JPH0436804Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a blood pressure monitor that detects the pressure at which Korotkoff sounds occur and disappear during the pressure reduction process by leaking air sealed in a cuff.

<Prior art> Blood pressure monitors emit a constant amount of air during the depressurization process, but the volume of air enclosed in the cuff varies depending on the way the cuff is wrapped, the thickness of the arm of the person taking the measurement, etc. Therefore, there will be a difference in the amount of pressure reduction per unit time, that is, the speed of pressure reduction.

Therefore, accurate blood pressure measurement cannot be performed.

<Purpose of the invention> In view of the above-mentioned circumstances, the purpose of the present invention is to provide a blood pressure monitor that has a decompression rate adjustment function that allows the decompression rate to be set in stages and the decompression rate to be switched to an appropriate value. do.

<Example> The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a blood pressure monitor according to an embodiment of the present invention, in which a cuff 1 is connected to a rubber bulb (air balloon) 3 through an inlet tube 2, and a vacuum is connected through an exhaust tube 4. A valve (exhaust valve) 5 is connected.

In the figure, 6 is a device for adjusting the pressure reducing valve 5, which will be described later.

Further, 7 is a pressure-to-electricity converter, which outputs a voltage proportional to the pressure inside the cuff 1. The output of this converter 7 is applied to an A/D (analog-digital) converter 8, and the converted digital signal is stored in memories 9 and 1.
0 and its output signal is displayed on the displays 11 and 12.

Furthermore, a microphone 13 for detecting Korotkoff sounds (vascular sounds) is inserted between the cuff 1 and the arm, and the output of this microphone 13 is transmitted to a Korotkoff sound generation detector 14 for detecting systolic blood pressure and In addition to the Korotkoff sound extinction detector 15 for detecting diastolic blood pressure, these detection signals are used as write command signals for the memories 9 and 10.

When measuring blood pressure, air is sealed into the arm cuff 1 from the rubber bulb 2 through the introduction tube 2, and after the cuff pressure reaches a predetermined pressure, the air enclosed in the arm cuff 1 is then evacuated. It is leaked to the outside through pipe 4, and the pressure is reduced.

The function of the adjustment device 6 will be explained using FIG. 2.

In the figure, 4 is the exhaust pipe, from which air leaks in the direction indicated by the arrow.

A pressure reducing valve 5 is inserted in the middle of the exhaust pipe 4 to reduce the cross-sectional area of the flow path of the exhaust pipe 4.

The pressure reducing valve 5 moves forward and backward in conjunction with the operating member 16 of the adjustment device 6 (moves in the direction of the exhaust pipe 4), and as a result, the pressure reducing valve 5 suppresses the air flow at a specific position, and the pressure reducing speed increases. decide.

The specific structure is as shown in FIGS. 3 and 4, and in the figures, 6 represents a decompression speed adjusting device, and 16 represents operating members of the device 6.

In the figure, 17 indicates grooves 17a, 17b, 17c carved in a direction determined by a predetermined adjustment angle A.
It is a fixed housing (frame body) having..., and balls (steel balls) 19 urged by a spring 18 can be fitted into the grooves 17a, 17b, 17c....

The spring 18 is inserted and housed in a hole 20a formed in a first adjustment screw 20, and the first adjustment screw 20 is coupled to a manually operable lid 21 covered above the housing 17. do. That is, the lid 21 is inserted into the hole 20b of the adjustment screw 20.
The projections 21a of the two are fitted to combine the two. Thereby, the lid 21 and the adjustment screw 20 are rotatable about the axial direction of the protrusion 21a.

Further, the first adjustment screw 20 is threadedly engaged with a second adjustment screw 22 inside the housing 17.

Therefore, by rotating the lid 21, the balls 19 can be moved into the grooves 17a, 17b, 17c, .
It is possible to selectively fit either one of them.
By rotating the lid 21, the first adjustment screw 20
rotates, and then the operating member 16 screwed into the second adjusting screw 22 moves by a predetermined width.

As mentioned above, when the lid 21 is rotated, the ball 19 is inserted into the groove 1 of the housing 17.
7a, 17b, 17c, etc., the pressure reduction speed can be adjusted in stages.

Moreover, the ball 19 and the grooves 17a, 17b, 1
You can feel a click when mating with 7c....

According to this embodiment, the decompression speed can be set in stages corresponding to the set number of grooves, and it is possible to obtain an appropriate decompression speed for the capacity of air enclosed in the cuff.

<Effects> As described above, according to the present invention, the decompression speed can be set in stages in a blood pressure monitor that detects the pressure at which Korotkoff sounds occur and disappear during the decompression process by leaking the air sealed in the cuff. The device is equipped with a setting means for controlling the pressure, an operating member that moves by a predetermined width in accordance with the decompression speed set by the setting means, and a pressure reducing valve that is linked to the movement of the operating member. Regardless of the difference in capacity, a predetermined pressure reduction rate can be obtained, and accurate blood pressure measurement can be performed at an appropriate pressure reduction rate.

Moreover, by evacuating the same person to be measured using the same set values as in the previous step, excellent reproducibility can be achieved and the reliability of the measured values can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a blood pressure monitor according to an embodiment of the present invention, FIG. 2 is a diagram provided to explain the function of the pressure reduction speed adjusting device of the blood pressure monitor, and FIGS. 3 and 4 are diagrams showing the pressure reduction It is a figure provided in order to explain the structure of a speed adjustment device. 1... Bracelet, 4... Exhaust pipe, 5... Pressure reducing valve, 6
...Decompression speed adjustment device, 16...Operating member.

Claims (1)

[Scope of Utility Model Registration Claim] In a blood pressure monitor that detects the pressure at which Korotkoff sounds occur and disappear during the decompression process by leaking air sealed in a cuff, the pressure is measured in advance in stages to achieve a predetermined decompression rate. a setting means that is variable to a predetermined set value; an operating member that moves by a predetermined width in response to the set value set by the setting means; and a reduced pressure that adjusts the flow rate in conjunction with the operating member. A blood pressure monitor comprising: a valve;