JPH06261867A - Cuff for sphygmomanometer - Google Patents

Abstract

PURPOSE:To provide the cuff for sphygmomanometer which has the internal pressure of the cuff extremely approximate to a blood pressure value and has good accuracy by eliminating the elongation of materials regardless of diameter sizes of a specimen and preventing the change in the tight contact length with the specimen when compressed air is packed into the cuff. CONSTITUTION:This cuff is constituted by providing the proper point of a pressured air housing body 2 disposed in a base body 1 with a deflecting part 3 which displaces a surface part 21 of the pressured air housing body 2 for tight contact with the specimen in parallel with a body part 12 of the base body 1 by the compressed air packed between the base body 1 and the pressured air housing body 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cuff used for measuring blood pressure, and more particularly to a cuff for a sphygmomanometer used for measuring blood pressure when worn on a finger.

[0002]

2. Description of the Related Art FIG. 10 is a sectional view showing a finger cuff of a conventional blood pressure monitor. Conventional finger cuffs have various structures. For example, in the finger cuff shown in FIG. 10, a thin sheet-shaped (film-shaped) strip made of rubber or soft plastic is polymerized and its peripheral portion is welded or adhered to form an air bag 6 for storing compressed air. is doing. The outer surface of the air bag 6 is usually wrapped with upper and lower cloths, and has a cylindrical shape. The cylindrical cuff is housed in the cylindrical outer case 7.

When measuring blood pressure, a finger is inserted into this cylindrical cuff. Then, when compressed air is filled from an air tube communicating with the air bag 6, the air bag 6 bulges like a balloon, presses the finger closely and pressurizes the finger artery to measure blood pressure.

[0004]

In the above conventional finger cuff, the size of the cuff that fits the finger is limited. That is, in the case of a finger thickness that matches the size of the cuff, when the cuff (air bag) is filled with compressed air, pressure is immediately applied to the finger.
However, in the case of a finger that does not fit the size of the cuff, for example, if the surface of the cuff (air bag surface) is in close contact with the finger,
The air bag itself (the rubber sheet itself forming the air bag) is greatly expanded by the pressure. Therefore, due to this elongation deformation,
The tension influences the pressure inside the cuff, and the pressure applied to the finger is reduced. Further, if the pressurization is continued in a state where the air bag itself is stretched and deformed, the compression force of the finger and the expansion force of the cuff itself become the internal pressure of the cuff, and the internal pressure of the cuff does not directly correspond to the blood pressure value. In addition, in the cuff of this structure, because the cuff itself (air bag itself) is stretched and deformed, in the case of a thin finger, the cross section of the cuff inflates like a balloon, and both ends in the finger insertion direction are rounded and The shape and the cuff length of the close contact vary depending on the diameter of the finger, which is disadvantageous as an error in the measured value. For example, as shown in FIG. 10, as a result of the air bag 6 swelling like a balloon, what the finger contact surface was initially L1 is expanded and expanded, resulting in a contact length of L2. Further, in the cuff having this structure, there is a disadvantage that the material forming the air bag is limited to a specific material (material having a large elastic deformation) that is easily stretched and has a strong restoring force.

Further, in the conventional cuff structure, a double-sided tape is attached to both ends of the band-shaped body to form the band-shaped air bag into a cylindrical shape,
Adhesive fixing is performed. However, the work of winding the cuff in a ring shape is extremely complicated and difficult to assemble.

The present invention solves the above problems, and when compressed air is filled, the material does not expand regardless of the diameter of the specimen (for example, finger), and the contact length does not change. An object of the present invention is to provide a highly accurate cuff for a blood pressure monitor in which the cuff internal pressure is extremely close to the blood pressure value.

[0007]

In order to achieve this object, the sphygmomanometer cuff according to claim 1 (claim 1) of the present invention has the following structure. The cuff for a sphygmomanometer is provided with a base body having a body portion, a pressurized air container provided in the base body including the body portion, and a proper place of the pressurized air container body, and the base body and the pressurized air container body. And a flexure portion for displacing the specimen adhering surface portion of the pressurized air container in parallel with the body portion by the compressed air filled between and.

In the sphygmomanometer cuff having such a structure, the cylindrical base body has the inwardly projecting protruding body portion, and the thin sheet-like pressurized air container includes the protruding body portion. It is disposed on the surface of the substrate and has a peripheral edge fixed to the substrate. Compressed air is filled between the substrate and the pressurized air container. The flexure portion of the pressurized air container is at both ends of the pressurized air container and is formed in a direction perpendicular to the finger insertion direction. In the normal state, the specimen contacting surface portion of the pressurized air container is in contact with the horizontal flat surface of the protruding body portion. When measuring the blood pressure, when inserting a sample (finger) and filling compressed air between the base body and the pressurized air container, the flexures provided in the circumferential direction rise at the edges of both ends of the pressurized air container. (Upward inward), the specimen contacting surface portion moves in parallel with the flat surface of the protruding body portion and swells together with the amount of compressed air filled. Therefore, the thin sheet-shaped pressurized air container does not expand itself (material) even when it is filled with compressed air. As a result, even if the sample (finger) is thin, there is no increase in the cuff internal pressure due to the expansion force,
Adhesion length does not differ depending on the diameter of the sample,
An accurate blood pressure measurement can be realized.

Further, the scope of claim 5 (claim 5).
The sphygmomanometer cuff described above comprises a film-shaped base body and a pressurized air container provided in the base body, wherein the base body is provided with an engaging portion on one end side and an engaging portion on the other end side. It is characterized in that it is provided with an engagement receiving portion for setting the base body including the pressurized air container into a cylindrical shape by locking.

In the sphygmomanometer cuff having such a configuration, the protruding piece (engaging portion) is provided at one end of the base body, and the slit hole (engaging receiving portion) for fitting the protruding piece is provided at the other end. ing. The cuff can be set in a cylindrical shape by simply making the band-shaped cuff into an annular shape and fitting the protruding piece into the slit hole, so that the cuff can be assembled very easily.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the first claim (claim 1).
It is sectional drawing which shows one specific Example of the cuff for sphygmomanometers which concerns on the invention of description.

As the blood pressure monitor cuff, a finger cuff is shown in the embodiment. This finger cuff includes a base 1 and the base 1
Of the pressurized air container 2 and compressed air that is provided at an appropriate position of the pressurized air container 2 and is filled between the base body 1 and the pressurized air container 2 by the compressed air container 2. And the bending portion 3 for displacing the specimen contacting surface portion 21 in parallel.

As shown in FIG. 2, the base 1 has a thin flat plate portion (bottom plate portion) 11, and a plurality of protruding body portions 12 formed in the plane of the flat plate portion 11 and bulging upward (inward). It consists of and. In the embodiment, eight body portions 12 are projected, and the upper surface (front surface) of each body portion 12 is flat. The pressurized air container 2 is a sheet-shaped or film-shaped strip having a constant width and is arranged on the surface of the base 1 (on the bulging portion 12 side). As shown in FIG. 1, the pressurized air container 2 has a rising mounting portion 22 at both ends.
Is attached to the end portion of the base body 1 in the finger insertion direction,
It is fixed to the base 1. In this state, the specimen contacting surface portions 21 of the pressurized air container 2 are in contact with the upper surfaces of the protruding body portions 12 arranged in parallel, and in the embodiment, eight pressing bulging portions A are provided. ing. Then, the base body 1 provided with the pressurized air container 2 is set in a cylindrical shape as shown in FIG. 3, and is housed in the cylindrical outer case 4.

As shown in FIG. 1, the flexures 3 are arranged at both ends of the pressurized air container 2 in a direction perpendicular to the finger insertion direction. The bending portion 3 bends the tip end portion of the rising attachment portion 22 attached to the base body 1 inward, and further bends the bending portion 31 parallel to the attachment portion 22 and the tip end portion of the bending portion 31.
The bent portion 32 is parallel to the bent portion 31. Then, the compressed air fills the space between the pressurized air container 2 including the flexure 3 and the base 1.

In the sphygmomanometer cuff having such a configuration, the flexures 3 are provided at the both edges of the finger insertion direction at right angles to the finger insertion direction. Therefore, when the finger is inserted and the compressed air is filled between the base body 1 and the pressurized air container 2, the flexures 3 provided in the circumferential direction rise on the peripheral edges of both ends of the pressurized air container 2. (Stands inward).
That is, as shown in FIGS. 1 and 3, the bent portion 31 and the bent portion 32 rise linearly with the rising attachment portion 22 as a base point. Therefore, in the normal state, the specimen adhering surface portion 21 that is in contact with the flat surface 12 of the protruding body portion moves in parallel to the flat surface of the protruding body portion 12, and swells together with the amount of compressed air filled. Pressurize the insertion finger.
Therefore, the thin sheet-shaped pressurized air container 2 does not stretch its own material. As a result, even if the specimen (finger) is thin, the inflating force does not increase the internal pressure of the cuff, and the close contact length does not differ depending on whether the specimen (finger) is thick or thin. Therefore, accurate blood pressure measurement can be realized.

In the embodiment, a plurality of (8
Although the example is shown in which the bulged portions 12 are provided, the number of the bulged portions 12 may be any number.

FIG. 6 is a cross-sectional view of essential parts showing a specific embodiment of the cuff for a blood pressure monitor according to claim 2 (claim 2). In the cuff of this embodiment, the flexible portion 3
The thickness of the rising mounting portion 22 continuous with is set larger than the thickness of the flexible portion 3. The flexible portion 3, that is, the bent portion 31 and the bent portion 32 that overlaps with the bent portion 31 in a polymerized manner are thin like the thickness of the specimen adhering surface portion 21, and the mounting portion 22 is set thick. .

Thus, by setting the rising mounting portion 22 which is continuous with the flexible portion 3 to be rigid, when the compressed air is filled between the base body 1 and the pressurized air container 2, the flexible portion 3 easily rises. It is possible to prevent the mounting portion 22 from being displaced and rising by the pressure of the compressed air to bulge outward or escape to the outside. Therefore, it is possible to more reliably realize that the sample contacting surface portion 21 moves only upward (inward).

FIG. 5 is a sectional view showing a specific embodiment of the cuff for a blood pressure monitor according to claim 3 (claim 3). In this sphygmomanometer cuff, the base body 1 has a cylindrical shape,
A concave body portion 12a that is recessed inward is formed on the inner surface. The sheet-shaped or film-shaped pressurized air container 2 is
The mounting portion 22 is fixed to the base body 1 by being sandwiched between the cylindrical outer case 4 and the outer surface of the base body 1 that are fitted to each other. In this state, the specimen contact surface portion 21 of the pressurized air container 2
Are located substantially in contact with the substantially flat bottom surface of the recessed body portion 12a. Deflection part 3 continuing to attachment part 22
Is flexed inwardly in a state of being adapted to the curved concave step portion (bent concave portion continuing to the bottom) 12b of the concave body portion 12a.

In the sphygmomanometer cuff having such a structure, when compressed air is filled between the base 1 and the pressurized air container 2 from the air tube connecting pipe 5, the inwardly bent flexible portion 3 is formed. Ascending, rising inward, and the flat, horizontal specimen contacting surface portion 21 rises in the horizontal state. That is, it projects inward. Therefore, the compressed air container 2 itself does not expand and deform due to the compressed air filled. As shown in FIG. 5, when the deflection dimension L2 is the same as the maximum displacement amount L1, no expansion force is generated even when the sample is thin.

FIG. 6 is a cross-sectional view showing a specific embodiment of the cuff for a blood pressure monitor according to claim 4 (claim 4). In this blood pressure monitor cuff, the base body 1 is a flat plate,
A flat plate-shaped body portion 12c is integrally provided on the surface of the flat plate. Then, the base body 1 including the flat body portion 12c
Is set in an annular shape and is fitted into the cylindrical outer case 4.
The pressurized air container 2 is set in the shape of a bag, is parallel to the finger insertion direction, and has the bending portions 3 at both ends in the finger insertion direction. In the flexible portion 3, the bent portion 31 and the bent portion 32 that is continuous with the bent portion 31 are overlapped with each other in the vertical direction, that is, inward with respect to the finger insertion direction. In this state, the back surface of the bag-shaped pressurized air container 2 that is continuous with the flexible portion 3 is in contact with the flat plate-shaped body portion 12c, and the sample contacting surface portion 21 that is continuous with the flexible portion 3 has the flat-plate-shaped body portion. It is located parallel to 12c.

In the sphygmomanometer cuff having such a structure, when compressed air is filled from the air tube connecting pipe 5 between the base body 1 and the pressurized air container 2, the cuff for the blood pressure monitor is parallel to the finger insertion direction and The flexible portion 3 that is superposed in the direction rises. That is, the bent portion 31 and the bent portion 32 are inwardly linear, and the specimen contacting surface portion 21 rises inward in a horizontal state. Therefore, the pressurized air container 2 itself does not expand and deform. As shown in FIG. 6, the maximum amount of displacement L1 when the cuff surface has no expansion force is 2 × L2, and even if the finger is thin, the expansion force does not increase the cuff internal pressure.

FIG. 7 is a plan view showing a concrete embodiment of the cuff for a blood pressure monitor according to claim 5 (claim 5). This cuff for a blood pressure monitor includes a film-shaped substrate 1,
It comprises a pressurized air container 2 arranged on one side of the base 1. On one surface of the film-shaped substrate 1, a mounting portion (lower cuff) 15 having a plurality of bulging body portions in the surface is provided. The base 1 and the mounting portion 15 are insert-molded. Further, the base 1 is provided with an engaging portion (engaging projection piece) 13 on one end side, and an engaging receiving portion (engagement receiving slit hole) for engaging with the engaging projection piece 13 on the other side. 14 is provided. The engagement projection piece 13 has a stepped portion 13a formed by narrowing the projection base portion inward, and the width of the stepped portion 13 is set to be substantially equal to the length of the engagement receiving slit hole 14.

Further, FIG. 9 shows an engaging portion 13 and an engaging receiving portion 14.
FIG. 11 is a plan view showing a modified example of the above. In this embodiment, the engaging portion 13 is provided with an inward fitting notch groove 13 at one end, and an engaging notch groove 14 at a position different from the fitting notch groove 13 at the other end. ing.

In the sphygmomanometer cuff having such a structure, the base 1 is set in an annular shape, and the engaging portion 13 and the engaging receiving portion 14 at one end are fitted and locked, for example, as shown in FIG. As described above, the cylindrical cuff can be easily assembled, and when the cuff is incorporated into the main body, it can be assembled very easily.

[0026]

According to the cuff for a blood pressure monitor of claims 1, 2, 3, and 4 (claims 1, 2, 3, and 4), the pressurized air provided on the base body. Since the compressed air filled between the base body and the pressurized air containing body is provided at a proper position of the containing body, a flexure portion for deforming the specimen contacting surface portion of the pressurized air containing body into a parallel shape is provided, Due to the rising displacement of the flexible portion, the material of the pressurized air container itself does not expand and deform, and the contact surface area with respect to the sample does not change even if the thickness of the sample changes. Therefore, since the specimen is pressed by the displacement of the flexure, not the shape change due to the expansion force of the surface for contacting the sample, the internal pressure of the cuff does not increase due to the expansion force, and the internal pressure of the cuff approximates the blood pressure value as it is. Further, when the pressure is applied, the cross-sectional shape of the cuff does not inflate like a balloon as in the conventional case, so the amount of air on the pressurization is small, and the SN ratio of the detected pulse wave becomes large. Further, since the material itself of the pressurized air container does not expand, the material is not limited to the material having a large elastic deformation as in the past, and the material can be selected in a wide range.

Further, claim 5 (claim 5)
In the blood pressure monitor cuff described above, since the engaging portion is provided at one end of the base body and the engaging receiving portion is provided at the other end, the belt-like cuff can be formed simply by engaging the engaging portion with the engaging receiving portion. It can be annularly fixed by simple work, and the work of incorporating the cuff into the main body can be easily realized.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a blood pressure monitor cuff according to an embodiment.

FIG. 2 is a plan view showing a cuff for a blood pressure monitor of Example.

FIG. 3 is a cross-sectional view showing a blood pressure monitor cuff according to an embodiment.

FIG. 4 is a cross-sectional view of essential parts showing an embodiment of the cuff for a blood pressure monitor according to claim 2.

FIG. 5 is a cross-sectional view of essential parts showing an embodiment of the cuff for a blood pressure monitor according to claim 3.

FIG. 6 is a cross-sectional view of essential parts showing an embodiment of the cuff for a blood pressure monitor according to claim 4.

FIG. 7 is a plan view showing an embodiment of the cuff for a blood pressure monitor according to claim 5;

FIG. 8 is a perspective view showing an embodiment of the cuff for a blood pressure monitor according to claim 5;

FIG. 9 is a plan view showing another embodiment of the sphygmomanometer cuff according to claim 5;

FIG. 10 is a cross-sectional view of an essential part showing a conventional cuff for a blood pressure monitor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base body 2 Pressurized air container 3 Deflection part 21 Surface part for specimen adhesion

Front page continuation (72) Inventor Kota Fukumura 24 Yamanouchi Yamanoshitamachi, Ukyo-ku, Kyoto City OMRON Life Science Institute

Claims (5)

[Claims] 1. A base body having a body portion, a pressurized air container provided in the base body including the body portion, and a base body and a pressurized air container body provided at appropriate places in the pressurized air container body. A cuff for a sphygmomanometer, which comprises a flexure portion for displacing the specimen contacting surface portion of the pressurized air container in parallel with the body portion by the compressed air filled in between. 2. The cuff for a sphygmomanometer according to claim 1, wherein the mounting portion of the pressurized air container to the base is set to be thicker than the thickness of the flexible portion. 3. The body portion of the base body is provided with an inward dent portion on the inner surface thereof, and the bent portion of the pressurized air container arranged on the base body is in contact with the dent surface of the dent body portion. The cuff for a blood pressure monitor according to claim 1, wherein the cuff is bent inward. 4. The body portion of the base body is formed in a flat plate shape, the pressurized air container disposed in the flat plate body portion is formed in a bag shape, and the flexible portion is superposed in a direction parallel to the specimen insertion direction. The cuff for a sphygmomanometer according to claim 1, wherein the cuff bends into a shape. 5. A film-shaped base body and a pressurized air container provided in the base body, wherein the base body is provided with an engaging portion on one end side and is engaged with the engaging portion on the other end side. Thus, the sphygmomanometer cuff including the engagement receiving portion that sets the base body including the pressurized air container into a cylindrical shape.