JPH05317269A - Living-body information value variation direction informing device - Google Patents

Abstract

PURPOSE:To provide the living-body information value variation direction informing device which can recognize easily and surely the variation direction of a living body information value by the auditory sense without looking at one by one the living body information value measured and displayed successively. CONSTITUTION:Whenever a blood pressure value is measured, in the case a blood pressure value difference DELTASYS obtained by subtracting the previous highest blood pressure value SYS-1 from the present highest blood pressure value SYS0 exceeds the positive upper limit value within a range determined in advance, a first sound and a second sound being higher than it are outputted successively from a chime 44, and in the case the blood pressure value difference DELTASYS exceeds the negative lower limit value within the range, a first sound and a second sound being lower than it are outputted successively from a chime 46, and in the case the blood pressure value difference DELTASYS is within the range, a first sound and a second sound of the same pitch are outputted successively from a chime 42.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biometric information value change direction informing device for informing a change direction of a value of biometric information each time a value representing the biometric information is sequentially measured.

[0002]

2. Description of the Related Art In order to monitor the condition of a patient during or after surgery, a value (for example, blood pressure value) representing the biological information of the patient is successively measured and displayed at predetermined measurement intervals. ing. In this case, when the measured value of the biometric information is abnormal, a predetermined alarm is usually issued.

[0003]

However, if a doctor, a nurse, or the like does not frequently see the biological information values that are successively displayed, there are cases in which the change in the patient's condition is not noticed until the above-mentioned alarm is issued. However, there is a problem that it is difficult to concentrate on work such as surgery or treatment when the display of the biometric information value is frequently viewed in order to grasp the change in the condition of the patient at an early stage.

On the other hand, for example, as described in Japanese Utility Model Application Laid-Open No. 64-43907, which was filed and filed by the applicant of the present invention, a voice having a pitch corresponding to the measured biological information value is output. For example, if the output is intermittently synchronized with the heartbeat, the direction of change of the biometric information value can be audibly recognized based on the change of the pitch of the voice, so that the above problem is preferably solved. It is considered possible.

However, even in this case, there is still a problem to be solved. In other words, doctors and nurses need to continue to listen carefully to the change in the pitch of the sound output intermittently as described above, so it is necessary to continue listening to the sound. It is hard to say that you can concentrate on such tasks.

The present invention has been made in view of the above circumstances. An object of the present invention is to change the direction of a biometric information value without having to look at the biometric information values successively measured and displayed one by one. It is an object of the present invention to provide a biometric information value change direction notification device capable of audibly and easily recognizing.

[0007]

The present invention has been made in view of the above circumstances, and its gist is to provide a sound output device for outputting a first sound and a second sound following it. A biometric information value changing direction notifying device which is provided with and which notifies the changing direction of the value of the biometric information by the first sound and the second sound each time the value representing the biometric information is sequentially measured at a predetermined measurement interval. , (A) biometric information value difference calculating means for calculating the biometric information value difference between the value of the previous biometric information and the value of this biometric information, and (b) the predetermined range of the biometric information value difference. Biometric value difference determination means for determining whether or not, (c) change direction determination means for determining the direction of change of the current biometric value with respect to the previous biometric value, (d) the biometric information If the value difference is out of the predetermined range, the change direction determining And a sound changing unit that changes the second sound with respect to the first sound according to the changing direction of the value of the biological information determined by the step.

[0008]

In the biometric information value change direction notification device having such a configuration, the biometric information value difference between the previous biometric information value and the current biometric information value is calculated by the biometric information value difference calculating means and Whether or not the information value difference is outside the predetermined range is determined by the biometric information value difference determination means, and the change direction of the current biometric information value with respect to the previous biometric information value is determined by the change direction determination means. To be done. When the difference between the biometric information values is out of the predetermined range, the sound changing unit outputs the second sound output from the sound output device in accordance with the determined direction of change in the value of the biometric information. By changing the first sound, the changing direction of the value of the biometric information is notified based on the change of the second sound with respect to the first sound.

[0009]

Therefore, the change of the second sound can be easily and surely heard based on the first sound and the second sound following the first sound which is output each time the biological information value is measured. In order to obtain the information, the doctor, the nurse, etc. can easily and surely recognize the direction of change of the biometric information value by hearing without looking at the biometric information value displayed one by one, and change the patient's condition early. While being able to grasp the information, it is possible to concentrate more on the operation such as surgery and treatment for the patient.

An example of the value representing the biometric information is a blood pressure value measured using a cuff that presses the living body.

The sound changing means is preferably configured to change the pitch of the second sound with respect to the first sound.

Further, the sound changing means is preferably configured to change the strength of the second sound with respect to the first sound.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing an example of the configuration of a blood pressure monitoring device equipped with the biological information value change direction notification device of the present invention. This blood pressure monitor is used, for example, to monitor the condition of a patient during or after surgery.
In FIG. 1, reference numeral 10 denotes a rubber and bag-shaped cuff that is mounted in a wound state on the upper arm of the patient. The cuff 10 includes a pressure sensor 12, a switching valve 14, and an air pump 1.
6 are connected to each other via a pipe 18. The switching valve 14 has a pressure supply state that allows the pressure to be supplied into the cuff 10, and a slow discharge pressure state that gradually discharges the pressure in the cuff 10.
The cuff 10 can be switched to a rapid exhaust pressure state in which the pressure is rapidly exhausted. The pressure sensor 12 is the cuff 10.
The internal pressure is detected and the pressure signal SP representing the pressure is supplied to the static pressure discrimination circuit 20 and the pulse wave discrimination circuit 22, respectively. The static pressure discrimination circuit 20 includes a low-pass filter, discriminates the static pressure component contained in the pressure signal SP, and represents the static pressure component (hereinafter referred to as the cuff pressure P).
Is supplied to the CPU 26 via the A / D converter 24. The pulse wave discrimination circuit 22 includes a bandpass filter,
The pulse wave component included in the pressure signal SP is discriminated and the pulse wave signal SM representing the pulse wave is supplied to the CPU 26 via the A / D converter 28.

The CPU 26 is connected to the ROM 30, the RAM 32, the display 34, and the output interface 36 via a data bus line, and performs signal processing while utilizing the storage function of the RAM 32 according to a program stored in the ROM 30 in advance. Run and output interface 3
6 outputs drive signals SD ₁ and SD ₂ to a drive circuit (not shown) to control the switching valve 14 and the air pump 16 to adjust the cuff pressure P, and obtain the cuff pressure P successively in, for example, a gradual step-down process. The blood pressure value such as the systolic blood pressure value SYS and the diastolic blood pressure value DIA is determined based on the pulse wave represented by the pulse wave signal SM to be displayed, and the determined blood pressure value is displayed on the display 34, and the blood pressure measurement is predetermined. Repeat at regular intervals.

Further, the CPU 26 sequentially calculates, for example, a blood pressure value difference ΔSYS between the previously measured systolic blood pressure value SYS _-1 and the presently measured systolic blood pressure value SYS ₀ according to a program previously stored in the ROM 30. It is determined whether or not the calculated blood pressure difference ΔSYS is out of a predetermined range, and the direction of change of the current maximum blood pressure value SYS ₀ with respect to the previous maximum blood pressure value SYS ₋₁ is determined.

A changeover switch 40 is connected to the output interface 36 via a drive circuit 38. The changeover switch 40 has a first chime 42, a second chime 44, a third chime 46, and an alarm buzzer. 48 are connected in parallel. The changeover switch 40 switches the drive circuit 38 to a first chime 42, a second chime 44, and a third chime by being switched according to a changeover signal SC described later.
It is connected to either the chime 46 or the alarm buzzer 48.

Here, for example, as shown in FIG. 2, the first chime 42 outputs a relatively short first tone having substantially the same height, that is, a frequency, and a relatively long second tone that follows. Is. The second chime 44 outputs a relatively short first sound and a second sound that is relatively long and is higher than the first sound.
Further, the third chime 46 outputs a relatively short first sound and a second sound which is subsequent thereto and is relatively long and lower than the first sound.

The CPU 26 outputs a predetermined changeover signal SC from the output interface 36 to the changeover switch 40 each time the blood pressure measurement is completed in accordance with a program stored in advance in the ROM 30, so that the blood pressure value difference ΔSYS is predetermined. When it is not outside the range, the changeover switch 40 is located at the position where the drive circuit 38 and the first chime 42 are connected, and when it is outside the range, the change direction of the systolic blood pressure value SYS is in the increasing direction. In the case where the changeover switch 40 is outside the above range and the change direction of the systolic blood pressure value SYS is in the decreasing direction, the changeover switch 40 is located at the position where the drive circuit 38 and the second chime 44 are connected. After changing the changeover switch 40 to the position where the drive circuit 38 and the third chime 46 are connected, the drive signal is output from the output interface 36. They chime and outputs the SD ₃ 4
2, 44 and 46 are driven alternatively. In addition, the CPU 26
According to a program stored in advance in the ROM 30,
It is determined whether or not the systolic blood pressure value SYS has reached a predetermined alarm output determination value. If it has, the predetermined switch signal SC is output to the switch 40 and the switch 4 is selected.
By switching 0 to a position where the drive circuit 38 and the alarm buzzer 48 are connected to each other, the drive signal SD ₃ is output,
The alarm buzzer 48 is driven. In the present embodiment, the chimes 42, 44, 46 constitute a sound output device.

Next, the operation of the blood pressure monitoring device constructed as described above will be described with reference to the flowchart of FIG.

When the power is turned on, an initial process (not shown) is executed, and a start push button switch (not shown) is turned on, step S1 is executed, the switching valve 14 is switched to the pressure supply state, and the air pump 16 is turned on. When activated, the cuff pressure P is increased to a predetermined target cuff pressure P _m (for example, a pressure of about 180 mmHg) so that the cuff pressure P is higher than the expected maximum blood pressure value of the patient by a predetermined pressure. Next, in step S2, the operation of the air pump 16 is stopped and the switching valve 14 is switched to the gradual discharge pressure state, whereby the gradual pressure reduction of the cuff pressure P is started.

In the blood pressure measurement routine of the subsequent step S3, it is determined whether the pulse wave signal SM is read and one pulse wave is detected. If one pulse wave is detected, it is well known. By executing the oscillometric blood pressure value determination algorithm, the blood pressures such as the systolic blood pressure value SYS and the diastolic blood pressure value DIA are calculated based on the change in the amplitude of the pulse wave sequentially detected in the process of gradually decreasing the cuff pressure P. The value is determined.

In the next step S4, it is judged whether or not the blood pressure measurement is completed. When this determination is negative, steps S3 and S4 are repeatedly executed, but when the blood pressure measurement is completed and the determination of step S4 is affirmative, step S5 is executed and the blood pressure measurement value is displayed. The pressure is displayed on the container 34, and step S6 is executed to switch the switching valve 14 to the rapid exhaust pressure state, so that the pressure inside the cuff 10 is rapidly exhausted.

Next, in step S7, it is determined whether or not the current blood pressure measurement is the first measurement. When this determination is affirmed, steps S8 to S1 described later are performed.
5 is skipped and step S16 is executed, so that a predetermined fixed time (for example, 2 minutes to 5).
It is determined whether or not (a time of about a minute) has elapsed. When the determination in step S16 is negative, the standby state is set, but when the determination is positive, the process returns to step S1 and the blood pressure measurement is performed again as described above.

On the other hand, when the blood pressure measurement this time is not the first time and the determination in step S7 is negative, step S8 is performed.
Is executed and the previous systolic blood pressure value SYS _-1 is subtracted from the systolic blood pressure value SYS _{0 of} this time to obtain a blood pressure difference ΔSY.
S is calculated. In this embodiment, the systolic blood pressure value SY
S corresponds to a value representing biometric information, and more precisely, the portion used for executing step S8, more accurately, step S8 of the CPU 26, the ROM 30, and the RAM 32 corresponds to the biometric information value difference calculating means. ..

In the next step S9, the blood pressure value difference ΔS
It is determined whether YS is less than or equal to a predetermined positive upper limit value α. This upper limit value α is the maximum blood pressure value SYS of this time.
₀ is a reference value for determining whether or not the previous systolic blood pressure value SYS ₋₁ has changed relatively greatly in the increasing direction, and for example, the current systolic blood pressure value SYS ₀ is 10
When it is 1 mmHg or more, it is set to 15 mmHg, and when the current systolic blood pressure value SYS ₀ is 100 mmHg or less, it is set to 10 mmHg. If the determination in step S9 is negative, the current systolic blood pressure value SYS ₀ is the previous systolic blood pressure value SY.
Since the change is relatively large with respect to S ₋₁ in the increasing direction, step S10 is executed to change the drive signal after the changeover switch 40 is changed to the changeover position for connecting the drive circuit 38 and the second chime 44. When SD ₃ is output, the second chime 44 is driven, the blood pressure measurement is completed, and the chime sound (first sound) indicating that the blood pressure value such as the systolic blood pressure value SYS changes relatively greatly in the increasing direction (first sound And a higher chime sound) is output,
Then, step S16 is executed.

If the determination in step S9 is affirmative, step S11 is executed to change the blood pressure value difference ΔSYS.
Is determined to be equal to or greater than a predetermined negative lower limit value -β. This lower limit value-β is the maximum blood pressure value SYS of this time.
₀ is a reference value for determining whether or not the previous systolic blood pressure value SYS ₋₁ has changed relatively greatly in the decreasing direction, and for example, the present systolic blood pressure value SYS ₀ is 10
When it is 1 mmHg or more, it is set to -15 mmHg, and when the current systolic blood pressure value SYS ₀ is 100 mmHg or less, it is -10 mmHg.
Set to Hg. If the determination in step S11 is affirmative, that is, if the blood pressure value difference ΔSYS is greater than or equal to the lower limit value −β and less than or equal to the upper limit value α, the current systolic blood pressure value SYS ₀ is the previous systolic blood pressure value SYS. Since it has not changed so much with respect to _-1 , step S12 is executed, and after the changeover switch 40 is changed over to the changeover position for connecting the drive circuit 38 and the first chime 42, the drive signal SD ₃
Is output, the first chime 42 is driven, the blood pressure measurement is completed, and the chime sound indicating that the blood pressure value such as the systolic blood pressure value SYS has not changed so much (the first chime having substantially the same height) is output. Sound and a second sound) are output, and then step S16 is executed. In the present embodiment, the steps S9 and S11 are, more accurately, the CPU 26, the ROM 30, and the R.
The portion of AM32 used for executing step S9 and step S11 corresponds to the biometric information value difference determination means and the change direction determination means.

If the determination in step S11 is negative, the current systolic blood pressure value SYS ₀ has changed relatively greatly in the decreasing direction with respect to the previous systolic blood pressure value SYS _-1 , so step S13 is executed. It is executed to determine whether or not the current systolic blood pressure value SYS ₀ is less than or equal to a predetermined alarm output determination value γ. This alarm output determination value γ is a reference value for determining whether or not the systolic blood pressure value SYS ₀ has dropped to a level at which an alarm is issued. Alternatively, it may be uniformly set to a value of, for example, about 80 mmHg for men and about 70 mmHg for women. If the determination in step S13 is negative, step S14
Is executed, the changeover switch 40 causes the drive circuit 38 and the third switch
The drive signal SD ₃ is output after being switched to the switching position where the chime 46 is connected, the third chime 46 is driven, the blood pressure measurement is completed, and the blood pressure value such as the systolic blood pressure value SYS decreases. A chime sound (a chime sound composed of a first sound and a lower second sound) indicating a relatively large change to is output, and then step S
16 is executed. In the present embodiment, the steps S10, S12, and S14 described above, more accurately, the steps S10 and S of the CPU 26, the ROM 30, the RAM 32, and the output interface 36 are performed.
The part used for executing steps S12 and S14 and the changeover switch 40 correspond to the sound changing means. Further, in the present embodiment, the steps S8 to S14, more accurately, the CPU 26, the ROM 30, the RAM 32, and the portion of the output interface 36 used to execute steps S8 to S14, the drive circuit 38. , Changeover switch 40, and chimes 42, 4
Reference numerals 4 and 46 constitute a biometric information value change direction notification device.

On the other hand, if the determination in step S13 is affirmative, step S15 is executed and the changeover switch 40 is changed over to the position for connecting the drive circuit 38 and the alarm buzzer 48, and then the drive signal SD ₃ Is output, the alarm buzzer 48 is driven, and an alarm sound indicating that the current minimum blood pressure value DIA ₀ has reached the value γ is output, and then step S16 is executed.

If it is determined in step S16 that the predetermined time has elapsed, the process returns to step S1 so that the chime 42, and the chime 42, are similarly measured each time blood pressure is measured until the start push button switch is turned off. Four
Either of 4, 46 or the alarm buzzer 48 is driven, and a predetermined chime sound or alarm sound indicating the blood pressure change direction (including the case where it does not change) is output.

As described above, according to this embodiment, the blood pressure value difference ΔSYS obtained by subtracting the previous systolic blood pressure value SYS ₋₁ from the present systolic blood pressure value SYS ₀ is −β ≦ ΔSYS ≦ α.
If it is within the range, it is notified that the blood pressure value has not changed so much by the chime sound from the first chime 42, which is composed of the first sound and the second sound having substantially the same pitch,
When the blood pressure value difference ΔSYS is larger than the upper limit value α of the above range, the chime sound composed of the first sound from the second chime 44 and the second sound higher than the second sound changes the blood pressure relatively greatly in the increasing direction. While being notified, the blood pressure difference Δ
When SYS is smaller than the lower limit value -β of the above range and the systolic blood pressure value SYS has not reached the alarm output determination value γ, a chime composed of the first sound from the third chime 46 and the second sound lower than the first sound. The sound informs that the blood pressure has changed relatively greatly in the decreasing direction. Therefore, a change in the second sound can be easily and reliably heard based on the first sound and the second sound that follows each time the blood pressure measurement is completed, with the first sound as a reference. A nurse or the like can easily and surely audibly recognize whether or not the blood pressure value has changed and the direction of the change, without having to look at the blood pressure measurement values successively displayed on the display 34. While it is possible to grasp the change in the condition of the patient at an early stage, it is possible to concentrate more on the operation such as surgery and treatment for the patient.

Further, according to this embodiment, the chime 42,
44 and 46 output relatively short first and second sounds
Since the blood pressure change direction is notified only by the sound, there is an advantage that the blood pressure change direction can be notified more quickly than in the case where the blood pressure change direction is notified by language.

Although one embodiment of the present invention has been described above with reference to the drawings, the present invention can be applied to other modes.

For example, in the above-described embodiment, the chimes 42, 44, 46 as the sound output device are configured to be driven alternatively, but this is not always necessary, and for example, a relatively high sound can be produced. Using a buzzer or bell for high tones that outputs, a buzzer or bell for low tones that outputs a relatively low tone, and a buzzer or bell for middle tones that outputs a tone at an intermediate pitch, as a sound output device, The first sound may be output by the middle-tone buzzer or the like, and the second sound may be output by any of the middle-tone, treble, or low-tone buzzer.

In the above embodiment, the chimes 42, 4
Reference numerals 4 and 46 are configured to notify the blood pressure change direction by changing the pitch of the second sound with respect to the first sound, but this is not always necessary. For example, the strength of the second sound with respect to the first sound may be changed. It is also possible to notify the blood pressure change direction by changing the size (size).

In the above embodiment, the sound output device is composed of the chimes 42, 44 and 46 for outputting only the first sound for indicating the blood pressure change direction and the second sound following it. A predetermined sound or voice may be output at least one of before one sound and after the second sound.

In the above embodiment, the chimes 42, 4
Although it has been described that the first sounds having the same pitch are output from the speakers 4 and 46, the first sounds having different pitches may be output.

In the above embodiment, the chime sound including the first sound and the second sound may be output only once, or may be repeatedly output a predetermined number of times.

Further, in the above embodiment, both the biometric information value difference determining means and the change direction determining means are configured in step S9 and step S11, but they are not always necessary. For example, the blood pressure value difference ΔSYS can be calculated. If the absolute value is used, both means will be configured separately.

In the above embodiment, the first sound and the second sound
Although only the blood pressure change direction is notified by the sound, for example, when the blood pressure increases and decreases, a plurality of types of second sounds having different pitches according to the magnitude of the blood pressure value difference ΔSYS are generated. It is also possible to output each of the notification sounds that the user has so as to notify not only the direction of blood pressure change but also the degree of blood pressure change.

Further, in the above embodiment, the systolic blood pressure value measured using the cuff 10 is adopted as the value representing the biological information, but in addition to or instead of this, the diastolic blood pressure value or the mean blood pressure value, Furthermore, the oxygen saturation in blood or the like may be adopted.

In the above embodiment, the alarm is issued only when the current systolic blood pressure value SYS ₀ becomes equal to or less than the alarm output determination value γ, but this is not always necessary. When the current minimum blood pressure value DIA ₀ becomes equal to or lower than a predetermined alarm output determination value, or the current maximum blood pressure value SYS ₀ or minimum blood pressure value DIA ₀ exceeds a range having predetermined upper and lower limit values. It can be configured to give an alarm when a user hits.

In the above embodiment, the alarm buzzer 48 is not always necessary and may be removed.
In this case, the first for notifying the blood pressure change direction
By configuring at least one of the sound and the second sound as a continuous sound of a short sound such as beeping, it is possible to give an alarm together with the notification of the blood pressure change direction.

The above is merely an embodiment of the present invention, and the present invention can be modified in various ways without departing from the spirit thereof.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of the configuration of a blood pressure monitoring device including a biological information value change direction notification device of the present invention.

FIG. 2 is a diagram showing an example of a chime sound composed of a first sound and a second sound output from each of the chimes shown in FIG.

FIG. 3 is a flowchart for explaining the operation of the blood pressure monitoring device of FIG.

[Explanation of symbols]

{40 switch, steps S10, S12, S1
4} Sound changing means {42 1st chime, 44 2nd chime, 46 3rd chime} Sound output device Step S8 Biometric information value difference calculating means {Step S9, S11} Biometric information value difference determining means, change direction determining means

Claims (4)

[Claims] 1. A sound output device for outputting a first sound and a second sound following the first sound, the first sound and the second sound each time a value representing biological information is sequentially measured at a predetermined measurement interval. A biometric information value change direction notifying device for notifying the change direction of the value of the biometric information by the biometric information value calculating a biometric information value difference between the previous biometric information value and the current biometric information value. Difference calculation means, biometric information value difference determination means for determining whether or not the biometric information value difference is outside a predetermined range, and a change direction of the value of the biometric information of this time with respect to the value of the previous biometric information is determined. Change direction determining means, and when the biological information value difference is out of the predetermined range, the second sound is generated according to the changing direction of the value of the biological information determined by the changing direction determining means. Sound changing means for changing the first sound. Biological information value change direction informing apparatus characterized by. 2. The bio-information value changing direction notification device according to claim 1, wherein the value representing the bio-information is a blood pressure value measured using a cuff that presses the living body. 3. The biological information value changing direction notification device according to claim 1, wherein the sound changing unit changes the pitch of the second sound with respect to the first sound. 4. The biological information value changing direction notification device according to claim 1, wherein the sound changing unit changes the strength of the second sound with respect to the first sound.