JP3591302B2 - Wrist sphygmomanometer cuff - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cuff for a wrist sphygmomanometer used to compress a wrist when measuring blood pressure, a pulse wave, or the like from a wrist.
[0002]
[Prior art]
For example, as shown in a schematic sectional view in FIG. 5, the wrist sphygmomanometer cuff 31 generally has an air bag (not shown) for pressing the wrist portion 10 and a hook-and-loop fastener for attaching the air bag to the wrist portion 10. A cuff layer 32 including a band-shaped cloth (not shown) is provided. In the cuff 31, the band-shaped cloth is fixed in a state wound around the wrist 10 using a hook-and-loop fastener, and the arteries 13 and 14 inside the wrist 10 are compressed and blocked by the inflation of the air bag by the supply of air. I have. The human wrist 10 includes a radius 11 and a radial artery 13 on the thumb side of the hand, and an ulna 12 and an ulnar artery 14 on the little finger side.
[0003]
In the wrist sphygmomanometer cuff 31, the radial artery 13 is pressed toward the radius 11 due to the inflation of the air bag, and the radial artery 13 is pressed against the radius 11 to block blood.
However, the conventional wrist sphygmomanometer cuff as described above has the following problems. That is, in FIG. 6 (a dotted line in the figure represents an isobar) showing the pressing action of the wrist by the cuff, a cuff (not particularly shown) is first wound around the wrist 10 as shown in FIG. In this state, the wrist 10 is not strongly pressed, so that the radial artery 13 is located on the radius 11 and the ulnar artery 14 is located on the ulna 12. Here, when the air bag is inflated by the supply of air, the wrist portion 10 is compressed from the entire circumference, so that the arteries 13 and 14 move to the center of the inside of the wrist portion 10 as the compression force by the air bag increases. [See (b) and (c) of FIG. 6]. Therefore, the arteries 13 and 14 may move between the radius 11 and the ulna 12.
[0004]
In such a case, the radial artery 13, which is a measurement artery, moves between the radius 11 and the ulna 12, so that the compression force of the cuff (that is, the internal pressure of the air bag) is not transmitted to the radial artery 13, and the arterial pressure is measured. There is a problem that accuracy is deteriorated.
[0005]
[Problems to be solved by the invention]
In order to solve the above problems, Japanese Patent Application Laid-Open No. 1-265941 discloses a cuff having a structure as shown in FIG. In the cuff 41, the blood-blocking bag (air bag) 43 has a minimum size necessary to compress the radial artery 53, while the blood-blocking protrusion 47 that individually compresses the ulnar artery 54 is provided integrally. .
[0006]
When the cuff 41 is wound around the wrist 50, the ulnar artery 54 is compressed by the projection 47 integrated with the cuff 41. In this state, when the blood blocking bag 43 is expanded by the supply of air, the radial artery 53 is compressed. At this time, since the portion on the ulna 52 side including the ulnar artery 54 is pushed toward the inner center of the wrist 50 by the projection 47, the radial artery 53 is pressed toward the radius 51. Thereby, the compressive force of the blood blocking bag 43 is sufficiently transmitted to the radial artery 53.
[0007]
However, since the projection 47 is integrated with the cuff 41, the force of pressing the portion of the wrist 50 on the ulna 52 side by the projection 47 depends on the tightening force of the cuff 41 on the wrist 50, and Variations occur depending on the measurer. Therefore, even with the cuff disclosed in the above publication, the measurement accuracy of the arterial pressure cannot be improved.
The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a cuff for a wrist sphygmomanometer capable of measuring arterial pressure with high accuracy without depending on a method of tightening the cuff.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a wrist sphygmomanometer cuff according to claim 1 of the present invention includes a compression fluid bag for compressing an artery of a wrist and a compression force applied to the wrist of the compression fluid bag in the wrist. And a mounting means for mounting a compression fluid bag including the pressing means on the wrist.
[0009]
When the cuff is attached to the wrist and the fluid bag for compression is inflated, the pressing force is increased on the ulnar side from the radial side by the pressing means. As a result, the movement direction by the compression of the radial artery is induced, the radial artery does not escape between the ulna and the radius, the compression force is transmitted to the radial artery without loss, the cuff pressure and the compression pressure of the radial artery are equal, Arterial pressure can be measured accurately.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described based on embodiments.
FIG. 1 is a schematic cross-sectional view showing a state in which the wrist blood pressure monitor cuff according to the embodiment is attached to a wrist. The cuff 1 shown in FIG. 1 is provided with a pressing means 7 at a portion facing the ulna 12 side of the wrist 10 inside the cuff layer 2 (on the wrist side). Here, as shown in the enlarged views of FIGS. 2 and 3, the cuff layer 2 is inflated and inflated by the inflow and outflow of fluid (air) as a compression fluid bag for compressing the arteries 13 and 14 of the wrist portion 10. The air bag 3 includes a compressing air bladder 3 that contracts and a band-shaped cloth 4 with a hook-and-loop fastener as mounting means for mounting the air bladder 3 including the pressing means 7 on the wrist portion 10.
[0011]
The pressing means 7 increases the pressing force of the air bladder 3 on the wrist 10 on the ulna 12 side from the radius 11 side in the wrist 10. As an aspect of the pressing means 7, the ulna of the wrist 10 is used. The solid body 7 (see FIG. 2) attached to the inner portion (the wrist side portion) of the air bag 3 facing the 12 side portion or the outer portion (the side opposite to the wrist side portion) of the air bag 3 The attached solid body 7 (see FIG. 3). The inner surface (skin contact surface) 7a of the solid body 7 in FIG. 2 is a flat surface, the outer surface 7b is a curved surface, and both the inner surface 7a and the outer surface 7b of the solid body 7 in FIG. A gap can be prevented from being formed between the cuff layer 2 and the solid body 7.
[0012]
The solid body 7 is fixed to the inside or outside of the air bag 3 with, for example, an adhesive, but may be integrated with the air bag 3. Further, the material and shape of the solid body 7 are not limited as long as the solid body 7 has a hardness capable of reliably transmitting the pressing force due to the inflation of the air bag 3 to the ulna 12 side portion of the wrist portion 10. Alternatively, instead of the solid body 7, a pressing means which does not collapse even when deformed by cuff pressure, such as a high-pressure bag in which a predetermined amount of air or water is sealed in advance, may be used.
[0013]
Next, the compression action of the wrist sphygmomanometer cuff 1 configured as described above will be described with reference to FIG. In FIG. 4A, when the cuff 1 is wound around the wrist 10, the solid body 7 appropriately presses the portion of the wrist 10 on the ulna 12 side. In this state, when the air bag 3 is inflated by the supply of air, the compression force of the cuff 1 (that is, the internal pressure of the air bag 3) is increased by the presence of the solid body 7 from the radius 11 to the ulna 12 as the inflation increases. The side gets bigger. As a result, the soft tissue such as the meat at the center of the wrist 10 moves to the radius 11 side, so that the radial artery 13 moves toward the radius 11 and does not move between the radius 11 and the ulna 12. For this reason, the compression force of the cuff 1 is transmitted to the radial artery 13 without loss, the cuff pressure and the compression pressure of the radial artery 13 are equalized, the radial artery 13 is reliably blocked, and the arterial pressure can be accurately measured.
[0014]
Note that such an operation is similar not only to the cuff having the structure shown in FIG. 2 but also to the cuff having the structure shown in FIG. That is, in FIG. 3, although the solid body 7 is located outside the air bag 3, since the band-shaped cloth 4 is wound around the wrist portion 10, when the air bag 3 is inflated, the solid body 7 pushes the band-shaped cloth 4. Due to the reaction of the force, the solid body 7 presses the air bag 3, and the portion of the air bag 3 on the ulna 12 side of the wrist 10 is strongly pressed.
[0015]
Since the cuff 1 can obtain a force for pressing the portion of the wrist portion 10 on the ulna 12 side by the compression force due to the inflation of the air bladder 3, that is, the pressing force of the portion can be adjusted by the degree of inflation of the air bladder 3. Even if the tightening force of the cuff 1 on the wrist 10 is different, the problem described in the above-mentioned publication that the pressing force varies due to the tightening force of the cuff does not occur.
[0016]
In the above embodiment, an air bag is taken as the compression fluid bag, but a fluid bag using a fluid other than air (a gas such as oxygen or carbon dioxide, or a liquid such as water) may be used. In particular, when a liquid such as water is used, it is necessary to make the flow path system a liquid-tight structure so that liquid leakage does not occur.
[0017]
【The invention's effect】
Since the cuff for a wrist sphygmomanometer according to the present invention is configured as described above, the compression force of the fluid bag for compression is greater on the ulnar side than on the radial side by the pressing means, so that the movement direction due to compression of the radial artery is guided. Therefore, the radial artery will not escape between the ulna and radius, the compression force will be transmitted to the radial artery without loss, the cuff pressure and the compression pressure of the radial artery will be equal, and the arterial pressure will be accurately adjusted regardless of how the cuff is tightened Can be measured.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view showing a state in which a wrist blood pressure cuff according to an embodiment is mounted on a wrist.
FIG. 2 is a partially enlarged schematic cross-sectional view showing one aspect of a solid body in the cuff of the embodiment.
FIG. 3 is a partially enlarged schematic cross-sectional view showing another aspect of the solid body in the cuff of the embodiment.
FIG. 4 is a diagram illustrating a pressing action of the cuff of the embodiment.
FIG. 5 is a schematic sectional view showing a state in which a cuff for a wrist sphygmomanometer according to a conventional example is mounted on a wrist.
FIG. 6 is a view for explaining a compression action of the cuff of the conventional example.
FIG. 7 is a cross-sectional view showing a state in which a cuff for a wrist sphygmomanometer according to another conventional example is attached to a wrist.
[Explanation of symbols]
1 cuff for wrist sphygmomanometer 2 cuff layer 3 air bag for compression (fluid bag for compression)
4 belt-like cloth (mounting means)
7 Solids (pressing means)
10 Wrist 11, 12 Radius, ulna 13, 14 Radial artery, ulnar artery

Claims (3)

A compression fluid bag for compressing the artery of the wrist, a pressing means for increasing the compression force on the wrist of the compression fluid bag to the ulna side from the radial side in the wrist, and a compression fluid bag including the pressing means. A cuff for a wrist sphygmomanometer, comprising: mounting means for mounting on a wrist. The cuff for a wrist sphygmomanometer according to claim 1, wherein the pressing means is a solid body provided on an inner portion (a wrist portion) of the compression fluid bag facing the ulna-side portion of the wrist. . The said pressing means is a solid body provided in the outer part (part opposite to the wrist side part) of the fluid bag for compression which opposes the ulna side part of a wrist part, The claim 1 characterized by the above-mentioned. Cuff for wrist sphygmomanometer.

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