corresponding to the movement of the waist of the subject
Configured to output SS.

The operation of this embodiment will be explained below with reference to the flowchart shown in FIG.

First, the initial processing of step S1 is executed to clear the timer counter T1 for measuring blood pressure, the timer counter T2 for measuring exercise intensity and temperature, etc. Next, step S2 is executed, and it is determined whether the timer counter T2 has reached the set value TB. This set value TB is preset to a value corresponding to the exercise intensity and temperature measurement cycle (for example, about 3 seconds). Initially, since the set value TB is not reached, steps S3 and S4 are executed and 1 is added to timer counter T2 and timer counter T1, respectively, and steps S2 to S4 are repeatedly executed, but when the set value TB is reached, steps S3 and S4 are executed. S5 is executed. In step S5, it is determined whether the timer counter T1 has reached the set value TA. This set value TA is preset to a value corresponding to the blood pressure measurement cycle (for example, about 5 to 10 minutes). Initially, the set value TA will not be reached, so the step
S6 is running vibration signal SSD and temperature signal
STE is loaded. Next, by executing step S7, the exercise intensity data, which is the integral value per unit time (SSD) of the vibration signal SS inputted from the A/D converter 48, and the temperature data are stored on the card together with the current time. The data is written to the memory card 44 by the writing device 42. Then, step S8 is executed to reset the timer counter T2, and steps S2 to S8 are repeatedly executed until the timer counter T1 reaches the set value TA in step S5, and the exercise intensity and temperature are adjusted every predetermined time. are measured and recorded on the memory card 44 together with time data.

If it is determined in step S5 that the timer counter T1 has reached the set value TA, the step
S9 is executed and the solenoid valve 16 is activated by the drive signal MV1.
is opened and the cylinder 14 starts pressurizing the cuff 10. Next, step S10 is executed to determine whether or not the cuff pressure P exceeds a predetermined constant target cuff pressure Pm.
This target cuff pressure Pm is a pressure that is sufficiently higher than the systolic blood pressure value, for example, a value of about 180 mmHg. When cuff pressure P has not yet exceeded target cuff pressure Pm, steps S9 and S10 are repeatedly executed, but when cuff pressure P exceeds target cuff pressure Pm, step S11 is executed and drive signal MV1 is output. The solenoid valve 16 is brought into a closed state, and the drive signal MV2 is output, so that the solenoid valve 20 is brought into an open state.
As a result, gradual pressure reduction of the cuff 10 is started. In the subsequent blood pressure value determination routine of step S12, the pulse wave signal in the process of lowering the cuff pressure P is
A so-called oscillometric blood pressure value determination algorithm is executed to determine the systolic blood pressure value and diastolic blood pressure value based on changes in the magnitude of the pulse wave represented by the SM, and the systolic and diastolic blood pressure values are thereby determined. and those blood pressure values are stored in the RAM 38. Next, in step S13, it is determined whether the blood pressure measurement of the systolic blood pressure value and the diastolic blood pressure value has been completed.
S12 and S13 are repeatedly executed, and when it is determined that the blood pressure measurement has been completed, the following step S14 is executed and the systolic blood pressure value and diastolic blood pressure value are written to the memory card by the card writing device 42 together with the current time data. 44. Then, by executing step S15, timer counter T1 is cleared and drive signal MV3 is cleared.
is output, the solenoid valve 22 is opened, and the cuff 1 is opened.
0 is evacuated all at once, and step S2
By repeating the following steps, the blood pressure value, exercise intensity, and temperature are each measured and recorded at predetermined time intervals in the same way as in the case described above.

As described above, according to this embodiment, in addition to measuring the blood pressure of the subject, the exercise intensity and temperature are sequentially measured at a predetermined period shorter than the blood pressure measurement period, and the measured blood pressure value and exercise intensity are , and the temperature are written to the memory card 4 by the card writing device 42.
4, the data written in the memory card 44 can be input to another information processing device via a card reader or the like to record temporal changes in blood pressure, exercise intensity, and temperature. Graphs on a common time axis can be displayed on a CRT or chart. As a result, by looking at exercise intensity fluctuation data and temperature fluctuation data together with diurnal fluctuations in blood pressure values, it is possible to analyze a series of measured blood pressure values more accurately and easily than in the past. FIG. 4 shows an example of display of the above fluctuation data.

Moreover, in the portable blood pressure monitoring device of this embodiment, the exercise intensity value and its changes are determined and recorded for display together with the blood pressure value.
Compared to the case where the analog waveform of the vibration signal SS is simply recorded and displayed, there is an advantage that the exercise intensity value and its changes can be evaluated accurately, and the cause of the fluctuation in blood pressure value based on the exercise intensity can be accurately clarified.

In addition, in the above-mentioned embodiment, the temperature sensor 50
is not necessarily necessary, and the effect of the present invention can be obtained even if it is deleted.

Furthermore, in the above-described embodiment, it is of course possible to measure heart rate in addition to exercise intensity and temperature.

In addition, various changes may be made to the present invention without departing from the spirit thereof.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a control circuit of a portable blood pressure monitor device which is an embodiment of the present invention.
FIG. 2 is a flowchart illustrating the operation of the embodiment shown in FIG. FIG. 3 is a sectional view showing a vibration sensor included in the device of FIG. 1. FIG. 4 is a diagram showing a display example of fluctuation data such as blood pressure values and exercise intensity values. 42... Card writing device (recording means), 44...
...Memory card (recording means), 46...Vibration sensor, 48...A/D converter (exercise intensity determining means).

Claims (1)

[Claims for Utility Model Registration] A portable blood pressure monitoring device that is attached to a living body and continuously measures and records the blood pressure value of the living body at a predetermined measurement cycle, which detects vibrations of the living body. A vibration sensor that outputs a vibration signal representing the vibration, and an integrated value per unit time of the vibration signal output from the vibration sensor, thereby determining the exercise intensity of the living body at a predetermined period shorter than the measurement period of the blood pressure value. A portable blood pressure monitoring device comprising: exercise intensity determining means for sequentially determining the exercise intensity; and recording means for recording the exercise intensity determined by the exercise intensity determining means together with the blood pressure value.