JPH02280734A - Cuff for spygmomanometer - Google Patents

Abstract

PURPOSE:To facilitate manufacture and secure the sufficient blood suppressing effect and permit the blood pressure measurement with high precision by constituting the inner surface side which contacts a living body in measurement from the material having the larger stretchability and the outer surface side from the material having the less stretchability. CONSTITUTION:Since a cuff is constituted by only welding the outer surface 2 and inner surface 3 of the cuff and an air pipe 4, easy manufacture is permitted. Since the outer surface 2 of the cuff is made of the material having the smaller stretchability, the outward expansion is little in the pressurizing process of an air chamber 8, and since the inner surface of the cuff is made of the material having the larger stretchability, the air chamber 8 can be closely attached onto the measurement part, accompanied with the pressure increase of the air chamber 8. Therefore, the blood suppressing effect is improved. Further, even if creases 11 are generated on the inner surface, the creases 11 move gently and continuously, accompanied with the pressure increase, and the generation of frictional sound between skin is prevented, and the abrupt generation of pressure variation is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blood pressure cuff (hereinafter simply referred to as a cuff) used for non-invasive blood pressure measurement.

[Prior Art] In recent years, automatic blood pressure monitors that can easily measure blood pressure even in the garden have become popular, and various cuff configurations are known.

An example is shown in FIGS. 4 and 5. FIG. 4 shows a schematic bottom view of a conventional cuff 21 developed, and FIG. 5 shows a schematic bottom view of the conventional cuff 21.
1 shows a schematic bottom view of FIG. The cuff was proposed by the present applicant in Japanese Patent Application No. 12-190500.

In the cuff 21, the bottom view in FIG. 5 shows the cuff inner surface 2211 that contacts the upper arm when worn, and the top view in FIG. 4 shows the cuff outer surface 23, which is the main surface of the cuff inner surface 22. Furthermore, an air bag 25 for blood ischemia is built in between the approximately central portion 24a and one end portion 24b of the cuff 21, and air is supplied from approximately the intermediate portion 26 of the 4i1 edge to the air bag 25. An injection pipe 27 protrudes. Further, a hanging sheet 28 having a rectangular outer shape and having a convex hanging member implanted therein is hung near the tip 24b of the cuff outer surface 28. Further, on the inner surface of the cuff 22, a cloth-like sheet 28 made of stretchable cloth is used between the center portion 24a and one end portion 24b, and between the center portion 24a and the other end portion 24c, A terry fabric sheet 30 that is hung on the hanging sheet 29 is used. In particular, the fabric sheet 28 is made of stockinette fabric such as knit or chassis fabric, but is not limited to this as long as the stretch direction extends over all 360 degrees on the sheet surface.

Further, other conventional examples of cuffs are shown in FIGS. 6 and 7. 6th
The figure is a perspective view of the cuff, and FIG. 7 is a configuration diagram thereof. cuff 3
1 uses a fiber-reinforced material 32 in which fibers 38 with small elongation are laminated with a sheet 38 made of polyvinyl chloride or the like, so that the air capacity of the air chamber 40 does not expand beyond a certain level during blood pressure measurement. It is formed by weaving, bending, and high frequency welding from the point indicated by the dashed line in Fig. 7. In addition, in FIGS. 6 and 7, 33 is an air pipe;
4 and 35 are surface fasteners having a hook on one side and a loop on the other; 36 is a high frequency welded portion; 37 is a flange; 4
1 indicates the outer surface of the cuff, and 42 indicates the inner surface of the cuff.

[Problems to be Solved by the Invention] In the conventional example shown in FIGS. 4 and 5 above, since the stretchable cloth sheet 28 is attached to the surface that comes into contact with the living body, the cuff 21 is When the air bag 25 is pressurized after being attached to a living body, the cloth-like sheet 28 on the contact surface with the living body does not slide (progresses) on the surface of the living body, so that during the pressurization process of the air bag 25, the skin and cuff 21 It is possible to prevent discontinuous vibrations due to the sliding friction that occurs during the process, and it is also possible to prevent the accuracy of measured values from decreasing. During the pressurization process of the air bag 250, friction between the cuff inner surface 22 and the air bag 25 is unavoidable, and the friction sound may become noise.
In order to manufacture the cuff, the cuff inner surface 22 and the cuff outer surface 23 are first sewn together to form a bag-like body, the air bag 25 is inserted into the body, and the remaining part is sewn together. It was complicated and expensive.

On the other hand, in the conventional example shown in FIGS. 6 and 7, manufacturing is easy because all that is required is to bend the high-frequency weldable cloth sheet 33 and perform high-frequency welding. Since the chamber 40 is integrally formed,
As in the case of the conventional example shown in FIGS. 4 and 5, the air chamber 4
Noise due to friction between the inner surface of the cuff 42 and the inner surface 42 of the cuff does not occur.

However, the cuff 31 does not necessarily have sufficient blood ischemic performance, and there is a problem in that noise is likely to occur. In other words, since the cuff outer surface 41 and the cuff inner surface 42 are made of the same cloth material F, the cuff inner surface 42 is made of a thick material with little elasticity. As shown in the schematic cross-sectional view of FIG. does not disappear and leaves a large depression 44, and since the depression 44 can be enlarged, the cuff inner surface 42 does not come into close contact with the measurement site, and the ischemic performance is reduced.
It is not always sufficient.

In order to make the depression 44 smaller, it is possible to attach the cuff 31 loosely to the measurement site or to reduce the cuff pressure. There is a possibility that the length of the cuff 42 in close contact with the attachment site becomes smaller, and the effective range of pressure transmission of the cuff becomes smaller.

This problem arises because the cuff inner surface 42 has low elasticity as described above.

In addition, since the cuff inner surface 42 has low elasticity, the wrinkles 43
Alternatively, the depression 44 suddenly deforms, resulting in a sudden pressure change. Therefore, in a device that detects and measures pressure changes, rapid pressure changes due to the deformation of wrinkles 43 and depressions 44 are detected as noise, and Korotkoff sounds are also detected and measured. In this case, the sound generated due to the rapid pressure change is detected as noise, and in both cases there is a problem in measurement accuracy.

The present invention solves the problems of these conventional examples, and is easy to manufacture, does not generate noise, fits tightly to the measurement site during measurement, and can be used even when the cuff is loosely attached. The object of the present invention is to provide a blood pressure cuff that provides sufficient ischemic performance.

[Means for Solving the Problem] In order to achieve the above object, the blood pressure cuff of the present invention has the following features:
This is a blood pressure cuff whose unfolded shape is approximately band-shaped and has an integrally formed air chamber.The inner surface that comes into contact with the living body during measurement is made of a highly elastic material, and the outer surface is made of a stretchable material. It is characterized by being made of a material with low elasticity.

[Function] According to the above configuration, when the air chamber is pressurized during measurement, the inner surface that is in contact with the measurement site has high elasticity, so it presses against the measurement site while crushing the depressions caused by wrinkles. In close contact.

Furthermore, even when the cuff is worn loosely, the inner surface has great elasticity, so it stretches so as to come into close contact with the measurement site.

[Example code] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of the cuff of this embodiment, and FIG. 2 is a configuration diagram thereof. In FIGS. 1 and 2, a cuff 1 is composed of a cuff outer surface 2, a cuff inner surface 3, and an air tube 4. The cuff outer surface 2 and the cuff inner surface 3 are welded together by high-frequency welding, and the air tube 4 is attached to the cuff outer surface 2 and the cuff inner surface 3. An air chamber is formed in the part. Further, a hook and loop fastener (loop) 5 is provided on the outer surface 2 of the cuff, and a hook and loop fastener (hook) 6 is provided on the inner surface 3 of the cuff.
are welded together using high frequency welding.

The material forming the cuff inner surface 3 is a material with high elasticity, such as a soft polyvinyl chloride sheet with a large amount of plasticizer, and the material forming the cuff outer surface 2 is a material with low elasticity, e.g. , as shown in Figure 2,
A fiber-reinforced polyvinyl chloride sheet is used in which fibers 10 are laminated with a polyvinyl chloride sheet 9 to reduce elasticity. The air tube 4 is made of a material that can be high-frequency welded, such as a soft polyvinyl chloride tube, and is
and welded by the cuff inner surface 3 and the high frequency welding part 7,
An air chamber 8 is formed.

In this way, the cuff of this embodiment can be constructed by simply welding the cuff outer surface 2, the cuff inner surface 3, and the air pipe 4.
It is clear that it is easy to manufacture.

FIG. 3 is a main cross-sectional view of the cuff of this embodiment in the form of a cane in which the cuff is wrapped around the arm and is attached to measure blood pressure, but the air tube 4 is omitted. Since the cuff outer surface 2 is made of a material with low elasticity, it does not bulge outward even during the pressure increase process of the air chamber 8, and the cuff inner surface 3 is made of a material with large elasticity, so the air chamber 8, it comes into close contact with the measurement site as the pressure increases.

Therefore, the blood ischemia effect is also good. Furthermore, even if "wrinkles" as shown by 11 in FIG. 3 occur, the wrinkles 11 move slowly and continuously as the pressure increases, so no large frictional noises are generated between the wrinkles and the skin. Furthermore, sudden pressure changes do not occur.

As described above, the cuff of this embodiment can be applied to both a blood pressure monitor that detects Korotkoff sounds using a microphone and a blood pressure monitor that detects pressure changes in an air chamber.

Note that the present invention is not limited to the above embodiments, and various modifications are possible. For example, similar effects can be obtained by using acrylonitrile butadiene resin (NBR) or polyvinyl chloride plasticized with polyurethane or the like as a highly elastic material used for the inner surface of the cuff. Furthermore, although the above embodiments have been described as using high frequency welding, it is clear to those skilled in the art that heat fusion or adhesion may also be used.

[Effects of the Invention] As is clear from the above description, the blood pressure cuff of the present invention is easy to manufacture, adheres well to the measurement site during measurement, provides a sufficient ischemic effect, and is effective against the skin. Since there is no fricative noise or sudden pressure changes, it is possible to measure blood pressure with high accuracy.

Furthermore, even when the cuff is worn loosely, it will adhere well to the measurement site and provide a sufficient blood ischemic effect.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a configuration diagram thereof, FIG. 3 is a main sectional view in a measurement state, FIG. 4 is a diagram showing a first conventional example, and I! 5 is a configuration diagram thereof, FIG. 6 is a main sectional view in its measurement state, FIG. 7 is a diagram showing the second conventional example, and FIG. 8 is a main sectional view in its measurement state. 1... Cuff, 2... Cuff outer surface, 3... Cuff inner surface,
4...Air pipe, 5...Loop fastener (loop), 6
-... Hook and loop fastener (hook), 7 - High frequency welding part, 8... Air chamber, 9... Polyvinyl chloride sheet,
10-...Fiber, 11...Wrinkle. Figure 2 Figure 3 Figure 6 Figure 7

Claims (3)

[Claims] (1) A blood pressure cuff whose unfolded shape is approximately band-shaped and has an integrally formed air chamber, and the inner surface that comes into contact with the living body during measurement is made of highly elastic material to serve as the outer surface. A blood pressure cuff characterized in that the side is made of a material with low elasticity. (2) The material with high elasticity and the material with small elasticity are each in the form of a sheet that can be welded, fused, and/or bonded, and the blood pressure cuff welds, fuses, and/or adheres the sheets to each other. The blood pressure cuff according to claim 1, characterized in that it is formed by adhesion. (3) A hook member is provided on one end of the inner surface of the blood pressure cuff and on the outer surface of the blood pressure cuff, the hooking member being detachable from the one end of the inner surface.
Blood pressure cuff as described.