JPH0345239A - Kerf device for blood pressure measurement - Google Patents

Abstract

PURPOSE:To carry out the blood pressure measurement with high precision by installing a microphone in a holding ring and installing a part of the peripheral part of the holding ring onto the inside surface of a kerf. CONSTITUTION:A kerf 21 consists of a two-layer structure which is formed by partially welding an inside kerf body 21a and an outside kerf body 21b. A sensor holding ring 23 is welded at a constant position on the inside surface of the inside kerf body 21a, and a microphone M is fitted inside the holding ring 23. Therefore, the shift of the position relation between the kerf and the microphone during the set and reset of the kerf device for a blood pressure measurement position is prevented, and the microphone can be correctly positioned on the artery vein at the blood pressure measurement position, and the blood pressure measurement can be carried out. Further, as for a rectilinear part P8 which is separated by a prescribed distance from the installation position of the holding ring 23, the inside and outside surfaces of the outside kerf body 21b are welded, and the welded part P8 serves as the suppression part for suppressing the bulging-out of the kerf 21. Therefore, the microphone is positioned always at a proper bulging-out part of the kerf, and can be closely attached onto the artery vein at the blood pressure measurement part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blood pressure measurement cuff device that measures blood pressure using a cuff and a microphone.

[Prior Art] Conventionally, as this type of cuff device for measuring blood pressure, there is a cuff device as shown in FIGS. 6 to 8 (hereinafter, the arm is the fixed site for blood pressure measurement).

In this cuff device, a cuff I made of natural rubber is housed inside a cuff case 2, and the cuff 1 is attached to the cuff case 2 with an O-ring 3.

The cuff 1 is originally formed into a flat plate with a rectangular plane, and inside thereof, a pressurized air introduction space is formed over the entire length, and the cuff 1 is rounded into a letter 0 shape and attached to the case 2. An introduction pipe 4 for guiding pressurized air into the pressurized air introduction space is attached to the right side edge of the cuff 1 in FIG.
Being beaten. A slit 2a is formed in the case 2 and extends from the right end to the left end in FIG. The case 2 and the cuff I are integrally covered.A jack is attached to the opening on the left side of the arm cuff 5 in FIG. 6, so that it can be closed.

A pocket 5a for storing a microphone M is formed inside the wristband cloth 5. This microphone M
This is to electrically detect the Korotkoff sound of the arterial blood vessel of the arm inserted inside the cuff I.

Reference numeral 6 denotes a fixing metal fitting, which is attached to the case 2 from above the wristband cloth 5 with a screw 7, and is attached to the case 2 through the slit 2a of the case 2.
This prevents the arm cuff 5 from spreading and also prevents the arm cuff 5 from shifting. Further, the case 2 covered with the wristband cloth 5 is attached to cushion fittings 9 and 11 with screws 8. A hard urethane arm cuff cushion 10 is bonded to the lower side of this crank fitting 9, and a cushion fitting 11 is further bonded to the lower side of the arm cuff crank 10.

When using the conventional cuff device configured as described above, the arm where the blood pressure will be measured is first inserted into the case 2 from the left side in FIG. 6. At this time, the arterial blood vessel of the arm is placed under the microphone M to face it. Then, pressurized air is introduced into the pressurized air introduction space in the cuff 1 through the introduction tube 4, and while compressing the arm, the microphone M detects the Korotkoff sound of the arterial blood vessel.

[Problems to be Solved by the Invention] However, such conventional cuff devices have the following problems.

■Since the microphone M is stored in the pocket 5a of the arm cuff 5, the positional relationship between the arm cuff 5 and the cuff I shifts when the arm is inserted and pulled out, and the microphone M shifts from above the arterial blood vessel. , there is a risk that accurate measurements may not be possible.

(2) The cuff 1 is partially suppressed from swelling by the O-ring 3, and the microphone M is originally positioned exactly at the moderately swollen portion of the cuff 1, so that it rests on top of the arterial blood vessel. However, due to the misalignment between the arm cuff 5 and the cuff 1, the microphone M comes off from the moderately bulging part of the cuff 1, and the microphone M
There is a risk that the adhesion may deteriorate, leading to deterioration of measurement accuracy.

■Since the cuff I is made of natural rubber, it is prone to pinholes and is not suitable for mass production.

This invention aims to solve such problems.

[Means for Solving the Problems] The cuff device for blood pressure measurement of the present invention introduces pressurized air into the inside of the cuff, sets the cuff so as to wrap it around the blood pressure measurement site, and sets the cuff around the blood pressure measurement site. In a cuff device for blood pressure measurement that detects the sound of an arterial blood vessel using a microphone, the microphone is installed within a retaining ring, and a portion of the circumference of the retaining ring is attached to the inner surface of the cuff. Features.

[Function] The cuff device for blood pressure measurement of the present invention has a microphone M attached to a fixed position on the inner surface of the cuff (:I), so that the positions of the cuff and the microphone can be adjusted when setting and resetting the cuff device to the blood pressure measurement site. This ensures that the relationship does not deviate.This allows the microphone to be accurately positioned over the arterial blood vessel at the blood pressure measurement site, thereby achieving highly accurate blood pressure measurement.

In addition, by suppressing the bulge of the cuff at a portion that is a predetermined distance away from the mounting position of the microphone, the microphone is always positioned at a moderately bulging portion of the cuff and is brought into close contact with the arterial blood vessel at the blood pressure measurement site.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

In the figure, 2I is a cuff made of synthetic resin such as thermoplastic polyurethane resin or vinyl chloride (for example, 0.3 mm thick).
), and inside thereof, two pressurized air introduction spaces Sl and S2 are formed in two layers. Cuff 21 was originally
The inner cuff body 21a is formed into a rectangular plane and is rounded into a 0 shape, and the inner cuff body 21a is rectangular in plan and forms the inner introduction space S+, and the outer cuff body is rectangular in plane and forms the outer introduction space S2. It has a two-layer structure in which 21b is partially welded. That is, the opposing surfaces of the inner cuff body 21a and the outer cuff body 21b, that is, the outer surface of the inner cuff body 21a (-L plane in FIG. 3) and the inner surface of the outer cuff body 21b (the third
(lower surface in the figure), the four-sided portion PI forming a plane rectangle
, P2. P3. P4 are welded together.

Further, an inner cuff body 21 is provided on the outer surface of the outer cuff body 21a.
A first introduction pipe 22a leading to the outer cuff body 21b and a second introduction pipe 22b leading to the outer cuff body 21b are attached. That is, regarding the first introduction tube 22a, the outer surface and the inner surface of the outer cuff body 21a and the outer surface of the inner cuff body 21b are welded together in the planar inner tank portion P6 surrounding it, so that the inner cuff It communicates with the introduction space SI of the body 21a.

On the other hand, the second introduction pipe 22b is directly welded to the outer surface of the outer cuff body 2]a, thereby communicating with the introduction space S2 of the outer cuff body 21b.

Further, a sensor retaining ring 23 is welded to a fixed position on the inner surface of the inner cuff body 21a. This retaining ring 2
3 is an elastic ring into which the microphone M is fitted (J), as shown in FIG.
A part of the circumference of the retaining ring 23 is welded to the arcuate portion P7 (see FIG. 2) on the inner surface of the retaining ring 23. The arcuate portion P7 is set at a position away from the center line L (see FIG. 2) in the width direction of the cuff 2I.

In addition, in the cuff 2I, a straight portion P8 located a predetermined distance from the attachment position of the retaining ring 23 is connected to the outer cuff body 2.
The inner and outer surfaces of 1b are welded together. therefore,
This welded portion P8 serves as a suppressing portion that suppresses the swelling of the cuff 2I, as shown in FIG.

The cuff 21 as described above is rolled into a 0-shape and is housed inside a hard cuff case 24.

The arm cuff case 24 has a cylindrical shape, and the first part of the cuff 21 is disposed on its outer circumference. The first tube is positioned by passing the second introduction tubes 22a and 22b from the inside to the outside. Second positioning hole 24
a, 24 b are provided.

The arm cuff case 24 containing the cuff 2I is a bag-shaped arm cuff cloth 25.
It is stored inside. This armband cloth 25 is made by sewing together the right end side peripheries of the inner cylindrical part 25a and the outer cylindrical part 25b in FIG.
An annular space opening to the left in the figure is formed. The cuff case 24 containing the cuff 2I is inserted through the left opening of the annular space. The outer cylindrical portion 25b has holes 25c and 25 through which the first and second introduction tubes 22a and 22b of the cuff 21 pass outward.
d has been opened. Furthermore, a hole (not shown) through which the electric cord of the microphone M is passed is provided on the right end side of the armband cloth 25 in FIG.

Arm cuff case 2 stored in arm cuff cloth 25 together with cuff 2I
4 is attached to the second part of the cushion fitting 27 with a screw 26. A hard urethane cuff cushion 28 is bonded to the lower side of the cushion metal fitting 27, and a cushion metal fitting 2 is attached to the lower side of the cuff cushion 28.
9 is glued.

Next, the effect will be explained.

First, the arm where the blood pressure will be measured is inserted into the cuff case 24 from the direction of arrow A in FIG. And microphone M
Opposing the arterial vessels of the arm under the.

Then, number one. Pressurized air is introduced into the inner and outer introduction spaces S1 and S2 through the second introduction tubes 22a and 22b, and the Korotkoff sound of the arterial blood vessel is detected by the microphone M while compressing the arm.

In this way, blood pressure measurement is performed using the arm as the blood pressure measurement site.

By the way, in the cuff 2I having a double structure, when pressurized air is introduced into the inner and outer introduction spaces Sl and S2, the bulges of the overlapping central parts cancel each other out,
As a result, the difference in bulge between the central portion and the peripheral portion of the cuff 2I is kept small. Therefore, the cuff 21 inflates uniformly, the width of hemostasis is accurately determined, and the tightness against the arm is improved.

FIG. 5 shows a double-layered cuff similar to the cuff 2I when it is flattened and inflated. In addition, the introduction spaces Sl, S
It is not necessary to specifically partition the cells into two layers, and a multiplex structure of three or more layers may also be used.

Further, since the microphone M is attached to a fixed position on the inner surface of the cuff 2I, the positional relationship between the cuff 21 and the microphone M will not shift due to insertion and withdrawal of the arm.

In addition, since the introduction tubes 22a and 22b are attached to the outer surface of the cuff 2I, and the introduction tubes 22a and 22b are positioned in the positioning holes 24a and 24b of the arm cuff case 24, the cuff 2I can be inserted and withdrawn by inserting and pulling out the arm.
There is no possibility that I will be out of alignment. Moreover, since the cuff 21 is suppressed from bulging at a portion P8 that is a predetermined distance MM from the mounting position of the microphone M, the microphone M is always located at a moderately bulging portion of the cuff 21.
It will be in close contact with the arterial blood vessels of the arm.

Furthermore, the cuff 21 made of synthetic resin has superior processability compared to conventional cuffs made of natural rubber, and is suitable for mass production.

Moreover, pinholes are hard to come by. Further, the same effect can be obtained even if the cuff 2 is made of synthetic rubber.

[Effects of the Invention] As explained above, since the cuff device for blood pressure measurement of the present invention has the microphone M attached to a fixed position on the inner surface of the cuff, it is difficult to set and reset the cuff device to the blood pressure measurement site. , the positional relationship between the cuff and the microphone will not shift. Therefore, by accurately positioning the microphone at the blood pressure 7111 + the arterial blood vessel at a specific site, it is possible to perform highly sensitive blood pressure measurement.

In addition, by suppressing the bulge in the part of the cuff that is a predetermined distance M away from the location where the microphone is attached, the microphone is always positioned at an appropriate bulge in the cuff, and is placed in close contact with the arterial blood vessel at the blood pressure measurement site. be able to.

Furthermore, by making the cuff made of synthetic resin, it is possible to improve processability as compared to conventional cuffs made of natural rubber, thereby realizing improvement in mass productivity.

Furthermore, the cuff device for blood pressure measurement of the present invention can be applied as a cuff device in which the cuff is arranged inside a case and a blood pressure measurement site such as an arm is inserted into the case, and it can also be used for blood pressure measurement on an arm or the like. It can also be used as a cuff device in which the cuff is directly wrapped around the body part, and its range of applications is extremely wide.

[Brief explanation of drawings]

1 to 5 are diagrams for explaining one embodiment of the present invention, in which FIG. 1 is an exploded perspective view, FIG. 2 is a developed view of the cuff, and FIG. - Sectional view along line ■, 4th
The figure is an enlarged cross-sectional view of the microphone installation part.
The figure is a side view of the two-layered cuff when it is inflated while remaining flat. 6 to 8 are diagrams for explaining the conventional example, in which FIG. 6 is an exploded perspective view, FIG. 7 is a front view, and FIG.
FIG. 7 is a side view of the layered cuff when it is inflated while remaining flat. 21...Cuff, 21a...Inner cuff body, 2 1b...Outer cuff body, 2a, 22b...Introduction tube, 3...・Sensor holding ring, 4...Archive case, 25...Archive cloth, 1, R2... Pressurized air introduction space,...Microphone.

Claims (3)

[Claims] (1) In a cuff device for blood pressure measurement, in which pressurized air is introduced into the inside of the cuff, the cuff is set so as to be wrapped around the blood pressure measurement site, and the Korotkoff sound of the arterial blood vessel at the blood pressure measurement site is detected by a microphone. . A cuff device for blood pressure measurement, characterized in that the microphone is attached within a retaining ring, and a part of the circumference of the retaining ring is attached to an inner surface of the cuff. (2) The cuff device for blood pressure measurement according to claim 1, wherein the cuff is provided with a suppressing portion that suppresses swelling of the cuff at a position a predetermined distance away from the attachment position of the retaining ring. (3) The cuff device for blood pressure measurement according to claim 1 or 2, wherein the cuff is made of synthetic resin.