JPH02297335A - Electronic hemodynamometer for finger - Google Patents

Abstract

PURPOSE:To facilitate the proper mounting of a cuff and improve measurement precision and prevent congestion by detecting the proper mounting of the cuff from the air pressure detected by a pressure detecting means and informing of the proper mounting when the proper mounting is detected. CONSTITUTION:The proper mounting of a cuff 13 is detected from the air pressure detected by an air pressure detecting means, and when the proper mounting is detected, the proper mounting is informed by a proper mounting detecting means. As the cuff 13 is wound onto a finger F successively, the cuff 13 contacts the finger F, and closely attached onto the finer gradually stronger. Since the cuff pressure varies according to the winding of the cuff 13, it can be judged if the cuff 13 is properly mounted onto the finger F when the cuff pressure becomes a prescribed value. Therefore, the cuff 13 can be easily mounted on a patient to be examined by informing the proper mounting to the patient. Further, the measurement precision can be improved, and blood congestion can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an electronic finger blood pressure monitor equipped with a cuff winding mechanism.

(b) Conventional technology Conventionally, digital blood pressure monitors for fingers have been equipped with a cuff attached to the finger.
The air pressure inside the cuff is increased using a pressurizing pump (hereinafter simply referred to as "pressurizing the cuff"), and after once the artery in the finger is blood-stabilized, the air inside the cuff is evacuated at a constant slow speed. It is known that the systolic blood pressure value and the diastolic blood pressure value are determined based on the air pressure within the cuff (hereinafter simply referred to as cuff pressure) and a pulse wave signal.

Some of these conventional finger electronic blood pressure monitors are equipped with a mechanism for wrapping a band-shaped cuff around a subject's finger, and FIG. 4 shows an example of such a mechanism.

In FIG. 4, reference numeral 11 indicates a case of the digital finger blood pressure monitor, and a band member 12 to which a cuff 13 is attached is housed within this case. The band body 12 has one end 12a attached with the cuff 13 fixed to the case 11, and the other end 12a attached to the cuff 13.
b is attached to the engaging claw 14.

Reference numeral 15 denotes a knob that is slidably attached to the case 11, and the engagement claw 14 and button 16 are attached to this knob 15. The button 16 and the engaging pawl 14 can move together in the left-right direction in FIG. 4(a), and are biased by the spring 17 in the rightward direction in FIG. 4(a). The knob 15 is fixed to the case 11 by the engagement claw 14 engaging the engagement recess 11a of the case 11.

To attach the cuff 13, insert your finger into the case 11, press down on the knob 15 downward in FIG. 4(b) while pressing the button 16, wrap the band 12 around your finger
3 on finger F. When it is determined that the wrapping is completed, the button 16 is released, the knob 15 is fixed to the case 11, and the blood pressure is measured.

(c) Problems to be solved by the invention In the digital finger blood pressure monitor mentioned above, the subject manually wraps the cuff by operating the wrapping mechanism, making it difficult to determine the strength with which the cuff should be wrapped, making it difficult to properly attach the cuff. It is difficult to If the cuff is not properly attached, there is a risk that measurement errors may occur, or the measurement time may become longer, leading to blood congestion.

The present invention has been made in view of the above, and an object of the present invention is to provide an electronic finger blood pressure monitor that allows the cuff to be appropriately attached.

(d) Means for Solving the Problems In order to solve the above problems, the electronic finger blood pressure monitor of the present invention includes a wrapping mechanism that wraps and attaches the cuff around the finger of a subject, and a winding mechanism that allows the cuff to be wrapped around the finger of the subject. a pressurizing means for pressurizing, an evacuation means for evacuation of the air in the cuff at a slow or rapid rate, a pressure detection means for detecting the air pressure in the cuff, and a pulse wave signal for detecting a pulse wave signal from the finger of the subject. A blood pressure value determining means for determining a blood pressure value based on the air pressure detected by the pressure detecting means and the pulse wave signal detected by the pulse wave signal detecting means,
Appropriate attachment detection means for detecting proper attachment of the cuff based on the air pressure detected by the pressure detection means; Appropriate attachment notification means for notifying when proper attachment is detected by the appropriate attachment detection means. It is characterized by being prepared.

(E) Function The function of this invention will be explained using Fig. 4.
3t - As the cuff 13 is wrapped around finger F,
, and gradually become more closely attached.

At this time, the cuff pressure changes as the cuff 13 is wrapped, so when the cuff pressure reaches a predetermined value, the cuff 13
It can be determined that the finger F is properly attached to the finger F. Then, by notifying the subject of this proper wearing, the subject can easily wear the cuff 13 appropriately.

(f) Example An embodiment of the present invention will be described below based on the drawings.

FIG. 2 is a block diagram illustrating the configuration of the digital finger blood pressure monitor according to the embodiment. 13 is a cuff for a finger, for example, the fourth cuff.
It has a winding mechanism shown in the figure. Note that the cuff wrapping mechanism is not limited to that shown in FIG. 4, and the design can be changed as appropriate.

The cuff 13 is connected to a slow exhaust valve 2, a rapid exhaust valve 3, a pressure pump 4, and a pressure sensor 5.

The opening/closing of the quick exhaust valve 3 and the on/off of the pressurizing pump 4 are controlled by the MPU 7. The pressure sensor 5 detects cuff pressure, and its output signal is converted into a digital signal by an analog/digital (A/D) converter 6 and sent to the MPU.
Incorporated into 7.

The MPU 7 has a function of controlling the quick exhaust valve 3 and the pressurizing pump 4, a function of calculating the cuff pressure from the captured cuff pressure signal, a function of performing digital filtering on the cuff pressure signal and detecting a pulse wave, a function of controlling the cuff pressure and It has a function of determining a blood pressure value (systolic blood pressure value, diastolic blood pressure value) based on a pulse wave, a function of detecting insertion of a finger into the cuff 13, and a function of detecting proper attachment of the cuff 13.

A liquid crystal display (LCD) 8 is connected to the MPU 7, and the LCD 8 displays the blood pressure value and the fact that the cuff 13 is properly attached. Reference numeral 9 denotes a power supply circuit, which is turned on/off by a power switch 10.

Next, the operation of the sphygmomanometer according to the embodiment will be explained with reference to FIGS. 1 and 3.

First, as shown in FIG. 4(a), raise the knob 15 to the highest position to completely loosen the cuff 13, and press the power switch 10 to turn on the power.

When the power is turned on, the quick exhaust valve 3 closes according to a command from the MPU 7 [step (hereinafter referred to as ST) 1, a in Fig. 3].
], the pressurizing pump 4 starts operating (Sr1, b in FIG. 3). The MPU 7 takes in the cuff pressure signal from the A/D converter 6 (Sr1), and determines whether the cuff pressure P has reached lmmHg (Sr1). If the determination of Sr1 is NO, the process branches to Sr1, and if the determination is YES, the process branches to Sr1.

That is, until the cuff pressure P reaches lmmHg, Sr
1, the processing of Sr1 will be repeated.

In Sr1, the MPU stops the pressure pump 4 (the third
c) in the figure. Furthermore, MPU7, like Sr1, controls cuff pressure P3.
5T6), and it is determined whether this cuff pressure P8 is 20 mmHg or more (Sr1).

Sr1 and Sr1 are repeated until this determination becomes YES.

During this time, wearing of the cuff 13 begins. In this installation, as shown in FIG. 4(b), the finger F is inserted into the cuff 13, and the knob 15 is pushed down while pressing the button 1b. As the knob 15 is pushed down, the cuff 13 comes into close contact with the finger F, and the cuff 13 is compressed, causing the cuff pressure P to become too high.

When this cuff pressure P8 exceeds 20 mm11g, Sr1
The determination becomes YES, and the MPU 7 can detect that the finger F is inserted into the cuff 13 (d in Fig. 3).
).

If the determination of Sr1 is YES, proceed to the processing of Sr1,
The MPU 7 is unable to open the quick exhaust valve 3 (d) in Figure 3 and detects the cuff pressure P3 (5T9), and this cuff pressure P3 is 1 mm.
Determine whether it has become 11g or less (STIO), 5
If the TIO (7) judgment is YES, branch to 5T11,
In the case of No, the process branches to Sr9. That is, 5TIO
The process of Sr9.5TIO is repeated until the determination becomes YES.

By opening the rapid exhaust valve 3 at Sr1, the cuff pressure P decreases, and the cuff 13 can be completely attached by the finger F. If the 5TIO decision is YES, cuff 13
The cuff has been properly attached to the finger F, and the MPU 7 closes the rapid exhaust valve 3 (STII, e in FIG. 3) and displays on the LCD 8 that the cuff has been attached (ST12). At this time,
The user releases the button 16, engages the engagement claw 14 with the engagement recess 11a, and fixes the knob 15 to the case 11. With this, the proper state of attachment of the cuff 13 to the finger F is maintained.

At continuation<5T13, the MPU 7 opens the rapid exhaust valve 3 again (f in FIG. 3). Then, cuff pressure P8 is detected (
ST14), it is determined whether this has become OmmHg (ST'15). If the determination of 5T15 is NO,
Branches to 5T14, and if YES, branches to 5T16.

At 5T16, the MPU 7 closes the quick exhaust valve 3, and blood pressure measurement processing is performed as in the past (STI7). This 5
At T17, the cuff 13 is pressurized to a target value greater than or equal to the optimal blood pressure value, and then a slow exhaust is performed using the slow exhaust valve 2. During this time, the cuff pressure P is subjected to digital filtering processing to extract a pulse wave and determine the blood pressure value. It is something to do. Note that this invention does not involve blood pressure measurement processing as a main part;
Detailed explanation will be omitted.

When the blood pressure measurement process (ST17) is completed, the MPU 7 displays the blood pressure value on the LCD g (ST18), opens the rapid exhaust valve 3, releases the finger from pressure, and ends the measurement (ST19). . Furthermore, the 5T20 determines whether the power is off, and if this determination is NO, the S
Return to TI and perform measurement again, and if YES, end measurement.

If you wrap the cuff without inserting your finger,
Even if the knob 15 is pushed down again as shown in FIG. 4(C), the cuff pressure Pa will not exceed 20 mm11 g.

In the above embodiment, the pulse wave is extracted from the cuff pressure signal, but a photoelectric sensor may be provided on the cuff to extract the pulse wave, and the membrane 81 can be changed as appropriate.

Furthermore, the notification that the cuff has been properly attached may be provided not only by display but also by audio, and the design can be changed as appropriate.

(G) As described in detail of the invention, the finger electronic blood pressure monitor of the present invention includes: proper wearing detection means for detecting proper wearing of the cuff based on the air pressure detected by the pressure detecting means; Since the cuff is equipped with a proper attachment notification means that notifies when proper attachment is detected by the attachment detection means, it is easy to attach the cuff appropriately, improving measurement accuracy and reducing congestion. It has the advantage of preventing

[Brief explanation of the drawing]

FIG. 1 is a flow diagram illustrating the operation of an electronic finger sphygmomanometer according to an embodiment of the present invention, FIG. 2 is a block diagram illustrating the configuration of an electronic finger sphygmomanometer, and FIG. Diagrams illustrating changes in cuff pressure of electronic blood pressure monitors, Figure 4 (a), Figure 4
4(b) and 4(C) are diagrams showing an example of a cuff wrapping mechanism of an electronic finger blood pressure monitor. 2: Slow exhaust valve, 3: Rapid exhaust valve, 4: Pressure pump, 5: Pressure sensor, 7: MPU,
8: LCD. 13: Cuff. Patent Applicant Tateishi Electric Co., Ltd. Agent Patent Attorney Shinji Naka Toshige Figure 4 (a) Figure 4 (b) Figure 4 (C)

Claims (1)

[Claims] (1) a cuff, a wrapping mechanism for wrapping and wearing the cuff around a subject's finger, a pressurizing means for pressurizing the air within the cuff, an exhaust means for slowly or rapidly exhausting the air within the cuff; a pressure detection means for detecting air pressure within the cuff; a pulse wave signal detection means for detecting a pulse wave signal from the finger of the subject; and a pressure detection means for detecting a pulse wave signal from the finger of the subject; A finger electronic sphygmomanometer comprising a blood pressure value determining means for determining a blood pressure value based on a pulse wave signal, the proper wearing method detecting whether or not the cuff is properly worn based on the air pressure detected by the pressure detecting means. 1. An electronic finger blood pressure monitor comprising: a detection means; and an appropriate attachment notification means for notifying when proper attachment is detected by the appropriate attachment detection means.