JP4626593B2 - Wrist holder for pulse wave measuring device and pulse wave measuring device provided with the same - Google Patents

Description

  The present invention relates to a wrist support table for a pulse wave measuring device capable of holding the posture of a wrist in order to measure periodic internal pressure fluctuations of an artery located under the wrist, and a pulse wave measuring device including the wrist holding table. .

  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 grasp changes in cardiac load, arterial stiffness, and the like by measuring a subject's pulse wave. The pulse wave measuring device measures the internal pressure fluctuation of the radial artery located in a relatively shallow part of the wrist under a non-invasive manner by pressing a pulse wave detecting unit including a sensor or the like against the wrist surface.

  In order to accurately measure the pulse wave, it is necessary to stably maintain the wrist posture during the measurement. For this reason, in the pulse wave measuring device, a wrist holder for stably holding the posture of the wrist of the subject is often provided.

Examples of the pulse wave measuring apparatus provided with the wrist holder include those disclosed in JP-A-11-33007 (Patent Document 1) and those disclosed in JP-A-2005-87483 (Patent Document 2). is there. 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 maintained. In the pulse wave measuring device disclosed in Patent Document 2, the wrist posture is stably provided by the groove-shaped wrist holding portion provided on the upper portion of the holding base body placed on the placement surface such as a table. It is configured to be retained.
JP-A-11-33007 JP 2005-87483 A

  In the wrist holder disclosed in Patent Document 1, since the forearm and the hand are fixed to the plate-like member by the belt-like member, the posture of the wrist is reliably held. However, on the other hand, it is necessary to tighten the belt-shaped member against the forearm and the hand, and the mounting operation becomes very complicated. In particular, in order for the subject himself to fix the wrist to the wrist holder, the mounting work with one hand is forced, and the workability is significantly difficult.

  On the other hand, in the wrist holding base disclosed in the above-mentioned Patent Document 2, since the wrist posture is stably held only by applying the wrist to the wrist holding portion provided at the upper part of the holding base body, The work of fixing the wrist can be performed very easily. However, since it does not have a fastening tool like the band-shaped member described above, if the portion corresponding to the back side of the wrist is not correctly addressed to the surface of the groove of the wrist holding portion, the posture of the wrist is It is not in a state of being stably held, and is accompanied by a decrease in measurement accuracy.

  Therefore, the present invention has been made to solve the above-described problems, and is a pulse wave that is easy to wear and can stably hold the posture of the wrist and does not reduce the accuracy of pulse wave measurement. An object of the present invention is to provide a wrist holder for a measuring device and a pulse wave measuring device including the same.

A wrist holding base for a pulse wave measuring device according to the present invention is provided on a mounting base body mounted on a mounting surface and an upper part of the holding base main body, and holds the posture of the wrist by placing the wrist. A wrist holding portion including a recess-shaped groove that can be formed, and a wrist detecting portion that is provided in the wrist holding portion and detects whether or not the wrist is placed on the surface of the groove. The groove includes a central wrist support surface to which a central portion of the wrist is addressed when the wrist is placed on the wrist holding portion, and a distal side of the wrist when the wrist is placed on the wrist holding portion. And a distal wrist support surface to which the portion is addressed. The central wrist support surface and the distal wrist support surface are oriented in different directions so that the wrist can be held in a warped posture by being placed so that the wrist follows the surface of the groove. It is arranged facing. Each of the central wrist support surface and the distal wrist support surface is provided with at least one wrist detection unit.

With this configuration, it is possible to detect whether or not the wrist is correctly addressed to the surface of the groove of the wrist holding unit by the wrist detection unit, and whether or not the wrist holding state is suitable for measurement. Can be determined. Here, if the above configuration is adopted, it is possible to realize a state where the wrist is warped suitable for pulse wave measurement, and it is possible to reliably detect whether the state is reproduced by the wrist detection unit. become. Therefore, if the information is used, the wearing can be facilitated, or the subject can be encouraged to keep the wrist posture stably. Therefore, it is possible to effectively prevent a decrease in accuracy of pulse wave measurement.

  In the wrist holding base for the pulse wave measuring device according to the present invention, it is preferable that the wrist detecting unit is constituted by an optical sensor including a light projecting element and a light receiving element. Moreover, in the wrist holding base for the pulse wave measuring device according to the present invention, the wrist detecting unit may be constituted by a contact type micro switch.

  By comprising in this way, it becomes possible to detect accurately whether the wrist is correctly addressed to the surface of the groove | channel of a wrist holding part by the wrist detection part.

In the wrist holding base for the pulse wave measuring device according to the present invention, the groove extends in a direction along the circumferential direction of the wrist in a state where the wrist is placed on the wrist holding portion and supports the wrist on the central side. It is preferable that the surface has a ridge line which is a boundary between the peripheral wrist support surface and the distal wrist support surface, and in this case, the central wrist support surface and the distal wrist support surface are bordered by the ridge line. As described above, it is preferable to be configured so as to be inclined downward from each other in the axial direction of the wrist from the ridgeline .

  In the wrist holding table for the pulse wave measuring device according to the present invention, the groove corresponds to the palm side of the wrist in a state where the wrist is placed on the wrist holding portion, and the wrist It is preferable to have a shape that can hold the wrist in an inclined posture so that the radius side end is positioned above the ulna side end of the wrist.

  By configuring in this way, the measurement site of the wrist where the pulsation of the radial artery is noticeable in a state where the wrist is placed can be in a horizontal state, and the wrist holding posture suitable for pulse wave measurement can be obtained. Can be realized.

  The pulse wave measuring device based on this invention is provided with the pulse wave detection part which detects a pulse wave, and the wrist holder for pulse wave measuring devices in any one of the above-mentioned.

  By configuring in this way, it is possible to provide a pulse wave measuring device that is easy to wear and can stably hold the posture of the wrist and that does not reduce the accuracy of pulse wave measurement.

  In the pulse wave measurement device according to the present invention, it is preferable that a display unit capable of displaying information obtained by the wrist detection unit is further provided.

  By configuring in this way, it is possible to prompt the subject to realize a correct wrist holding posture at the time of wearing, and the wearing work can be greatly facilitated.

  According to the present invention, the wrist holding base for a pulse wave measuring device that can be easily worn and can stably hold the posture of the wrist and does not reduce the measurement accuracy of the pulse wave, and the pulse wave measurement provided therewith It can be a device.

  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. 1 (A) is a skeleton view of the vicinity of the left wrist of the human body when viewed from the palm side of the left hand, and FIG. 1 (B) is a diagram of the left wrist along the line IB-IB in FIG. It is arrow sectional drawing. In addition, FIG. 1 (B) is a figure when the cross section of the left wrist is viewed from the central side toward the distal side.

  As shown in FIGS. 1A and 1B, a radius 56 and an ulna 57 are positioned inside a wrist 52 positioned between the left 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 at a position corresponding to the thumb 51 a side of the left hand 51, and the ulna 57 is located in the forearm 53 at a position corresponding to the little finger 51 b side of the left hand 51. The ends of the radius 56 and the ulna 57 are located inside the wrist 52. The ends of the radius 56 and the ulna 57 have projection portions called a radius styloid projection 56a and an ulnar pedicle projection 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 left hand 51. The radial artery 58 extends in substantially the same direction as the direction in which the radius 56 extends. Further, a wrist joint front horizontal pattern 52 a is located on the skin of the wrist 52 corresponding to the palm side of the left hand 51. The wrist joint front horizontal pattern 52 a extends in the circumferential direction of the wrist 52.

In this specification, as shown in FIG. 1 (B), the portion of the wrist 52 on the side where the radius 56 is located is referred to as “the radius side portion of the wrist 52” and the portion on the side of the wrist 52 where the ulna 57 is located. This is referred to as “the ulna side portion of the wrist”. Of the boundary portion on the body surface between the portion corresponding to the palm side of the left hand 51 of the wrist 52 and the portion corresponding to the back side of the left 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 located on the body surface of the ulna side is referred to as the “ulna side end”. In the figure, a radial end by the symbol P _A, respectively show ulnar end by symbol P _B. In the above description, the wrist of the left hand has been described as an example, but the same applies to the wrist of the right hand, except that the placement position in the wrist such as the radius, ulna, and radial artery is symmetrical. Needless to say.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiment described below, the wrist holding base for a pulse wave measuring device configured to be able to use the wrist of the left hand as a measurement site for pulse wave measurement and a pulse wave including the wrist holding base. The measurement apparatus will be exemplified and described.

  FIG. 2 is a diagram showing an external structure of the wrist holding base for the pulse wave measuring device according to the embodiment of the present invention. 3 is a perspective view showing the structure of the wrist holding portion of the wrist holding base for the pulse wave measuring device shown in FIG. 2, and FIG. 4 is a view of the wrist holding portion along the line IV-IV shown in FIG. It is sectional drawing.

  First, with reference to FIG. 2, the external structure of the wrist holding base for a pulse wave measuring device in the present embodiment will be described. As shown in FIG. 2, the wrist holding table 2 for pulse wave measuring device in the present embodiment has a holding table body 10 that is mounted on a mounting surface such as a table. The holding base body 10 has a flat, substantially rectangular parallelepiped outer shape, and the upper surface 10a is gently inclined, the front side (subject side) is low, and gradually increases toward the back side. It is formed to be high. A recessed portion 11 for receiving a forearm is provided at a predetermined position on the upper surface 10 a of the holding base body 10. The recess 11 has a gently curved shape so that the forearm can be easily fitted.

  A wrist holding portion 12 for holding the wrist is positioned on an extension line in the extending direction of the concave portion 11 of the holding base body 10. The wrist holding part 12 is configured by a member separate from the holding base body 10 and is detachably attached to the holding base body 10. More specifically, the wrist holding portion 12 is configured so as to be fitted into the guide rails of the column portions 10b and 10c provided in the holding base body 10 by providing a guide groove on the side surface thereof. The specific structure of the wrist holder 12 will be described later.

  The holding body 10 has a rotating arm 17 at a predetermined position on the upper surface 10a. Specifically, a shaft support portion 16 protrudes upward from the upper surface 10a of the holding base body 10 on the left side of the position where the wrist holding portion 12 of the holding base body 10 is attached. Thus, a rotation shaft 17a provided at one end in the longitudinal direction of the rotation arm 17 is supported. As a result, the pivot arm 17 pivots in the direction of the arrow R in the figure with the pivot shaft 17a as the central axis with respect to the holder base body 10, and the wrist is placed on the holder base body 10. The wrist can be sandwiched between the holding base body 10. Here, the rotation shaft 17 a of the rotation arm 17 is disposed so as to extend in a direction parallel to the axial direction of the wrist placed on the holding base body 10.

  A pulse wave detector 18 is provided at a predetermined position on the lower surface of the rotating arm 17. The pulse wave detector 18 includes a pulse wave sensor 38 (see FIG. 5) for detecting the pulse wave, and a pressing cuff 31 (see FIG. 5) for pressing the pulse wave sensor 38 toward the wrist. ing. As the pulse wave sensor 38, for example, a pressure sensor provided with a capacitive element, a pressure sensor provided with a strain resistance element, an impedance measurement sensor capable of measuring bioimpedance, or the like can be used. Moreover, as the press cuff 31, a fluid bag into which a gas or liquid can be introduced is preferably used, but a mechanical actuator such as a motor or a solenoid can also be used.

  A surface fastener 19a is attached to the other end of the rotating arm 17 in the longitudinal direction, and a surface fastener 19b that engages with the surface fastener 19a is attached to a predetermined position on the side surface of the holding base body 10. . These hook-and-loop fasteners 19a and 19b can be locked by being in contact with each other, and maintain this state in a state where the wrist placed on the holding base body 10 is sandwiched between the rotating arm 17 and the holding base body 10. Functions as a means. More specifically, the hook and loop fasteners 19 a and 19 b move away from the holding base body 10 when the wrist placed on the holding base body 10 is sandwiched between the rotary arm 17 and the holding base body 10. It functions as a member that restricts movement in the direction, and thereby maintains an appropriate pressing state of the pulse wave detector 18 against the wrist.

  The pulse wave measuring device according to the present embodiment includes a PC (personal computer) 3 (see FIG. 5) as an external terminal in addition to the above-described wrist holder 2 for pulse wave measuring device. The PC 3 as an external terminal is an apparatus for obtaining a pulse wave by performing arithmetic processing mainly based on information detected by the pulse wave detection unit 18 described above. The pulse wave measuring device wrist holder 2 and the PC 3 are connected to each other by a connection cable such as a USB (universal serial bus) cable. In the pulse wave measuring device according to the present embodiment, the pulse wave measuring device wrist is connected. The connection cable is connected to an input / output terminal provided on the front surface of the holding table 2, whereby the pulse wave measuring device wrist holding table 2 and the PC 3 are connected.

  Next, with reference to FIG. 3 and FIG. 4, the structure of the wrist holding part of the wrist holding base for the pulse wave measuring device in the present embodiment will be described. As shown in FIG. 3, the wrist holding part 12 is comprised with the box-shaped member which has a substantially rectangular parallelepiped external shape. The upper surface of the wrist holding part 12 is provided with a recessed groove 13 that can receive the wrist corresponding to the back side of the left hand. The surface of the groove 13 has two inclined surfaces with a ridge line 13a extending in a direction along the circumferential direction of the wrist in a state where the wrist is placed on the wrist holding portion 12 as a boundary.

  Of these two inclined surfaces, the inclined surface located on the front side (subject side) of the holding base body 10 has a wrist central side (ie, forearm side) portion in a state where the wrist is placed on the wrist holding portion 12. It is a central wrist support surface 13b that supports the portion by being addressed, and the inclined surface located on the back side of the holding base body 10 is the distal side of the wrist when the wrist is placed on the wrist holding portion 12 It is the peripheral wrist support surface 13c which supports this by the part being addressed.

  The respective wrist support surfaces 13b and 13c are gradually lowered in height as they move away from the ridge line 13a in a direction parallel to the axial direction of the wrist when the wrist is placed on the wrist holding portion 12. It is formed in a shape that lowers. Each wrist support surface 13b, 13c has a shape curved in a direction along the circumferential direction of the wrist when the wrist is placed on the wrist holding portion 12, and the wrist of the left hand is placed in the groove 13. Shaped so that the wrist can be held in an inclined position so that the portion corresponding to the palm side of the wrist faces upward and the radius side end of the wrist is positioned higher than the ulna side end of the wrist in the received state Has been. More specifically, the surface of the groove 13 is formed asymmetrically left and right (so that the left and right curvatures are different) in a direction intersecting the axial direction of the wrist.

  Two wrist detectors 14A and 14B are provided at predetermined positions on the central wrist support surface 13b. On the other hand, one wrist detector 14C is provided at a predetermined position on the distal wrist support surface 13c. Each of the wrist detection units 14A to 14C is an optical sensor including an LED (light-emitting diode) 15a serving as a light projecting element and a PD (photodiode) 15b serving as a light receiving element disposed in the wrist holding unit 12. It is configured. More specifically, a translucent window is provided on the surface of the groove 13 (that is, the central wrist support surface 13b and the distal wrist support surface 13c), and is positioned corresponding to the translucent window. Thus, the LED 15a and the PD 15b are arranged in the wrist holding part 12.

  FIG. 5 is a diagram showing functional blocks of the pulse wave measurement device according to the embodiment of the present invention. FIG. 5 also shows a PC as an external terminal of the pulse wave measuring device. Next, functional blocks of the pulse wave measurement device according to the present embodiment will be described with reference to this figure.

  As shown in FIG. 5, the pulse wave measuring device 1 is composed of a pulse wave measuring device wrist holder 2 and a PC 3, each of which has various functional blocks. The pulse wave measuring device wrist holder 2 is provided with the pulse wave detector 18 as described above, and the pulse wave sensor 38 and the pulse wave sensor 38 output the pulse wave detector 18. There are provided a multiplexer 39 as a signal extraction unit for time-division multiplexing and selectively deriving a plurality of voltage signals, and a pressure cuff 31 that is pressure-adjusted to press the pulse wave sensor 38 against the wrist.

  In addition to the above, the holding base body 10 of the pulse wave measuring device wrist holding base 2 has a pressurizing pump 32 for increasing the internal pressure of the pressing cuff 31 (hereinafter also referred to as cuff pressure), and the internal pressure. A negative pressure pump 33 for lowering pressure, a switching valve 34 for selectively connecting any one of the pressure pump 32 and the negative pressure pump 33 to the pressing cuff 31, the pressure pump 32, the negative pressure pump 33, and A control circuit 35 for controlling the operation of the switching valve 34, a pressure sensor 36 for detecting the pressure in the pressing cuff 31, and an A / D converter for converting an analog signal derived from the pressure sensor 36 into a digital signal 37, an A / D converter 40 for converting an analog signal derived from the pulse wave detector 18 into a digital signal, and LEDs 15a and PD 15b constituting the wrist detectors 14A to 14C, It is provided. In FIG. 5, only one LED 15a and one PD 15b are shown, but in actuality, LEDs 15a and PD 15b corresponding to the number of wrist detection units (three in the present embodiment) are actually provided. Will be provided.

  The PC 3 includes a CPU (central processing unit) 41 as an arithmetic processing unit that executes various arithmetic processes including arithmetic operations for centrally controlling the pulse wave measuring device 1, data for controlling the pulse wave measuring device, and ROM (read only memory) 42 and RAM (random access memory) 43 for storing a program, an operation unit 44 that is provided so as to be operable from the outside and is operated to input various information, a pulse wave measurement result, etc. And a display unit 45 including an LCD (liquid crystal display) for outputting various information to the outside.

  6 and 7 are schematic perspective views for illustrating a procedure for setting the wrist of the left hand on the wrist holder for the pulse wave measuring device according to the embodiment of the present invention. Next, with reference to these drawings, a procedure for setting the wrist of the left hand on the wrist support base for the pulse wave measurement device according to the present embodiment will be described.

  First, the wrist holder 2 for the pulse wave measuring device is placed on a placement surface such as a table. Subsequently, as shown in FIG. 6, the forearm 53 that is hung from the elbow to the wrist 52 is placed on the concave portion 11 provided on the upper surface 10 a of the holding base body 10. At this time, the wrist 52 corresponding to the back side of the left hand 51 is positioned and arranged in the groove 13 of the wrist holding portion 12. More specifically, the wrist joint front lateral pattern 52 a of the wrist 52 is set as a mark so that the wrist joint front lateral pattern 52 a is located slightly behind the groove 13. As a result, the measurement site 100 where the pulsation of the radial artery appears remarkably on the skin is positioned on the groove 13.

Here, in the wrist holder 2 for pulse wave measuring device according to the present embodiment, the groove 13 of the wrist holder 12 is formed so as to be in a state suitable for holding the wrist 52 of the left hand 51 as described above. Therefore, as shown in FIG. 6, when the wrist 52 of the left hand 51 is placed on the holding base body 10, the wrist 52 corresponding to the palm side of the left hand 51 faces upward and the rib side end of the wrist 52 P _a is so positioned above the ulnar end P _B of the wrist 52, the wrist holding unit 12 holds the wrist 52 at an inclined position. Therefore, the measurement site 100 in which the above-described pulsation of the radial artery appears remarkably on the skin is maintained in a substantially horizontal state. Therefore, the parallelism between the sensor surface of the pulse wave sensor 38 and the measurement site 100 can be maintained, which contributes to improvement in measurement accuracy.

  Next, as shown in FIG. 7, the rotating arm 17 is rotated toward the holding base body 10, and the wrist 52 placed on the wrist holding portion 12 of the holding base body 10 holds the rotating arm 17. The pulse wave detector 18 provided on the lower surface of the rotating arm 17 is brought into contact with the measurement site 100 so as to be sandwiched between the base body 10. At this time, if the above-described positioning is insufficient, the positions of the forearm 53 and the wrist 52 placed in the recess 11 are finely adjusted so that the pulse wave detection unit 18 contacts the measurement site 100. Subsequently, the hook-and-loop fastener 19 a attached to the rotating arm 17 is locked to the hook-and-loop fastener 19 b attached to the holding base body 10, and the rotating arm 17 is fixed to the holding base body 10 so as not to move. Thus, the setting of the wrist 52 of the left hand 51 to the pulse wave measuring device wrist holder 2 is completed.

  FIG. 8A is a schematic perspective view showing a wrist holding state when a correct wrist holding posture is maintained through the above-described mounting procedure, and FIG. 8B is a schematic perspective view of FIG. It is a schematic sectional drawing in alignment with the VIIIB-VIIIB line | wire shown in FIG. FIG. 8B is a view when the cross section of the left wrist is viewed from the distal side toward the central side. On the other hand, FIG. 9 (A) is a schematic perspective view showing an example of a wrist holding state when the correct wrist holding posture is not taken, and FIG. 9 (B) is an XIB- shown in FIG. 9 (A). It is a schematic sectional drawing in alignment with the XIB line. In addition, FIG. 9B is a view when the cross section of the left wrist is viewed from the distal side toward the central side. The state shown in FIGS. 9A and 9B shows the wrist holding state when the wrist is displaced toward the subject as compared to the correct wrist holding state. In the following, the correlation between the wrist holding posture and the wrist detection unit will be described with reference to these drawings.

  As shown in FIGS. 8A and 8B, when the wrist 52 is placed on the wrist holding portion 12 in the correct holding posture, of the wrist 52 of the portion corresponding to the back side of the left hand 51 The center side (forearm 53 side) of the wrist holding portion 12 is in a state of being directed to the center wrist support surface 13b of the groove 13 of the wrist holding portion 12, and the distal side of the wrist 52 corresponding to the back side of the left hand 51 The portion on the left hand 51 side is in a state of being addressed to the distal wrist support surface 13 c of the groove 13 of the wrist holding portion 12. That is, the posture of the left hand 51 is held by the wrist holding unit 12 with the wrist 52 slightly tilted to the back side.

  In this state, the surface of the wrist 52 corresponding to the back side of the left hand 51 is in contact with the central wrist support surface 13b and the distal wrist support surface 13c, and is provided corresponding to the wrist detection units 14A to 14C. All translucent windows are covered by the wrist 52. In this state, as shown in FIG. 8B, the light emitted from the LED 15a is reflected on the surface of the wrist 52 of the left hand 51, and the reflected light is received by the PD 15b. Therefore, it is detected by the wrist detection units 14 </ b> A to 14 </ b> C that the wrist 52 of the left hand 51 is correctly placed on the surface of the groove 13.

  On the other hand, as shown in FIGS. 9 (A) and 9 (B), in the holding state of the wrist 52 when the wrist 52 is displaced toward the subject compared to the correct holding state of the wrist, Corresponding to the back side of the left hand 51, the central side (forearm 53 side) of the corresponding part of the wrist 52 is in a state of being addressed to the central wrist support surface 13 b of the groove 13 of the wrist holding part 12. The distal side (left hand 51 side) portion of the wrist 52 of the portion to be performed is not addressed to the distal wrist support surface 13 c of the groove 13 of the wrist holding portion 12. That is, when the wrist 52 of the left hand 51 is displaced toward the subject, a distance D is generated between the distal wrist support surface 13c and the distal portion of the wrist 52, as shown in FIG. 9B. .

  In this state, light emitted from the LED 15a is scattered in the wrist detection unit 14C, and light with sufficient intensity does not reach the PD 15b. Therefore, it is detected in the wrist detection unit 14 </ b> C that the wrist 52 of the left hand 51 is not correctly assigned to the surface of the groove 13.

  Thus, in the pulse wave measuring device wrist holder 2 and the pulse wave measuring device 1 including the same in the present embodiment, the wrist 52 of the left hand 51 is correctly placed on the surface of the groove 13 by the wrist detecting units 14A to 14C. It is possible to detect whether or not it is addressed, and it is possible to determine whether or not the holding state of the wrist 52 of the left hand 51 is suitable for pulse wave measurement. Here, since one or more wrist detection units 14A to 14C are provided on each of the central wrist support surface 13b and the distal wrist support surface 13c of the groove 13 of the wrist holding unit 12, wrists suitable for pulse wave measurement are provided. Whether the warped state of 52 is reproduced can be reliably detected by the wrist detection units 14A to 14C. Therefore, if the information is used, the wearing can be facilitated, or the subject can be encouraged to maintain the posture of the wrist 52 stably.

  In the pulse wave measuring apparatus 1 in the present embodiment, the detection result of the wrist 52 of the left hand 51 by the wrist detection units 14A to 14C can be displayed on the display unit 45 of the PC 3. Hereinafter, an example of using the detection result in the wrist detection unit will be described by specifically showing the processing procedure of the pulse wave measurement device 1 in the present embodiment and the display example in the display unit 45.

  FIG. 10 is a flowchart showing a processing procedure for pulse wave measurement in the pulse wave measurement device according to the embodiment of the present invention. Moreover, FIG. 11 is a figure which shows the example of a display in the display part of the pulse-wave measuring apparatus in this Embodiment. Next, with reference to these drawings, a processing procedure of the pulse wave measurement device according to the present embodiment and a display example on the display unit will be described. The program according to the flowchart shown in FIG. 10 and the data to be referred to when executing the program are stored in the ROM 42 or the RAM 43 in advance, and the CPU 41 reads out and executes the program while referring to this data as appropriate, whereby the pulse wave measurement process is performed. Progresses.

  As shown in FIG. 10, when a power switch (not shown) is turned ON, the CPU 41 instructs the control circuit 35 to drive the negative pressure pump 33. Based on this instruction, the control circuit 35 switches the switching valve 34 to the negative pressure pump 33 side and drives the negative pressure pump 33 (step S1). 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 detector 18. As a result, it can be avoided that the pulse wave sensor 38 protrudes carelessly and malfunctions or breaks down.

  Next, the subject wears the pulse wave detector 18 on the wrist by the wearing procedure shown in FIGS. 6 and 7 described above. At this time, CPU41 drives the optical sensor which consists of LED15a and PD15b as wrist detection part 14A-14C, irradiates light toward the wrist 52 of the left hand 51, and monitors whether the reflected light is detected. (Step S2).

  If the reflected light of the light emitted from the LED 15a by the PD 15b is not detected by the PD 15b in all of the wrist detection units 14A to 14C (NO in step S2), the CPU 41 correctly places the wrist on the wrist holding unit 12. It is determined that there is no error, and an error is displayed on the display unit 45 of the PC 3 to notify the subject that the wrist is not set correctly (step S3). For example, FIG. 11A is a display example when no wrist is detected in any of the wrist detection units 14A to 14C, and any of the signals SA to SC corresponding to the wrist detection units 14A to 14C. Is turned off, the subject is prompted to place the wrist of the left hand on the wrist holder 12. FIG. 11B is a display example when wrists are detected in the wrist detection units 14A and 14B, but wrists are not detected in the wrist detection units 14C, and signals corresponding to the wrist detection units 14A and 14B. Although SA and SB are lit, the signal SC corresponding to the wrist detection unit 14C is not lit, thereby urging the subject to correct the wrist holding posture.

  On the other hand, if the reflected light of the light emitted from the LED 15a by the PD 15b is detected by the PD 15b in all of the wrist detection units 14A to 14C (YES in step S2), the CPU 41 correctly places the wrist on the wrist holding unit 12. The display unit 45 of the PC 3 displays that fact. FIG. 11C is a display example when a wrist is correctly held and thus a wrist is detected in any of the wrist detection units 14A to 14C, and corresponds to the wrist detection units 14A to 14C. When any of the signals SA to SC is lit, the subject is notified that it is possible to shift to pulse wave measurement.

  As shown in FIG. 10, when a wrist is detected in step S2 (YES in step S2), the CPU 41 waits for a start button (not shown) to be turned on, and then the CPU 41 sends a pressure pump to the control circuit 35. 32 is instructed to be driven. Thereby, 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 S4). Along with this operation, the cuff pressure rises, and the pulse wave sensor 38 is lowered toward the wrist and is pressed against the surface of the wrist that is the measurement site.

  When the pulse wave sensor 38 is pressed against the wrist surface, cuff pressure information is derived from the pressure sensor 36, converted into digital information by the A / D converter 37, and provided to the 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. CPU41 determines whether the conditions for pulse-wave detection were satisfy | filled based on these digital information (step S5). When the conditions for pulse wave detection are satisfied (YES in step S5), the pressing level of the pulse wave sensor 38 to the measurement site by the pressing cuff 31 is set to the optimum level for pulse wave detection. The output of the pressurizing pump 32 is adjusted (step S6). Under optimum pressure adjustment for the pressure cuff 31, pressure information output from the pulse wave sensor 38, that is, waveform data of the radial artery pulse wave, is transferred to the CPU 41 via the multiplexer 39 and the A / D converter 40. (Step S7).

  The CPU 41 receives the waveform data and detects a pulse wave based on the received waveform data. The process of transferring the pulse wave data in step S7 is repeated until the waveform data is received and it is determined that the predetermined condition for ending the 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 S8), the CPU 41 controls to drive the negative pressure pump 33 via the switching valve 34 (step S9). Thereby, the pressing 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. At this time, the pulse wave information may be output as an AI (Augmentation Index) value.

  As described above, the pulse wave measuring device 1 including the pulse wave measuring device wrist holder 2 as in the present embodiment is easy to wear and stably holds the wrist posture. In addition, the pulse wave measuring device can be used in which the pulse wave measurement accuracy is not lowered.

  In the above-described embodiment of the present invention, the case where an optical sensor including an LED and a PD is employed as the wrist detection unit has been described as an example. However, other means may be used. For example, as shown in FIG. 12, a contact-type microswitch 15c can be used as a wrist detection unit. In this case, an opening is provided in the groove 13 so that the microswitch 15c comes into contact with the wrist placed in the groove 13 of the wrist holding part 12, and the tip of the switch slightly extends from the surface of the groove 13 from the opening. It is necessary to arrange so that it protrudes.

  Further, in the above-described embodiment of the present invention, the case where the wrist detecting unit is provided at three positions on the wrist holding unit has been described as an example, but the number of wrist detecting units is not particularly limited. . Further, the arrangement position can be changed as appropriate.

  Further, in the above-described embodiment of the present invention, the case where the detection result of the wrist detection unit is displayed as a signal on the display unit has been described as an example, but guidance text may be displayed on the display unit. It is also possible to notify the subject by sound or voice.

  In the above-described embodiment of the present invention, a case where the pulse wave measurement is configured to be possible only when the wrist is in the correct holding posture by the wrist detection unit before the pulse wave measurement is illustrated. Although explained, the wrist detection unit constantly monitors whether the wrist is in the correct holding posture even during measurement, and if there is a problem with the wrist holding posture, the pulse wave measurement is interrupted and the measurement fails The apparatus may be configured to notify the subject that the test has been performed, or to notify the subject that there is a problem with the reliability of the measurement result although the measurement continues.

  Furthermore, in the above-described embodiment of the present invention, the wrist holding base for the pulse wave measuring device configured to be able to use the wrist of the left hand as a measurement site for pulse wave measurement, Although the pulse wave measuring device provided is described as an example, the wrist holding base for the pulse wave measuring device configured to be able to use the wrist of the right hand as a measurement site for pulse wave measurement and the same Naturally, it is possible to apply the present invention to a pulse wave measuring device equipped with a device such that either the wrist of the left hand or the wrist of the right hand can be used as a measurement site for pulse wave measurement. It is also possible to apply the present invention to the constructed wrist holder for a pulse wave measuring device and the pulse wave measuring device including the same.

  Thus, the one embodiment disclosed this time is illustrative in all respects and is 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 the skeleton figure at the time of seeing the left wrist vicinity of a human body from the palm side of the left hand, and arrow sectional drawing of a left wrist. It is a figure which shows the external appearance structure of the wrist holding stand for pulse wave measuring devices in embodiment of this invention. It is a perspective view which shows the structure of the wrist holding | maintenance part of the wrist holding stand for pulse wave measuring devices in embodiment of this invention. It is sectional drawing of the wrist holding | maintenance part of the wrist holding stand for pulse wave measuring devices in embodiment of this invention. It is a figure which shows the functional block of the pulse-wave measuring apparatus in embodiment of this invention. It is a schematic perspective view for showing the procedure of setting the wrist of the left hand on the wrist holder for the pulse wave measuring device in the embodiment of the present invention. It is a schematic perspective view for showing the procedure of setting the wrist of the left hand on the wrist holder for the pulse wave measuring device in the embodiment of the present invention. It is the schematic perspective view and schematic sectional drawing which show the holding state of the wrist when the correct wrist holding posture is maintained. It is the schematic perspective view and schematic sectional drawing which show an example of the holding | maintenance state of the wrist when not having the correct wrist holding posture. It is a flowchart which shows the process sequence for the pulse wave measurement in the pulse wave measuring device in embodiment of this invention. It is a figure which shows the example of a display in the display part of the pulse-wave measuring apparatus in embodiment of this invention. It is sectional drawing which shows the other structural example of the wrist holding part of the wrist holding stand for pulse wave measuring devices in embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Pulse wave measuring device, 2 Wrist holder for pulse wave measuring devices, 3 PC, 10 Main body of holding base, 10a Upper surface, 10b, 10c Strut part, 11 Recessed part, 12 Wrist holding part, 13 Groove, 13a Ridge line, 13b Central side Wrist support surface, 13c distal wrist support surface, 14A to 14C wrist detection unit, 15a LED, 15b PD, 15c microswitch, 16 shaft support unit, 17 rotation arm, 17a rotation axis, 18 pulse wave detection unit, 19a, 19b surface fastener, 31 pressure cuff, 32 pressure pump, 33 negative pressure pump, 34 switching 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 unit, 45 display unit, 51 left hand, 51a thumb, 51b small , 52a wrist front striated, 52 wrist, 53 forearm 56 radius, 56a radial styloid, 57 feet bones, 57a ulnar styloid, 58 radial artery, 100 measuring site.

Claims (7)

A holding base body mounted on the mounting surface;
A wrist holding portion including a recess-shaped groove provided on the upper portion of the holding base body and capable of holding the posture of the wrist by placing the wrist;
A wrist detection unit that is provided in the wrist holding unit and detects whether or not the wrist is addressed to the surface of the groove;
The groove includes a central wrist support surface to which a central part of the wrist is addressed when the wrist is placed on the wrist holding portion, and a distal side of the wrist when the wrist is placed on the wrist holding portion. A peripheral wrist support surface to which the part is addressed,
The central wrist support surface and the distal wrist support surface are arranged in different directions so that the wrist can be held in a warped posture by being placed so that the wrist is along the surface of the groove. Placed facing
A wrist holding base for a pulse wave measurement device, wherein at least one wrist detection unit is provided on each of the central wrist support surface and the distal wrist support surface.   The wrist holding table for a pulse wave measuring device according to claim 1, wherein the wrist detecting unit includes an optical sensor including a light projecting element and a light receiving element.   The wrist holding table for a pulse wave measuring device according to claim 1, wherein the wrist detecting unit includes a contact-type micro switch. The groove extends in a direction along the circumferential direction of the wrist in a state where the wrist is placed on the wrist holding portion, and has a ridge line serving as a boundary between the central wrist support surface and the distal wrist support surface on a surface thereof. Have
The central wrist support surface and the distal wrist support surface are configured to incline downward from the ridge line toward the axial direction of the wrist with respect to the ridge line as a boundary. To 3. The wrist holder for the pulse wave measuring device according to any one of items 1 to 3.   The groove is formed so that the portion corresponding to the palm side of the wrist faces upward when the wrist is placed on the wrist holding portion, and the radius side end portion of the wrist is positioned above the ulna side end portion of the wrist. The wrist holding base for a pulse wave measuring device according to claim 1, wherein the wrist holding base has a shape capable of holding the wrist in an inclined posture. A pulse wave detector for detecting a pulse wave;
A pulse wave measuring device comprising the wrist holding base for the pulse wave measuring device according to claim 1.   The pulse wave measurement device according to claim 6, further comprising a display unit capable of displaying information obtained by the wrist detection unit.

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