WO2008029616A1

WO2008029616A1 - Pulse wave measuring instrument

Info

Publication number: WO2008029616A1
Application number: PCT/JP2007/066241
Authority: WO
Inventors: Masao Hashimoto
Original assignee: Omron Healthcare Co., Ltd.
Priority date: 2006-09-07
Filing date: 2007-08-22
Publication date: 2008-03-13
Also published as: TW200816958A; JP2008061830A

Abstract

A pulse wave measuring instrument (1) has a placement base (10) capable of holding the position of a user's wrist (52) placed thereon, a rotating arm (18) rotatably fitted to the placement base (10) so as to be able to hold the wrist (52) between itself and the placement base (10) with the wrist (52) placed on the placement base (10), and a pulse wave detection part (20) provided on the rotating arm (18) and detecting a pulse wave by being pressed against the surface of the wrist (52) placed on the placement base (10). The user's wrist can be easily installed on the pulse wave measuring instrument, and the instrument can accurately measure a pulse wave.

Description

Specification

Pulse wave measuring device

Technical field

TECHNICAL FIELD [0001] The present invention relates to a pulse wave measurement device that measures periodic fluctuations in internal pressure of an artery, and more specifically, by pressing a pulse wave detection unit against the wrist surface, the artery located under the wrist The present invention relates to a pressure-type pulse wave measuring device that measures a pulse wave.

Background art

[0002] Measuring the pulse wave of a subject is very important for knowing the health status of the subject. In recent years, it has been frequently performed to measure changes in cardiac load and arterial stiffness by measuring a subject's pulse wave. A pressure-type pulse wave measurement device measures the internal pressure fluctuation of the radial artery located in a relatively shallow area under the wrist by non-invasively measuring the pulse wave detection unit including a sensor against the wrist surface. is there.

[0003] In order to accurately measure a pulse wave, it is necessary that the pulse wave detector is pressed to an appropriate position on the wrist and the posture of the wrist is stably held during the measurement. For this reason, in the press-type pulse wave measuring device, in order to stably hold the posture of the subject's wrist, some kind of wrist holder is provided, and the pulse wave detector is pressed to an appropriate position on the wrist. In some cases, some positioning mechanism is provided.

[0004] As a pulse wave measuring device equipped with the wrist holder and positioning mechanism, for example, those disclosed in Japanese Patent Application Laid-Open No. 11-33007 (Patent Document 1) are disclosed in Japanese Patent Application Laid-Open No. 2005-87483 (Patent Document 2). There are disclosures. In the pulse wave measuring device disclosed in Patent Document 1, a plate-like member addressed across from the portion corresponding to the back side of the wrist to the forearm, and a belt-like member attached to the plate-like member, The wrist posture is stably held by the sensor, and the detection unit including the pulse wave detection unit is attached to the wrist using a fastening band attached to a separate plate member. Yes. In addition, the pulse wave measuring device disclosed in Patent Document 2 is configured so that the posture of the wrist is stably held by the mounting table for mounting the wrist, and the tightening band attached to the mounting table. A detection unit including a pulse wave detection unit is attached to the wrist using It is configured as follows.

[0005] In addition to the above, a wrist holder for holding the posture of the wrist is provided! /, NA! /, A positioning mechanism for causing the pulse wave detector of the object to be pressed to an appropriate position on the wrist There is a pulse wave measuring device disclosed in International Publication WO00 / 49943 (Patent Document 3). In the pulse wave measuring device disclosed in Patent Document 3, an arm that can slide is provided in a mount mechanism for placing a wrist, and a pulse wave detector is provided so as to be movable in the longitudinal direction of the arm. The pulse wave detector is configured to be able to be pressed at an appropriate position on the wrist placed on the mount mechanism.

Patent Document 1: Japanese Patent Laid-Open No. 11 33007

Patent Document 2: JP 2005-87483 A

Patent Document 3: International Publication WO00 / 49943 Pamphlet

Disclosure of the invention

Problems to be solved by the invention

[0006] However, in the pulse wave measuring devices disclosed in Patent Documents 1 and 2, the wrist posture is stably maintained, but the detection unit is positioned while adjusting the tightening band, and the wrist is measured. It is necessary to wear it, and the wearing work becomes very complicated. In contrast, in the pulse wave measuring device disclosed in Patent Document 3, the pulse wave detection unit is relatively easily positioned on the wrist by operating an arm attached to the mount mechanism so as to be slidable. While it is possible to press the wrist, the wrist posture is not stably maintained, and thus there is a possibility that the measurement accuracy is lowered due to a positional deviation during the measurement. Further, in the pulse wave measuring device disclosed in Patent Document 3, positioning is easier than when using a tightening band, but positioning is performed by moving the detection unit in the longitudinal direction of the arm while moving the arm. Therefore, it cannot always be said that sufficient positioning has been facilitated. Therefore, even if the pulse wave measuring device disclosed in Patent Document 3 is moved, it is still extremely difficult to press the pulse wave detecting unit at an appropriate position on the wrist. The

[0007] Therefore, the present invention has been made to solve the above-described problems, and an object thereof is to provide a pulse wave measuring device that is easy to wear and can accurately measure a pulse wave. Means for solving the problem

[0008] The pulse wave measuring device according to the present invention includes a placing table that can maintain the posture of the wrist by placing the wrist, and the wrist while the wrist is placed on the placing table. A pivot arm that is pivotally attached to the mount table so as to be sandwiched between the mount table and a wrist that is provided on the pivot arm and placed on the mount table. And a pulse wave detection unit that detects a pulse wave by being pressed against the surface.

With this configuration, the wrist can be stably sandwiched between the mounting table and the rotating arm, so that the pulse wave can be easily mounted and can measure the pulse wave with high accuracy. It can be a measuring device.

[0010] In the pulse wave measurement device according to the present invention, the rotation axis of the rotation arm extends in a direction parallel to the axial direction of the wrist mounted on the mounting table. Preferably, it is preferably disposed in a portion located on the side of the wrist when the wrist is placed on the mounting table.

With this configuration, the wrist can be sandwiched between the mounting table and the rotating arm with good operability.

[0012] In the pulse wave measuring device according to the present invention described above, the above-mentioned mounting table is such that the portion corresponding to the palm side of the wrist faces upward while the wrist is placed on the above-mentioned mounting table and the wrist Have a wrist holder that includes a hollow groove that can hold the wrist in an inclined position so that the radius side end is positioned above the ulna side end of the wrist! Power S preferred.

[0013] By configuring in this way, in the state where the wrist is placed on the mounting table, the measurement site of the wrist in which the pulsation of the rib vein is prominent can be made horizontal, and the pulse wave detection It is possible to maintain the parallelism between the pressing surface of the protruding portion and the site to be measured, and the radial artery is in a state where the wrist is placed on the placing table regardless of the size of the wrist of the subject. The force S can be set so that the position where the pulse wave detector is placed and the position where the pulse wave detector is placed are almost the same. Therefore, it is possible to provide a pulse wave measuring device that can be easily mounted and can accurately measure the pulse wave.

[0014] In the pulse wave measuring device according to the present invention, the wrist holder is provided on the mounting table. In such a case, it is preferable that the wrist holding part is attached to the mounting table in the state corresponding to the holding of the wrist of the left hand or the holding of the wrist of the right hand. It's a configuration that takes the difference!

[0015] By configuring in this way, it is possible to provide a convenient pulse wave measuring device that can employ either the left wrist or the right hand wrist as the measurement site.

[0016] The pulse wave measuring device according to the present invention further includes a maintenance mechanism that maintains the state in a state where the wrist placed on the mounting table is sandwiched between the rotating arm and the mounting table. It is preferable. In that case, in the state where the wrist placed on the mounting table is sandwiched between the rotating arm and the mounting table, the rotating arm moves away from the mounting table. It is preferable that it is comprised from the movement restriction member which restrict | limits moving to.

[0017] By configuring in this way, it is possible to maintain stable contact between the measurement site and the pulse wave detector during the measurement of the pulse wave, which enables highly accurate pulse wave measurement. It can be a pulse wave measuring device.

The invention's effect

[0018] According to the present invention, it is possible to use a pulse wave measuring device that is easy to wear and can accurately measure a pulse wave.

Brief Description of Drawings

FIG. 1A is a skeleton diagram of the vicinity of the left wrist as viewed from the palm side of the left hand.

FIG. 1B is a cross-sectional view of the wrist taken along line IB-IB in FIG. 1A.

FIG. 2 is an external view of a pulse wave measurement device when the wrist of the left hand is employed as a measurement site in the pulse wave measurement device according to one embodiment of the present invention.

FIG. 3 is an external view of the pulse wave measuring device when the wrist of the right hand is employed as a measurement site in the pulse wave measuring device according to one embodiment of the present invention.

FIG. 4 is a diagram showing functional blocks of a pulse wave measurement device according to one embodiment of the present invention.

FIG. 5 is a flowchart showing a processing procedure for pulse wave measurement in the pulse wave measurement device according to one embodiment of the present invention. FIG. 6 is a schematic perspective view for illustrating a procedure for setting the wrist of the left hand on the pulse wave measurement device according to one embodiment of the present invention.

FIG. 7 is a schematic perspective view showing a procedure for setting the wrist of the left hand on the pulse wave measuring device in one embodiment of the present invention.

FIG. 8 is a cross-sectional view at the time of pulse wave measurement performed after setting the wrist of the left hand in the pulse wave measurement device according to one embodiment of the present invention.

FIG. 9 is a schematic perspective view for illustrating a procedure for setting the wrist of the right hand on the pulse wave measurement device according to one embodiment of the present invention.

FIG. 10 is a schematic perspective view showing a procedure for setting the wrist of the right hand on the pulse wave measuring device in one embodiment of the present invention.

FIG. 11 is a cross-sectional view at the time of pulse wave measurement performed after the setting of the wrist of the right hand in the pulse wave measurement device according to one embodiment of the present invention.

Explanation of symbols

[0020] 1 pulse wave measuring device, 10 mounting table, 11 upper surface, 12 recess, 13a, 13b strut, 14 wrist holder, 15 groove, 16 shaft support, 18 rotating arm, 19 rotating shaft, 20 pulses Wave detector, 2 la, 21b surface fastener, 24 PC, 31 pressure cuff, 32 caro pressure pump, 33 negative pressure pump, 3 4 selector valve, 35 control circuit, 36 pressure sensor, 37 A / D converter, 38 pulse wave Sensor, 39 Multiplexer, 40 A / D converter, 41 CPU, 42 ROM, 43 RAM, 44 Operation section, 45 Display section, 51 Left hand, 51a Thumb, 51b Little finger, 52 Wrist, 52a Hand joint striated, 53 Forearm , 56 radius, 56a radial styloid, 57 ulna, 57a ulnar styloid, 58 radial artery, 61 right hand, 62 wrist, 62a wrist joint striated, 63 forearm, 6 6 radius, 67 ulna, 68 radial artery, 100 measurement site.

BEST MODE FOR CARRYING OUT THE INVENTION

First, referring to FIG. 1, the structure near the wrist of a human body will be described, and terms used in this specification will be defined. Fig. 1A is a skeleton diagram of the vicinity of the left wrist viewed from the palm side of the left hand, and Fig. 1B is a cross-sectional view of the wrist along the line IB-IB in Fig. 1A. 1B is a view of the wrist cross section when viewed from the central side toward the distal side. As shown in FIGS. 1A and IB, a radius 56 and an ulna 57 are located inside a wrist 52 located between the hand 51 and the forearm 53. The radius 56 and the ulna 57 extend in parallel from the elbow to the wrist 52. The radius 56 is located in the forearm 53 of the hand 51 corresponding to the thumb 51a side, and the ulna 57 is located in the forearm 53 of the hand 51 corresponding to the little finger 51b side. Inside the wrist 52, the ends of the radius 56 and the ulna 57 are located. The ends of the radius 56 and the ulna 57 have projection portions called a radius styloid process 56a and an ulnar styloid process 57a, respectively. Further, a radial artery 58 is located between the rib 56 and the skin of the wrist 52 corresponding to the palm side of the hand 51. The radial artery 58 extends in substantially the same direction as the radial 56 extends. In addition, on the skin of the wrist 52 corresponding to the palm side of the hand 51, a front joint striated pattern 52a is located. The wrist joint front horizontal pattern 52a extends in the circumferential direction of the wrist 52.

In this specification, as shown in FIG. 1B, the portion of the wrist 52 on the side where the radius 56 is located is referred to as the “radial side portion of the wrist 52” and the portion on the side of the wrist 52 where the ulna 57 is located. This is called “the ulna side of the wrist”. Of the boundary on the body surface between the portion corresponding to the palm side of the hand 51 of the wrist 52 and the portion corresponding to the back side of the hand 51 of the wrist 52, the portion located on the body surface of the rib side portion of the wrist 52 Is referred to as the “radial side end”, and the portion of the wrist 52 that is positioned on the body surface of the ulna side portion is referred to as the “ulna side end”. In the figure, the radius side end is designated P.

A

The end of the ulna is indicated by the symbol P.

B

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In one embodiment shown below, a pulse wave measuring device configured to be able to use both the wrist of the left hand and the wrist of the right hand as a measurement site for pulse wave measurement. An explanation is given by way of example.

2 and 3 are diagrams showing an external structure of the pulse wave measuring device according to one embodiment of the present invention, and FIG. 2 is a pulse wave when the wrist of the left hand is adopted as a measurement site. Fig. 3 is an external view of the pulse wave measurement device when the wrist of the right hand is used as the measurement site. First, with reference to these FIG. 2 and FIG. 3, the external structure of the pulse wave measuring device in the present embodiment will be described.

As shown in FIG. 2 and FIG. 3, the pulse wave measuring device 1 in the present embodiment is a tape recorder. It has a mounting table 10 that is mounted on a mounting surface such as. The mounting table 10 has a flat, substantially rectangular parallelepiped outer shape, and an upper surface 11 of the mounting table 10 is gently inclined to the front side (subject side).

) Is formed in such a way that the height is gradually increased with the directional force toward the back side. A concave portion 12 for receiving the forearm is provided at a predetermined position on the upper surface 11 of the mounting table 10. The recess 12 has a gently curved shape so that the forearm can be easily fitted.

A wrist holding portion 14 for holding the wrist is positioned on an extension line in the extending direction of the concave portion 12 of the mounting table 10. The wrist holding unit 14 is formed of a member separate from the mounting table 10 and is detachably attached to the mounting table 10. More specifically, the wrist holding portion 14 is configured so that it can be fitted into the guide rails of the column portions 13a and 13b provided on the mounting table 10 by providing a guide groove on the side surface thereof. It is configured to be mounted on the mounting table 10 in two states rotated by 180 °.

[0028] The upper surface of the wrist holding portion 14 is provided with a recess-shaped groove 15 that can receive the wrist corresponding to the back side of the hand. The groove 15 is formed asymmetrically in the direction intersecting the wrist axial direction when the wrist is received (that is, each of the left and right inclined surfaces of the groove 15 that is gently curved and inclined). The curvature of the left hand is held in each of the two states above, and the state force corresponding to holding the right hand wrist or the state corresponding to holding the wrist of the left hand! Power S can be. 2 is a view showing a state in which the wrist holding portion 14 is attached to the mounting table 10 so as to be in a state suitable for receiving the wrist of the left hand, and FIG. 3 is suitable for receiving the wrist of the right hand. FIG. 4 is a view showing a state in which the wrist holding portion 14 is attached to the mounting table 10 so as to be in a state where

A rotating arm 18 is attached to a predetermined position on the upper surface 11 of the mounting table 10. Specifically, a shaft support 16 protrudes upward from the upper surface 11 of the mounting table 10 on the left side of the position where the wrist holding portion 14 of the mounting table 10 is attached. A rotating shaft 19 provided at one end in the longitudinal direction of the rotating arm 18 is supported. As a result, the pivot arm 18 pivots with respect to the mounting table 10 in the direction of the arrow R in the figure with the rotating shaft 19 as the central axis, and the wrist is placed on the mounting table 10 while the wrist is mounted. It is configured to be able to be sandwiched between the mounting table 10. Here, the rotating shaft 19 of the rotating arm 18 extends in a direction parallel to the axial direction of the wrist mounted on the mounting table 10. Be placed.

A pulse wave detector 20 is provided at a predetermined position on the lower surface of the rotating arm 18. The pulse wave detection unit 20 includes a pulse wave sensor 38 (see FIG. 4) for detecting the pulse wave and a press cuff 31 (see FIG. 4) for pressing the pulse wave sensor 38 toward the wrist. I have. As the pulse wave sensor 38, for example, a pressure sensor having a capacitance element, a pressure sensor having a strain resistance element, an impedance measurement sensor capable of measuring bioimpedance, and the like can be used. Further, as the pressing cuff 31, it is also possible to use a mechanical actuator such as a motor or a solenoid in addition to a force that can preferably use a fluid bag into which gas or liquid can be introduced.

[0031] A surface fastener 21a is attached to the other end in the longitudinal direction of the rotary arm 18, and a surface fastener 21b that engages with the surface fastener 21a is attached to a predetermined position on the side surface of the mounting table 10. It has been. These hook-and-loop fasteners 21a and 21b can be locked by contacting each other, and the state is maintained when the wrist placed on the mounting table 10 is sandwiched between the rotating arm 18 and the mounting table 10. Functions as a maintenance mechanism. More specifically, the hook-and-loop fasteners 21a and 21b are configured so that the rotating arm 18 is a force away from the mounting table 10 when the wrist mounted on the mounting table 10 is sandwiched between the rotating arm 18 and the mounting table 10. It functions as a movement restricting member that restricts movement in the direction of movement, thereby maintaining an appropriate pressing state of the pulse wave detecting unit 20 against the wrist.

Note that an input / output terminal is provided at a predetermined position on the front surface of the mounting table 10, and a PC (Personal Computer) as an external terminal is connected to the terminal, for example.

FIG. 4 is a diagram showing functional blocks of the pulse wave measurement device according to one embodiment of the present invention. In FIG. 4, a PC as an external terminal of the pulse wave measuring device is also shown. Next, a functional block of the pulse wave measurement device according to the present embodiment will be described with reference to this figure.

As shown in FIG. 4, the pulse wave detection unit 20 includes a pulse wave sensor 38 and a signal extraction unit for selectively deriving a plurality of voltage signals output from the pulse wave sensor 38 by time division multiplexing. And a pressing cuff 31 that is pressure-adjusted to press the pulse wave sensor 38 against the wrist. The mounting table 10 includes a pressurizing pump 32 for increasing the internal pressure of the pressing cuff 31 (hereinafter also referred to as cuff pressure), a negative pressure pump 33 for decreasing the internal pressure, and a pressurizing pump. A switching valve 34 for selectively connecting any one of 32 and negative pressure pump 33 to the pressure cuff 31, and a control circuit 3 for controlling the operation of the pressure pump 32, the negative pressure pump 33 and the switching valve 34 3 5, a pressure sensor 36 for detecting the pressure in the pressure cuff 31, an A / D converter 37 for converting an analog signal derived from the pressure sensor 36 into a digital signal, and a pulse wave detection unit 20 An A / D comparator 40 for converting an analog signal into a digital signal is provided.

[0036] The PC 24 is a CPU (Central Processing Unit) 41 as an arithmetic processing unit that executes various arithmetic processes including arithmetic operations in order to centrally control the pulse wave measuring device, and for controlling the pulse wave measuring device. ROM (Read Only Memory) 42 and RAM (Random Access Memory) 43 for storing data and programs, an operation unit 44 that can be operated from the outside and operated to input various information, and a pulse wave In order to externally output various information such as measurement results, it has a display unit 45 such as an LCD.

FIG. 5 is a flowchart showing a processing procedure for pulse wave measurement in the pulse wave measurement device according to one embodiment of the present invention. Next, the processing procedure of the pulse wave measuring apparatus in the present embodiment will be described with reference to this figure. Note that the program according to this flowchart and the data to be referred to when this program is executed are stored in the ROM 42 or RAM 43 in advance, and the CPU 41 reads out and executes the program while referring to this data as needed, so that the pulse wave measurement process is performed. proceed.

[0038] As shown in FIG. 5, when a power switch (not shown) is turned ON, the CPU 41 instructs the control circuit 35 to drive the negative pressure pump 33, and the control circuit 35 responds to this instruction. Based on this, the switching valve 34 is switched to the negative pressure pump 33 side to drive the negative pressure pump 33 (step Sl). When the negative pressure pump 33 is driven, the cuff pressure acts to be sufficiently lower than the atmospheric pressure via the switching valve 34, so that the pulse wave sensor 38 moves upward in the pulse wave detection unit 20. As a result, it can be avoided that the pulse wave sensor 38 protrudes carelessly and malfunctions or breaks down.

[0039] Next, the subject wears the pulse wave detection unit 20 on the wrist in the posture shown in Fig. 7 and Fig. 8 or Fig. 10 and Fig. 11 described later. When the start button (not shown) is turned on, U41 instructs the control circuit 35 to drive the pressure pump 32. Accordingly, the control circuit 35 switches the switching valve 34 to the pressurizing pump 32 side based on this instruction and drives the pressurizing pump 32 (step S2). Along with this operation, the cuff pressure rises, and the pulse wave sensor 38 descends toward the wrist and is pressed against the surface of the wrist that is the measurement site.

When pulse wave sensor 38 is pressed against the wrist surface, cuff pressure information is derived from pressure sensor 36, converted to digital information by A / D converter 37, and applied to CPU 41. At the same time, the pulse wave signal obtained from the pulse wave sensor 38 is also converted into digital information by the A / D converter 40 via the multiplexer 39 and given to the CPU 41. Based on the digital information, the CPU 41 determines whether or not the conditions for pulse wave detection are satisfied (step S3). If the conditions for pulse wave detection are satisfied (YES in step S3), the pressure level applied to the measurement site of the pulse wave sensor 38 by the pressure cuff 31 becomes the optimum level for pulse wave detection. As described above, the output of the pressurizing pump 32 is adjusted (step S4). Under optimal pressure adjustment for the pressure cuff 31, pressure information output by the pulse wave sensor 38, that is, the waveform data of the radial artery pulse wave, is sent to the CPU 41 via the multiplexer 39 and the A / D converter 40. Transferred (step S5).

The CPU 41 receives the waveform data and detects a pulse wave based on the received waveform data. The pulse wave data transfer process in step S5 is repeated until the waveform data is received and it is determined that the predetermined condition for completion of pulse wave detection is satisfied. Since the pulse wave detection process based on the received waveform data follows a known procedure, the details are omitted here. When the predetermined condition for ending the pulse wave detection is satisfied (YES in step S6), the CPU 41 controls to drive the negative pressure pump 33 via the switching valve 34 (step S7). As a result, the pressure state of the pulse wave sensor 38 on the wrist is released, and the series of pulse wave detection processing ends.

The CPU 41 outputs the detected pulse wave information to the outside via the display unit 45 or the like. The pulse wave information is used to calculate AI (Augmentation Index), and the calculated AI is output.

FIG. 6 and FIG. 7 are schematic perspective views for illustrating a procedure for setting the wrist of the left hand in the pulse wave measuring device according to one embodiment of the present invention. Next, with reference to these drawings, a procedure for setting the wrist of the left hand in the pulse wave measurement device according to the present embodiment will be described. [0044] First, the pulse wave measuring device 1 is placed on a placement surface such as a table, and the wrist holding portion 14 is oriented so that the wrist holding portion 14 is suitable for the wrist of the left hand, and the wrist is held. Mount part 14 on mounting base 10. Subsequently, as shown in FIG. 6, a forearm 53 that is hung from the elbow to the wrist 52 is placed on the recess 12 provided on the upper surface 11 of the placing table 10. At this time, the wrist 52 corresponding to the back side of the hand 51 is positioned and arranged in the groove 15 of the wrist holding portion 14. More specifically, the wrist joint front lateral pattern 52 a of the wrist 52 is used as a mark, and the wrist joint front lateral pattern 52 a is positioned slightly behind the groove 15. As a result, the measurement site 100 where the pulsation of the radial artery is noticeable on the skin is located on the groove 15.

Here, in the pulse wave measuring device 1 according to the present embodiment, the groove 15 of the wrist holding portion 14 is formed so as to be suitable for the wrist of the left hand as described above. As shown in Fig. 7, when the wrist 52 of the left hand is placed on the mounting table 10, the part corresponding to the palm side of the hand 51 faces upward and the radius side end P of the wrist 52 is the ulna side of the wrist 52. Than edge P

A B

The wrist holding unit 14 holds the wrist 52 in an inclined posture so as to be positioned above. Therefore, the measurement site 100 where the above-described radial artery pulsation appears remarkably on the skin is maintained in a substantially horizontal state.

Next, as shown in FIG. 7, the rotating arm 18 is rotated toward the mounting table 10, and the wrist 52 placed on the wrist holding portion 14 of the mounting table 10 is turned into the rotating arm 18. The pulse wave detection unit 20 provided on the lower surface of the rotating arm 18 is brought into contact with the measurement site 100 so that it is sandwiched by the mounting table 10. At this time, if the above positioning is insufficient, the positions of the forearm 53 and the wrist 52 placed in the recess 12 are finely adjusted so that the pulse wave detection unit 20 comes into contact with the measurement site 100. Subsequently, the surface fastener 21 a attached to the rotating arm 18 is locked to the surface fastener 21 b attached to the mounting table 10, and the rotating arm 18 is fixed to the mounting table 10 so as not to move.

[0047] FIG. 8 is a cross-sectional view of the pulse wave measurement device according to one embodiment of the present invention, in the case of pulse wave measurement performed after setting the wrist of the left hand. Next, with reference to this figure, a description will be given of a mechanism that makes it easy to wear and can accurately measure a pulse wave by adopting the configuration of the pulse wave measuring device according to the present embodiment. [0048] As described above, in the pulse wave measurement device 1 according to the present embodiment, the groove 15 of the wrist holding portion 14 is bent into a predetermined curved shape, and therefore, as shown in FIG. The wrist so that the radius side end P of the wrist 52 is positioned above the ulna side end P of the wrist 52 of the left hand

A B

52 will be held in an inclined position. Here, the size of the wrist is a force S that varies depending on gender and age, and the position of the radial artery in the wrist does not change much even if the wrist size is different. Therefore, assuming that the wrist size has changed to a similar shape, the possible positions of the radial artery 58 of the wrist 52 of the left hand placed on the placing table 10 are any of the straight lines A shown in FIG. It becomes the position. Note that the straight line A is in a state where the upper end of the straight line A is slightly inclined toward the rotating shaft 19 side with respect to the horizontal line H shown in FIG.

[0049] In contrast, in pulse wave measurement device 1 according to the present embodiment, rotation arm 18 is rotatably provided on mounting table 10 on which wrist 52 is mounted. A pulse wave detector 20 is provided at a predetermined position. Therefore, the pulse wave detection unit 20 takes any position on the arcuate curve L shown in FIG.

Here, as can be seen from FIG. 8, as long as the radial artery 58 is arranged above the horizontal line H passing through the rotation axis 19, the straight line A on which the radial artery 58 is arranged and the pulse wave detection unit The curve L, which is the locus of the positions that 20 can take, almost matches. That is, by adjusting the attachment position of the wrist holder 14 with respect to the mounting table 10, the radial artery 58 is disposed at the same position as or higher than the rotational shaft 19 when the wrist 52 has the smallest cross section within the assumed range. If it is set so that the wrist 52 is placed on the mounting table 10 in the correct wearing posture, the pulse wave detection unit 20 generally shows the pulsation of the radial artery 58 on the skin! It will be positioned at the part to be measured 100 (see Fig. 6). Therefore, if this configuration is adopted, it is possible to provide a pulse wave measuring device that can be easily mounted and can accurately measure a pulse wave.

[0051] In addition, as described above, since the measurement site 100 (see FIG. 6) is kept almost horizontal when the wrist 52 of the left hand is placed on the placement table 10, the pulse wave detection unit The parallelism between the 20 pressing surfaces and the measurement site 100 can be maintained, and high-accuracy pulse wave measurement becomes possible. FIG. 9 and FIG. 10 are schematic perspective views for illustrating a procedure for setting the wrist of the right hand on the pulse wave measurement device according to one embodiment of the present invention. Next, with reference to these drawings, a procedure for setting the wrist of the right hand on the pulse wave measurement device according to the present embodiment will be described.

[0053] First, the pulse wave measuring device 1 is placed on a placement surface such as a table, and the wrist holding unit 14 is oriented so that the wrist holding unit 14 is suitable for the wrist of the right hand. Mount part 14 on mounting base 10. Subsequently, as shown in FIG. 9, a forearm 63 hung from the elbow to the wrist 62 is placed on the recess 12 provided on the upper surface 11 of the placing table 10. At this time, the wrist 62 corresponding to the back side of the hand 61 is positioned and disposed in the groove 15 of the wrist holding portion 14. More specifically, the wrist joint front striation 62 a of the wrist 62 is used as a mark, and the wrist joint front striation 62 a is positioned slightly behind the groove 15. As a result, the measurement site 100 where the pulsation of the radial artery is noticeable on the skin is located on the groove 15.

[0054] Here, in pulse wave measuring apparatus 1 according to the present embodiment, groove 15 of wrist holding portion 14 is formed so as to be in a state suitable for the wrist of the right hand as described above. As shown in Fig. 10, when the wrist 62 of the right hand is placed on the mounting table 10, the part corresponding to the palm side of the wrist 62 faces upward and the radius side end P of the wrist 62 is the ulna side end of the wrist 62. From part P

A B

The wrist holder 14 holds the wrist 62 in an inclined posture so that the wrist 62 is also positioned above. Therefore, the measurement site 100 where the above-described pulsation of the radial artery is noticeable on the skin is maintained in a substantially horizontal state.

Next, as shown in FIG. 10, the rotating arm 18 is rotated toward the mounting table 10, and the wrist 62 mounted on the wrist holding portion 14 of the mounting table 10 is connected to the rotating arm 18. The pulse wave detection unit 20 provided on the lower surface of the rotating arm 18 is brought into contact with the measurement site 100 so as to be sandwiched between the mounting table 10. At this time, if the above-mentioned positioning is insufficient, the position of the forearm 63 placed in the recess 12 is finely adjusted so that the pulse wave detection unit 20 contacts the measurement site 100. Subsequently, the hook-and-loop fastener 21 a attached to the rotating arm 18 is locked to the hook-and-loop fastener 21 b attached to the mounting table 10, and the rotating arm 18 is fixed so as not to move with respect to the mounting table 10. FIG. 11 is a cross-sectional view at the time of pulse wave measurement performed after setting the wrist of the right hand in the pulse wave measurement device according to one embodiment of the present invention. Next, with reference to this figure, a description will be given of a mechanism that makes it possible to mount the pulse wave easily and accurately by adopting the configuration of the pulse wave measuring device according to the present embodiment.

[0057] As described above, in pulse wave measuring apparatus 1 according to the present embodiment, since groove 15 of wrist holding portion 14 is bent into a predetermined curved shape, the right hand as shown in FIG. Hands so that the radial end P of wrist 6 2 is positioned above the ulnar end P of wrist 62 of the right hand

A B

The neck 62 will be held in an inclined position. Here, the size of the wrist of the right hand varies depending on the gender and age as well as the size of the wrist of the left hand, but the position of the radial artery in the wrist changes greatly even if the size of the wrist is different. Not what you want. Therefore, assuming that the wrist size has changed to a similar shape, the possible positions of the radial artery 68 of the right hand wrist 62 placed on the mounting table 10 are shown in FIG. On the straight line B! /, Either position. Note that the straight line B is in a state where the lower end of the straight line B is slightly inclined toward the rotating shaft 19 with respect to the horizontal line H shown in FIG.

In contrast, in the pulse wave measuring apparatus 1 according to the present embodiment, a rotating arm 18 is rotatably provided on the mounting table 10 on which the wrist 62 is mounted. A pulse wave detector 20 is provided at a predetermined position. Therefore, the pulse wave detection unit 20 takes any position on the arcuate curve L shown in FIG.

Here, as can be seen from FIG. 11, as long as the radial artery 68 is arranged below the horizontal line H passing through the rotation axis 19, the straight line B on which the radial artery 68 is arranged and the pulse wave detection unit The curve L, which is the locus of the positions that 20 can take, almost matches. That is, by adjusting the mounting position of the wrist holding portion 14 with respect to the mounting table 10, the radial artery 68 is disposed at the same position as the height of the rotation shaft 19 or higher when the wrist 62 has the largest cross section within the assumed range. If it is set to be low, the wrist 62 is placed on the mounting table 10 in the correct wearing posture, and the pulse wave detector 20 causes the radial artery 68 pulsation to appear on the skin! It will be positioned at the measurement site 100 (see Fig. 9). Therefore, by adopting this configuration, it is possible to provide a pulse wave measuring device that is easy to wear and can accurately measure a pulse wave. [0060] Further, as described above, since the measurement site 100 (see FIG. 9) is kept almost horizontal when the wrist 62 of the right hand is mounted on the mounting table 10, the pulse wave detection unit The parallelism between the 20 pressing surfaces and the measurement site 100 can be maintained, and high-accuracy pulse wave measurement becomes possible.

[0061] As described above, by adopting the configuration of the pulse wave measurement device according to the present embodiment, the measurement target is automatically measured regardless of whether the wrist of the left hand or the wrist of the right hand is employed as the measurement site. The pulse wave detector can be positioned and pressed at the site. Therefore, it is possible to achieve a pulse wave measuring device that achieves both easy installation and high accuracy.

[0062] In the pulse wave measurement device according to the present embodiment, the state in which the wrist of the left hand or the wrist of the right hand placed on the placing table is sandwiched between the placing table and the turning arm is the movement of the turning arm. Realized by the surface fastener, which is a limiting member, maintains stable contact between the measurement site and the pulse wave detector during pulse wave measurement, enabling highly accurate pulse wave measurement. .

[0063] It should be noted that in the embodiment of the present invention described above, a pulse wave measuring device configured such that both the wrist of the left hand and the wrist of the right hand can be employed as the measurement site. However, the pulse wave measuring device may adopt only one of the wrist of the left hand or the wrist of the right hand as the measurement site. In this case, the wrist holding part can be integrally provided on the mounting table.

[0064] As described above, the above-described embodiments disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the claims, and includes all modifications within the meaning and scope equivalent to the description of the claims.

Claims

The scope of the claims

[1] A placing table capable of maintaining the wrist posture by placing the wrist;

A pivot arm rotatably attached to the mounting table so that the wrist can be sandwiched between the mounting table and the wrist while the wrist is mounted on the mounting table; A pulse wave measuring device, comprising: a pulse wave detection unit that is provided on an arm and detects a pulse wave by being pressed against a surface of a wrist placed on the table.

[2] The pulse wave measuring device according to claim 1, wherein a rotation axis of the rotation arm extends in a direction parallel to an axial direction of a wrist placed on the mounting table. .

[3] The rotating shaft of the rotating arm is disposed in a portion positioned on the side of the wrist in a state where the wrist is placed on the mounting table. The described pulse wave measuring device.

[4] In the above table, when the wrist is placed on the table, the portion corresponding to the palm side of the wrist faces upward and the radius side end of the wrist is above the ulna side end of the wrist. 2. The pulse wave measuring device according to claim 1, further comprising a wrist holding portion including a recessed groove capable of holding the wrist in an inclined posture so as to be positioned.

[5] The wrist holding part is detachably attached to the mounting table, and the wrist holding part is in a state corresponding to holding of the wrist of the left hand or the wrist of the right hand when the wrist holding part is attached to the mounting table. 5. The pulse wave measuring device according to claim 4, which takes one of the states corresponding to holding.

[6] The pulse according to claim 1, further comprising a maintenance mechanism for maintaining the wrist placed on the mounting table in a state where the wrist is sandwiched between the rotating arm and the mounting table. Wave measuring device.

[7] The maintaining mechanism moves in a direction in which the rotating arm moves away from the mounting table in a state where the wrist mounted on the mounting table is sandwiched between the rotating arm and the mounting table. 7. The pulse wave measuring device according to claim 6, which also serves as a movement restricting member that restricts this.