Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B5/00—Measuring for diagnostic purposes; Identification of persons
  • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow

Definitions

• the present invention relates to a wrist holder for a pulse wave measuring device capable of holding the posture of a wrist in order to measure a periodic internal pressure fluctuation of an artery located under the wrist, and a pulse provided with the same.
• the present invention relates to a wave measuring device.
• 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.
• the pulse wave measuring device non-invasively measures the internal pressure fluctuation of the radial artery located in a relatively shallow area under the wrist by pressing a pulse wave detecting unit including a sensor or the like against the surface of the wrist.
• the pulse wave measuring device In order to accurately measure the pulse wave, the posture of the wrist needs to be stably maintained during the measurement. For this reason, the pulse wave measuring device is often provided with a wrist holder for stably holding the posture of the subject's wrist.
• Patent Document 1 Japanese Patent Laid-Open No. 11 33007
• Patent Document 2 Japanese Patent Laid-Open No. 2005-87483
• the wrist posture is held stably.
• 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.
• Patent Document 1 Japanese Patent Laid-Open No. 11 33007
• Patent Document 2 JP 2005-87483 A
• 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. Therefore, it is very easy to fix the wrist.
• the part corresponding to the back side of the wrist is not correctly placed on the surface of the groove of the wrist holding part, it does not have a fastening tool like the band-shaped part described above. As a result, the measurement accuracy is lowered to the state where the wrist posture is stably held.
• the present invention has been made to solve the above-described problems, is easy to wear, can stably hold the wrist posture, and has a pulse wave measurement accuracy. It is an object of the present invention to provide a wrist holding base for a pulse wave measuring device that does not decrease and a pulse wave measuring device including the same.
• a wrist holding base for a pulse wave measuring device is provided on a mounting base body placed on a placement surface and an upper part of the holding base body, and the wrist is placed on the wrist.
• a wrist holding part including a recessed groove capable of holding a posture, and a wrist detecting part provided on the wrist holding part for detecting whether or not the wrist is placed on the surface of the groove.
• the wrist detecting unit is constituted by an optical sensor including a light projecting element and a light receiving element. Further, in the wrist holding base for the pulse wave measuring device according to the present invention, the wrist detecting unit is constituted by a contact type micro switch.
• the groove has a ridge line extending in a direction along the circumferential direction of the wrist in a state where the wrist is placed on the wrist holding portion.
• at least one wrist detection unit is provided on each of the two wrist support surfaces.
• the groove corresponds to a portion corresponding to the palm side of the wrist when the wrist is placed on the wrist holding portion. It is preferable to have a shape that can hold the wrist in a tilted posture so that the radial side end of the wrist is positioned above the ulna side end of the wrist.
• the measurement site of the wrist in which 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 suitable for pulse wave measurement can be placed.
• a holding posture can be realized.
• a pulse wave measuring device includes a pulse wave detecting unit that detects a pulse wave, and the wrist holding base for the pulse wave measuring device according to any one of the above!
• the pulse wave measuring device is obtained by the wrist detecting unit. It is preferable that a display unit capable of displaying information is further provided.
• a wrist holder for a pulse wave measuring device that can be easily worn and can stably hold the posture of the wrist and that does not reduce the accuracy of measuring a pulse wave, and the wrist holder. It can be set as a pulse wave measuring device.
• FIG. 1A is a skeleton view of the vicinity of the left wrist of a human body when viewed from the palm side of the left hand.
• FIG. 1B is a cross-sectional view of the wrist taken along the line IB-IB shown in FIG. 1A.
• FIG. 2 is a diagram showing an external structure of a wrist holder for a pulse wave measuring device according to an embodiment of the present invention.
• FIG. 3 is a perspective view showing a structure of a wrist holding portion of a wrist holding base for a pulse wave measuring device according to an embodiment of the present invention.
• FIG. 4 is a cross-sectional view of a wrist holding portion of a wrist holding base for a pulse wave measuring device according to an embodiment of the present invention.
• FIG. 5 is a diagram showing functional blocks of the pulse wave measuring device in the 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 wrist holding base for the pulse wave measuring device according to the embodiment of the present invention.
• FIG. 7 is a schematic perspective view for illustrating a procedure for setting the wrist of the left hand on the wrist holding base for the pulse wave measuring device according to the embodiment of the present invention.
• FIG. 8A is a schematic perspective view showing a wrist holding state when a correct wrist holding posture is maintained.
• FIG. 8B is a schematic sectional view taken along line VIIIB-VIIIB shown in FIG. 8A.
• FIG. 9A is a schematic perspective view showing an example of a wrist holding state in the case of right! /, A wrist holding posture! /, Na! /.
• FIG. 9B is a schematic cross-sectional view along the line IXB-IXB shown in FIG. 9A.
• FIG. 10 shows a process for measuring a pulse wave in the pulse wave measuring apparatus according to the embodiment of the present invention. It is a flowchart which shows a procedure.
• FIG. 11A is a diagram showing a display example on the display unit of the pulse wave measuring device in the embodiment of the present invention.
• FIG. 11B is a diagram showing another display example on the display unit of the pulse wave measurement device according to the exemplary embodiment of the present invention.
• FIG. 11C is a diagram showing still another display example on the display unit of the pulse wave measuring device in the embodiment of the present invention.
• FIG. 12 is a cross-sectional view showing another configuration example of the wrist holding portion of the wrist holding base for the pulse wave measuring device according to the embodiment of the present invention.
• 1 pulse wave measuring device 2 wrist holding base for pulse wave measuring device, 3 PC, 10 holding base body, 10a top surface, 10b, 10c strut part, 11 recess, 12 wrist holding part, 13 'groove, 13a Ridge line, 13b Central wrist support surface, 13c Peripheral wrist support surface, 14A ⁇ ; 14C Wrist detection unit, 15a LED, 15b PD, 15c Microswitch, 16 pivot support, 17 pivot arm, 17a pivot shaft, 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 control unit, 45 display unit, 51 left hand, 51a thumb, 51b little finger, 52a wrist joint striated, 52 wrist, 53 forearm, 56 rib, 56a Radial styloid process,
• FIG. 1A is a skeletal view of the vicinity of the left wrist of the human body when viewed from the palm side of the left hand.
• Fig. 1B is a view of the cross section of the left wrist as viewed from the central side to the peripheral side.
• a radius 56 and an ulna 57 are positioned inside a wrist 52 positioned between the left hand 51 and the forearm 53. Ribs 56 and ulna 57, from elbow to wrist 52 Extending in parallel.
• the radius 56 is located in the forearm 53 at a position corresponding to the thumb 51a side of the left hand 51
• the ulna 57 is located in the forearm 53 at a position corresponding to the little finger 51b 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 the radius styloid process 56a and the ulnar styloid process 57a, respectively.
• 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 radius 56 extends.
• a front joint striated pattern 52a is located on the skin of the wrist 52 corresponding to the palm side of the left hand 51. This wrist joint front striated line 52a extends in the circumferential direction of the wrist 52.
• 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”.
• the ulna side of the wrist In addition, of the boundary on the body surface between the part corresponding to the palm side of the left hand 51 of the wrist 52 and the part corresponding to the back side of the left hand 51 of the wrist 52, it is located on the body surface of the side part of the rib of the wrist 52
• the portion to be referred to as “radial side end” and the portion located on the body surface of the ulna side portion of the wrist 52 is referred to as “ulna side end”.
• the radius side end is designated P
• FIG. 2 is a diagram showing an external structure of a wrist holder for a pulse wave measuring device according to an embodiment of the present invention.
• FIG. 3 is a perspective view showing the structure of the wrist holding part of the wrist holding table for the pulse wave measuring device shown in FIG. 2, and
• FIG. 4 shows the wrist holding part along the IV-IV line shown in FIG. It is a sectional view.
• the wrist holding base 2 for pulse wave measuring device in the present embodiment has a holding base body 10 placed on a placement surface such as a table.
• the holding base body 10 has a flat, substantially rectangular parallelepiped outer shape, and its upper surface 10a is gently inclined so that the front side (subject side) is gradually lowered toward the back side. It is formed to have a high height.
• a concave portion 11 for receiving the forearm is provided at a predetermined position on the upper surface 10a 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 unit 12 is formed of 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 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 a side surface thereof. The specific structure of the wrist holder 12 will be described later.
• the holding base body 10 has a rotating arm 17 at a predetermined position on the upper surface 10a thereof.
• a shaft support 16 projects upward from the upper surface 10a of the holding base body 10 on the left side of the position where the wrist holding part 12 of the holding base body 10 is attached.
• a rotating shaft 17a provided at one end in the longitudinal direction of the rotating arm 17 is supported.
• the pivot arm 17 pivots in the direction of 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 In this case, the wrist can be sandwiched between the holding base body 10.
• the rotation shaft 17a of the rotation arm 17 is arranged 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 detection unit 18 includes a pulse wave sensor 38 (see FIG. 5) for detecting a pulse wave and a press cuff 31 (see FIG. 5) for pressing the pulse wave sensor 38 toward the wrist.
• the pulse wave sensor 38 include a pressure sensor having a capacitance element, a pressure sensor having a strain resistance element, and an impedance measurement sensor capable of measuring bioimpedance. Is available.
• 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.
• a surface fastener 19a is attached to the other end in the longitudinal direction of the rotating arm 17, and a surface fastener 19b that engages with the surface fastener 19a is provided at a predetermined position on the side surface of the holding base body 10. Installed.
• These hook-and-loop fasteners 19a and 19b can be locked by contacting each other, and maintain the 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 member. More specifically, the hook-and-loop fasteners 19a and 19b are configured so that the rotating arm 17 has the holding base body 10 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. It functions as a member that restricts the movement of the pulse wave in the direction away from the head, thereby maintaining an appropriate pressing state of the pulse wave detection unit 18 against the wrist.
• the pulse wave measurement device includes a PC (personal computer) 3 (see FIG. 5) as an external terminal in addition to the above-described wrist holder 2 for the pulse wave measurement device.
• the PC 3 as an external terminal is a device for obtaining a pulse wave by performing arithmetic processing mainly based on the information detected by the pulse wave detection unit 18 described above.
• the wrist holder 2 for the pulse wave measuring device 2 and the PC 3 are connected with a force S connected by a connection cable such as a USB (universal serial bus) cable, for example.
• the pulse wave measuring device By connecting the connection cable to the input / output terminal provided on the front surface of the wrist holder 2 for the fixed device, the wrist holder 2 for the pulse wave measuring device 2 and the PC 3 are connected.
• the wrist holding part 12 is composed of a box-shaped member having a substantially rectangular parallelepiped outer shape.
• the wrist holding portion 12 On the upper surface of the wrist holding portion 12, there is provided a recess-shaped 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.
• the inclined surface located on the front side (subject side) of the holding base body 10 is the center side of the wrist (that is, the forearm) when the wrist is placed on the wrist holding part 12.
• Side is a central wrist support surface 13b that supports the portion by being addressed
• the inclined surface located on the back side of the holding base body 10 is a state where the wrist is placed on the wrist holding portion 12
• This is a peripheral wrist support surface 13c that supports the peripheral portion of the wrist when the peripheral portion of the wrist is attached.
• Each wrist support surface 13b, 13c is lowered in height as it moves away from the ridge 13a in a direction parallel to the axial direction of the wrist while the wrist is placed on the wrist holding portion 12. It is formed in a shape that gradually becomes lower toward.
• Each wrist support surface 13b, 13c has a shape curved in the 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. In a state in which the wrist is 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 above the ulna side end of the wrist Is formed. More specifically, the surface of the groove 13 is formed asymmetrically (so that the left and right curvatures are different) in the 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.
• one wrist detector 14C is provided at a predetermined position on the distal wrist support surface 13c.
• Each of these wrist detection units 14A to 14C is an optical system including an LED (light-emitting diode) 15a as a light emitting element and a PD (photo diode) 15b as a light receiving element disposed in the wrist holding unit 12. It consists of sensors. 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. Note that FIG. 5 also shows a PC as an external terminal of the pulse wave measuring device. Next, a functional block of the pulse wave measurement device according to the present embodiment will be described with reference to this figure.
• 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 wrist holder 2 for the pulse wave measuring device is provided with the pulse wave detector 18 as described above, and the pulse wave detector
• the unit 18 includes a pulse wave sensor 38, a multiplexer 39 as a signal extraction unit that selectively multiplexes and selectively derives a plurality of voltage signals output from the pulse wave sensor 38, and a pulse wave sensor 38 on the wrist.
• a pressing cuff 31 that is pressure-adjusted for pressing is provided.
• the holding base body 10 of the wrist holding base 2 for the pulse wave measuring device includes, in addition to the above, 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 reducing the internal pressure, a switching valve 34 for selectively connecting one of the pressure pump 32 and the negative pressure pump 33 to the pressure cuff 31, and the pressure pump 32, negative pressure A control circuit 35 for controlling the operation of the pump 33 and the switching valve 34, a pressure sensor 36 for detecting the pressure in the pressure cuff 31, and an analog signal derived from the pressure sensor 36 for converting the digital signal into a digital signal An A / D converter 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 PD15b constituting the wrist detectors 14A to 14C are provided. It has been. In FIG. 5, only one LED 15a and one PD15b are shown, but
• the PC 3 controls a central processing unit (CPU) 41 as an arithmetic processing unit that executes various arithmetic processes including arithmetic operations for centrally controlling the pulse wave measuring device 1, and a pulse wave measuring device.
• CPU central processing unit
• ROM read only memory
• RAM random access memory
• ROM read only memory
• operation unit 44 that can be operated from the outside and operated to input various information
• a display unit 45 consisting of a liquid crystal display (LCD) for externally outputting various information such as measurement results.
• LCD liquid crystal display
• FIG. 6 and FIG. 7 are schematic perspective views for illustrating a procedure for setting the wrist of the left hand on the wrist holding base for the pulse wave measuring device according to the embodiment of the present invention.
• a procedure for setting the wrist of the left hand on the wrist holder for the pulse wave measuring device in the present embodiment will be described.
• 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, a forearm 53 that is hung from the elbow to the wrist 52 is placed on the recess 11 provided on the upper surface 10 a of the holding base body 10. At this time, the hand corresponding to the back side of the left hand 51 The neck 52 is positioned and arranged in the groove 13 of the wrist holder 12. More specifically, the wrist joint front lateral pattern 52a of the wrist 52 is used as a mark, and the wrist joint front lateral pattern 52a is positioned 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.
• 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 wrist 52 Wrist holder 1 so that the radius side end P is positioned above the ulna side end P of the wrist 52
• the rotating arm 17 is rotated toward the holding base body 10 side, and the wrist 52 placed on the wrist holding portion 12 of the holding base body 10 is rotated.
• the pulse wave detection unit 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 arm 17 and the holding base body 10.
• the positions of the forearm 53 and the wrist 52 placed on the concave portion 11 are finely adjusted so that the pulse wave detection unit 18 contacts the measurement site 100.
• FIG. 8A is a schematic perspective view showing a wrist holding state when a correct wrist holding posture is maintained through the above-described wearing procedure
• FIG. 8B is a view taken along the line VIIIB-VIII shown in FIG. 8A. It is a schematic sectional drawing in alignment with B line.
• FIG. 8B is a view when the cross section of the left wrist is viewed from the distal side toward the central side.
• FIG. 9A is a schematic perspective view showing an example of a wrist holding state when the correct wrist holding posture is not achieved
• FIG. 9B is a schematic cross-sectional view taken along the line XIB-XIB shown in FIG. 9A.
• FIG. Figure 9B shows the left wrist cross section from the distal side.
• FIG. 9A and FIG. 9B shows the wrist holding state when the wrist is displaced toward the subject as compared to the correct wrist holding state.
• the central side of the wrist 52 corresponding to the back side of the left hand 51 (Forearm 53 side) is in a state where it is directed to the wrist support surface 13b on the central side of the groove 13 of the wrist holder 12, and the distal side (left hand 51) of the wrist 52 corresponding to the back side of the left hand 51 Side) is in a state of being addressed to the distal wrist support surface 13c of the groove 13 of the wrist holder 12. That is, the posture of the left hand 51 is held by the wrist holding unit 12 with the wrist 52 slightly tilted toward the back side.
• 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 connected to the wrist detection units 14A to 14C. All the translucent windows provided accordingly are covered with the wrist 52.
• 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 14A to 14C that the wrist 52 of the left hand 51 is correctly addressed to the surface of the groove 13.
• the wrist 52 is held when the wrist 52 is displaced toward the subject as compared to the correct wrist holding state!
• the central side (forearm 53 side) of the wrist 52 is in a state of being in contact with the central wrist support surface 13b of the groove 13 of the wrist holder 12, while the back of the left hand 51
• the distal side (left hand 51 side) portion of the wrist 52 corresponding to the side is not in contact with the distal wrist support surface 13c 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.
• the wrist 52 of the left hand 51 is formed into the groove 13 by the wrist detectors 14A to 14C.
• the 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, which is suitable for pulse wave measurement.
• the wrist detection unit 14A to 14C can reliably detect whether the state where the wrist 52 is warped is reproduced. For this reason, it is possible to use the information S to facilitate wearing or to urge the subject to keep the wrist 52 in a stable position.
• 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.
• the detection result in the wrist detection unit is used will be described by specifically showing the processing procedure of the pulse wave measurement device 1 and the display example on the display unit 45 in the present embodiment. .
• 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.
• FIG. 11 is a diagram showing a display example on the display unit of the pulse wave measurement device according to the present embodiment.
• the program according to the flowchart shown in FIG. 10 and the data to be referred to at the time of executing the program are stored in the ROM 42 or RAM 43 in advance, and the CPU 41 reads and executes the program while referring to this data as appropriate.
• the measurement process proceeds.
• 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 S).
• the cuff pressure acts to be sufficiently lower than the atmospheric pressure via the switching valve 34, so the pulse wave sensor 38 moves upward in the pulse wave detector 18. To do. As a result, it can be avoided that the pulse wave sensor 38 protrudes carelessly and malfunctions or breaks down.
• the subject wears the pulse wave detector 18 on the wrist by the wearing procedure shown in FIGS. 6 and 7 described above.
• the CPU 41 drives the optical sensor composed of the LEDs 15a and PD15b as the wrist detection units 14A to 14C, and monitors whether the reflected light is detected by irradiating light toward the wrist 52 of the left hand 51. (Step S2).
• FIG. 11A is a display example in the case where no wrist is detected in any of the wrist detection units 14A to 14C, and any of the wrist detection units 14A to 14C and signal signals SA to SC corresponding to 14C is shown. Since is not lit, the subject is prompted to place the wrist of his left hand on the wrist holder 12.
• FIG. 11A is a display example in the case where no wrist is detected in any of the wrist detection units 14A to 14C, and any of the wrist detection units 14A to 14C and signal signals SA to SC corresponding to 14C is shown. Since is not lit, the subject is prompted to place the wrist of his left hand on the wrist holder 12.
• 11B is a display example when a wrist is detected in the wrist detection units 14A and 14B, but a wrist is not detected in the wrist detection unit 14C, and the signals SA and W corresponding to the wrist detection units 14A and 14B are shown. Although the SB lights up, the signal SC corresponding to the wrist detection unit 14C is turned off, and the subject is urged to correct the wrist holding posture.
• Fig. 11C shows a display example when a wrist is detected in any of the wrist detection units 14A ⁇ ; 14C because the correct holding posture of the wrist is realized, and corresponds to the wrist detection units 14A ⁇ ; 14C
• any of the signals SA to SC is turned on, the subject is informed that it is possible to shift to pulse wave measurement.
• step S2 when a wrist is detected in step S2 (YE in step S2).
• S) waits for the start button (not shown) to be turned on, and the CPU 41 instructs the control circuit 35 to drive the pressurizing pump 32.
• 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).
• 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.
• step S5 determines whether or not the conditions for pulse wave detection are satisfied. If the conditions for pulse wave detection are satisfied (YES in step S5), 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 S6).
• 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 S7).
• 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 S7 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.
• the CPU 41 controls to drive the negative pressure pump 33 via the switching valve 34 (step S9). 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.
• pulse wave information may be output as an AI (Augmentation Index) value.
• the wrist holder for the pulse wave measuring device as in the present embodiment
• Equipped with pulse wave measuring device 1 with 2 easy to wear and stable wrist posture It is possible to maintain a pulse wave measuring device that can be held at the same time and does not reduce the accuracy of pulse wave measurement.
• a contact-type microswitch 15c can be used as a wrist detection unit.
• an opening is provided in the groove 13 so that the microswitch 15c contacts the wrist placed in the groove 13 of the wrist holding portion 12, and the tip of the switch extends from the opening to the surface of the groove 13. It is necessary to arrange it so that it protrudes slightly from.
• the wrist detection unit is provided at three positions on the wrist holding unit has been described as an example, but the number of wrist detection units is particularly limited. It is not something. Further, the arrangement position can be changed as appropriate.
• the force display unit described above exemplifies the case where the detection result of the wrist detection unit is displayed as a signal on the display unit. It is also possible to display the dance text or notify the subject by sound or voice.
• the pulse wave measurement can be performed only when the wrist is in the correct holding posture by the wrist detection unit before the pulse wave measurement is performed. Illustrated and explained force S, the wrist detection unit constantly monitors whether the wrist is correct! / Even during measurement, and if there is a problem with the wrist holding posture, the pulse wave
• the device may be configured to notify the subject that the measurement has failed by interrupting the measurement, or to inform the subject that there is a problem with the reliability of the measurement result, although the measurement continues. .
• the wrist for the pulse wave measurement device configured to be able to use the wrist of the left hand as a measurement site for pulse wave measurement.
• the table and the pulse wave measuring apparatus provided with the same have been described as an example, but the wrist of the right hand is used for the pulse wave measuring apparatus configured to be used as a measurement site for pulse wave measurement.
• the present invention can also be applied to a wrist holder and a pulse wave measuring apparatus having the wrist holder.
• a wrist holder for 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, and the same are provided. It is also possible to apply the present invention to a pulse wave measuring apparatus.

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• 2006
  • 2006-09-07 JP JP2006243148A patent/JP4626593B2/ja not_active Expired - Fee Related
• 2007
  • 2007-08-22 WO PCT/JP2007/066242 patent/WO2008029617A1/ja not_active Ceased
  • 2007-09-05 TW TW96133012A patent/TW200816957A/zh unknown

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