JPH046735Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a blood pressure monitoring device, and more particularly to a device that displays a measured blood pressure value as well as the elapsed time from the time of measurement of the blood pressure value to the present.

Prior Art A blood pressure monitoring device is known that automatically determines the blood pressure value of a living body by repeatedly executing a pre-stored blood pressure measurement procedure at predetermined time intervals, for example, every 30 minutes, and displays the blood pressure value. . For example, in order to monitor the condition of a patient in an intensive care unit, it is attached to the patient, measures the patient's blood pressure value at predetermined intervals, and displays the newly obtained blood pressure value. This is what is displayed in place of the value.

Problems to be Solved by the Invention Incidentally, the blood pressure value displayed in the conventional blood pressure monitoring device is read by a monitor such as a doctor or nurse, and the condition of the patient is determined based on it. However, since it is unclear how long ago the blood pressure value displayed on the blood pressure monitoring device was measured, it has been difficult to accurately grasp the condition of the patient. For example, when a patient's condition changes, medical treatment is determined based on the blood pressure value displayed on a blood pressure monitoring device, which accurately reflects the patient's condition at that time. It is unclear whether the blood pressure value is relatively new or a relatively old blood pressure value from about the set measurement time interval (for example, 30 minutes), and remeasurement is required to ensure accuracy. be exposed. For this reason, re-measurement unnecessarily burdens the patient, and there is an unavoidable delay in the time required for medical judgment and treatment until the blood pressure value is re-measured.

Means for Solving the Problems The present invention was developed against the background of the above circumstances, and its purpose is to provide a blood pressure system that can eliminate unnecessary remeasurements and delays in medical judgment and treatment. The objective is to provide a monitoring device.

Means for Solving the Problems The gist of the present invention to achieve the above object is (a) to automatically measure the blood pressure value of a living body by repeatedly executing pre-stored blood pressure measurement procedures at predetermined time intervals; (b) blood pressure value display means that displays the blood pressure value newly determined by the blood pressure value determination means in place of the previously displayed blood pressure value; (c) (d) an elapsed time measuring means for automatically measuring the elapsed time since the blood pressure value was determined by the blood pressure value determining means; and (d) the blood pressure displaying means for displaying the elapsed time determined by the elapsed time measuring means. and an elapsed time display means for displaying the blood pressure value on the same display panel surface.

In this way, each time a blood pressure value is determined by the blood pressure value determining means, the new blood pressure value is displayed on the blood pressure value display means, and the elapsed time measuring means The elapsed time since the blood pressure value was determined is automatically measured, and the elapsed time is displayed by the elapsed time display means on the same display panel surface as the blood pressure value is displayed by the blood pressure display means. .

Effects of the invention In this way, the blood pressure value displayed on the blood pressure value display means is read by the monitor along with the elapsed time displayed on the elapsed time display means, so when the condition of the patient changes, the elapsed time Based on the elapsed time displayed on the display means, it can be determined whether re-measurement is necessary. Therefore, if the elapsed time is relatively short,
Medical judgment and treatment are immediately performed based on the blood pressure value displayed on the blood pressure value display means without re-measuring the blood pressure value, thereby eliminating unnecessary re-measurement and delay time for medical judgment and treatment. can be resolved.

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

FIG. 2 shows a display operation panel 2 used in a blood pressure monitoring device according to an embodiment of the present invention. 4 are provided respectively. The first display 3 and the second display 4 are for displaying the systolic blood pressure value and the diastolic blood pressure value, respectively. When displaying the elapsed time, the first display 3 displays "ELP" and the second display 4 displays the systolic blood pressure value and the diastolic blood pressure value. 2 display 4
displays the elapsed time. The display operation panel 2 is provided with a switching knob 6 for selecting a blood pressure measurement cycle. Depending on the selected position of the switching knob 6, the cycle of the activation signal SS output from the activation signal generation circuit 30, which will be described later, is determined. Further, the display operation panel 2 is provided with a measurement start push button switch 7 and a stop push button switch 8. The measurement start push button switch 7 is for starting continuous automatic measurement of the blood pressure monitoring device, and the stop push button switch 8 is for automatically stopping the continuous automatic measurement cycle.

A blood pressure monitoring device equipped with the display operation panel 2 configured as described above is equipped with a control circuit shown in FIG.

In FIG. 1, a pressure sensor 12, an air pump 14, and an exhaust control valve device 16 are connected via piping 18 to a bag-shaped cuff 10 to be wrapped around the upper arm of a human body. The pressure sensor 12 sends a pressure signal SP representing the pressure inside the cuff 10 to a static pressure discrimination circuit 20.
and is supplied to the pulse wave discrimination circuit 22. The static pressure discrimination circuit 20 includes a low-pass filter, and the pressure signal SP
A cuff pressure signal representative of the pressure in the cuff 10 is generated by discriminating a signal representative of a steady pressure contained in the cuff 10.
SK to I/O port 2 via A/D converter 24
For example, the pulse wave discrimination circuit 22 that supplies the
It includes a bandpass filter that passes signals having a frequency component of about 1 to 10 Hz, and by discriminating the pulse wave signal included in the pressure signal SP, the pulse wave signal representing the pulse wave is transmitted via the A/D converter 24. Supplied to I/O port 26. This pulse wave is a pressure vibration of the cuff 10 that occurs periodically with the heartbeat of the subject.

On the other hand, the control circuit is provided with a clock circuit 28 and a start signal generation circuit 30. The clock circuit 28 constantly supplies the I/O port 26 with a time signal ST representing the current time. Further, the starting signal generating circuit 30 includes the switching knob 6 and is an automatic reset timer, which outputs the starting signal SS to I/O every time the set time selected by the switching knob 6 expires.
Supplied to O port 26. Note that the start signal generation circuit 30 receives the continuous measurement signal SR from the I/O port 26.
Operates only when supplied with

The I/O port 26 is connected via the data bus line.
It is connected to the CPU 32, ROM 34, RAM 36, and display 38. This display 38 includes the first display 3 and the second display 4. The CPU 32 executes signal processing using the temporary storage function of the RAM 36 according to a program stored in the ROM 34 in advance, and controls the air pump 14 and the exhaust control valve device 16. And the CPU
32 executes a series of blood pressure measurement operations, and
The blood pressure value is determined based on the pulse wave signal SM and the cuff pressure signal SK and is displayed on the display 38. Also,
When the measurement start push button switch 7 is operated, the continuous measurement signal SR is supplied to the start signal generation circuit 30 and held until the stop push button switch 8 is operated.

Hereinafter, the operation of this embodiment will be explained according to the flowchart shown in FIG.

When the power is turned on, an initialization routine in step S1 is executed, and various timers, flags, etc. are cleared. Next, step S2
is executed and the current time represented by the time signal ST is read. Then, step S3 is executed, and it is determined whether the content of the flag F _D is "1" or not. This flag F _D indicates that the blood pressure value data to be displayed has already been stored. Normally, immediately after the start of measurement, the content of the flag F _D is "0", so steps S4 to S9 are skipped and steps S10 and subsequent steps are executed.
In step S10, it is determined whether the measurement start push button switch 7 has been operated. If the measurement start push button switch 7 has not been operated yet,
Step S11 is executed to determine whether or not the start signal SS has been supplied from the start signal generation circuit 30. In the state before the measurement start operation, the measurement start push button switch 7 is not operated, so the above steps S2, S3, S10, and S11 are repeatedly executed and a standby state is entered.

When the measurement start operation is performed, Step S
When it is determined in step 10 that the measurement start push button switch 7 has been operated, step S12 is executed to enter the pressure display mode, and the actual pressure of the cuff 10 is displayed on the first display 3. As a result, a state in which the pressure in the cuff 10 increases with the execution of the next step S13 is displayed. In the blood pressure measurement routine at step S13, first, the exhaust control valve device 16 is fully closed and at the same time the air pump 14 is activated to start increasing the pressure in the cuff 10. Next, the cuff 1 indicated by the cuff pressure signal SK
When the zero pressure reaches a predetermined target cuff pressure, the operation of the air pump 14 is stopped and, at the same time, the exhaust control valve device 16 is slightly opened, and the gradual pressure reduction of the cuff 10 is started. In the blood pressure lowering process of the cuff 10, the systolic blood pressure value and the diastolic blood pressure value are determined based on the change in the magnitude of the pulse wave represented by the pulse wave signal SM, and these are determined in the RAM 3.
6. Then, when the blood pressure value is determined, the exhaust control valve device 16 is fully opened, the compression by the cuff 10 is released, and at the same time the cuff pressure display mode is canceled. In this embodiment, step S13 corresponds to a blood pressure value determination means that repeatedly executes a pre-stored blood pressure measurement procedure at predetermined time intervals to automatically determine the blood pressure value of the living body.

When the blood pressure measurement routine is executed as described above, steps S14, S15, and S16 are executed, the 4-second timer and the 6-second timer are cleared, the blood pressure measurement time is stored in the RAM 36, and the flag is The content of F _D is set to "1". Then, the steps from step S2 onwards are executed again.

When the blood pressure measurement value is obtained by executing step S13, the content of flag F _D is set to "1", so the determination in step S3 is affirmed.
As a result, step S4 is executed following step S3 to calculate the elapsed time. This elapsed time is the difference between the measurement time stored in step S15 and the current time read in step S2. In step S5, it is determined whether the 4-second timer has expired. If not expired, that is, step S14 or step S
Before 4 seconds have passed since the timer was cleared in step S9, step S6 is executed and the first display 3
The second display 4 displays the systolic blood pressure value and diastolic blood pressure value determined in step S13. FIG. 4 shows this state.

Before the 4 second timer expires, step S above
2, S3, S4, S5, S6, S10, and S11 are repeatedly executed, but in step S5, 4
When it is determined that the seconds timer has expired, step S
7 is executed to determine whether the 6-second timer has expired. Immediately after the 4-second timer expires, the 6-second timer does not expire for the next 2 seconds, so step S8 is executed and the elapsed time is displayed. That is,
The elapsed time determined in step S4 is the second
At the same time, "ELP" representing elapse is displayed on the first display 3. FIG. 5 shows an example of such elapsed time display.

Until the 6 second timer expires, the above steps S2, S3, S4, S5, S7, S8, S10,
S11 is repeatedly executed, and when it is determined in step S7 that the 6-second timer has expired, step S9 is executed, the 4-second timer and the 6-second timer are cleared, and the blood pressure is displayed again. As a result, by repeating the above steps, the blood pressure value display and elapsed time display as described above will change to 4 seconds and 2 seconds.
Repeatedly displayed at a time rate of seconds. Therefore, in this embodiment, steps S2, S4, S15
corresponds to elapsed time measuring means, and the first display 3 and second display 4 constitute blood pressure value display means and elapsed time display means. Note that the 4 second timer and 6 second timer are software timers.

In the above display state, when the activation signal SS is supplied from the activation signal generation circuit 30 to the I/O port 26, the determination in step S11 is affirmed, and steps S12 to S16 are performed in the same manner as described above.
is executed, the blood pressure value is determined, and the time at which the blood pressure value was determined is stored. Until the next activation signal SS is supplied, steps S2 to S11 are repeatedly executed, and the blood pressure value and elapsed time are displayed alternately. That is, when the activation signal SS is supplied next and a new blood pressure value is determined in step S13, the new blood pressure value will be displayed in place of the blood pressure value that was displayed up until then.

As described above, according to this embodiment, since the blood pressure value and the elapsed time from the measurement of the blood pressure value are displayed on the display operation panel 2, the newness of the blood pressure value, that is, the time elapsed since the blood pressure value was calculated, is displayed. You can easily know the elapsed time. Therefore, the condition of the subject can be accurately determined based on the blood pressure value and the elapsed time. Therefore, if the patient's condition changes and the elapsed time displayed together with the blood pressure value is relatively short, the blood pressure value displayed on the blood pressure value display means will not be remeasured. Since medical decisions and treatments can be made immediately based on the values, unnecessary re-measurements and delays in medical decisions and treatments can be eliminated.

Although one embodiment of the present invention has been described above in detail based on the drawings, the present invention can also be applied to other aspects.

For example, in the above-described embodiment, the elapsed time is displayed in a time-division manner on the second display 4 that displays the blood pressure value, but a display that exclusively displays the elapsed time may be provided separately alongside the blood pressure value display. It is okay to do so.

Furthermore, although the above-described embodiments are configured to display the elapsed time digitally, a display device that displays the elapsed time in an analog display such as a bar graph may also be used.

Furthermore, although the blood pressure measurement routine in the above embodiment is configured to be executed while the cuff 10 is decreasing the pressure, it goes without saying that it may be configured to be executed while the cuff 10 is increasing the pressure.

The above-mentioned embodiment is merely an embodiment of the present invention, and various changes may be made to the present invention without departing from the spirit thereof.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the circuit configuration in one embodiment of the present invention. FIG. 2 is a front view showing the display operation panel of the embodiment shown in FIG. FIG. 3 is a flowchart illustrating the operation of the embodiment shown in FIG. FIGS. 4 and 5 are diagrams showing the blood pressure value display state and the elapsed time display state of the first display device and the second display device in FIG. 2, respectively. {3...first display, 4...second display} (blood pressure value display means/elapsed time display means), step S
2, S4, S15...Elapsed time measuring means.

Claims (1)

[Scope of Claim for Utility Model Registration] Blood pressure value determination means that automatically determines the blood pressure value of a living body by repeatedly executing pre-stored blood pressure measurement procedures at predetermined time intervals; Blood pressure value display means for displaying the determined blood pressure value in place of the previously displayed blood pressure value; and an elapsed time for automatically measuring the elapsed time since the blood pressure value was determined by the blood pressure value determination means. a measuring means; and an elapsed time display means for displaying the elapsed time determined by the elapsed time measuring means on the same display panel surface as the blood pressure value displayed by the blood pressure value display means. Characteristic blood pressure monitoring device.