JP5251447B2 - Cuff for blood pressure information measuring device and blood pressure information measuring device provided with the same - Google Patents

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.

  Measuring the blood pressure information of the subject is very important for knowing the health status of the subject. In recent years, the present invention is not limited to measuring systolic blood pressure values, diastolic blood pressure values, etc., which have been widely recognized as useful indicators of health management, and various information on health conditions can be obtained from various blood pressure information. Attempts have been made to obtain information. As a new attempt, for example, there is a technique for capturing the state of the heart load or the change in the stiffness of the artery by acquiring the pulse wave of the subject. The blood pressure information measuring device is a device for obtaining indexes for health management based on the measured blood pressure information, and is expected to be further utilized in the fields of early detection, prevention, treatment, etc. of cardiovascular diseases. Yes. The above-described blood pressure information 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, AI (Augmentation Index) value, and the like.

  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.
JP 61-11019 A Japanese Patent Laid-Open No. 1-265941

  However, when the cuff having the configuration disclosed in Patent Documents 1 and 2 is used, the radial length of the wrist surface that is covered with the air bag is short, so that the radial artery or the ulnar artery located under the skin is sufficient. There was a problem that could not be pressed. When the pressure on the artery is insufficient, there is a problem that the measurement accuracy of the blood pressure value is greatly reduced.

  To solve this problem, increase the circumferential length of the wrist surface that will be covered by the air bag, for example, the wrist surface corresponding to the tendon located between the radial artery and the ulnar artery. It is conceivable to configure so that is covered with an air bag. However, even in such a configuration, since the living tissue in the vicinity of the portion where the tendon is located is relatively soft, the air bag is greatly inflated in the portion corresponding to the portion where the tendon is located. There arises a problem that the compression force on the artery to be compressed is insufficient. Therefore, even with the above configuration, the problem that the measurement accuracy of the blood pressure value is lowered cannot be solved.

  Further, in a blood pressure information measuring device (hereinafter also simply referred to as a pulse wave meter) that measures a volume pulse wave using a volume pulse wave detecting means such as a photoelectric sensor, in order to compress an artery as in the above-described blood pressure meter. A configuration in which the air bag is provided in the cuff is employed. In the cuff of the pulse wave meter, the volume pulse wave detecting means such as the photoelectric sensor described above is attached to the air bag itself or the cuff near the portion where the air bag is provided. In the case of the cuff having the configuration as disclosed in 1 and 2, there is a case where the volume pulse wave detecting means may be inclined depending on how the air bag swells, and the accurate volume pulse wave cannot be measured. May be invited.

  Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to provide a cuff for a blood pressure information measurement device that is unlikely to cause insufficient pressure on an artery and a blood pressure information measurement device including the same. And

  The present invention also relates to a blood pressure information measuring device having a volume pulse wave detecting means such as a photoelectric sensor, and a blood pressure information measuring device cuff capable of measuring the volume pulse wave with high accuracy by the volume pulse wave detecting means. It aims at providing the blood-pressure information measuring device provided with.

  A cuff for a blood pressure information measuring device according to the present invention is used by being attached to a wrist to measure blood pressure information, and includes a compression fluid bag, an addressing member, a tightening belt, and a fixing means. It has. In the wearing state, the compression fluid bag covers both the wrist surface where the radial artery is located and the wrist surface where the ulnar artery is located, and is arranged so as to straddle the wrist surface where the tendon is located Is done. In the mounted state, the addressing member is located outside the compression fluid bag and is addressed along the wrist. In the mounted state, the tightening belt tightens the addressing member toward the wrist, thereby pressing the compression fluid bag toward the wrist. The fixing means maintains the state where the addressing member is tightened by the tightening belt. The fastening belt is fixed to the addressing member at a part of the fastening belt which is placed between the wrist surface where the radial artery is located and the wrist surface where the ulnar artery is located when one end of the longitudinal belt is attached. Has been. The said addressing member has a hook part which can hook the said fastening belt to the one end part of the circumferential direction. The blood pressure information measuring device cuff is folded by being hooked on the hooking portion in a state where the fastening belt covers a portion near the other end in the circumferential direction of the addressing member. The fixing member is fixed to the tightening belt of the portion that is not folded back by the fixing means, so that the addressing member can be tightened by the tightening belt.

  In the cuff for a blood pressure information measuring device according to the present invention, it is preferable that the addressing member has an insertion hole through which the tightening belt is inserted at the other end in the circumferential direction.

  In the cuff for a blood pressure information measurement device of the present invention, it is preferable that the addressing member includes a curved elastic plate configured to be elastically deformable in the radial direction.

  In the cuff for a blood pressure information measuring device according to the present invention, the addressing member includes a plurality of parts having substantially the same shape arranged in the circumferential direction, and among the plurality of parts arranged in the circumferential direction. It is preferable to include a freely deformable member constituted by connecting adjacent ones in a rotatable manner.

  In the cuff for a blood pressure information measuring device of the present invention, it is preferable that the addressing member includes a cloth band-shaped member that does not have stretchability in the longitudinal direction.

  In the cuff for a blood pressure information measuring device of the present invention, it is preferable that the fixing means is constituted by a surface fastener provided on the tightening belt.

  In the cuff for a blood pressure information measuring device of the present invention, it is preferable that the hook portion is configured by providing an insertion hole through which the fastening belt is inserted at the one end portion of the addressing member. .

  In the cuff for a blood pressure information measuring device of the present invention, it is preferable that the hook portion is constituted by a ring-shaped member attached to the one end portion of the addressing member.

  Preferably, the cuff for a blood pressure information measuring device according to the present invention is arranged between the portion of the addressing member near the other end and the tightening belt in the mounted state, and is expanded to expand the address. A pressing fluid bag is further provided for pressing the portion of the member near the other end toward the wrist.

  A blood pressure information measurement device cuff according to the first aspect of the present invention includes any one of the aforementioned blood pressure information measurement device cuffs, an expansion / contraction mechanism for expanding and contracting the compression fluid bag, and the compression fluid bag. And a blood pressure value calculating unit for calculating a blood pressure value based on the pressure information detected by the pressure detecting unit.

  Preferably, the cuff for a blood pressure information measuring device according to the present invention emits light toward one of a living tissue of a portion where the radial artery is located and a living tissue of a portion where the ulnar artery is located in the mounted state. And a photoelectric sensor that outputs an output signal corresponding to the amount of received light.

  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.

  ADVANTAGE OF THE INVENTION According to this invention, it can be set as the blood pressure information measuring device provided with this, and the cuff for blood pressure information measuring devices with which the shortage of the compression force with respect to an artery does not arise easily.

  Further, according to the present invention, it is possible to provide a blood pressure information measuring device cuff capable of measuring a volume pulse wave with high accuracy by the volume pulse wave detecting means and a blood pressure information measuring device including the same.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiments described below, 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 Embodiment 1 of the present invention, the radial artery extending through the wrist is compressed using an air bag enclosed in a cuff, and the change in the internal pressure of the radial artery is taken as the change in the internal pressure of the air bag. 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, sphygmomanometer 100A according to the present embodiment includes a main body 110 and a cuff 10A. 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 cuff 10 </ b> A has a belt-like shape that can be wound around the wrist, and the surface thereof is substantially covered with a bag-like exterior cover 11. In sphygmomanometer 100A according to the present embodiment, main body 110 is attached to a predetermined position on the outer peripheral surface of cuff 10A from the viewpoint of miniaturization and improved 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 an air system component 140 and various circuits associated therewith. The air system component 140 is provided corresponding to a compression air bag 30 described later, and 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 connected to a compression air bag 30 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 means for inflating the compressing air bladder 30 by sending air into the compressing air bladder 30. 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 30 to the outside in the open state to contract the compression air bag 30, and the internal pressure of the compression air bag 30 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 pressurizing pump 141 and the exhaust valve 142 correspond to an expansion / contraction mechanism that adjusts the internal pressure of the compression air bladder 30.

  The pressure sensor 143 corresponds to a pressure detection unit that detects the internal pressure of the compression air bladder 30, and outputs an output signal corresponding to the internal pressure of the compression air bladder 30 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.

  As shown in FIG. 2, the cuff 10 </ b> A includes a compression air bag 30 as a compression fluid bag. The compression air bag 30 is accommodated in the exterior cover 11 described above. The compression air bladder 30 is connected to the air system component 140 described above via an air pipe 81.

  3 and 4 are views showing a state in which the cuff shown in FIG. 1 is attached to the wrist, FIG. 3 is a cross-sectional view showing a state before inflating the compression air bag, and FIG. 4 is inflated. It is sectional drawing which shows a back state. Next, with reference to FIG. 3 and FIG. 4, the structure of the cuff of the sphygmomanometer in the present embodiment will be described in detail. 3 and 4 are cross-sectional views of the wrist when the wrist of the left hand is viewed from the central side toward the distal side. In FIGS. 3 and 4, the exterior cover that covers the surface of the cuff is shown. The illustration is omitted.

  As shown in FIGS. 3 and 4, 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 on the surface layer of the wrist 200. Yes. The tendon 230 is located between the radial artery 212 and the ulnar artery 222. The cuff 10A in the present embodiment is used by being wound around the wrist 200 including these living tissues, and selectively compresses the radial artery 212 of the two arteries using the compression air bag 30. The blood pressure value is measured.

  The cuff 10 </ b> A includes a curler 12 as an addressing member and a fastening belt 20 in addition to the compression air bag 30. The curler 12 is a member addressed so as to surround the wrist 200 in the mounted state, and the tightening belt 20 tightens the curler 12 addressed to the wrist 200 toward the wrist 200 so that the compression air bag 30 is attached to the wrist 200. It is a member for pressing toward. The curler 12 is housed in the above-described exterior cover 11 (see FIG. 1) together with the compression air bag 30, and most of the fastening belt 20 is drawn out of the exterior cover 11. The outer cover 11 is joined (for example, stitched) at the periphery of the inner cloth that comes into contact with the surface of the wrist 200 in the attached state and the outer cloth that is positioned outside the inner cloth in the attached state. Or the like), and the compression air bag 30 and the curler 12 described above are mainly accommodated therein.

  In order to compress the radial artery 212 extending through the wrist 200, the compression air bladder 30 is arranged so as to cover a portion including the surface of the wrist 200 where the radial artery 212 is located in the wearing state. More specifically, the compression air bladder 30 covers both the surface of the wrist 200 where the radial artery 212 is located and the surface of the wrist 200 where the ulnar artery 222 is located, and the portion where the tendon 230 is located. In the mounted state, the surface of the wrist 200 where the radial artery 212 is located, the surface of the wrist 200 where the tendon 230 is located, and the ulnar artery 222 in the wearing state are It arrange | positions so that all the surfaces of the wrist 200 of the part to be located may be covered. In particular, in the cuff 10 </ b> A according to the present embodiment, the compression air bag 30 is an area that is approximately half of the wrist 200 along the circumferential direction of the wrist 200 around the surface of the wrist 200 where the radial artery 212 is located. (A region C shown in FIG. 3) is covered.

  The compression air bag 30 is preferably a bag-shaped member formed using a resin sheet. As the compression air bag 30, for example, one formed in a bag shape by overlapping two resin sheets and welding the peripheral edges thereof is used. The space inside the compression air bag 30 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. In addition, as a material of the resin sheet which comprises the compression air bag 30, what kind of thing can be used if it is rich in a stretching property and there is no air 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 curler 12 is composed of a curved elastic plate formed in a substantially cylindrical shape so as to have a shape along the wrist 200, and is located outside the compression air bag 30 in the mounted state. The curler 12 has one cut in the circumferential direction extending along the axial direction, and thus has one end 12a and the other end 12b facing each other along the circumferential direction. Here, the cut provided in the curler 12 is preferably provided in a portion corresponding to the back side of the wrist 200 in the mounted state, and the cuff 10A in the present embodiment is as shown in FIG. 3 and FIG. In addition, it is provided in a portion corresponding to the wrist 200 where the ulnar styloid procession is located. The curler 12 is configured to be elastically deformable in the radial direction while maintaining its cylindrical shape.

  The curler 12 is composed of a member having higher rigidity than the compression air bag 30 and is preferably composed of a flexible member. From this point of view, the curler 12 may be formed by injection molding using a resin material such as polypropylene (PP) as a raw material, or aluminum (Al) or its alloy formed by pressing or the like, or a metal material such as brass. Those made of are preferably used.

  The one end 12a and the other end 12b of the curler 12 are provided with insertion holes 12a1 and 12b1, respectively. A fixing hole 12c1 is provided at a predetermined position between the one end portion 12a and the other end portion 12b of the curler 12. These insertion holes 12 a 1, 12 b 1 and fixing hole 12 c 1 are all provided so as to penetrate the front and back surfaces of the curler 12. Here, the insertion hole 12 a 1 provided in the one end portion 12 a of the curler 12 is a hole for forming a hook portion for enabling the fastening belt 20 to be hooked on the one end portion 12 a of the curler 12. In addition, a fixing attachment portion 12c extending in a rod shape along the axial direction of the curler 12 is provided inside the fixing hole 12c1. One end portion 20a of the tightening belt 20 is fixed to the attachment portion 12c.

  The tightening belt 20 is a member for tightening the curler 12 toward the wrist 200 and pressing the compression air bag 30 toward the wrist 200 as described above, and is a flexible long member extending along the circumferential direction of the cuff 10A. It consists of the member. The fastening belt 20 has one end portion 20a and the other end portion 20b in the longitudinal direction, and a surface fastener 24 is attached on the outer peripheral surface of the fastening belt 20 near the other end portion 20b in the longitudinal direction. . The fastening belt 20 is preferably made of a non-stretchable or slightly stretchable member, and is made of a belt-like member such as cloth or synthetic resin. The surface fastener 24 corresponds to a fixing means for maintaining the state in which the curler 12 is tightened by the tightening belt 20, and the surface fastener 24 is addressed to the surface of the tightening belt 20 as a fixed surface. The fastening belt 20 is fixed.

  One end portion 20a in the longitudinal direction of the fastening belt 20 is fixed to the mounting portion 12c of the curler 12 described above. More specifically, one end portion 20a of the tightening belt 20 is inserted into the fixing hole 12c1 of the curler 12 and is folded toward a predetermined position of the tightening belt 20 while being wound around the rod-shaped attachment portion 12c. By fixing the fastening belt 20 to the portion of the fastening belt 20 that is not folded back by sewing or the like, one end portion 20a of the fastening belt 20 is fixed to the attachment portion 12c.

  The tightening belt 20 is wound so as to cover a portion near the other end 12b of the curler 12 in the mounted state, and is inserted from the outer side to the inner side into the insertion hole 12b1 provided in the other end 12b of the curler 12. Rarely, it is inserted from the inner side to the outer side with respect to the insertion hole 12 a 1 provided in the one end portion 12 a of the curler 12. The tightening belt 20 is inserted into the insertion hole 12a1 so as to be hooked on the hook portion located at the one end portion 12a of the curler 12, and is folded back from the hook portion as a base point. Is fixed by the above-described hook and loop fastener 24 by being superimposed on the fastening belt 20 of the portion that is not folded back.

  Here, in the cuff 10A in the present embodiment, the fixing hole 12c1 provided in the curler 12 has a wrist 200 where the radial artery 212 is located and the wrist 200 where the ulnar artery 222 is located in the wearing state. It is provided in the curler 12 of the part addressed between the surface. Therefore, one end 20a of the tightening belt 20 is a portion that is placed between the surface of the wrist 200 where the radial artery 212 is located and the surface of the wrist 200 where the ulnar artery 222 is located (see FIG. It is fixed to the curler 12 in the area D).

  With this configuration, when the cuff 10A is attached to the wrist 200, the tightening belt 20 is pulled by pulling the portion closer to the other end 20b of the tightening belt 20 hooked by the hook portion in a direction away from the hook portion. The curler 12 can be brought into a state of being tightened toward the wrist 200 by fixing the tightening belt 20 with the above-described hook and loop fastener 24 while maintaining the state in which the tightening belt 20 is pulled. The compression air bag 30 can be pressed against the wrist 200. In this state, the fastening belt 20 is fixed by the hook-and-loop fastener 24, and the cuff 10 </ b> A is attached to the wrist 200 while the pressure air bag 30 is pressed against the wrist 200 by the curler 12. Can do.

  In the mounted state, A1 and A2 shown in the drawing along the circumferential direction of the cuff 10A along the circumferential direction of the curler 12 with the one end portion 12a of the curler 12 provided with the hook portion and the portion provided with the attachment portion 12c as base points. Tensile force is generated in the direction B1 and the direction B1, B2. Here, the one end portion 12a of the curler 12 provided with the hook portion and the portion provided with the attachment portion 12c are located on the substantially opposite sides with respect to the wrist 200. It is applied almost evenly over the 12 circumferential directions. Therefore, as shown in FIG. 4, even when the compression bladder 30 is inflated, the curler 12 corresponding to the portion where the tendon 230 of the wrist 200 is located or the portion where the ulnar artery 222 of the wrist 200 is located is the wrist. The air bag 30 for compression is appropriately pressed toward the wrist 200 in these portions without being lifted from the 200, and these portions are appropriately compressed by the air bag 30 for compression. Further, in the portion of the wrist 200 where the radial artery 212 is located, the compression air bladder 30 is surely inflated with a predetermined stroke E, so that the living tissue near the portion where the radial artery 212 is located is reliably compressed. The air bag 30 is compressed.

  FIG. 5 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. 5, 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. 5, 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 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 wears the cuff 10A on the wrist 200 in advance.

  Next, when the CPU 130 enters the measurable state, the exhaust valve 142 is closed and the drive of the pressurizing pump 141 is started to increase the cuff pressure of the compression air bladder 30 (step S102). In the process of pressurizing the compression air bag 30, when the cuff pressure reaches a predetermined level for blood pressure measurement, the CPU 130 stops the pressurizing pump 141 and then gradually opens the closed exhaust valve 142. Thus, the air in the compression air bag 30 is gradually exhausted, and the cuff pressure is gradually reduced (step S103). 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 S104). 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 30. Then, a blood pressure value is calculated from the extracted pulse wave information. When the blood pressure value is calculated in step S104, the CPU 130 displays the calculated blood pressure value on the display unit 160 (step S105).

  Thereafter, the CPU 130 opens the compression air bag 30 and exhausts the air in the air bag completely (step S106). Thus, the blood pressure value measurement is completed. The measurement method described above is based on a so-called decompression measurement method that detects a pulse wave when the compression air bladder 30 is decompressed. Of course, it is possible to employ a so-called pressurization measurement method that detects a pulse wave during pressurization.

  In the cuff 10A in the present embodiment described above, as described above, when the cuff 10A is attached to the wrist 200 and the blood pressure value is measured, the curler 12 as an addressing member is directed to the wrist 200. Therefore, the radial artery 212 to be compressed can be compressed toward the radius 210 by the compression air bag 30 with a predetermined stroke. In addition, even at the portion where the tendon 230 and the ulnar artery 222 are located, the wrist 200 can be pressed in the depth direction by the compression air bag 30 with an appropriate compression force. Therefore, the compression force by the compression air bag 30 can be efficiently applied to the radial artery 212 that is the object of compression, and the radial artery 212 can be more uniformly compressed in the circumferential direction. Therefore, by using the cuff 10A having the above-described configuration, it is possible to make it difficult to cause a shortage of compression force on the radial artery 212. The blood pressure value can be measured.

  6 to 9 are cross-sectional views showing first to fourth modified examples of the cuff according to the present embodiment. FIG. 10 is a schematic plan view for explaining a connecting structure of parts constituting the freely deformable member of the cuff according to the fourth modified example. Next, with reference to these FIG. 6 thru | or FIG. 9, the specific structure of the cuff which concerns on the 1st thru | or 4th modification of this Embodiment is demonstrated. 6 to 9, illustration of the exterior cover that covers the surface of the cuff is omitted as in FIGS.

(First modification)
As shown in FIG. 6, the cuff 10 </ b> B according to the first modified example is different from the cuff 10 </ b> A in the above-described embodiment in the configuration of the addressing member. In the above-described cuff 10A in the present embodiment, the case where a cylindrical curved elastic plate having only one cut in the circumferential direction is used as the addressing member. However, in the cuff 10B according to this modification, Two curved elastic plates configured along the wrist 200, a ring-shaped member connecting the two curved elastic plates, and a ring-shaped member attached to the circumferential ends of the two curved elastic plates It constitutes an irrigation member.

  Specifically, as shown in FIG. 6, the cuff 10 </ b> B according to this modification includes two divided curlers 13 and 14, a ring-shaped member 15 c that connects these divided curlers 13 and 14, and the divided curlers 13 and 14. Ring-shaped members 15a and 15b attached to the end in the circumferential direction not connected by the ring-shaped member 15c. The split curler 13 is configured in a shape along the surface of the wrist 200 on the side where the rib 210 is located, and the split curler 14 is configured in a shape along the surface of the wrist 200 on the side where the ulna 220 is located. Has been. A ring-shaped member 15 a is attached to one end portion 13 a in the circumferential direction of the divided curler 13, and a ring-shaped member 15 c is attached to the other end portion 13 b in the circumferential direction of the divided curler 13. A ring-shaped member 15 c is attached to one end portion 14 a in the circumferential direction of the divided curler 14, and a ring-shaped member 15 b is attached to the other end portion 14 b in the circumferential direction of the divided curler 14.

  Each of the ring-shaped members 15a and 15b is made of a member having a substantially rectangular outer shape made of, for example, a metal material or a hard resin material, and has an opening through which the tightening belt 20 can be inserted. Among these, the opening part of the ring-shaped member 15 a is a hole for forming a hook part for enabling the fastening belt 20 to be hooked on the one end part 13 a of the divided curler 13. On the other hand, the ring-shaped member 15c is made of, for example, a metal material or a hard resin material, and is formed of a member having a substantially rectangular outer shape provided with a mounting portion 15c1 extending in a rod shape. One end portion 20a of the tightening belt 20 is fixed to the attachment portion 15c1 provided on the ring-shaped member 15c.

  The tightening belt 20 is wound so as to cover the divided curler 14 in the mounted state, and is inserted from the outside toward the inside with respect to the opening of the ring-shaped member 15b attached to the other end 14b of the divided curler 14, Further, it is inserted from the inside toward the outside with respect to the opening of the ring-shaped member 15 a attached to the one end 13 a of the divided curler 13. Then, the tightening belt 20 is inserted into the opening of the ring-shaped member 15a so as to be hooked on the hook portion located at the one end portion 13a of the divided curler 13, and is folded back with the hook portion as a base point. This folded portion is fixed by the surface fastener 24 by being superimposed on the fastening belt 20 of the portion that is not folded.

  Here, in the cuff 10B according to the present embodiment, the ring-shaped member 15c located between the divided curlers 13 and 14 is located on the surface of the wrist 200 where the radial artery 212 is located and the ulnar artery 222 in the mounted state. It is located in the part addressed between the surface of the wrist 200 of the part. Accordingly, the one end portion 20a of the fastening belt 20 is attached to the portion of the fastening belt 20 that is placed between the surface of the wrist 200 where the radial artery 212 is located and the surface of the wrist 200 where the ulnar artery 222 is located. It is fixed to an irrigation member (specifically, ring-shaped member 15c).

  With this configuration, when the cuff 10B is attached to the wrist 200, the tightening belt 20 is pulled by pulling the portion near the other end 20b of the tightening belt 20 hooked by the hook portion in a direction away from the hook portion. Thus, the split curlers 13 and 14 can be tightened toward the wrist 200, and the tightening belt 20 is fixed by the above-described hook and loop fastener 24 while keeping the tightening belt 20 pulled. The compressed air bag 30 can be pressed against the wrist 200 by the divided curlers 13 and 14. Then, by fixing the fastening belt 20 with the surface fastener 24 in this state, the cuff 10B is placed on the wrist 200 while maintaining the state where the compression air bag 30 is pressed against the wrist 200 by the divided curlers 13 and 14. Can be attached.

  In the mounted state, the end member 13a of the split curler 13 provided with the hook portion and the portion provided with the attachment portion 15c1 of the ring-shaped member 15c are used as the base members along the circumferential direction of the cuff 10B. Tensile forces are generated in the directions A1, A2 and B1, B2, respectively. Therefore, similarly to the case of the cuff 10A in the present embodiment described above, the above-described pulling force is applied almost evenly in the circumferential direction of the addressing member. Therefore, even when the cuff 10B is configured as in the present modification, the same effect as when the cuff 10A is configured as in the above-described embodiment can be obtained.

(Second modification)
As shown in FIG. 7, the cuff 10 </ b> C according to the second modified example has the left and right reversed configurations of the cuff 10 </ b> A in the present embodiment described above. That is, the cuff 10C according to the present modification measures the blood pressure value by selectively pressing the ulnar artery 222 of the two arteries extending through the wrist 200 using the compression air bag 30. In this respect, the configuration is different from the cuff 10A in the present embodiment described above.

  Specifically, as shown in FIG. 7, in the cuff 10 </ b> C according to the present modification, the cut provided in the curler 12 is provided in a portion corresponding to the wrist 200 where the rib-shaped protrusion is located. In addition, the fixing hole 12c1 provided in the curler 12 is a portion that is assigned between the surface of the wrist 200 where the radial artery 212 is located and the surface of the wrist 200 where the ulnar artery 222 is located in the mounted state. It is provided on the curler 12 (portion indicated by region D in the figure).

  When configured in this manner, when the cuff 10C is attached to the wrist 200 and the blood pressure value is measured, the curler 12 as an addressing member can be uniformly tightened over the circumferential direction toward the wrist 200. Therefore, the ulnar artery 222 to be compressed can be compressed toward the ulna 220 side by the compression air bag 30 with a predetermined stroke, and the tendon 230 and the radial artery 212 are positioned. Even in the portion to be pressed, the wrist 200 can be pressed in the depth direction by the pressing air bag 30 with an appropriate pressing force. Therefore, the compression force by the compression air bladder 30 can be efficiently applied to the ulnar artery 222 that is the object of compression, and the ulnar artery 222 can be more evenly compressed in the circumferential direction. Therefore, by using the cuff 10C having the above-described configuration, it is possible to make it difficult to cause a shortage of compressive force on the ulnar artery 222. The value can be measured.

(Third Modification)
As shown in FIG. 8, the cuff 10D according to the third modified example is different from the cuff 10A in the above-described embodiment in the material of the addressing member. In the above-described cuff 10A in the present embodiment, the case where a cylindrical curved elastic plate is used as the addressing member has been shown. However, in the cuff 10D according to the present modification, the addressing member is stretchable in the longitudinal direction. A belt-like cloth member 16 that does not have a gap is used. The cloth member 16 does not have flexibility like a curved elastic plate, and can be freely deformed into an arbitrary shape.

  A ring-shaped member 15 a is attached to one end 16 a in the circumferential direction of the cloth member 16, and a ring-shaped member 15 b is attached to the other end 16 b in the circumferential direction of the cloth member 16. These ring-shaped members 15a and 15b are the same as the ring-shaped members 15a and 15b in the first modification described above, and both have a substantially rectangular outer shape made of, for example, a metal material or a hard resin material. And an opening through which the tightening belt 20 can be inserted. Among these, the opening of the ring-shaped member 15 a is a hole for forming a hook portion for enabling the fastening belt 20 to be hooked on the one end portion 16 a of the cloth member 16.

  One end 20a in the longitudinal direction of the fastening belt 20 is fixed to the predetermined position of the cloth member 16 by, for example, sewing. The fixing portion 16c to which the one end portion 20a of the fastening belt 20 is fixed is the surface of the wrist 200 where the radial artery 212 is located and the surface of the wrist 200 where the ulnar artery 222 is located in the wearing state of the cloth member 16. Is located between.

  The tightening belt 20 is wound so as to cover a portion near the other end 16b of the cloth member 16 in the mounted state, and from the outside with respect to the opening of the ring-shaped member 15b attached to the other end 16b of the cloth member 16. It is inserted toward the inside and further inserted from the inside toward the outside with respect to the opening of the ring-shaped member 15 a attached to one end 16 a of the cloth member 16. The tightening belt 20 is inserted into the opening of the ring-shaped member 15a to be hooked on the hook portion located at the one end portion 16a of the cloth member 16, and is folded back with the hook portion as a base point. This folded portion is fixed by the surface fastener 24 by being superimposed on the fastening belt 20 of the portion that is not folded.

  In the mounted state, the cloth member 16 extends along the circumferential direction of the cuff 10D with the one end portion 16a of the cloth member 16 provided with the hook portion and the portion of the cloth member 16 to which the one end portion 20a of the fastening belt 20 is fixed as a base point. Tensile forces are generated on the member 16 in the directions A1, A2 and B1, B2, respectively. Therefore, similarly to the case of the cuff 10A in the present embodiment described above, the above-described pulling force is applied almost evenly in the circumferential direction of the addressing member. Therefore, even when the cuff 10D is configured as in the present modification, the same effect as when the cuff 10A is configured as in the above-described embodiment can be obtained.

(Fourth modification)
As shown in FIG. 9, the cuff 10E according to the fourth modification is different from the cuff 10A in the above-described embodiment in the configuration of the addressing member. In the above-described cuff 10A in the present embodiment, the case where a cylindrical curved elastic plate having only one cut in the circumferential direction is used as the addressing member. However, in the cuff 10B according to this modification, As the addressing member, a plurality of parts having substantially the same shape are arranged side by side in the circumferential direction, and adjacent parts among the plurality of parts arranged in the circumferential direction are connected to each other by a connecting pin so as to be rotatable. Used. With this configuration, the addressing member can be a belt-like freely deformable member 17 that can be changed to an arbitrary shape, and the freely deformable member 17 can be fitted to the wrist 200 in the mounted state.

  An insertion hole 17a1 is provided in a part 17a located at one end portion in the circumferential direction of the freely deformable member 17 formed by connecting a plurality of parts, and the other end portion in the circumferential direction of the freely deformable member 17 is provided. The part 17b that is positioned is provided with an insertion hole 17b1. Among these, the insertion hole 17a1 provided in the part 17a located at one end of the universally deformable member 17 is used to form a hook for enabling the fastening belt 20 to be hooked at one end of the universally deformable member 17. It is a hole. The part 17c located at a predetermined position in the circumferential direction of the freely deformable member 17 is provided with a mounting portion 17c1 protruding outward. One end portion 20a of the tightening belt 20 is fixed to the attachment portion 17c1 provided in the part 17c.

  The fastening belt 20 is wound so as to cover a portion from the other end of the freely deformable member 17 in the mounted state, and from the outside to the insertion hole 17b1 provided in the part 17b located at the other end of the freely deformable member 17. It is inserted toward the inside, and is further inserted from the inside toward the outside with respect to an insertion hole 17a1 provided in the part 17a located at one end of the freely deformable member 17. The tightening belt 20 is inserted into the insertion hole 17a1 provided in the part 17a located at one end of the freely deformable member 17, and is hooked by the hook portion located at one end of the freely deformable member 17. Then, the hooked portion is folded back to the base point, and the folded portion is overlapped with the tightening belt 20 of the portion that is not folded, thereby being fixed by the surface fastener 24.

  Here, in the cuff 10E according to the present embodiment, the part 17c provided with the attachment portion 17c1 is attached to the surface of the wrist 200 where the radial artery 212 is located and the wrist 200 where the ulnar artery 222 is located. It is located in the part addressed to the surface of the. Accordingly, the one end portion 20a of the fastening belt 20 is attached to the portion of the fastening belt 20 that is placed between the surface of the wrist 200 where the radial artery 212 is located and the surface of the wrist 200 where the ulnar artery 222 is located. It will be fixed to the insulator (specifically, part 17c).

  With this configuration, when the cuff 10E is attached to the wrist 200, the tightening belt 20 is pulled by pulling a portion near the other end 20b of the tightening belt 20 hooked by the hook portion in a direction away from the hook portion. The flexible deformation member 17 can be tightened toward the wrist 200, and the tightening belt 20 is fixed by the above-described hook and loop fastener 24 while the tightening belt 20 is pulled. The pressure bladder 30 can be pressed against the wrist 200 by the deformable member 17. Then, by fixing the fastening belt 20 with the surface fastener 24 in this state, the cuff 10E is attached to the wrist 200 while maintaining the state in which the compression air bag 30 is pressed against the wrist 200 by the freely deformable member 17. Can be made.

  In the mounted state, along the circumferential direction of the cuff 10E, the base point is the part where the part 17a where the hooking part of the freely deformable member 17 is provided and the part where the part 17c where the attachment part 17c1 is provided. Tensile force is generated in the freely deformable member 17 in the directions A1, A2 and B1, B2 shown in the drawing. Therefore, similarly to the case of the cuff 10A in the present embodiment described above, the above-described pulling force is applied almost evenly in the circumferential direction of the addressing member. Therefore, even when the cuff 10E having the configuration as in the present modification is used, the same effect as that of the cuff 10A having the configuration as in the present embodiment described above can be obtained.

(Embodiment 2)
The blood pressure information measuring device according to the second embodiment of the present invention uses an air bag in which the radial artery extending through the wrist is included in the cuff, similarly to the blood pressure information measuring device according to the first embodiment of the present invention described above. This is a so-called wrist type sphygmomanometer that measures the blood pressure values such as the systolic blood pressure value and the diastolic blood pressure value based on the fluctuation of the internal pressure of the radial artery.

  FIG. 10 is a block diagram showing a functional block configuration of the sphygmomanometer according to the second embodiment of the present invention. 11 and 12 are views showing a state in which the cuff in the present embodiment is attached to the wrist, FIG. 11 is a cross-sectional view showing a state before the compression air bag is inflated, and FIG. It is sectional drawing which shows the state after being expanded. Next, with reference to FIGS. 10 to 12, the configuration of the sphygmomanometer and the structure of the cuff included therein will be described in detail. In FIG. 11 and FIG. 12, illustration of an exterior cover that covers the surface of the cuff is omitted.

  Sphygmomanometer 100B in the present embodiment is similar to sphygmomanometer 100A in the first embodiment of the present invention described above in terms of its external structure. In the functional block of sphygmomanometer 100B in the present embodiment, the configuration is similar to 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, in the sphygmomanometer 100B in the present embodiment, the cuff 10F includes a pressing air bag 40 as a pressing fluid bag in addition to the pressing air bag 30 as a pressing fluid bag. It has. The compression air bag 30 is an air bag for selectively compressing the radial artery to be compressed, and the pressing air bag 40 applies a living tissue near the ulnar artery or a living tissue near the tendon to the inside of the wrist. It is an air bag for pressing toward. Therefore, in the sphygmomanometer 100B according to the present embodiment, the main body 110 has the air bag 40 for pressing in addition to the air system component 140 provided corresponding to the compression air bag 30 and various circuits associated therewith. The air system component 150 and the various circuits associated therewith are provided.

  Specifically, as shown in FIG. 10, the air system component 150 for pressurizing and depressurizing the pressing air bag 40 includes a pressurizing pump 151, an exhaust valve 152, and a pressure sensor 153. The pressurizing pump 151, the exhaust valve 152, and the pressure sensor 153 are each connected to a pressing air bag 40 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 40 by sending air into the pressing air bag 40. 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 pressure reducing means for exhausting air from the space inside the pressing air bag 40 to the outside in the open state to contract the pressing air bag 40, and the internal pressure of the pressing air bag 40 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 pressurization pump 151 and the exhaust valve 152 correspond to an expansion / contraction mechanism that adjusts the internal pressure of the pressing air bladder 40.

  The pressure sensor 153 corresponds to a pressure detection unit that detects the internal pressure of the pressing air bladder 40, and outputs an output signal corresponding to the internal pressure of the pressing air bladder 40 toward 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 FIGS. 11 and 12, the pressing air bag 40 is a member for pressing a portion near the other end 12 b of the curler 12 as an addressing member toward the wrist 200 by expanding. In the mounted state, the curler 12 is disposed between the portion near the other end 12 b in the circumferential direction and the fastening belt 20. More specifically, the pressing air bladder 40 has one end portion in the circumferential direction located on the surface of the wrist 200 where the tendon 230 is located, and the other end portion in the circumferential direction where the ulnar artery 222 is located. It is arranged so as to reach a position closer to the other end 12 b of the curler 12 than on the surface of the wrist 200.

  The pressing air bag 40 is preferably made of a bag-like member formed using a resin sheet. As the pressing air bag 40, 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 40 is connected to the above-described air pipe 82 through a nipple (not shown), and the pressurizing pump 151 and the exhaust valve 152 of the above-described air system component 150 are used to increase or decrease the pressure. Done. In addition, as a material of the resin sheet which comprises the pressurization air bag 40, what is abundant in elasticity and can be utilized as long as there is no leakage 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.

  Also in the cuff 10F in the present embodiment, one end portion 20a of the tightening belt 20 is in a state of being attached to the surface of the wrist 200 where the radial artery 212 is located and the surface of the wrist 200 where the ulnar artery 222 is located. The fastening belt 20 is provided at one end portion 12a of the curler 12 so as to cover a portion near the other end portion 12b of the curler 12 in the mounted state. The folded portion is folded by being hooked by the hook portion, and the folded portion is fixed by the surface fastener 24 by being overlapped with the tightening belt 20 of the unfolded portion.

  FIG. 13 is a flowchart showing the flow of the blood pressure value measurement process of the sphygmomanometer in the present embodiment. Next, the flow of the blood pressure value measurement process of the sphygmomanometer according to the present embodiment will be described with reference to FIG. 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. 13, when the subject operates the operation button of the operation unit 190 of the sphygmomanometer 100B to turn on the power, the power as the power is supplied from the power supply unit 180 to the CPU 130, thereby driving the CPU 130. Then, the blood pressure monitor 100B is initialized (step S201). Here, the subject wears the cuff 10F on the wrist 200 in advance.

  Next, when the CPU 130 enters the measurable state, it closes the exhaust valve 152 and starts driving the pressurizing pump 151 to increase the internal pressure of the pressing air bladder 40 to a predetermined value (step S202).

  Next, the CPU 130 closes the exhaust valve 142 and starts driving the pressurizing pump 141 to increase the cuff pressure of the compression air bladder 30 (step S203). In the process of pressurizing the compression air bag 30, when the cuff pressure reaches a predetermined level for blood pressure measurement, the CPU 130 stops the pressurizing pump 141 and then gradually opens the closed exhaust valve 142. Thus, the air in the compression air bag 30 is gradually exhausted, and the cuff pressure is gradually reduced (step S204). In sphygmomanometer 100B in the present embodiment, the blood pressure value is measured in the process of reducing the cuff pressure very slowly.

  Next, the CPU 130 calculates blood pressure values such as systolic blood pressure values and diastolic blood pressure values by a known procedure (step S205). 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 30. Then, a blood pressure value is calculated from the extracted pulse wave information. When the blood pressure value is calculated in step S205, the CPU 130 displays the calculated blood pressure value on the display unit 160 (step S206).

  Thereafter, the CPU 130 opens the pressing air bag 40 and the compression air bag 30 and exhausts the air in these air bags completely. Thus, the blood pressure value measurement is completed. Note that the pressurization measurement method can also be adopted in sphygmomanometer 100B in the present embodiment, as in sphygmomanometer 100A in the first embodiment of the present invention.

  Even when the cuff 10F in the present embodiment described above is used, the same effect as that in the case of the cuff 10A in the first embodiment described above can be obtained. That is, when the cuff 10F is attached to the wrist 200 and the blood pressure value is measured, the curler 12 as an addressing member can be uniformly tightened over the circumferential direction toward the wrist 200. The compression force of 30 can be efficiently applied to the radial artery 212 that is a compression target, and the radial artery 212 can be more uniformly compressed in the circumferential direction. Therefore, by using the cuff 10F having the above-described configuration, it is possible to make it difficult for a shortage of compression force to be applied to the radial artery 212. The blood pressure value can be measured.

  Furthermore, in the cuff 10F according to the present embodiment, when the radial artery 212 is compressed using the compression air bag 30, the portion where the tendon 230 is located using the pressing air bag 40 or the wrist 200 is provided. By preventing the curler 12 of the portion corresponding to the portion where the ulnar artery 222 is located from being lifted from the wrist 200, it is possible to prevent the portion of the compression air bag 30 corresponding to the portion from being excessively inflated. The compression force by the air bag 30 can be efficiently applied to the radial artery 212. Therefore, by using the cuff 10F having the above-described configuration, it is possible to make it more difficult for the shortage of the compression force to be applied to the radial artery 212. The blood pressure value can be measured with high accuracy.

  FIG. 14 is a block diagram illustrating another configuration example of the functional blocks of the sphygmomanometer according to the second embodiment of the present invention. In sphygmomanometer 100B according to the present embodiment described above, air system components 140 and 150 and circuits associated therewith are provided corresponding to compression air bag 30 and pressing air bag 40, 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 30 and the pressing air bag 40.

  As shown in FIG. 14, in the sphygmomanometer 100C in this configuration example, the air tubes 81 and 82 are connected to the three-way valve 149, and the remaining one connection port of the three-way valve 149 is connected to the air system component 140. The air component 140 is shared by the compression air bag 30 and the pressing air bag 40 by switching the three-way valve 149 using the three-way valve drive circuit 148. 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 sphygmomanometers 100B and 100C according to the above-described embodiment and the modifications thereof, a configuration in which the pressing air bag 40 is inflated first and then the compression air bag 30 is inflated is employed. However, it is not always necessary to inflate the pressing air bag 40 and the pressing air bag 30 in this order. In order to perform quicker measurement, a method of simultaneously pressurizing the pressing air bag 40 and the pressing air bag 30 may be adopted, and the internal pressure of the pressing air bag 40 is compressed air when the pressing is performed simultaneously. You may employ | adopt the pressurization system which is always maintained higher than the internal pressure of the bag 30. FIG.

(Embodiment 3)
The blood pressure information measuring device according to Embodiment 3 of the present invention is provided with a cuff while lightly compressing the radial artery extending through the wrist using an air bag contained in the cuff and maintaining this light compression state. This is a so-called wrist-type pulse wave meter that measures the volume pulse wave of the radial artery using an optical technique using a photoelectric sensor.

  FIG. 15 is a functional block diagram showing a configuration of a pulse wave meter including a cuff according to Embodiment 3 of the present invention. First, the configuration of the pulse wave meter in the present embodiment will be described with reference to FIG.

  Pulse wave meter 100D in the present embodiment is similar to blood pressure monitor 100A in the first embodiment of the present invention described above in terms of its external structure. Further, in the functional block of pulse wave meter 100D in the present embodiment, the configuration is similar to blood pressure monitor 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. 15, pulse wave meter 100D has a main body 110 and a cuff 10G. 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 10G 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 mA 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 pulse wave meter 100D, the air system component 140 plays a role of supplying or discharging air to the compression bladder 30 in order to keep the radial artery in the wrist in a light compression state when measuring the volume pulse wave. Accordingly, 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 30 based on the signal input from the oscillation circuit 147, thereby the compression air bag. The compression force to the radial artery by 30 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. 16 is a cross-sectional view showing a state where the cuff according to the third embodiment of the present invention is attached to the wrist. Next, the structure of the cuff of the pulse wave meter in the present embodiment will be described in detail with reference to FIG. In FIG. 16, the exterior cover that covers the surface of the cuff is not shown.

  As described above, the cuff 10G 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. 16, the photoelectric sensor 60 is provided inside the compression air bladder 30 and on the main surface of the compression air bladder 30 on the side in contact with the curler 12. Here, the light emitting element 61 and the light receiving element 62 are each mounted on a circuit board, and the circuit board is attached to the compression air bag 30. Accordingly, the light emitting surface and the light receiving surface of the photoelectric sensor 60 are covered with the compression air bag 30. By forming the compression air bag 30 with a material that can transmit the detection light, The volume pulse wave can be measured by the detection light.

  Also in the cuff 10G in the present embodiment, one end portion 20a of the fastening belt 20 is in a state of being attached to the surface of the wrist 200 where the radial artery 212 is located and the surface of the wrist 200 where the ulnar artery 222 is located. The fastening belt 20 is provided at one end portion 12a of the curler 12 so as to cover a portion near the other end portion 12b of the curler 12 in the mounted state. The folded portion is folded by being hooked by the hook portion, and the folded portion is fixed by the surface fastener 24 by being overlapped with the tightening belt 20 of the unfolded portion.

  FIG. 17 is a flowchart showing the flow of volume pulse wave measurement processing by the pulse wave meter according to Embodiment 3 of the present invention. Next, with reference to FIG. 17, the flow of the measurement process of the volume pulse wave of the 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. 17, when the subject operates the operation button of the operation unit 190 of the sphygmomanometer 100D to turn on the power, the power as the power source is supplied from the power supply unit 180 to the CPU 130. Driven to initialize pulse wave meter 100D (step S301). Here, the subject puts the cuff 10G on the wrist 200 in advance.

  Next, when the CPU 130 enters the measurable state, the CPU 130 closes the exhaust valve 142 and starts driving the pressurizing pump 141. As a result, air is sent into the compression air bag 30 and light compression of the wrist 200 is started by the compression air bag 30 (step S302). Pressurization of the compression bladder 30 using the pressurization pump 141 is performed until the compression bladder 30 reaches a predetermined internal pressure at which the radial artery 212 can be slightly compressed. In addition, after the said pressurization, the internal pressure of the air bag 30 for compression is maintained, and the light compression state of the wrist 200 is maintained.

  Next, the CPU 130 starts driving the light emitting element 61 via the light emitting element driving circuit 121 (step S303). 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 S304), and sends this to the CPU 130. input. CPU130 acquires a volume pulse wave based on the input voltage signal (step S305). The acquired volume pulse wave is stored in the memory unit 170 as a measurement result (step S306), and then displayed on the display unit 160 (step S307). Here, the display unit 160 displays the volume pulse wave as, for example, a waveform.

  The series of operations from Step S304 to Step S307 is repeatedly performed until a predetermined stop condition (for example, input of a measurement stop command by a subject, elapse of a set time by a timer circuit, etc.) is satisfied (Step S304). In the case of NO in S308). When a predetermined stop condition is satisfied (in the case of YES in step S308), CPU 130 issues a command for releasing driving of light emitting element 61 to light emitting element drive circuit 121 and a command for opening exhaust valve 142. Put out. Thereby, the drive of the light emitting element 61 is stopped (step S309), the air in the compression air bag 30 is exhausted, and the light compression state is released (step S310). Pulse wave meter 100D is in a standby state, and waits for an input of a power-off command from operation section 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.

  Even when the cuff 10G in the present embodiment described above is used, the same effect as that in the case of the cuff 10A in the first embodiment described above can be obtained. That is, when the cuff 10D is attached to the wrist 200 and the blood pressure value is measured, the curler 12 as an addressing member can be uniformly tightened toward the wrist 200 in the circumferential direction. The compression force of 30 can be efficiently applied to the radial artery 212 that is a compression target, and the radial artery 212 can be more uniformly compressed in the circumferential direction. Therefore, by using the cuff 10G having the above-described configuration, it is possible to make it difficult to cause a shortage of compression force on the radial artery 212. It becomes possible to measure the volume pulse wave.

  Further, in the case of the cuff 10G having the above configuration, as described above, the wrist 200 can be uniformly tightened in the circumferential direction by the curler 12 as the addressing member, so that the photoelectric sensor as the volume pulse wave detection means It is possible to prevent an unexpected inclination from occurring. Therefore, by using the pulse wave meter 100D including the cuff 10G having the above configuration, the volume pulse wave can be measured with high accuracy.

  In the embodiment of the present invention described above and the modification thereof, the case where the insertion hole (or opening) through which the tightening belt is inserted is formed not only at one end of the addressing member but also at the other end. However, it is not always necessary to provide such an insertion hole (or opening) at the other end.

  Further, in the above-described embodiment of the present invention 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. Other fixing means such as band-like cuff bands, binding bands, and ratchet belts can be used, and the winding length can be adjusted according to the circumference of the wrist to be worn, and the mounting state can be ensured. Anything that can be maintained can be used.

  Further, in the above-described third embodiment of the present invention, the case where the photoelectric sensor is provided inside the compression air bag has been described as an example, but in addition to this, the photoelectric sensor is provided on the inner surface side of the addressing member. Or a photoelectric sensor may be attached to the surface of 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.

  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 pulse wave that measures volume pulse waves. Although the present invention has been described with reference to a meter, the present invention can naturally be applied to a blood pressure information measuring 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 in Embodiment 1 of this invention. It is a figure which shows the state which mounted | wore the wrist in Embodiment 1 of this invention, and is sectional drawing which shows the state before inflating the compression air bag. It is a figure which shows the state which mounted | wore the wrist in Embodiment 1 of this invention, and is sectional drawing which shows the state after inflating the compression air bag. 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 structure of the functional block of the sphygmomanometer in Embodiment 2 of this invention. It is a figure which shows the state which mounted | wore the wrist in Embodiment 2 of this invention, and is sectional drawing which shows the state before inflating the compression air bag. It is a figure which shows the state which mounted | wore the wrist with the cuff in Embodiment 2 of this invention, and is sectional drawing which shows the state after inflating the compression air bag. It is a flowchart which shows the flow of the measurement process of the blood pressure value of the sphygmomanometer in Embodiment 2 of this invention. It is a block diagram which shows the other structural example of the functional block of the sphygmomanometer in Embodiment 2 of this invention. It is a block diagram which shows the structure of the functional block of the pulse wave meter in Embodiment 3 of this invention. It is a figure which shows the state which mounted | wore the wrist in Embodiment 3 of this invention, and is sectional drawing which shows the state after inflating the compression air bag. It is a flowchart which shows the flow of the measurement process of the volume pulse wave of the pulse wave meter in Embodiment 3 of this invention.

Explanation of symbols

  10A to 10G cuff, 11 exterior cover, 12 curler, 12a one end, 12a1 insertion hole, 12b other end, 12b1 insertion hole, 12c mounting portion, 12c1 fixing hole, 13, 14 split curler, 13a, 14a one end, 13b, 14b The other end part, 15a-15c Ring-shaped member, 15c1 Mounting part, 16 Cloth member, 16a One end part, 16b The other end part, 16c Fixing part, 17 Freely deformable member, 17a-17c parts, 17a1, 17b1 Insertion hole 17c1 Mounting part, 20 Clamping belt, 20a One end part, 20b Other end part, 24-face fastener, 30 Compression air bag, 40 Pressing air bag, 60 Photoelectric sensor, 61 Light emitting element, 62 Light receiving element, 81, 82 Air Tube, 100A to 100C Sphygmomanometer, 100D Pulse wave meter, 110 body, 121 Light emitting element drive Road, 122 Light reception amount detection circuit, 140,150 Air system component, 141,151 Pressurization pump, 142,152 Exhaust valve, 143,153 Pressure sensor, 145,155 Pressurization 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 power supply unit, 190 operation unit, 200 wrist, 210 rib, 212 radial artery, 220 ulna, 222 ulnar artery, 230 Tendon.

Claims (12)

A cuff for a blood pressure information measuring device used by being worn on the wrist to measure blood pressure information,
A compression fluid bag disposed so as to cover both the wrist surface where the radial artery is located and the wrist surface where the ulnar artery is located and straddle the wrist surface where the tendon is located in the mounted state; ,
In the mounted state, an addressing member located outside the compression fluid bag and addressed along the wrist;
In a mounted state, the tightening belt that tightens the addressing member toward the wrist, thereby pressing the fluid bag for compression toward the wrist;
Fixing means for maintaining the state where the addressing member is tightened by the tightening belt,
The fastening belt has one end in the longitudinal direction fixed to the addressing member in a portion addressed between the wrist surface where the radial artery is located and the wrist surface where the ulnar artery is located in the attached state. Has been
The addressing member has a hook portion capable of hooking the fastening belt at one end portion in a circumferential direction,
The fastening belt is folded by being hooked on the hook portion in a state of covering the portion near the other end in the circumferential direction of the addressing member, and the fastening belt of the portion where the folded portion is not folded. A cuff for a blood pressure information measuring device, wherein the addressing member can be tightened by the tightening belt by being fixed by the fixing means.   The blood pressure information measuring device cuff according to claim 1, wherein the addressing member has an insertion hole through which the fastening belt is inserted at the other end portion in the circumferential direction.   The blood pressure information measuring device cuff according to claim 1, wherein the addressing member includes a curved elastic plate configured to be elastically deformable in a radial direction.   The addressing member is configured by arranging a plurality of parts having substantially the same shape in the circumferential direction, and connecting adjacent parts among the plurality of parts arranged in the circumferential direction so as to be rotatable. The cuff for a blood pressure information measurement device according to claim 1 or 2, comprising a freely deformable member.   The cuff for a blood pressure information measuring device according to claim 1 or 2, wherein the addressing member includes a cloth band-shaped member that does not have elasticity in the longitudinal direction.   The blood pressure information measuring device cuff according to any one of claims 1 to 5, wherein the fixing means includes a hook-and-loop fastener provided on the tightening belt.   The cuff for a blood pressure information measuring device according to any one of claims 1 to 6, wherein the hook portion is configured by providing an insertion hole through which the fastening belt is inserted in the one end portion of the addressing member. .   The cuff for a blood pressure information measuring device according to any one of claims 1 to 6, wherein the hook portion is configured by a ring-shaped member attached to the one end portion of the addressing member.   In the mounted state, the member is disposed between the fastening belt and the portion near the other end of the addressing member, and presses the portion near the other end of the addressing member toward the wrist by expanding. The cuff for a blood pressure information measuring device according to any one of claims 1 to 8, further comprising a pressing fluid bag.   In a mounted state, a light emitting unit that emits light toward one of the living tissue of the portion where the radial artery is located and the living tissue of the portion where the ulnar artery is located, and a light receiving portion that receives the light after passing through the living tissue The blood pressure information measurement device cuff according to claim 1, further comprising a photoelectric sensor that 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 9,
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 10,
A driving unit for causing the light emitting unit to emit light;
A received light amount detector for detecting 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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