JP3922087B2 - Cuff for wrist blood pressure monitor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sphygmomanometer cuff used in a sphygmomanometer that is mounted on a living body and measures blood pressure, and more specifically, a wrist sphygmomanometer cuff used in a wrist sphygmomanometer that measures blood pressure at the wrist. Related to the structure.
[0002]
[Prior art]
In recent years, self-management of blood pressure is increasingly regarded as important, and a wrist sphygmomanometer that can be measured more easily than the upper arm as a home sphygmomanometer has been widely used in the home. A schematic configuration of a conventional wrist blood pressure monitor 100 will be described with reference to FIGS. 27 and 28. FIG. 27 is an overall perspective view showing the appearance of the wrist sphygmomanometer 100, and FIG. 28 is a block diagram showing the internal configuration of the wrist sphygmomanometer 100. Referring to both figures, a wrist sphygmomanometer 100 includes a main body 101 in which a blood pressure measurement control device is incorporated, and a wrist sphygmomanometer cuff 102 to which the main body 101 is attached.
[0003]
A display 103 and a measurement start switch 104 are provided on the outer surface of the main body 101, and a pressure sensor 105, a pressure pump 106, an exhaust valve 107, and a CPU 108 for controlling these devices are provided inside. ing.
[0004]
The wrist sphygmomanometer cuff 102 stores air sent out from the pressurizing pump 106 and is provided with an air bag 109 used to compress the artery of the wrist, and the air bag 109 on the inner surface side thereof. A band-shaped band 110 for wearing on the wrist and a hook-and-loop fastener 111 for winding and fixing the band 110 around the wrist are provided.
[0005]
Next, blood pressure measurement using the wrist sphygmomanometer 100 having the above configuration will be described with reference to FIGS. 29 to 31. 29 to 31, for convenience, only the wrist blood pressure cuff 102 is illustrated, and the main body 101 is not illustrated. FIG. 29 shows an outline of a cross-sectional structure along the longitudinal direction of the wrist-type blood pressure monitor cuff 102 before being attached to the wrist, and air has not yet been supplied into the air bag 109. FIG. 30 is a sectional view at the time of contraction showing a state in which the wrist sphygmomanometer cuff 102 is attached to the wrist 1. FIG. 31 is a cross-sectional view at the time of inflation showing a state in which the wrist-type sphygmomanometer cuff 102 is attached to the wrist 1.
[0006]
29, the wrist bag sphygmomanometer cuff 102 is fixed to a position where the air bag 109 faces the radial artery 5 and the ulnar artery 7 of the wrist 1 using a band 110 as shown in FIG. Here, as shown in FIG. 30, the main anatomy of the wrist portion 1 includes a rib 2 positioned on the thumb side, an ulna 3 positioned on the little finger side, and a deep finger flexion tendon 4a positioned in the vicinity of the rib 2. Long palmar tendon 4b, radial artery 5, superficial digital flexor tendon 6a located in the vicinity of ulna 3, ulnar side carpal tendon 6b, ulnar artery 7 and the like.
[0007]
Next, with the wrist-type sphygmomanometer cuff 102 attached to the wrist 1, air is supplied from the pressure pump 106 to the air bag 109 as shown in FIG. After the artery 5 and / or the ulnar artery 7 (or both) are compressed, the pressure in the air bladder 109 is measured by the blood pressure sensor 105 in the process of exhausting the air in the air bladder 109 by opening the exhaust valve 107, and as a result Blood pressure measurement data is obtained.
[0008]
[Problems to be solved by the invention]
Here, it is said that the wrist blood pressure monitor is inferior in blood pressure measurement accuracy compared to the upper arm blood pressure monitor. This may be due to insufficient pressure on the wrist artery. Arterial compression force deficiency means that the pressure on the inner wall of the compressed blood vessel (hereinafter referred to as blood vessel inner wall pressure) is smaller than the pressure in the air bag. If the blood vessel inner wall pressure and the air bag internal pressure are equal, accurate blood vessel inner wall pressure can be obtained by measuring the air bag internal pressure, and as a result, accurate blood pressure measurement can be performed.
[0009]
However, when the compression force is insufficient, the air bag internal pressure becomes higher than the blood vessel inner wall pressure, so that the air bag internal pressure is directly measured as the blood pressure, and as a result, the blood pressure is measured high. As a cause of this lack of compression force, it is conceivable that the wrist is compressed by an air bag (hereinafter referred to as a cuff width).
[0010]
The cuff width of the upper arm type sphygmomanometer has a guideline defined by AHA (American Heart Association), but there is no guideline for the cuff width of the wrist sphygmomanometer. For this reason, the cuff width is applied to the wrist as it is, “a constant width of the diameter of the adaptive arm circumference”, which is a regulation method in the case of the upper arm blood pressure monitor. The cuff width of the current wrist blood pressure monitor is set to about 50 mm to 60 mm. However, even if the cuff width of the wrist type sphygmomanometer is set based on this regulation method, insufficient compression force is generated. This is because the wrist part has many muscles and tendons that do not exist in the upper arm part, and the bones are also located relatively close to the epidermis. It is believed that there is.
[0011]
As shown in the sectional view of FIG. 31, sufficient air is supplied into the air bag 109, and the air bag 109 is inflated toward the wrist 1 side. However, the presence of the rib 2 and the long palm flexion tendon 4b inhibits the inflation of the air bag 109, and the radial artery 5 is not sufficiently compressed, and the presence of the superficial digital flexor tendon 6a and the ulnar side carpal tendon 6b It can be seen that the expansion of 109 is inhibited and the ulnar artery 7 is not sufficiently compressed.
[0012]
Originally, when the compression of the artery by the air bag 109 is not obstructed at all, as shown in the schematic diagram of FIG. 32, the air bag 109 is sufficiently inflated to obtain a predetermined cuff width W1. However, when the rib 2 and the long palm flexion tendon 4b are present, as shown in the schematic diagram of FIG. 33, the expansion of the air bag 109 is inhibited by the presence of the rib 2 and the long palm flexion tendon 4b. The width W2 is insufficient.
[0013]
Accordingly, an object of the present invention is to provide a wrist sphygmomanometer cuff that can reliably compress an artery located on the wrist without being affected by muscles, tendons, and bones existing on the wrist. It is in.
[0014]
[Means for Solving the Problems]
In the wrist type sphygmomanometer cuff based on the present invention, in order to compress the artery of the wrist, the compression fluid bag to which a predetermined amount of fluid is supplied and the compression fluid bag are attached to the wrist. A cuff for a wrist sphygmomanometer, wherein the compression fluid bag is located between the first inflation bag, the first inflation bag, and the wrist, and the first inflation bag. A second inflatable bag made of a material having higher elasticity than the material constituting the bag.
[0015]
With this configuration, when the fluid is supplied to the compression fluid bag, both the first expansion bag and the second expansion bag are expanded by supplying the fluid. Since the second expansion bag is made of a material having higher elasticity than the material forming the first expansion bag, a predetermined pressure on the wrist side is ensured by the expansion of the first expansion bag. In addition, the second inflatable bag is inflated in close contact with the wrist, and the second inflatable bag wraps around the tendon or the bone flexibly, so that the tendon and the tendon, the tendon and the bone, the bone and the bone It becomes possible for the second inflatable bag to sink in between the two.
[0016]
As a result, regardless of the presence of muscles, tendons and bones in the wrist, the pressure from the first inflation bag is applied to the wrist that is in contact with the second inflation bag, so that the artery in the wrist is sufficiently compressed. Is possible. As a result, the shortage of arterial pressure is resolved and blood pressure can be accurately measured even with a wrist sphygmomanometer.
[0017]
In a preferred form of the invention, the first inflatable bag is inflated mainly toward the wrist when the fluid is supplied, and the fluid is supplied to the second inflatable bag. By doing so, it swells mainly around the tendon or bone of the wrist. In a more preferred embodiment, the material of the second inflatable bag is made of thin film silicon rubber or latex.
[0018]
By providing this feature, as described above, a predetermined pressure on the wrist side is ensured by the expansion of the first expansion bag, and the second expansion bag expands in a state of being in close contact with the wrist, and the second It is possible to reliably realize that the inflatable bag wraps around the muscle, tendon, bone, or the like.
[0019]
Moreover, as a more preferable embodiment of the present invention, the shape of the second inflatable bag on the wrist side is an uneven shape. As described above, by adopting the uneven shape, it becomes possible to obtain high stretchability, and it is possible to reliably realize the wraparound to the muscle, tendon, bone or the like when the second expansion bag is inflated. Become.
[0020]
As a further preferred form of the invention, in the cross section along the wrist axial direction, the width of the second expansion bag is smaller than the width of the first expansion bag. As a result, even when pressurized air is introduced into the first expansion bag and the second expansion bag, the both ends of the first expansion bag expand so as to cover both side portions of the second expansion bag. It is possible to limit the lateral protrusion of the bag. As a result, the second inflatable bag can be inflated toward the wrist side, which is the living body side, and the applied pressure from the first inflatable bag can be sufficiently transmitted to the wrist through the second inflatable bag. Is possible.
[0021]
In the above configuration, preferably, the first expansion bag that protrudes from the second expansion bag is provided with side walls that cover both sides of the second expansion bag. Preferably, the side wall comprises an inflatable bag into which air is introduced. Preferably, the expansion bag is provided such that an internal space is integrated with the first expansion bag.
[0022]
As described above, in the first inflatable bag that protrudes from the second inflatable bag, a side wall of the second inflatable bag is provided at the side portion of the second inflatable bag so as to positively limit the protrusion to the side of the second inflatable bag. Thus, it is possible to reliably limit the protrusion of the second expansion bag to the side. As a result, the second inflation bag can be inflated toward the living body side, and the applied pressure from the first inflation bag can be sufficiently transmitted to the living body via the second inflation bag.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1)
Embodiment 1 of a wrist type sphygmomanometer cuff based on the present invention will be described below with reference to the drawings. The basic structure of the wrist sphygmomanometer using the wrist sphygmomanometer cuff in the present embodiment is the same as that of the conventional wrist sphygmomanometer 100 described with reference to FIG. Is omitted, and only the structure of the cuff for a wrist blood pressure monitor, which is a feature of the present invention, will be described below.
[0024]
First, the configuration of the wrist-type sphygmomanometer cuff and the wrist compression principle based on the present invention will be described with reference to FIGS. 1 is a diagram showing an outline of a cross-sectional structure along the longitudinal direction of the wrist sphygmomanometer cuff 10 according to the present embodiment before being attached to the wrist, and FIG. 2 shows the wrist blood pressure on the wrist 1. FIG. 3 is a cross-sectional view showing a state in which the measuring cuff 10 is worn, FIG. 3 is a cross-sectional view showing a state in which the wrist 1 is being pressed by the wrist type sphygmomanometer cuff 10, and FIG. 3 is a schematic diagram illustrating a wrist pressing principle using a cuff 10. FIG.
[0025]
(Constitution)
First, with reference to FIG. 1, the structure of the wrist-type blood pressure monitor cuff will be described. The wrist type sphygmomanometer cuff 10 stores a first air bag 14A as a first inflating bag and a first air used for storing air sent from a pressurizing pump and compressing an artery in a wrist. A second air bag 16A serving as a second inflatable bag is provided between the bag 14A and the wrist and is made of a material having higher elasticity than the first air bag 14A. Further, a band-like band 11 as an attaching means for attaching the first air bag 14A and the second air bag 16A to the wrist, and a surface fastener for winding and fixing the band 11 around the wrist. 15 is provided. In the state shown in FIG. 1, air is not yet supplied into each air bag.
[0026]
(Wrist compression principle)
Next, the wrist compression principle using the wrist type sphygmomanometer cuff 10 will be described with reference to FIGS. With reference to FIG. 2, the first air bag 14 </ b> A and the second air bag 16 </ b> A are fixed using the band 11 so as to face the radial artery 5 and the ulnar artery 7 of the wrist 1. In addition, since the anatomy of the wrist part 1 is the same as what was demonstrated in FIG. 15, the same reference number is attached | subjected and detailed description is abbreviate | omitted.
[0027]
Next, referring to FIG. 3, the first air bag 14 </ b> A is inflated mainly toward the wrist 1 side when air is supplied, and the second air bag 16 </ b> A is supplied with air. By this, it expands mainly around the tendon or bone of the wrist 1.
[0028]
More specifically, the second air bag 16A wraps around the rib 2 and the long palmar tendon 4b due to the expansion of the second air bag 16A. As a result, the second air bladder 16A enters between the rib 2 and the long palm flexion tendon 4b, and the radial artery 5 is sufficiently compressed by the second air bladder 16A. Further, the second air bag 16A wraps around the superficial digital flexion tendon 6a and the ulna side carpal tendon 6b due to the expansion of the second air bag 16A. As a result, the second air bladder 16A sinks between the superficial digital flexor tendon 6a and the ulnar carpal tendon 6b, and the ulnar artery 7 is sufficiently compressed by the second air bladder 16A.
[0029]
As shown in FIG. 4, when air is supplied to the first air bag 14A and the second air bag 16A, the first air bag 14A and the second air bag 16A are both inflated by the supply of fluid. Since the air bag 16A is made of a material having higher elasticity than the material constituting the first air bag 14A, a predetermined pressure toward the wrist 1 is ensured by the expansion of the first air bag 14A. . In addition, the second air bag 16A is inflated in close contact with the wrist 1 and the second air bag 16A flexibly wraps around the tendon or bone, so that the second air is between the rib 2 and the long palm flexion tendon 4b. Since the bag 16A can sink, the pressure from the first air bag 14A is applied to the wrist portion 1 with which the second air bag 16A contacts, regardless of the presence of the rib 2 and the long palm flexion tendon 4b of the wrist portion 1. It is. The same is true for the second air bag 16A that has entered between the superficial digital flexor tendon 6a and the ulnar carpal tendon 6b. As a result, a sufficient cuff width W3 can be obtained.
[0030]
From the viewpoint of the wrapping of the air bag around the tendon and the bone, it is conceivable that the air bag is composed only of a material having high stretchability. However, if an air bag made of only a material with high stretchability is used, the wrist will be greatly inflated laterally without applying sufficient pressure in the direction in which the wrist is compressed. I can't do it. Therefore, as described above, the combination of the first air bag 14A as the first inflatable bag and the second air bag 16A as the second inflatable bag made of a material having higher elasticity than the first air bag 14A is used. It becomes important.
[0031]
Example 1
Next, a specific structure of the first embodiment based on the compression principle will be described with reference to FIGS. 5 and 6. 5 shows only the air bag of the wrist type sphygmomanometer cuff 10 and shows a contracted state before air is supplied, and FIG. 6 shows an inflated state where air is supplied. . 5 and 6 show cross sections along the wrist axis direction when the wrist-type sphygmomanometer cuff 10 is worn in the wrist circumferential direction.
[0032]
First, referring to FIG. 5, the first air bag 14B as the first inflatable bag is located between the first air bag 14B and the wrist, and is made of a material having higher elasticity than the first air bag 14B. A second air bag 16B as a second inflating bag is provided. As a specific material of the first air bag 14B, vinyl chloride (film thickness of about 0.3 mm) is used. Other materials used for the first air bag 14B include EVA (vinyl acetate; film thickness of about 0.3 mm), urethane (film thickness of about 0.3 mm), and the like.
[0033]
Moreover, in order to promote expansion to the wrist side, a ridge is formed by the side walls 14a and 14b (accordion structure). The thickness of the first air bag 14B when contracted is about 1.2 mm.
[0034]
As a specific material of the second air bag 16B, a thin film silicon rubber, a latex film or the like is used, and the film thickness is about 0.3 mm. Other materials used for the second air bag 16B include vinyl chloride (thickness less than about 0.3 mm), vinyl chloride softer than the first air bag 14B, and the like.
[0035]
The first air bag 14B and the second air bag 16B are provided with air introduction pipes 14c and 16c, respectively, so that the air pressure in the first air bag 14B and the second air bag 16B is the same. A common air introduction tube 17 is connected.
[0036]
In the above configuration, when air is introduced into the first air bag 14B and the second air bag 16B, as shown in FIG. 6, since the first air bag 14B is formed with a heel, the wrist is mainly used. It expands in the direction of pressing the part. On the other hand, the second air bladder 16B expands in all directions. As a result, as described above, it is possible to sufficiently compress the wrist artery.
[0037]
(Example 2)
Next, a specific structure of the second embodiment based on the compression principle will be described with reference to FIGS. FIG. 7 shows only the air bag and shows a state before air is supplied, and FIG. 8 shows a state where air is supplied.
[0038]
First, referring to FIG. 7, the first air bag 14C as the first inflatable bag is located between the first air bag 14C and the wrist, and is made of a material having higher elasticity than the first air bag 14C. A second air bag 16C as a second expansion bag is provided. The specific material and film thickness of the first air bag 14B are the same as in the first embodiment. In addition, in the structure, wrinkles are formed by the side walls 14a and 14b in order to promote expansion to the wrist side. The specific material of the second air bag 16C is the same as that of the first embodiment. However, as a characteristic structure of the present embodiment, the shape of the wrist portion side of the second air bag 16C is an uneven shape 18. Is mentioned.
[0039]
In this way, by adopting the concave and convex shape 18, as shown in FIG. 8, when air is supplied to the first air bag 14C and the second air bag 16C, it is carried out on the wrist side of the second air bag 16C. It becomes possible to obtain a stretchability higher than that of Example 1, and it is possible to surely realize the wrapping around the tendon or the bone when the second air bag 16C is inflated. Further, when the size of the second air bag 16C at the time of expansion may be the same as that of the first embodiment, the size of the second air bag 16C at the time of contraction is smaller than that of the first embodiment. It is also possible to reduce the size of the air bag.
[0040]
9 and 10 are exploded perspective views of specific shapes of the concave-convex shape 18 on the wrist 1 side of the second air bag 16C. 9A and 9B show the first concavo-convex shape 18A, where FIG. 9A is an overall perspective view, FIG. 9B is a cross-sectional view taken along line XX in FIG. 9A, and FIG. FIG. 10 is an overall perspective view showing the second uneven shape 18B on the wrist 1 side of the second air bag 16C.
[0041]
In the concavo-convex shape 18A shown in FIG. 9A, convex portions 18a and concave portions 18b are alternately provided in a wavy shape in the longitudinal direction (see the sectional view of FIG. 9B), and in an expanded state, As shown in 9 (c), the portions corresponding to the convex portions 18a and the concave portions 18b are all outer surfaces and can be greatly expanded. The length of the protrusion 18a is about 30 mm, the width is about 7.5 mm, and the height is about 2 mm.
[0042]
On the other hand, in the concavo-convex shape 18B shown in FIG. 10, block-shaped convex portions 18a are arranged in a matrix, and concave portions 18b are provided in a lattice shape between the convex portions 18a. One protrusion 18a has a size of about 7.5 mm × 7.5 mm and a height of about 2 mm. Even in the case of the concavo-convex shape 18B, as in the case of the concavo-convex shape 18A, the portions corresponding to the convex portions 18a and the concave portions 18b are all outer surfaces during expansion and can be greatly expanded.
[0043]
In Examples 1 and 2, the first air bags 14A, 14B, 14C and the second air are used so that both the radial artery 5 and the ulnar artery 7 of the wrist 1 can be compressed. The case where the bags 16A, 16B, and 16C are provided has been described. “The 11th Japan ME Society Autumn Meeting, Analysis by the Finite Element Method on the Adaptation Position and Size of the Local Compression Cuff in Wrist Blood Pressure Measurement, Ryo Akira In Mr. et al., A method for compressing only the vicinity of the radial styloid process is proposed. However, this document does not disclose or suggest a technique for providing the first air bag and the second air bag.
[0044]
Therefore, the structure shown in each of the above embodiments can be applied to a structure in which only the vicinity of the radial styloid process is pressed. FIG. 11 shows a wrist type sphygmomanometer cuff 10 configured to compress only the vicinity of the radial styloid process. Also in this case, the first air bag 14A is inflated to ensure a predetermined pressure toward the wrist 1 and the second air bag 16A is inflated in close contact with the wrist 1 so that the second air bag 16A is inflated. By flexing around the tendon or bone etc., the second air bag 16A can enter between the radius 2 and the long palm flexion tendon 4b, and the radial artery 5 can be sufficiently compressed.
[0045]
(Embodiment 2)
As described above, in the wrist type blood pressure monitor cuff using the first air bag and the second air bag, the following problems may occur. This point will be described with reference to FIGS. 12 and 13 show a cross section along the wrist axis direction (Y1 direction in FIG. 20) when the wrist type sphygmomanometer cuff is worn in the wrist circumferential direction (X1 direction in FIG. 20). .
[0046]
For example, as shown in the schematic diagram of FIG. 12, as a result of the second air bag 16A being formed of a member that is more flexible than the first air bag 14A, the side region of the second air bag 16A is the first air bag 14A. It is conceivable that the bulge bulges away in the lateral direction (in the direction of the arrow in the figure) where there is little pressure from.
[0047]
As shown in FIG. 12, the second air bag 16A is expanded in the lateral direction in many cases as shown in FIG. 13, rather than when the second air bag 16A protrudes from both sides of the first air bag 14A. As shown, the pressure balance of the first air bag 14A is biased, the second air bag 16A protrudes to one side, and the first air bag 14A protrudes to the opposite side of the second air bag 16A. As a result, it is considered that the applied pressure from the first air bag 14A is not sufficiently transmitted to the surface of the living body via the second air bag 16A, and the entire wrist and the radial artery 5 and the like cannot be sufficiently compressed. In particular, when the palm is moved to the front or back and the angle of the wrist is changed, the protrusion of the second air bag 16A appears prominently.
[0048]
Therefore, in the second embodiment, the shapes of the first air bag 14A and the second air bag 16A are improved so as not to cause such a problem. The shapes of the first air bag 14A and the second air bag 16A will be described below with reference to FIGS. 14 to 19 also show cross sections along the wrist axial direction when the wrist type sphygmomanometer cuff is mounted in the wrist circumferential direction, similarly to FIGS. 12 and 13. FIG. 20 is a plan view showing the shapes of the first air bag 14A and the second air bag 16A as viewed from the wrist side.
[0049]
First, in the structure shown in FIG. 14, the width (L2) of the second air bladder 16C is provided to be smaller than the width (L1) of the first air bladder 14B. Further, as a preferred form, the exposed dimension (L3) of the first air bag 14B on both sides of the second air bag 16C is equal so that the mounting position of the second air bag 16C is the center position of the first air bag 14B. It is provided to become.
[0050]
By adopting this configuration, as shown in the schematic diagram of FIG. 15, even when pressurized air is introduced into the first air bag 14B and the second air bag 16C, both end portions of the first air bag 14B (see FIG. In the area surrounded by the middle X), the air bag expands so as to cover both side portions of the second air bag 16C, so that the protrusion of the second air bag 16C to the side can be restricted. As a result, the second air bag 16C can be inflated toward the living body side wrist 1 side, and the applied pressure from the first air bag 14B can be sufficiently passed through the second air bag 16C. It becomes possible to tell to 1.
[0051]
Another preferred form is shown in FIG. A first air bag 14D shown in FIG. 16 is provided with a side air bag 14g at the position of the side of the second air bag 16C. The side air bag 14g is provided so that the first air bag 14D and the internal space form an integral air bag. When air is introduced into the first air bag 14D, the side air bag 14g Inflate. Therefore, the side air bag 14g is formed from the same material as the first air bag 14D.
[0052]
Thus, in the 1st air bag 14D which protrudes from the 2nd air bag 16C, the protrusion to the side of the 2nd air bag 16C is actively restrict | limited to the position of the side part of the 2nd air bag 16C, The protrusion prevention By providing the side wall, as shown in FIG. 17, it is possible to reliably limit the protrusion of the second air bag 16 </ b> C to the side. As a result, the second air bag 16C can be inflated toward the living body, and the applied pressure from the first air bag 14B can be sufficiently transmitted to the living body via the second air bag 16C. . Further, since the applied pressure to the living body is also transmitted by the expansion of the side air bag 14g, it is possible to compress in a sufficiently wide area.
[0053]
In addition to the side air bag 14g, the side air bag 16C is provided with a protrusion preventing side wall that actively restricts the side protrusion of the second air bag 16C to the side. As shown in FIG. 18, the third air bag 14E independent from the first air bag 14B and the second air bag 16C is provided on both sides of the second air bag 16C, and the first air bag 14B and the second air bag are provided. A configuration can be adopted in which air is introduced into the third air bag 14E through the air introduction tube 14f by the air introduction tube 17 that introduces air into the bag 16C. The material of the third air bag 14E is preferably a material harder than the second air bag 16C, such as the same material as the first air bag 14D.
[0054]
As still another form, as shown in FIG. 19, the urethane and other members that do not affect the contact with the living body while maintaining a relatively predetermined shape on both sides of the second air bag 16C in advance. Also by providing the auxiliary side wall 14F, the same operational effects as those of the side air bag 14g shown in FIG. 16 and the third air bag 14E shown in FIG. 18 can be obtained.
[0055]
In the configuration shown in the second embodiment described above, typically, as shown in FIG. 20, the second air in each axial direction in the wrist axial direction (Y1) and the wrist circumferential direction (X1). The width of the bag 16C is provided to be smaller than the width of the first air bag 14B.
[0056]
Further, as another form, the pressure reduction on the side portion in the direction along the wrist circumferential direction is smaller than the pressure reduction due to the protrusion on the side side in the wrist axial direction, As shown in FIGS. 21 to 23, it is possible to adopt a structure in which the second air bag 16C protrudes beyond the first air bags 14B and 14D on the side portion side in the wrist circumferential direction (X1). It is. The structure shown in FIG. 23 is a structure in the case where the wrist circumferential direction (X1) is shortened and the wrist is locally compressed, but even in such a case, the wrist Since the second air bag 16 protrudes due to movement, a structure in which at least the second air bag 16C protrudes from the first air bags 14B and 14D is important.
[0057]
Further, by providing the second air bag 16C so as to protrude beyond the first air bags 14B and 14D in the wrist circumferential direction (X1), the end portion of the second air bag 16C is directly attached as shown in FIG. Since it becomes possible to fix to the belt 11 which is a fixing tool, joining between the 2nd air bag 16C and the 1st air bags 14B and 14D becomes unnecessary, and improvement of productivity and improvement of maintenance are aimed at. Is possible.
[0058]
In addition, as shown in FIG. 25, the first air bag 14 </ b> B may be fixed to the second air bag 16 </ b> C by providing both end portions of the second air bag 16 </ b> C around the end portion of the first air bag 14 </ b> B. It becomes possible.
[0059]
Furthermore, as shown in FIG. 26, the region surrounded by R2 has a structure in which the second air bag 16C does not protrude from the first air bags 14B and 14D, but the air introduction tube 17 is connected to this structure. (Especially, when the bag width (Y1 direction) between the first air bags 14B and 14D and the second air bag 16C is small), the swelling of the first air bags 14B and 14D is the same as that of the first air bags 14B and 14D. In the structure where the second air bag 16C protrudes from the first air bags 14B and 14D, as shown in the region surrounded by R1, the problem of being hindered by the air introduction tube 17 in the difference between the two air bags 16C occurs. When the air introduction tube 17 is connected, it is possible to obtain an advantage that the bulging of the first air bags 14B and 14D is not hindered by the air introduction tube 17. In FIG. 26, the structures shown in the regions R1 and R2 are shown on the same drawing for convenience, but the structure having both the structures shown in the regions R1 and R2 is not disclosed.
[0060]
It is also possible to employ the uneven air bag structure shown in FIGS. 9 and 10 in the structure shown in the second embodiment.
[0061]
In each of the above embodiments, the case where air is used as the fluid is described. However, the present invention is not limited to air, and other gases having similar properties (oxygen, carbon dioxide, helium, etc.) are used. It is also possible to use not only gas but also water or other liquids.When liquid is used, it is necessary to adopt a confidential structure in the fluid path so that liquid leakage does not occur. It is necessary to.
[0062]
Accordingly, the above-described embodiment disclosed herein is illustrative in all respects and does not serve as a basis for limited interpretation. Therefore, the technical scope of the present invention is not interpreted only by the above-described embodiments, but is defined based on the description of the scope of claims. Moreover, all the changes within the meaning and range equivalent to a claim are included.
[0063]
【The invention's effect】
According to the wrist type sphygmomanometer cuff based on the present invention, the pressure from the first inflation bag is applied to the wrist part in contact with the second inflation bag regardless of the presence of tendons and bones on the wrist part. It becomes possible to sufficiently compress the artery of the wrist. As a result, the shortage of arterial pressure is resolved and blood pressure can be accurately measured even with a wrist sphygmomanometer.
[Brief description of the drawings]
FIG. 1 is a diagram showing an outline of a cross-sectional structure along a longitudinal direction of a wrist type sphygmomanometer cuff 10 according to an embodiment of the present invention before attachment to a wrist.
2 is a cross-sectional view showing a state in which a wrist sphygmomanometer cuff 10 is attached to the wrist 1. FIG.
FIG. 3 is a cross-sectional view showing a state in which the wrist portion 1 is being pressed by the wrist type sphygmomanometer cuff 10;
FIG. 4 is a schematic diagram showing a wrist compression principle using a wrist type sphygmomanometer cuff 10;
FIG. 5 is a cross-sectional view showing the structure of the first air bag 14B and the second air bag 16B when contracted in the first embodiment.
6 is a cross-sectional view showing the structure of the first air bag 14B and the second air bag 16B when inflated in Embodiment 1. FIG.
7 is a cross-sectional view showing the structure of the first air bag 14C and the second air bag 16C when contracted in Embodiment 2. FIG.
8 is a cross-sectional view showing the structure of the first air bag 14C and the second air bag 16C when inflated in Example 2. FIG.
9A is an overall perspective view showing a first uneven shape on the wrist 1 side of the second air bag 16C, FIG. 9B is a cross-sectional view taken along line X-X, and FIG. 9C is a cross-sectional view when expanded; It is.
FIG. 10 is an overall perspective view showing a second uneven shape on the wrist part 1 side of the second air bag 16C.
FIG. 11 is a cross-sectional view when the wrist-type sphygmomanometer cuff 10 is applied to a structure that compresses only the vicinity of the radial styloid process.
12 is a first cross-sectional view showing a problem of the wrist sphygmomanometer cuff 10 according to the first embodiment. FIG.
FIG. 13 is a second cross-sectional view showing a problem of the wrist sphygmomanometer cuff 10 according to the first embodiment.
FIG. 14 is a cross-sectional view showing a structure of a wrist sphygmomanometer cuff according to a second embodiment.
FIG. 15 is a first cross-sectional view showing the function and effect of the wrist sphygmomanometer cuff according to the second embodiment.
FIG. 16 is a cross-sectional view showing another structure of the wrist type sphygmomanometer cuff according to the second embodiment.
FIG. 17 is a second cross-sectional view showing the function and effect of the wrist sphygmomanometer cuff according to the second embodiment.
FIG. 18 is a cross-sectional view showing still another structure of the cuff for wrist blood pressure monitor according to the second embodiment.
FIG. 19 is a cross-sectional view showing still another structure of the wrist sphygmomanometer cuff according to the second embodiment.
FIG. 20 is a diagram showing a typical arrangement relationship between the first air bags 14B and 14D and the second air bag 16C.
FIG. 21 is a first diagram showing another arrangement relationship between the first air bags 14B and 14D and the second air bag 16C.
FIG. 22 is a second diagram showing another arrangement relationship between the first air bags 14B and 14D and the second air bag 16C.
FIG. 23 is a third view showing another arrangement relationship between the first air bags 14B and 14D and the second air bag 16C.
FIG. 24 is a first cross-sectional view showing the effect of another arrangement relationship between the first air bags 14B and 14D and the second air bag 16C.
FIG. 25 is a second cross-sectional view showing an effect in another arrangement relationship between the first air bags 14B and 14D and the second air bag 16C.
FIG. 26 is a third cross-sectional view showing an effect in another arrangement relationship between the first air bags 14B and 14D and the second air bag 16C.
27 is an overall perspective view showing the structure of a conventional wrist blood pressure monitor 100. FIG.
28 is a block diagram showing an internal configuration of a conventional wrist blood pressure monitor 100. FIG.
FIG. 29 is a cross-sectional structure view along the longitudinal direction of the wrist type sphygmomanometer cuff 102 before being attached to the wrist.
30 is a cross-sectional view at the time of contraction showing a state in which the wrist sphygmomanometer cuff 102 is attached to the wrist portion 1. FIG.
FIG. 31 is a cross-sectional view when inflated showing a state in which the wrist-type sphygmomanometer cuff 102 is attached to the wrist 1.
FIG. 32 is a schematic diagram of an ideal state of wrist compression using a wrist sphygmomanometer cuff.
FIG. 33 is a schematic view showing a problem of wrist compression using a wrist blood pressure monitor cuff.
[Explanation of symbols]
1 wrist part, 2 radius, 3 ulna, 4a deep digital flexion tendon, 4b long palm flexion tendon, 5 radial artery, 6a superficial digital flexion tendon, 6b ulnar side carpal tendon, 7 ulnar artery, 10 wrist cuff for blood pressure monitor, 14A, 14B, 14C, 14D 1st air bag, 14g Side air bag, 14E 3rd air bag, 14F Auxiliary side wall, 16A, 16B, 16C 2nd air bag, 18, 18A, 18B Concave shape, 18a Convex part, 18b Concave part 14a, 14b Side wall, 14c, 14f, 16c Air introduction tube, 17 Air introduction tube, 100 Wrist blood pressure monitor, 101 Main body, 103 Display, 104 Measurement start switch, 105 Pressure sensor, 106 Pressure pump, 107 Exhaust valve, 108 CPU.

Claims (4)

A wrist sphygmomanometer cuff comprising: a compression fluid bag to which a predetermined amount of fluid is supplied in order to compress an artery in the wrist; and an attachment means for attaching the compression fluid bag to the wrist. There,
The compression fluid bag is:
A first expansion bag located between the first expansion bag and the wrist portion, have a second expansion bag made of a material having high elasticity than the material constituting the first inflation bag,
In the cross section along the wrist axial direction, the width of the second expansion bag is provided smaller than the width of the first expansion bag,
A wrist sphygmomanometer cuff in which at least one side portion of the second inflatable bag is provided longer than a side portion of the first inflatable bag in a cross-section along the wrist circumferential direction . The wrist sphygmomanometer cuff according to claim 1 , wherein a side wall covering both sides of the second expansion bag is provided on the first expansion bag that protrudes from the second expansion bag in a cross section along the wrist axial direction. . The wrist sphygmomanometer cuff according to claim 2 , wherein the side wall is composed of an inflatable bag into which air is introduced . The inflation bladder is provided so that the internal space becomes the first expansion bag integral with a wrist-type blood pressure monitor cuff according to claim 3.

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