JP2009284967A - Cuff for blood pressure data measuring instrument and blood pressure data measuring instrument equipped with it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cuff for a blood pressure data measuring instrument oppressing the artery being a measuring target with high efficiency and relaxing the pain given to an examinee without being affected by a tendon or a bone. <P>SOLUTION: The cuff 10 is equipped with an oppressing air bag 50, a restriction member 40, a pressing air bag 30 and outer cloth 20. The oppressing air bag 50 is arranged on the surface of a wrist 200 in order to oppress the radial artery 212, and the restriction member 40 is positioned outside the oppressing air bag 50 to restrict the expansion toward the outside of the oppressing air bag 50. The pressing air bag 30 is positioned outside the restriction member 40 to press the restriction member 40 toward the wrist 200, and the outer cloth 20 is positioned outside the pressing air bag 30 to restrict the expansion toward the outside of the pressing air bag 30, and thereby fixing the oppressing air bag 50, the restriction member 40 and the pressing air bag 30 to the wrist 200. The restriction member 40 has pressing parts 45a and 45b for pressing the bio-tissue in the vicinity of the part where the radial artery 212 is positioned toward the radial artery 212. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cuff for a blood pressure information measuring device and a blood pressure information measuring device provided with the same, and more specifically, a cuff for a blood pressure information measuring device used by being worn on a wrist, and a blood pressure information measuring device provided with the same. About.

  Obtaining the blood pressure information of the subject is very important for knowing the health condition of the subject. In recent years, the present invention is not limited to acquiring systolic blood pressure values, diastolic blood pressure values, etc., which have been widely recognized as useful indicators of health management, but by acquiring a subject's pulse wave, Attempts have been made to capture changes in the load and arterial stiffness. The blood pressure information measuring device is a device for obtaining indexes for health management based on the acquired blood pressure information, and is expected to be further utilized in the fields of early detection, prevention, treatment, etc. of cardiovascular diseases. Yes. The blood pressure information described above includes a wide variety of information on the circulatory system such as systolic blood pressure value, diastolic blood pressure value, average blood pressure value, pulse wave, pulse, and AI (Augmentation Index) value.

  In general, for measuring blood pressure information, a cuff for a blood pressure information measuring device (hereinafter also simply referred to as a cuff) containing a fluid bag is used. Here, the cuff means a band-shaped structure having a lumen and can be wound around a part of a living body, and a fluid bag is formed by injecting a fluid such as gas or liquid into the lumen. It refers to what is used to measure blood pressure information after being inflated and deflated. For example, in a blood pressure information measuring device (hereinafter also simply referred to as a sphygmomanometer) for measuring a blood pressure value such as a systolic blood pressure value or a diastolic blood pressure value, a living body is provided with a cuff that contains a fluid bag for compressing an artery. The blood pressure value is measured by winding the wound fluid bag on the body surface and expanding / contracting the wound fluid bag to capture the arterial pressure pulse wave as a change in the internal pressure of the fluid bag. In particular, the cuff used by being wound around the arm is also called an armband or a manchette.

  Examples of cuffs that are wound around the wrist include those disclosed in Japanese Patent Application Laid-Open No. 61-11019 (Patent Document 1) and those disclosed in Japanese Patent Application Laid-Open No. 1-265941 (Patent Document 2). . In the cuff disclosed in Patent Document 1, either a living tissue in the vicinity of the radial artery or a living tissue in the vicinity of the ulnar artery that extends into the wrist is locally compressed by the air bag included in the cuff. In the cuff disclosed in Patent Document 2, the air bag in which the living tissue in the vicinity of the radial artery and the living tissue in the vicinity of the ulnar artery extending into the wrist are provided independently. It is comprised so that each may be compressed locally.

  However, when the cuff having the configuration disclosed in Patent Document 1 is used, the artery to be measured escapes under the tendon during the compression with the air bag, and the compression force on the artery is inhibited by the tendon. There is a problem that the measurement accuracy is lowered due to the sufficient amount. On the other hand, when the cuff having the configuration disclosed in Patent Document 2 is used, it is possible to prevent the artery from escaping under the tendon by simultaneously compressing the radial artery and the ulnar artery. In order to prevent this, it is necessary to compress the artery that is not the subject of measurement with a very strong compression force, which may cause pain to the subject, or more of the wrist Since it is the structure which compresses a part with an air bag, the compression force by an air bag may be inhibited with the rib or the ulna. In addition, when the cuff having the configuration disclosed in Patent Documents 1 and 2 is used, the air bag inflates in any case, and there is a problem that the compression efficiency on the artery is not sufficiently high. It was.

  In addition, as a cuff used by being wound around a wrist, there is one disclosed in, for example, Japanese Patent Application Laid-Open No. 11-309119 (Patent Document 3), which is intended to increase the compression efficiency of an air bag against an artery. In the cuff disclosed in Patent Document 3, a relatively rigid interposition member is disposed outside a compression air bag that locally compresses only the artery to be measured, and is further pressed to the outside of the interposition member. By disposing the air bag and configuring the interposition member to be pressed toward the wrist by the pressing air bag, and by configuring the inflating direction of the compression air bag by the interposition member, Improvement of compression efficiency for arteries is attempted.

However, even when the cuff having the configuration disclosed in Patent Document 3 is used, the artery to be measured escapes under the tendon during the compression by the compression air bag, and the compression force on the artery is inhibited by the tendon. As a result, the measurement accuracy is lowered.
JP 61-11019 A Japanese Patent Laid-Open No. 1-265941 Japanese Patent Laid-Open No. 11-309119

  As described above, when the cuff is configured as disclosed in the above Patent Documents 1 to 3, there is a problem that the artery to be measured cannot be sufficiently compressed due to the influence of tendons and bones, or the artery Even if it was able to be pressed, there was a problem that it caused pain to the subject, and it could not be said that the compression efficiency was necessarily high.

  Therefore, the present invention has been made to solve these problems, and it is possible to compress the artery to be measured with high efficiency without being affected by tendons and bones, and to reduce the pain given to the subject. It is an object of the present invention to provide a blood pressure information measuring device cuff and a blood pressure information measuring device including the same.

  A blood pressure information measuring device cuff according to the present invention is used by being wound around a wrist to measure blood pressure information, and includes a compression fluid bag, a restricting member, a pressing fluid bag, and a fixing member. And. In order to compress the artery extending through the wrist, the compression fluid bag is disposed on the wrist surface where the artery is located in the wearing state. The restricting member is located on the opposite side to the wrist side in the mounted state as viewed from the compression fluid bag, and restricts the compression fluid bag from expanding toward the opposite side to the wrist side. The pressing fluid bag is positioned on the side opposite to the wrist side in the mounted state when viewed from the limiting member, and presses the limiting member toward the wrist side. The fixing member is located on the side opposite to the wrist side in the mounted state as viewed from the pressing fluid bag, restricts the pressing fluid bag from expanding toward the side opposite to the wrist side, and The compression fluid bag, the restriction member, and the pressing fluid bag are fixed to the wrist. The restricting member has a pressing portion that presses the living tissue in the vicinity of the portion where the artery is located toward the artery in the mounted state.

  With this configuration, when the blood pressure information measurement device cuff is attached to the wrist and the blood pressure value is measured, the living tissue in the vicinity of the artery to be measured is placed on the artery side by the pressing portion provided on the restriction member. The arteries will not escape under the tendon. Further, at the time of measurement, the artery to be measured is more evenly compressed in the circumferential direction by the pressing portion and the compression fluid bag, and the compression fluid bag is directed outward by the restriction member. Since the expansion is prevented, the compression efficiency of the artery by the compression fluid bag is also greatly improved. Furthermore, the position of the wrist to be compressed with the compression fluid bag is also local, and the wrist is not compressed more than necessary. Therefore, with the above configuration, a blood pressure information measuring device cuff capable of compressing an artery to be measured with high efficiency without being affected by tendons and bones and reducing pain given to the subject is obtained. be able to.

  In the cuff for a blood pressure information measurement device according to the present invention, it is preferable that the restricting member has an accommodating space in which the compression fluid bag is accommodated. It is preferable that the restricting member is provided at a position sandwiching the accommodation space along the circumferential direction of the wrist in the mounted state.

  By configuring in this way, the living tissue in the vicinity of the artery to be measured is pressed toward the artery side from both sides by the pressing portion provided at a position where the compression fluid bag accommodated in the accommodation space is sandwiched. Thus, it is possible to reliably prevent the artery from escaping under the tendon. Further, at the time of measurement, the pair of pressing portions and the compressing fluid bag can compress the artery to be measured more evenly in the circumferential direction.

  In the cuff for a blood pressure information measuring device according to the present invention, it is preferable that the restricting member is constituted by a flexible member.

  By configuring in this way, at the time of measurement, the restricting member is bent by being pressed by the pressing fluid bag, so that the living tissue in the vicinity of the artery to be measured is more reliably moved to the artery side by the pressing portion. It comes to be pressed toward.

  In the cuff for a blood pressure information measurement device according to the present invention, it is preferable that the surface of the restricting member on the pressing fluid bag side is gently curved.

  By configuring in this way, the pressing fluid bag does not expand due to distortion during measurement, and the pressing of the pressing fluid bag against the restricting member becomes uniform in the circumferential direction. Accordingly, the pressing force applied to the restriction member by the pressing fluid bag is applied to the restriction member without waste, and the living tissue in the vicinity of the artery to be measured is more reliably and efficiently directed toward the artery by the pressing portion. It comes to be pressed.

  In the cuff for a blood pressure information measuring device according to the present invention, the length of the pressing fluid bag in the direction along the circumferential direction of the wrist in the mounted state is the length of the wrist in the mounted state of the compression fluid bag. It is preferably longer than the length in the direction along the circumferential direction.

  With this configuration, the restricting member is pressed over a wider range by the pressing fluid bag, and the living tissue near the artery to be measured is more reliably pressed toward the artery by the pressing portion. Will come to be.

  In the cuff for a blood pressure information measuring device according to the present invention, the restricting member is located at a position facing the wrist surface in a portion where an artery different from the artery compressed by the compression fluid bag is located in the mounted state. It is preferable to have an avoidance space that avoids compression of the artery.

  By configuring in this way, it is possible to prevent compression of an artery different from the artery compressed by the compression fluid bag at the time of measurement, thereby preventing wrist congestion due to compression of both arteries. It becomes possible to prevent. Therefore, by adopting the above configuration, the subject will not be more painful than necessary.

  In the cuff for a blood pressure information measuring device according to the present invention, the compression fluid bag may have ridges at both ends in the direction along the circumferential direction of the wrist in the mounted state.

  With this configuration, the compression fluid bag is suppressed from expanding in a balloon shape during measurement, and the wrist surface is more evenly compressed in the circumferential direction by the compression fluid bag. Therefore, the artery to be measured can be compressed with the compression fluid bag with higher efficiency.

  A blood pressure information measurement device according to the first aspect of the present invention includes any one of the above-described cuffs for a blood pressure information measurement device, an expansion / contraction mechanism for expanding and contracting the compression fluid bag, and a pressure in the compression fluid bag. And a blood pressure value calculation unit that calculates a blood pressure value based on pressure information detected by the pressure detection unit.

  By comprising in this way, the blood pressure information measuring device cuff capable of compressing the artery to be measured with high efficiency without being affected by tendons and bones and reducing pain given to the subject is provided. Since it can be set as a blood pressure information measuring device, it can be set as the blood pressure information measuring device which can measure a blood pressure value with high precision, without giving a subject more pain than necessary.

  In the cuff for a blood pressure information measurement device according to the present invention, the cuff for the blood pressure information measurement device includes a light emitting unit that irradiates light toward a portion where the artery is located and a living tissue in the vicinity thereof in the attached state, A photoelectric sensor that outputs an output signal corresponding to the amount of received light, further including a light receiving unit that receives light that has passed through a portion of the artery located in association with light irradiation and a living tissue in the vicinity thereof; May be.

  With this configuration, when the volume pulse wave is measured by attaching the cuff for the blood pressure information measurement device to the wrist, the living tissue in the vicinity of the artery to be measured is measured by the pressing portion provided on the restriction member. And the artery will not escape under the tendon. Further, at the time of measurement, the artery to be measured is more evenly compressed in the circumferential direction by the pressing portion and the compression fluid bag, and the compression fluid bag is directed outward by the restriction member. Since the expansion is prevented, the compression efficiency of the artery by the compression fluid bag is also greatly improved. Furthermore, the position of the wrist to be compressed with the compression fluid bag is also local, and the wrist is not compressed more than necessary. Therefore, with the above configuration, a blood pressure information measuring device cuff capable of compressing an artery to be measured with high efficiency without being affected by tendons and bones and reducing pain given to the subject is obtained. be able to.

  A blood pressure information measuring device according to a second aspect of the present invention receives light based on the above-described cuff for blood pressure information measuring device, a drive unit for causing the light emitting unit to emit light, and an output signal output from the photoelectric sensor. A light reception amount detection unit that detects a change in the amount; and a volume pulse wave acquisition unit that acquires a volume pulse wave based on information obtained by the light reception amount detection unit.

  By comprising in this way, the blood pressure information measuring device cuff capable of compressing the artery to be measured with high efficiency without being affected by tendons and bones and reducing pain given to the subject is provided. Since the blood pressure information measuring device can be used, the blood pressure information measuring device can measure the volume pulse wave with higher accuracy without causing the subject more pain than necessary.

  According to the present invention, there is provided a cuff for a blood pressure information measurement device capable of compressing an artery as a measurement target with high efficiency without being affected by tendons and bones, and reducing pain given to a subject, and the same. It can be set as a blood pressure information measuring device.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the same or similar parts are denoted by the same reference numerals in the drawings, and description thereof will not be repeated.

(Embodiment 1)
In the blood pressure information measuring device according to the first embodiment of the present invention described below, the radial artery extending through the wrist is compressed using an air bag contained in the cuff, and the variation in the internal pressure of the radial artery is detected. This is a so-called wrist-type sphygmomanometer that measures blood pressure values such as systolic blood pressure value and diastolic blood pressure value based on this.

  FIG. 1 is a perspective view showing an external structure of a sphygmomanometer according to Embodiment 1 of the present invention. FIG. 2 is a block diagram showing a functional block configuration of the sphygmomanometer shown in FIG. First, the configuration of the sphygmomanometer in the present embodiment will be described with reference to FIG. 1 and FIG.

  As shown in FIG. 1, a sphygmomanometer 100 </ b> A according to the present embodiment includes a main body 110 and a cuff 10. The main body 110 has a box-shaped casing, and has a display unit 160 and an operation unit 190 on the upper surface of the casing. The surface of the cuff 10 is covered with a bag-like exterior cover, and has a belt-like shape that can be wound around the wrist. In sphygmomanometer 100A in the present embodiment, main body 110 is attached to a predetermined position on the outer peripheral surface of cuff 10 from the viewpoint of miniaturization and improvement in handling.

  As shown in FIG. 2, the main body 110 includes a CPU (Central Processor Unit) 130, a memory unit 170, and a power supply unit 180 in addition to the display unit 160 and the operation unit 190 described above. The CPU 130 is a control means for controlling the entire blood pressure monitor 100A by centrally controlling and monitoring each part of the blood pressure monitor 100A. The memory unit 170 is configured by a ROM (Read-Only Memory) or a RAM (Random-Access Memory), and stores a program for causing the CPU 130 or the like to execute a processing procedure for measuring a blood pressure value, It is a means for recording measurement results and the like. The display unit 160 is configured by, for example, an LCD (Liquid Crystal Display) or the like, and is a means for displaying measurement results and the like. The operation unit 190 is a means for accepting an operation by a subject or the like and inputting an external command to the CPU 130 or the power supply unit 180. The power supply unit 180 is means for supplying power as a power source to the CPU 130.

  The CPU 130 also functions as a blood pressure value calculation unit, and calculates blood pressure values such as a systolic blood pressure value and a diastolic blood pressure value based on a signal input from an oscillation circuit 147 described later. The CPU 130 inputs a blood pressure value as a measurement result to the memory unit 170 or the display unit 160.

  The main body 110 includes a pair of air components 140 and 150 and various circuits associated therewith. The pair of air components 140 and 150 are provided corresponding to the compression air bag 50 and the pressing air bag 30 described later, respectively, and include a pressurizing pump, an exhaust valve, and a pressure sensor.

  The air system component 140 for pressurizing and depressurizing the compression air bladder 50 includes a pressurizing pump 141, an exhaust valve 142, and a pressure sensor 143. The pressurization pump 141, the exhaust valve 142, and the pressure sensor 143 are each connected to a compression air bag 50 described later via an air pipe 81. The main body 110 is provided with a pressurization pump drive circuit 145, an exhaust valve drive circuit 146, and an oscillation circuit 147 in accordance with the pressurization pump 141, the exhaust valve 142, and the pressure sensor 143, respectively.

  The pressurizing pump 141 is a pressurizing unit for inflating the compressing air bladder 50 by sending air into the compressing air bladder 50. The pressurization pump drive circuit 145 controls the operation of the pressurization pump 141 based on a control signal input from the CPU 130. The exhaust valve 142 is a decompression means for exhausting air from the space inside the compression air bag 50 to the outside in the open state to contract the compression air bag 50, and the internal pressure of the compression air bag 50 in the closed state. It is also a pressure maintaining means for maintaining the pressure. The exhaust valve drive circuit 146 controls the opening / closing operation of the exhaust valve 142 based on a control signal input from the CPU 130. The pressurization pump 141 and the exhaust valve 142 correspond to an expansion / contraction mechanism that adjusts the internal pressure of the compression air bladder 50.

  The pressure sensor 143 corresponds to a pressure detection unit that detects the internal pressure of the compression air bladder 50, and outputs an output signal corresponding to the internal pressure of the compression air bladder 50 toward the oscillation circuit 147. The oscillation circuit 147 generates a signal having an oscillation frequency corresponding to the signal input from the pressure sensor 143, and outputs the generated signal to the CPU 130.

  The air system component 150 for pressurizing and depressurizing the pressing air bag 30 includes a pressurizing pump 151, an exhaust valve 152, and a pressure sensor 153. The pressurization pump 151, the exhaust valve 152, and the pressure sensor 153 are each connected to a pressing air bag 30 described later via an air pipe 82. The main body 110 is provided with a pressurization pump drive circuit 155, an exhaust valve drive circuit 156, and an oscillation circuit 157 according to the pressurization pump 151, the exhaust valve 152, and the pressure sensor 153, respectively.

  The pressurizing pump 151 is a pressurizing unit for inflating the pressing air bag 30 by sending air into the pressing air bag 30. The pressurization pump drive circuit 155 controls the operation of the pressurization pump 151 based on a control signal input from the CPU 130. The exhaust valve 152 is a decompression means for exhausting air from the space inside the pressing air bag 30 to the outside in the open state to contract the pressing air bag 30, and the internal pressure of the pressing air bag 30 in the closed state. It is also a pressure maintaining means for maintaining the pressure. The exhaust valve drive circuit 156 controls the opening / closing operation of the exhaust valve 152 based on a control signal input from the CPU 130. The pressurizing pump 151 and the exhaust valve 152 correspond to an expansion / contraction mechanism that adjusts the internal pressure of the pressing air bladder 30.

  The pressure sensor 153 corresponds to a pressure detection unit that detects the internal pressure of the pressing air bladder 30, and outputs an output signal corresponding to the internal pressure of the pressing air bladder 30 to the oscillation circuit 157. The oscillation circuit 157 generates an oscillation frequency signal corresponding to the signal input from the pressure sensor 153 and outputs the generated signal to the CPU 130.

  As shown in FIG. 2, the cuff 10 includes a pressing air bag 50 as a pressing fluid bag and a pressing air bag 30 as a pressing fluid bag. The pressing air bag 50 and the pressing air bag 30 are accommodated in the exterior cover described above. Each of the compression air bag 50 and the pressing air bag 30 is connected to the air system components 140 and 150 via the air pipes 81 and 82, respectively.

  FIG. 3 is a cross-sectional view showing a state where the cuff shown in FIG. 1 is attached to the wrist. Next, with reference to FIG. 3, the structure of the cuff of the sphygmomanometer in the present embodiment will be described in detail. The wrist cross section shown in FIG. 3 is the one when the wrist of the left hand is viewed from the central side toward the distal side, and the state shown in FIG. 3 shows that both the compression fluid bag and the pressure fluid bag are inflated. It is a figure which shows the measured state. Moreover, in FIG. 3, the illustration of the inner cloth which will be located in the wrist side in the mounting | wearing state among the exterior covers which cover the surface of a cuff is abbreviate | omitted.

  As shown in FIG. 3, the radius 210 and the ulna 220 are located inside the wrist 200, and the radial artery 212, the ulnar artery 222, and the tendon 230 are located in the surface layer portion of the wrist 200. The tendon 230 is located between the radial artery 212 and the ulnar artery 222. The cuff 10 in the present embodiment is used by being wound around the wrist 200 including these biological tissues, and measures the blood pressure value by selectively pressing the radial artery 212 of the two arteries. .

  As shown in FIG. 3, the cuff 10 includes a restricting member 40 in addition to the compression air bag 50 and the pressing air bag 30 described above. Further, the compression air bag 50, the pressing air bag 30, and the limiting member 40 are all included in the exterior cover. The outer cover overlaps the inner cloth that will be in contact with the surface of the wrist 200 in the attached state and the outer cloth 20 that will be positioned on the outermost side in the attached state, and joins the periphery thereof (for example, stitching or welding). ), And has one end 21 and the other end 22 in the longitudinal direction. A hook-and-loop fastener is provided at a predetermined position of the portion near the one end 21 and the portion near the other end 22 of the bag-shaped cover, and the portion near the one end 21 and the portion near the other end 22 are the wrist 200. The cuff 10 is wound around and fixed to the wrist 200 by being overlapped on the surface and engaging the surface fastener.

  In order to compress the radial artery 212 extending through the wrist 200, the compression air bag 50 is disposed on the surface of the wrist 200 where the radial artery 212 is located in the wearing state. The width (the length in the direction along the circumferential direction of the wrist 200 in the mounted state) is adjusted so that only the living tissue in the vicinity of the radial artery 212 can be compressed locally. The width is preferably about 10 mm to 30 mm in the contracted state.

  The compression air bag 50 is preferably formed of a bag-like member formed using a resin sheet. As the compression air bag 50, for example, a bag formed by overlapping two resin sheets and welding the peripheral edges thereof is used. The space inside the compression air bladder 50 is connected to the air pipe 81 via a nipple (not shown), and the pressure is increased or decreased by the pressurizing pump 141 and the exhaust valve 142 of the air system component 140 described above. Done. Any material can be used as the material of the resin sheet constituting the compression air bag 50 as long as it is highly stretchable and does not leak from the expansion / contraction space after welding. From such a viewpoint, suitable materials for the resin sheet include ethylene-vinyl acetate copolymer (EVA), soft vinyl chloride (PVC), polyurethane (PU), polyamide (PA), raw rubber, and the like.

  The restricting member 40 is a member for restricting the compression air bag 50 from inflating toward the side opposite to the wrist 200 side, and is opposite to the wrist 200 side in the mounted state when viewed from the pressure air bag 50. Located on the side. That is, the restricting member 40 is located outside the compression air bag 50 so as to cover the compression air bag 50. More specifically, the limiting member 40 has an accommodation space 43 by forming a recess in the main surface on the wrist 200 side, and is accommodated in the accommodation space 43.

  The restricting member 40 is composed of a member having higher rigidity than the compression air bag 50, and is preferably composed of a flexible member. From this point of view, the limiting member 40 is, for example, one formed by injection molding using a resin material such as polypropylene (PP) as a raw material, aluminum (Al) formed by pressing or the like, an alloy thereof, or a metal such as brass Those made of materials are preferably used. The restricting member 40 has one end 41 and the other end 42 in the longitudinal direction thereof, and the portion near the one end 41 and the portion near the other end 42 are overlapped with each other in the mounted state. It is wound around the wrist 200 along the direction. In addition, since the limitation member 40 is comprised with the flexible member as mentioned above, it will elastically deform moderately in the direction along the radial direction of the wrist 200.

  The pressing air bag 30 is a member for pressing the restriction member 40 toward the wrist 200, and is located on the side opposite to the wrist 200 in the mounted state as viewed from the restriction member 40. That is, the pressing air bag 30 is located outside the restriction member 40 so as to cover at least a part of the restriction member 40. Unlike the compression air bag 50, the width of the pressing air bag 30 (the length in the direction along the circumferential direction of the wrist 200 in the mounted state) is adjusted so that it can be widely wound in the circumferential direction of the wrist 200. Preferably, the width is about 30 mm to 120 mm in the contracted state. That is, the width of the pressing air bladder 30 is formed larger than the width of the pressing air bladder 50.

  The pressing air bag 30 is preferably made of a bag-shaped member formed using a resin sheet. As the pressing air bag 30, for example, a bag formed by overlapping two resin sheets and welding the peripheral edges thereof is used. The space inside the pressing air bag 30 is connected to the above-described air pipe 82 via a nipple (not shown), and the pressurizing pump 151 and the exhaust valve 152 of the above-described air system component 150 can increase or decrease the pressure. Done. In addition, as a material of the resin sheet which comprises the air bag 30 for a press, what is abundant in elasticity and can use as long as there is no leak from expansion / contraction space after welding. From such a viewpoint, suitable materials for the resin sheet include ethylene-vinyl acetate copolymer (EVA), soft vinyl chloride (PVC), polyurethane (PU), polyamide (PA), raw rubber, and the like.

  The outer cloth 20 of the outer cover is made of a cloth member having poor stretchability. The outer cloth 20 is a member for restricting the pressing air bag 30 from inflating toward the side opposite to the wrist 200 side. Located on the opposite side. That is, the outer cloth 20 is positioned outside the pressing air bladder 30 so as to cover the pressing air bladder 30. On the other hand, the inner cloth (not shown) is composed of a cloth member that is sufficiently stretchable compared to the outer cloth 20, and the compression force applied to the wrist 200 by the expansion of the compression air bag 50 is the inner cloth. It is comprised so that it may not be inhibited by. The outer cover including the outer cloth 20 and the inner cloth also functions as a fixing member for fixing the above-described compression air bag 50, the limiting member 40, and the pressing air bag 30 to the wrist.

  Here, in the cuff 10 according to the present embodiment, the restricting member 40 presses the living tissue in the vicinity of the portion where the radial artery 212 is located in the attached state toward the radial artery 212 side. have. Specifically, the pressing portions 45 a and 45 b are provided at positions where the compression air bag 50 is sandwiched by being provided on both outer sides of the accommodation space 43 along the circumferential direction of the wrist 200 in the mounted state of the restriction member 40. ing. The pressing portions 45a and 45b are configured by locally projecting the main surface of the limiting member 40 on the wrist 200 side in a gently curved shape, and the limiting member 40 is moved by the pressing air bag 30 in the mounted state. Is pressed toward the radial artery 212 toward the radial artery 212 side.

  Here, the pressing portion 45a removes a living tissue (mainly subcutaneous tissue such as fat) between the surface portion of the wrist 200 to be compressed by the compression air bag 50 and the wrist surface where the rib 210 is located. The pressing portion 45b is pressed toward the radial artery 212 side, and a surface portion of the wrist 200 to be compressed by the compression air bag 50 and a position closer to the surface of the wrist 200 where the ulnar artery 222 is located. The living body tissue (mainly, tendon 230 and subcutaneous tissue such as fat) is pressed toward the radial artery 212 side.

  Further, the surface of the restricting member 40 on the side of the pressing air bag 30 is gently curved. Therefore, the pressing air bladder 30 does not expand in a strain in the circumferential direction, and the pressing of the pressing air bladder 30 against the limiting member 40 is uniform in the circumferential direction. Therefore, the pressing force applied to the restriction member 40 by the pressing air bag 30 is applied to the restriction member 40 without waste, and the restriction member 40 has a wrist 200 at both ends centering on the portion where the accommodation space 43 is provided. It will bend toward the side. As a result, the living tissue in the vicinity of the portion where the radial artery 212 is located is surely and efficiently pressed toward the radial artery 212 by the pressing portions 45a and 45b located at both ends of the accommodation space 43. .

  Therefore, in the state where the pressing air bladder 30 and the compression air bladder 50 are both inflated, the radial artery 212 is pressed by the compression air bladder 50 toward the radial artery 212, and the pressing of the limiting member 40 The radial artery is uniformly compressed along the circumferential direction by the subcutaneous tissue pressed toward the radial artery 212 by the portions 45a and 45b and the subcutaneous tissue located between the radial artery 212 and the radial 210. It is possible to prevent 212 from escaping under the tendon 230 and the radial artery 212 being unevenly compressed along the circumferential direction.

  FIG. 4 is a flowchart showing a flow of blood pressure value measurement processing of the sphygmomanometer according to the present embodiment. Next, with reference to FIG. 4, the flow of the blood pressure value measurement process of the sphygmomanometer in the present embodiment will be described. The program according to this flowchart is stored in advance in the memory unit 170, and the blood pressure value measurement process is performed by the CPU 130 reading and executing the program from the memory unit 170.

  As shown in FIG. 4, when the test subject operates the operation button of the operation unit 190 of the sphygmomanometer 100A to turn on the power, the power as the power source is supplied from the power supply unit 180 to the CPU 130, thereby driving the CPU 130. Then, the blood pressure monitor 100A is initialized (step S101). Here, the subject puts the cuff 10 on the wrist 200 in advance.

  Next, when the CPU 130 enters a measurable state, the CPU 130 closes the exhaust valve 152 and starts driving the pressurizing pump 151 to increase the internal pressure of the pressing air bladder 30 to a predetermined value (step S102).

  Next, the CPU 130 closes the exhaust valve 142 and starts driving the pressure pump 141 to gradually increase the cuff pressure of the compression air bag 50 (step S103). In the process of gradually pressurizing the pressure bladder 50, when the cuff pressure reaches a predetermined level for blood pressure measurement, the CPU 130 stops the pressurizing pump 141 and then gradually closes the exhaust valve 142 that has been closed. The air in the compression bladder 50 is gradually exhausted, and the cuff pressure is gradually reduced (step S104). In sphygmomanometer 100A in the present embodiment, the blood pressure value is measured in the cuff pressure slow depressurization process.

  Next, the CPU 130 calculates blood pressure values such as systolic blood pressure values and diastolic blood pressure values by a known procedure (step S105). Specifically, the CPU 130 extracts pulse wave information based on the oscillation frequency obtained from the oscillation circuit 147 in the process of gradually reducing the cuff pressure of the compression air bladder 50. Then, a blood pressure value is calculated from the extracted pulse wave information. When the blood pressure value is calculated in step S105, the CPU 130 displays the calculated blood pressure value on the display unit 160 (step S106).

  Thereafter, the CPU 130 opens the pressing air bag 30 and the compression air bag 50, and exhausts the air in these air bags completely (step S107). The measurement method described above is based on a so-called decompression measurement method that detects a pulse wave when the pressure bladder 50 is depressurized. However, a so-called pulse wave is detected when the compression bladder 50 is pressurized. Of course, it is also possible to adopt a pressure measurement method.

  In the cuff 10 according to Embodiment 1 of the present invention described above, as described above, when the cuff 10 is attached to the wrist 200 and the blood pressure value is measured, the pressing portion 45a provided on the restriction member 40 is provided. 45b, the living tissue near the radial artery 212 to be measured is pressed toward the radial artery 212, and the radial artery 212 does not escape under the tendon 230. Further, at the time of measurement, the radial arteries 212 to be measured are more evenly compressed in the circumferential direction by the pressing portions 45a and 45b and the compression air bag 50, and are also compressed by the restriction member 40. Since the air bag 50 is prevented from expanding outward, the compression efficiency of the compression air bag 50 against the radial artery 212 is also greatly improved. Furthermore, the position of the wrist 200 to be compressed by the compression air bag 50 is also local, and the wrist 200 is not compressed more than necessary. Therefore, with the above-described configuration, the cuff can be compressed with high efficiency without being affected by tendons and bones, and pain to the subject can be reduced. As a result, by using the sphygmomanometer 100A including the cuff 10 having the above-described configuration, the sphygmomanometer can measure the blood pressure value with higher accuracy without causing the subject more than necessary.

  5 to 8 are cross-sectional views showing first to fourth modified examples of the cuff in the present embodiment. Next, a specific structure of the cuff according to the first to fourth modifications will be described with reference to FIGS. 5 to 8, as in FIG. 3, of the outer cover that covers the surface of the cuff, the illustration of the inner cloth that is positioned on the wrist side in the mounted state is omitted.

  As shown in FIG. 5, the cuff 10 according to the first modification is different in the configuration of the cuff and the compression air bag 50 in the above-described embodiment. The compression air bag 50 provided in the cuff 10 according to the present modification has flange portions 51 at both ends in the circumferential direction of the wrist 200 (that is, both ends in the width direction of the compression air bag 50) in the mounted state. is doing. The flange 51 is provided on both side walls of the compression air bag 50 so that the flange 51 is folded toward the inside of the compression air bag 50 when the compression air bag 50 is contracted. ing.

  By configuring in this manner, it is possible to suppress the inflation of the compression air bag 50 into a balloon shape at the time of measurement so that the surface of the wrist 200 is more evenly compressed in the circumferential direction by the compression air bag 50. Become. Therefore, it is possible to compress the radial artery 212 to be measured with the compression bladder 50 with higher efficiency. Moreover, when the said structure is employ | adopted, since the collar part 51 is restricted to expand | swelling outward further by contact | abutting to the side surface of the accommodation space 43 of the limitation member 40 at the time of expansion | swelling, It is also possible to prevent the flange 51 from being folded toward the outside of the compression air bag 50 when the air bag 50 is contracted.

  As shown in FIG. 6, the cuff 10 according to the second modification is different in the structure of the cuff and the limiting member 40 in the above-described embodiment. In the cuff 10 according to this modification, the surface of the wrist 200 is opposed to a portion where the ulnar artery 222, which is an artery different from the radial artery 212 to be compressed by the compression air bag 50 at the time of measurement, is located. The avoidance space 47 is provided in the restricting member 40 at a position where the ulnar artery 222 and the living tissue in the vicinity thereof can be avoided from being compressed by the pressing air bag 30. The avoidance space 47 is formed by forming a recess in the main surface of the restriction member 40 on the wrist 200 side at the above-described position.

  With this configuration, it is possible to prevent the ulnar artery 222 from being compressed during measurement, and thus it is possible to prevent wrist congestion due to both the ulnar artery 222 and the radial artery 212 being blocked. Become. Therefore, by adopting the above configuration, the subject will not be more painful than necessary. Since a vein as a blood vessel extends in the wrist 200 other than the radial artery 212 and the ulnar artery 222 shown in the figure, if an avoidance space is similarly provided in a portion where the vein is located, Congestion can also be prevented.

  As shown in FIG. 7, the cuff 10 according to the third modification is different in the structure of the cuff and the limiting member 40 in the above-described embodiment. In the cuff 10 according to the present modification, the limiting member 40 does not have a length to be wound around the entire circumference of the wrist 200, and extends only to both outer sides of the portion where the pressing portions 45a and 45b are provided. It is said to be long. Even in such a configuration, the same effect as the cuff in the present embodiment described above can be obtained.

  As shown in FIG. 8, the cuff 10 according to the fourth modification is different in the structure of the cuff and the limiting member 40 in the above-described embodiment. In the cuff 10 according to the present modification, the limiting member 40 is formed in a box shape at the portion where the compression air bag 50 is provided, and therefore the surface of the limiting member 40 on the pressing air bag 30 side is gentle. It is not formed in a curved shape, but is configured to have a step. Even in such a configuration, it is possible to provide the pressing portions 45a and 45b at predetermined positions of the restricting member 40 as shown in the drawing. Even in this configuration, the cuff in the above-described embodiment can be provided. Similar effects can be obtained.

  In the above-described cuff according to the present embodiment and the modification thereof, the case where the limiting member is configured by a flexible member has been described as an example. However, the restricting member does not necessarily need to be a flexible member, and can be configured by a highly rigid member that does not bend even when pressed by the pressing air bag. In that case, it is possible to press the living tissue in the vicinity of the artery to be measured toward the artery side by inclining the shape of the tip of the pressing portion with respect to the wrist surface to be pressed. Further, if the restricting member is divided into two parts and the pressing portion is positioned in each of the two restricting members, and the two divided restricting members are connected to each other by a hinge or the like, a highly rigid member can be used as the restricting member. Even when it is used, the two-part restriction member pressed by the pressing air bag relatively rotates, thereby pressing the living tissue near the artery to be measured toward the artery. Is possible.

  FIG. 9 is a block diagram showing another configuration example of the functional blocks of the sphygmomanometer according to the first embodiment of the present invention. In sphygmomanometer 100A according to the present embodiment described above, air system components 140 and 150 and circuits associated therewith are provided corresponding to compression air bag 50 and pressing air bag 30, respectively, with reference to FIG. It was done. However, it is also possible to share these air system components and the circuits associated therewith with the compression air bag 50 and the pressing air bag 30. In the configuration example shown in FIG. 9, the air pipes 81 and 82 are connected to the three-way valve 149, the remaining one connection port of the three-way valve 149 is connected to the air system component 140, and the three-way valve 149 is connected to the three-way valve drive circuit 148. Thus, the air system component 140 is shared by the compression air bag 50 and the pressing air bag 30. With this configuration, it is not necessary to provide two air system components 140 and 150 and circuits associated therewith, and the number of parts can be reduced, thereby reducing the manufacturing cost.

  In the sphygmomanometer according to the present embodiment and its modification described above, a configuration in which the pressing air bladder is inflated first and then the compression air bladder is inflated is employed. However, it is not always necessary to inflate the pressing air bag and the compression air bag in this order. In order to perform a quicker measurement, a method of simultaneously pressurizing the pressing air bag and the pressing air bag may be employed, and the internal pressure of the pressing air bag may be the same as the inner pressure of the pressing air bag when simultaneously pressing. It is also possible to adopt a pressurizing method that is always maintained higher than the above. In this case, as a target value for pressurization, in the case of a pressing air bag, for example, a pressure value of about 280 mmHg, which is sufficient for the wrist to be pressed by the pressing portion of the restricting member, or input to a sphygmomanometer in advance. A pressure value or the like that is about 40 mmHg higher than the systolic blood pressure value of the subject can be set, and in the case of a compression air bag, a pressure value of, for example, about 280 mmHg that can measure the systolic blood pressure value and the diastolic blood pressure value Alternatively, it is possible to set a pressure value that is about 40 mmHg higher than the systolic blood pressure value of the subject previously input to the sphygmomanometer.

(Embodiment 2)
The blood pressure information measurement device according to Embodiment 2 of the present invention described below is provided with a cuff while lightly compressing the radial artery extending through the wrist using an air bag contained in the cuff. This is a so-called wrist-type plethysmograph that measures the plethysmogram of the radial artery using an optical technique.

  FIG. 10 is a functional block diagram showing a configuration of a plethysmograph including a cuff according to Embodiment 2 of the present invention. First, the configuration of the plethysmograph according to the present embodiment will be described with reference to FIG.

  The plethysmograph 100B in the present embodiment is similar to the above-described sphygmomanometer 100A in the first embodiment of the present invention in its external structure. Further, in the functional block of the plethysmograph 100B in the present embodiment, the configuration is similar to the sphygmomanometer 100A in the first embodiment of the present invention described above. Therefore, the description of the configuration common to blood pressure monitor 100A in the first embodiment of the present invention described above will not be repeated.

  As shown in FIG. 10, the plethysmograph 100 </ b> B has a main body 110 and a cuff 10. The main body 110 further includes a light emitting element drive circuit 121 as a drive unit and a received light amount detection circuit 122 as a received light amount detection unit in addition to the functional blocks described in FIG. The cuff 10 further includes a photoelectric sensor 60 in addition to the functional blocks described in FIG. The photoelectric sensor 60 includes a light emitting element 61 as a light emitting unit that emits light toward a radial artery as a measurement target extending through the wrist, and a portion where the radial artery is positioned as the light emitted from the light emitting element 61 is irradiated. And a light receiving element 62 as a light receiving portion that receives light transmitted through the living tissue in the vicinity thereof. The light receiving element 62 outputs an output signal corresponding to the amount of received light.

  As the light emitting element 61 and the light receiving element 62, a semiconductor light emitting element and a semiconductor light receiving element are preferably used. In order to detect the intra-arterial volume fluctuation with high accuracy, it is preferable to use near-infrared light that easily passes through living tissue as detection light, and the light-emitting element 61 and the light-receiving element 62 emit this near-infrared light. Those capable of receiving light are preferably used. More specifically, near infrared light having a wavelength of about 940 nm is particularly preferably used as detection light emitted from the light emitting element 61 and received by the light receiving element 62. The detection light is not limited to the near-infrared light near 940 nm, and light near a wavelength of 450 nm, light near a wavelength of 1100 nm, or the like can be used.

  The light emitting element driving circuit 121 is a circuit for causing the light emitting element 61 to emit light based on a control signal of the CPU 130, and causes the light emitting element 61 to emit light by applying a predetermined amount of current to the light emitting element 61. As a current applied to the light emitting element 61, for example, a direct current of about 50 mmA is used. As the light emitting element driving circuit 121, a circuit that causes the light emitting element 61 to periodically emit light by supplying a pulse current with a predetermined duty to the light emitting element 61 is preferably used. When the light emitting element 61 is caused to emit light in this manner, it is possible to suppress the power applied to the light emitting element 61 per unit time and to prevent the temperature of the light emitting element 61 from rising. The driving frequency of the light emitting element 61 is set to a frequency (for example, about 3 kHz) sufficiently higher than the frequency component (approximately 30 Hz) included in the intra-arterial volume fluctuation to be detected, thereby more precisely changing the intra-arterial volume fluctuation. It becomes possible to get.

  The received light amount detection circuit 122 is a circuit for generating a voltage signal corresponding to the received light amount based on the signal input from the light receiving element 62 and outputting the voltage signal to the CPU 130. Since the amount of light detected by the light receiving element 62 changes in proportion to the volume in the artery, the voltage signal generated in the received light amount detection circuit 122 also changes in proportion to the volume in the artery. The volume pulse wave is captured as a voltage value fluctuation. Here, the received light amount detection circuit 122 includes processing circuits such as an analog filter circuit, a rectifier circuit, an amplifier circuit, an A / D (Analog / Digital) conversion circuit, and the like, and a signal input as an analog value is converted into a digital value. Output as a converted voltage signal.

  In the plethysmograph 100B, the air system component 140 plays a role of supplying or discharging air to the compression air bag 50 in order to keep the artery in the wrist in a light compression state when measuring the plethysmogram. Along with this, the CPU 130 controls the operation of the pressurization pump 141 and the exhaust valve 142 and detects the internal pressure of the compression air bag 50 based on the signal input from the oscillation circuit 147, thereby the compression air bag. The compression force to the artery by 50 is measured. In addition, the CPU 130 inputs a control signal for driving the light emitting element 61 to the light emitting element driving circuit 121. The CPU 130 acquires a volume pulse wave based on the voltage signal input from the received light amount detection circuit 122. The acquired volume pulse wave information is input to the memory unit 170 and the display unit 160 as a measurement result.

  FIG. 11 is a cross-sectional view showing a state where the cuff according to Embodiment 2 of the present invention is attached to the wrist. Next, the structure of the cuff of the plethysmograph according to the present embodiment will be described in detail with reference to FIG. In FIG. 11, as in FIG. 3, of the outer cover that covers the surface of the cuff, the illustration of the inner cloth that is positioned on the wrist side in the mounted state is omitted.

  As described above, the cuff 10 in the present embodiment has the same configuration as the cuff in the first embodiment of the present invention described above, and further includes the photoelectric sensor 60. Specifically, as shown in FIG. 11, the photoelectric sensor 60 is embedded in the bottom portion of the limiting member 40 that defines the accommodation space 43 in which the compression air bag 50 is accommodated. Here, the light emitting element 61 and the light receiving element 62 are each mounted on a circuit board, and the circuit board is embedded in the bottom of the limiting member 40. Accordingly, the light emitting surface and the light receiving surface of the photoelectric sensor 60 are covered by the compression air bag 50. By forming the compression air bag 50 from a material that can transmit the detection light, The volume pulse wave can be measured by the detection light.

  Also in the cuff 10 in the present embodiment, a pressing portion 45a that presses the living tissue in the vicinity of the portion where the radial artery 212 is located toward the radial artery 212 side at the measurement position at a predetermined position of the limiting member 40. 45b is provided.

  FIG. 12 is a flowchart showing a flow of measurement processing of the volume pulse wave by the volume pulse wave meter in the second embodiment of the present invention. Next, with reference to FIG. 12, the flow of the volume pulse wave measurement process of the volume pulse wave meter in the present embodiment will be described. The program according to this flowchart is stored in advance in the memory unit 170, and the volume pulse wave measurement process is performed by the CPU 130 reading and executing the program from the memory unit 170.

  As shown in FIG. 12, when the subject operates the operation button of the operation unit 190 of the plethysmograph 100B to turn on the power, the power as the power source is supplied from the power supply unit 180 to the CPU 130. Is driven, and the plethysmograph 100B is initialized (step S201). Here, the subject puts the cuff 10 on the wrist 200 in advance.

  Next, the CPU 130 closes the exhaust valves 142 and 152 and starts driving the pressure pumps 141 and 151 when the measurement is possible. As a result, compressed air is fed into the compression air bag 50 and the pressing air bag 30, and the wrist 200 is lightly compressed by the compression air bag 50 and the pressing air bag 30 (step S202). The pressurization air bag 50 and the pressurization air bag 30 are pressurized using the pressurization pumps 141 and 151 until the pressurization air bag 50 and the pressurization air bag 30 reach predetermined internal pressures, respectively. More specifically, the compression air bladder 50 is pressurized to such an extent that the radial artery 212 can be lightly compressed, and the pressing air bladder 30 includes the pressing portions 45 a and 45 b provided on the restriction member 40. Thus, during measurement, the living tissue near the portion where the radial artery 212 is located is pressurized to such an extent that it is pressed toward the radial artery 212 side. In addition, after the said pressurization, the internal pressure of the air bag 50 for compression and the internal pressure of the air bag 30 for a press are each maintained, and the light compression state of the wrist 200 is hold | maintained.

  Next, the CPU 130 starts driving the light emitting element 61 via the light emitting element driving circuit 121 (step S203). Accordingly, the detection light is emitted from the light emitting element 61 toward the wrist including the radial artery 212. In parallel with the driving of the light emitting element 61, the received light amount detection circuit 122 generates a digitalized voltage signal based on the signal input from the light receiving element 62 (step S204), and sends this to the CPU 130. input. CPU130 acquires a volume pulse wave based on the input voltage signal (step S205). The acquired volume pulse wave is stored in the memory unit 170 as a measurement result (step S206), and then displayed on the display unit 160 (step S207). Here, the display unit 160 displays the volume pulse wave as, for example, a waveform.

  The series of operations from Step S204 to Step S207 is repeatedly performed until a predetermined stop condition (for example, input of a measurement stop command by the subject, elapse of a set time by a timer circuit, etc.) is satisfied (Step S204). In the case of NO in S208). When a predetermined stop condition is satisfied (YES in step S208), CPU 130 instructs light emitting element drive circuit 121 to release driving of light emitting element 61 and opens exhaust valves 142 and 152 to the open state. Issue a command to Thereby, the drive of the light emitting element 61 is stopped (step S209), the air in the compression air bag 50 and the pressing air bag 30 is exhausted, and the light compression state is released (step S210). The plethysmograph 100B is in a standby state, and waits for an input of a power-off command from the operation unit 190 of the subject, and stops supplying power as a power source. As described above, the volume pulse wave that changes from moment to moment can be acquired in real time.

  By using the cuff 10 and the plethysmograph 100B including the cuff 10 according to the second embodiment of the present invention described above, the cuff 10 according to the first embodiment of the present invention described above and the sphygmomanometer 100A including the cuff 10 are provided. The same effect as that obtained can be obtained. In other words, with the above configuration, it is possible to obtain a cuff that can compress the artery to be measured with high efficiency without being affected by tendons and bones, and that can reduce pain to the subject. As a result, the plethysmograph capable of measuring the plethysmogram with higher accuracy without causing the subject more pain than necessary.

  In the embodiment of the present invention described above and the modification thereof, the description has been given by exemplifying the configuration in which the cuff is fixed to the wrist using the hook-and-loop fastener provided in the exterior cover. In addition to this, a band-like cuff band, a binding band, a ratchet belt, etc. that are not formed in a bag shape can be used as the fixing member, and the winding length depends on the circumference of the wrist to be worn. Any device can be used as long as it can be adjusted and the mounting state can be reliably maintained.

  In the second embodiment of the present invention described above, the case where the photoelectric sensor is embedded in the bottom portion that defines the accommodating space of the limiting member has been described as an example, but the mounting position of the photoelectric sensor is particularly limited. It is good also as a structure attached to the surface etc. of the inside of the compression air bag or the compression air bag.

  In addition, the characteristic configurations shown in the above-described embodiment of the present invention and the modifications thereof can naturally be combined with each other.

  Further, in the above-described embodiment of the present invention and its modifications, the case where the radial artery is employed as the measurement target has been described as an example. However, the ulnar artery may be employed as the measurement target. Of course it is possible.

  Furthermore, in the above-described embodiment of the present invention and its modifications, the blood pressure information measuring device is a blood pressure meter that measures blood pressure values such as systolic blood pressure values and diastolic blood pressure values, and the volume pulse that measures volume pulse waves. Although the wavemeter has been described as an example, the present invention can naturally be applied to a blood pressure information measurement apparatus that can measure an AI value, a pulse, an average blood pressure value, an oxygen saturation, and the like.

  As described above, the above-described embodiments and modifications thereof disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a perspective view which shows the external appearance structure of the blood pressure meter in Embodiment 1 of this invention. It is a block diagram which shows the structure of the functional block of the sphygmomanometer shown in FIG. It is sectional drawing which shows the state which mounted | wore the wrist with the cuff shown in FIG. It is a flowchart which shows the flow of the measurement process of the blood pressure value of the sphygmomanometer in Embodiment 1 of this invention. It is sectional drawing which shows the 1st modification of the cuff in Embodiment 1 of this invention. It is sectional drawing which shows the 2nd modification of the cuff in Embodiment 1 of this invention. It is sectional drawing which shows the 3rd modification of the cuff in Embodiment 1 of this invention. It is sectional drawing which shows the 4th modification of the cuff in Embodiment 1 of this invention. It is a block diagram which shows the other structural example of the functional block of the sphygmomanometer in Embodiment 1 of this invention. It is a block diagram which shows the structure of the functional block of the sphygmomanometer in Embodiment 2 of this invention. It is sectional drawing which shows the state which mounted | wore the wrist with the cuff in Embodiment 2 of this invention. It is a flowchart which shows the flow of the measurement process of the volume pulse wave of the sphygmomanometer in Embodiment 2 of this invention.

Explanation of symbols

  10 cuff, 20 outer cloth, 21 one end, 22 other end, 30 pressing air bag, 40 restricting member, 41 one end, 42 other end, 43 accommodating space, 45a, 45b pressing portion, 47 avoidance space, 50 for compression Air bag, 51 buttocks, 60 photoelectric sensor, 61 light emitting element, 62 light receiving element, 81, 82 air tube, 100A sphygmomanometer, 100B plethysmograph, 110 main body, 121 light emitting element drive circuit, 122 received light amount detection circuit, 130 CPU, 140, 150 Air system component, 141, 151 Pressure pump, 142, 152 Exhaust valve, 143, 153 Pressure sensor, 145, 155 Pressure pump drive circuit, 146, 156 Exhaust valve drive circuit, 147, 157 Oscillation Circuit, 148 three-way valve drive circuit, 149 three-way valve, 160 display unit, 170 memory unit, 180 electric Source part, 190 operation part, 200 wrist, 210 radius, 212 radial artery, 220 ulna, 222 ulnar artery, 230 tendon.

Claims (10)

A blood pressure information measuring device cuff that is used by being wound around a wrist to measure blood pressure information,
A compression fluid bag disposed on the wrist surface of the portion where the artery is located in the mounted state in order to compress the artery extending through the wrist;
A restricting member that is located on the side opposite to the wrist in the mounted state as viewed from the compression fluid bag and restricts the compression fluid bag from expanding toward the side opposite to the wrist;
A fluid bag for pressing, which is located on the side opposite to the wrist side when viewed from the limiting member, and presses the limiting member toward the wrist side;
The pressure fluid bag is positioned on the side opposite to the wrist side when viewed from the pressing fluid bag, restricts the pressing fluid bag from expanding toward the side opposite to the wrist side, and the pressure fluid bag, A fixing member for fixing the restriction member and the pressing fluid bag to a wrist,
The cuff for a blood pressure information measuring device, wherein the restricting member has a pressing portion that presses a living tissue in the vicinity of a portion where the artery is located toward the artery in the mounted state. The restricting member has an accommodating space in which the compression fluid bag is accommodated,
The blood pressure information measuring device cuff according to claim 1, wherein the pressing portion is provided at a position of the restriction member sandwiching the accommodation space along a circumferential direction of a wrist in a mounted state.   The blood pressure information measuring device cuff according to claim 1, wherein the restriction member is formed of a flexible member.   The cuff for a blood pressure information measurement device according to any one of claims 1 to 3, wherein a surface of the restricting member on the side of the pressing fluid bag is gently curved.   The length of the pressing fluid bag in the direction along the circumferential direction of the wrist in the mounted state is longer than the length of the pressing fluid bag in the direction along the circumferential direction of the wrist in the mounted state. The cuff for a blood pressure information measurement device according to any one of the above.   The restricting member has an avoidance space that avoids compression of the artery at a position facing a wrist surface of a portion where an artery different from the artery compressed by the compression fluid bag in the mounted state is located. The blood pressure information measuring device cuff according to claim 1,   The cuff for a blood pressure information measuring device according to any one of claims 1 to 6, wherein the compression fluid bag has flanges at both ends in a direction along a circumferential direction of a wrist in a mounted state.   A light emitting unit that emits light toward a portion where the artery is located and a living tissue in the vicinity of the portion in the mounted state, and light that has passed through the portion where the artery is located and the living tissue near the portion with the light irradiation. The blood pressure information measurement device cuff according to claim 1, further comprising a photoelectric sensor that includes a light receiving unit that receives light and outputs an output signal corresponding to the amount of received light. A cuff for a blood pressure information measuring device according to any one of claims 1 to 7,
An expansion and contraction mechanism for expanding and contracting the compression fluid bag;
A pressure detector for detecting the pressure in the fluid bag for compression;
A blood pressure information measurement device comprising: a blood pressure value calculation unit that calculates a blood pressure value based on pressure information detected by the pressure detection unit. A cuff for a blood pressure information measuring device according to claim 8,
A driving unit for causing the light emitting unit to emit light;
A received light amount detection unit that detects fluctuations in the received light amount based on an output signal output from the photoelectric sensor;
A blood pressure information measurement device comprising: a volume pulse wave acquisition unit that acquires a volume pulse wave based on information obtained by the received light amount detection unit.

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