Sphygmomanometer for wrist

Abstract

To provide a sphygmomanometer for a wrist which can be worn to a left wrist and a right wrist, and accurately measure blood pressure.SOLUTION: A sphygmomanometer 100 for a wrist comprises: a main body portion 10; a belt-shaped member 20; a sensing cuff 22: and a pressure cuff 23. The belt-shaped member 20 has a first end portion and a second end portion positioned in a width direction. In a first state in which the belt-shaped member 20 is wound around a left wrist in such a manner that the first end portion is positioned on a finger side of a left hand, the second end portion is positioned on an elbow side of the left hand, and the main body portion 10 is arranged on a side face 60c of the left arm 60 on a thumb side of the left hand, the sensing cuff 22 is arranged in such a manner that the sensing cuff 22 can compress a radial vein 63 on the left wrist from a surface 60d side of the left arm 60 on a palm side. In a second state in which the second end portion is at a finger side of a right hand, the first end portion is provided at an elbow side of the right hand, and the main body portion 10 is arranged on a side face of the right arm on a thumb side of the right hand, the sensing cuff 22 is arranged in such a manner that the sensing cuff 22 can compress a radial artery on the right wrist from a surface side of the right arm on a palm side.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a wrist blood pressure monitor. [Background technology]

[0002] As a conventional wrist blood pressure monitor, Japanese Patent Application Laid-Open No. 2006-149682 (Patent Document 1) discloses a wrist blood pressure monitor that includes a device main body, a cuff band that is connected to the device main body and wrapped around the wrist, and a band piece that protrudes toward the fingertips by a predetermined distance is provided on the side edge of the cuff band that is located on the fingertips side of the palm when wrapped around the wrist. In the wrist blood pressure monitor disclosed in Patent Document 1, the air bag provided in the cuff band can be positioned at an appropriate position by aligning the tip of the band piece with the base of the wrist. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-149682 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the wrist circumferential surface, the surface of the arm located on the palm side, the side of the arm located on the thumb side, the side of the arm located on the little finger side, and the surface of the arm located on the back side of the hand, the wrist blood pressure monitor disclosed in Patent Document 1 is arranged so that the device body is located on the surface of the arm located on the palm side when worn on the wrist, and the air bag provided in the cuff is also arranged so as to cover the surface of the arm located on the palm side. Therefore, when the air bag is inflated, two arteries, the radial artery running on the base of the thumb and the ulnar artery running on the base of the little finger, are compressed.

[0005] The ulnar artery runs deeper inside the arm than the radial artery. Therefore, when a single cuff (air bag) is used to compress the surface of the arm on the palm side, there is a subtle difference in the cuff pressure at which the radial and ulnar arteries begin to collapse and at which they completely collapse. This causes the change in the amplitude of the acquired pulse wave to range from low pressure to high pressure, and in some people, two peaks may appear. This results in measurement errors.

[0006] One way to improve such measurement errors is to provide a cuff structure with a pressure cuff and a sensing cuff with independent air systems, and to selectively obtain the pulse wave signal of the radial artery using the sensing cuff.

[0007] However, as disclosed in Patent Document 1, when a wrist blood pressure monitor is worn on the wrist so that the tip of the band on one side of the cuff band in the width direction is aligned with the base of the wrist and the device body is positioned on the surface of the arm located on the palm side, if the sensing cuff is provided to match the position of the radial artery of the left hand, when the wrist blood pressure monitor is worn on the right hand, the sensing cuff will be misaligned with the radial artery of the right hand. This makes it difficult to use the wrist blood pressure monitor on both the left and right wrists.

[0008] The present disclosure has been made in consideration of the above-mentioned problems, and an object of the present disclosure is to provide a wrist blood pressure monitor that can be used on both the left and right wrists and can measure blood pressure with high accuracy. [Means for solving the problem]

[0009] A wrist blood pressure monitor according to an example of the present disclosure includes a main body, a band-shaped member connected to the main body, and a bag-shaped sensing cuff and a pressure cuff provided on the band-shaped member. The band-shaped member is configured to be able to be wrapped around either the left or right wrist. The pressure cuff is provided so that when the band-shaped member is wrapped around the left or right wrist, the pressure cuff can press the sensing cuff toward the left or right wrist. When the band-shaped member is wrapped around the left wrist, the band-shaped member has a first end and a second end located in a width direction perpendicular to the circumferential direction. In a first state in which the band-shaped member is wrapped around the left wrist, the first end is located on the finger side of the left hand, the second end is located on the elbow side of the left hand, and the main body is located on the side of the left arm on the thumb side of the left hand, the sensing cuff is arranged so as to be able to compress the radial vein of the left wrist from the surface side of the left arm on the palm side. In a second state in which the band-shaped member is wrapped around the right wrist so that the second end is located on the finger side of the right hand, the first end is located on the elbow side of the right hand, and the main body is positioned on the side of the right arm on the thumb side of the right hand, the sensing cuff is positioned so that it can compress the radial artery in the right wrist from the surface side of the right arm on the palm side.

[0010] In the wrist blood pressure monitor according to the example of the present disclosure, in the first state, the sensing cuff is preferably arranged so as to compress the radial artery of the left wrist in a portion of the circumferential surface of the left arm from the apex of the side surface of the thumb side of the left hand to the flexor carpi radialis muscle. Also, in the second state, the sensing cuff is preferably arranged so as to compress the radial artery of the right wrist in a portion of the circumferential surface of the right arm from the apex of the side surface of the thumb side of the right hand to the flexor carpi radialis muscle.

[0011] In the wrist blood pressure monitor according to one example of the present disclosure, the main body may include a display unit. In this case, it is preferable that the display unit has one end located on the finger side of the left hand and the other end located on the elbow side of the left hand in the first state, and that the one end of the display unit is located on the elbow side of the right hand and the other end of the display unit is located on the finger side of the right hand in the second state. Effect of the Invention

[0012] According to the present disclosure, it is possible to provide a wrist blood pressure monitor that can be attached to both the left and right wrists and can measure blood pressure with high accuracy. [Brief description of the drawings]

[0013] [Figure 1] 1 is an external perspective view of a wrist sphygmomanometer according to an embodiment; [Diagram 2] 1 is a schematic cross-sectional view of a wrist sphygmomanometer according to an embodiment. [Diagram 3] 1 is a perspective view showing a first state in which a wrist blood pressure monitor according to an embodiment is worn on the left wrist. FIG. [Figure 4] FIG. 4 is a schematic cross-sectional view taken along line IV-IV shown in FIG. [Diagram 5] 11 is a perspective view showing a second state in which the wrist sphygmomanometer according to the embodiment is worn on the right wrist. FIG. [Figure 6] 6 is a cross-sectional view taken along line VI-VI shown in FIG. 5. [Figure 7] 4 is a block diagram showing a control configuration of the wrist sphygmomanometer according to the embodiment. FIG. [Figure 8] FIG. 4 is a flow chart showing a measurement flow of the wrist blood pressure monitor according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiments described below, the same or common parts are denoted by the same reference characters in the drawings, and the description thereof will not be repeated.

[0015] FIG. 1 is an external perspective view of a wrist blood pressure monitor according to an embodiment. FIG. 2 is a schematic cross-sectional view of the wrist blood pressure monitor according to an embodiment. FIG. 3 is a perspective view showing a first state in which the wrist blood pressure monitor according to an embodiment is worn on the left wrist. Note that FIG. 1 shows a perspective view of the wrist blood pressure monitor as viewed from a direction substantially corresponding to that of FIG. 3. A wrist blood pressure monitor 100 according to an embodiment will be described with reference to FIGS. 1 to 3.

[0016] As shown in FIGS. 1 to 3, a wrist blood pressure monitor 100 according to an embodiment includes a main body 10, a band-shaped member 20, a sensing cuff 22, and a pressure cuff .

[0017] The belt-shaped member 20 is provided so that it can be wrapped around either the left or right wrist. When wrapped around the left wrist, the belt-shaped member 20 has a first end 20a and a second end 20b located in a width direction (DR1 direction in FIG. 1) perpendicular to the circumferential direction. When wrapping the belt-shaped member 20 around the left wrist, the belt-shaped member 20 is wrapped so that the first end 20a is located on the finger side of the left hand and the second end 20b is located on the elbow side of the left hand.

[0018] The belt-shaped member 20 includes an outer cover member that is located radially outward when in a wrapped state, and an inner cover member that is located radially inward when in a wrapped state and comes into contact with the circumferential surface of the wrist.

[0019] The belt-shaped member 20 is formed into a bag shape by overlapping an outer cover member and an inner cover member, and joining (for example, sewing or welding) them in a state where their peripheral edges are covered with bias tape.

[0020] A hook and loop fastener (not shown) is provided on the outer peripheral surface of the belt-shaped member 20 from one end 20c in the longitudinal direction (circumferential direction in a wound state), and a hook and loop fastener 24 is provided on the inner peripheral surface of the belt-shaped member 20 near the other end 20d located on the opposite side to the one end 20c. The hook and loop fastener on the one end 20c side is configured, for example, by a hook fastener, and the hook and loop fastener 24 on the other end 20d side is configured, for example, by a loop fastener.

[0021] The belt-shaped member 20 is provided with a sensing cuff 22 and a pressure cuff 23. The sensing cuff 22 and the pressure cuff 23 are disposed between the outer cover member and the inner cover member that constitute the belt-shaped member 20.

[0022] The pressure cuff 23 is provided so as to be able to press the sensing cuff 22 towards the wrist. Specifically, the pressure cuff 23 is provided so as to cover the sensing cuff 22 from the side opposite to the side on which the wrist is positioned in the wrapped state.

[0023] Sensing cuff 22 and pressure cuff 23 are provided so as to be inflatable and deflated by the flow of fluid therein. Sensing cuff 22 and pressure cuff 23 are connected to pump 52 (see FIG. 7) housed in housing 11. Sensing cuff 22 and pressure cuff 23 are inflated by the introduction of air as a fluid by pump 52.

[0024] In the above, an example was given of the belt-shaped member 20 being configured in a bag shape by an outer cover member and an inner cover member, but if the belt-shaped member 20 is configured by a belt member or the like, the sensing cuff 22 and the pressing cuff 23 may be provided on the inner surface side of the belt-shaped member 20 located radially inward when in the wrapped state.

[0025] The main body 10 includes a housing 11 having a substantially box-like shape. The housing 11 has a first side surface 11a, a second side surface 11b, a top surface 11c, and a bottom surface 11d. As will be described later, the housing 11 contains a circuit board having various electronic components mounted thereon, a pump 52 (see FIG. 7), and the like.

[0026] The first side surface 11a is located on the first end portion 20a side of the strip-shaped member 20. The first side surface 11a connects the ends of the top surface 11c and the bottom surface 11d located on the first end portion 20a side. The second side surface 11b is located on the second end portion 20b side of the strip-shaped member 20. The second side surface 11b connects the ends of the top surface 11c and the bottom surface 11d located on the second end portion 20b side.

[0027] The top surface 11c and the bottom surface 11d face each other in the up-down direction (DR2 direction in FIG. 1). The top surface 11c is provided with a display unit 12 and an operation unit 13. The display unit 12 and the operation unit 13 are arranged side by side in a direction parallel to the width direction. The display unit 12 is located on the second end 20b side of the band-shaped member 20. That is, the display unit 12 is located on the second side surface 11b side. The operation unit 13 is located on the first end portion 20a side of the band-shaped member 20. That is, the operation unit 13 is located on the first side surface 11a side. The bottom surface 11d is provided with a curved portion 18 that fits the side of the arm located on the thumb side.

[0028] The display unit 12 has one end 12a and the other end 12b. One end 12a is located on the first end 20a side of the belt-shaped member 20, and the other end 12b is located on the second end 20b side of the belt-shaped member 20. In other words, one end 12a is located on the first side surface 11a side, and the other end 12b is located on the second side surface 11b side.

[0029] Display unit 12 displays information related to blood pressure measurement, such as blood pressure measurement results, and other information. Display unit 12 is configured with a display device such as an organic EL display or a liquid crystal display. Operation unit 13 has, for example, a measurement switch 14 and a memory switch 15. Measurement switch 14 and memory switch 15 are arranged side by side.

[0030] The measurement switch 14 is a button that is pressed when starting measurement. The memory switch 15 is a button that is pressed when storing measured values ​​or the like, or when displaying stored measured values ​​or the like.

[0031] The operation unit 13 is not limited to a push switch, and may be, for example, a pressure-sensitive (resistance) or proximity (capacitance) touch panel switch, in which case the switch is displayed on the display unit 12. Also, a microphone (not shown) may be provided so that a command to start blood pressure measurement can be input by voice of the user. The operation unit 13 may be provided with a power switch.

[0032] Fig. 4 is a schematic cross-sectional view taken along line IV-IV shown in Fig. 3. A state in which wrist blood pressure monitor 100 is wrapped around the left wrist will be described with reference to Figs. 3 and 4.

[0033] 3, when measuring blood pressure on the left wrist, the band-shaped member 20 is wrapped around the left wrist so that the first end 20a of the band-shaped member 20 is located on the finger side of the left hand, the second end 20b is located on the elbow side of the left hand, and the main body 10 is placed on the side surface 60c of the left arm 60 on the thumb side of the left hand (see FIG. 4). The main body 10 is positioned with respect to the left wrist by the curved portion 18 described above, and is placed so as to fit the side surface 60c of the left arm 60.

[0034] In this first state in which belt-shaped member 20 is wrapped around the left wrist, one end 12a of display unit 12 is located on the finger side of the left hand, and the other end 12b of display unit 12 is located on the elbow side of the left hand. Also, on top surface 11c, display unit 12 is located on the elbow side of the left hand, and operation unit 13 is located on the finger side of the left hand.

[0035] The user can confirm that the wrist blood pressure monitor 100 is properly worn on the left wrist by checking the positional relationship between the first end 20a and the second end 20b of the band-shaped member 20, the positional relationship between one end 12a and the other end 12b of the display unit 12, or the positional relationship between the display unit 12 and the operating unit 13.

[0036] As a means of confirming that wrist blood pressure monitor 100 is properly worn on the left wrist, a mark indicating that the wrist blood pressure monitor 100 is located on the opposite side to the fingers (elbow side) when worn on the left wrist may be provided on a portion located on the second end 20b side of band-shaped member 20, on the second side surface 11b of housing 11, or on the second side surface 11b side of top surface 11c.

[0037] In addition, a mark indicating that the portion located on the first end 20a side of the band-shaped member 20, the first side surface 11a of the housing 11, or the portion located on the first side surface 11a side of the upper surface 11c is located on the finger side when the wrist blood pressure monitor 100 is worn on the left wrist may be provided.

[0038] As shown in Fig. 4, inside the left arm 60 on the left wrist side, the radius 61, ulna 62, radial artery 63, ulnar artery 64, flexor carpi radialis 65, and palmaris longus 66 run. When the position of the left hand is adjusted so that the thumb faces upward, the radius 61 and ulna 62 are lined up in the vertical direction, and the radius 61 is located above the ulna 62. The radial artery 63 is located on the palm side of the radius 61, and the ulnar artery 64 is located on the palm side of the ulna 62. The flexor carpi radialis 65 and palmaris longus 66 are located between the radial artery 63 and the ulnar artery 64.

[0039] In the first state in which the band-shaped member 20 is wrapped around the left wrist as described above, the sensing cuff 22 is disposed so as to be able to compress the radial artery 63 of the left wrist from the surface 60d of the left arm on the palm side. More specifically, the sensing cuff 22 is disposed so as to be able to compress the radial artery 63 of the left wrist in a portion of the circumferential surface of the left arm 60 from the apex of the side surface 60c on the thumb side of the left hand to the flexor carpi radialis muscle 65. This allows the radial artery 63 to be stably compressed by the sensing cuff 22 while reducing the influence of the radius 61 and the flexor carpi radialis muscle 65.

[0040] Fig. 5 is a perspective view showing a state in which the wrist blood pressure monitor according to the embodiment is attached to the right wrist, Fig. 6 is a cross-sectional view taken along line VI-VI shown in Fig. 5.

[0041] 5, when measuring blood pressure on the right wrist, the band-shaped member 20 is wrapped around the right wrist so that the second end 20b of the band-shaped member 20 is located on the finger side of the right hand, the first end 20a is located on the elbow side of the right hand, and the main body 10 is placed on the side surface 70c of the right arm 70 on the thumb side of the right hand (see FIG. 6). The main body 10 is positioned with respect to the right wrist by the curved portion 18 described above, and is placed so as to fit the side surface 70c of the right arm 70.

[0042] In this second state in which the belt-shaped member 20 is wrapped around the right wrist, one end 12a of the display unit 12 is located on the elbow side of the right hand, and the other end 12b of the display unit 12 is located on the finger side of the right hand. Also, on the top surface 11c, the display unit 12 is located on the finger side of the right hand, and the operation unit 13 is located on the elbow side of the right hand.

[0043] The user can confirm that the wrist blood pressure monitor 100 is properly worn on the right wrist by checking the positional relationship between the first end 20a and the second end 20b of the band-shaped member 20, the positional relationship between one end 12a and the other end 12b of the display unit 12, or the positional relationship between the display unit 12 and the operating unit 13.

[0044] As a means of confirming that wrist blood pressure monitor 100 is properly worn on the right wrist, a mark may be provided on the portion located on the first end 20a side of band-shaped member 20, on first side surface 11a of housing 11, or on the portion located on the first side surface 11a side of top surface 11c to indicate that the wrist blood pressure monitor 100 is located on the opposite side from the finger side (elbow side) when worn on the right wrist.

[0045] In addition, a mark indicating that the portion located on the second end 20b side of the band-shaped member 20, the second side surface 11b of the housing 11, or the portion located on the second side surface 11b side of the upper surface 11c is located on the finger side when the wrist blood pressure monitor 100 is worn on the right wrist may be provided.

[0046] As shown in Fig. 6, inside the right arm 70 on the right wrist side, the radius 71, ulna 72, radial artery 73, ulnar artery 74, flexor carpi radialis 75, and palmaris longus 77 run. When the position of the right hand is adjusted so that the thumb faces upward, the radius 71 and ulna 72 are lined up in the vertical direction, and the radius 71 is located above the ulna 72. The radial artery 73 is located on the palm side of the radius 71, and the ulnar artery 74 is located on the palm side of the ulna 72. The flexor carpi radialis 75 and palmaris longus 77 are located between the radial artery 73 and the ulnar artery 74.

[0047] In the second state in which the band-shaped member 20 is wrapped around the right wrist as described above, the sensing cuff 22 is disposed so as to be able to compress the radial artery 73 of the right wrist from the surface 70d of the right arm on the palm side. More specifically, the sensing cuff 22 is disposed so as to be able to compress the radial artery 73 of the right wrist in a portion of the circumferential surface of the right arm 70 from the apex of the side surface 70c on the thumb side of the right hand to the flexor carpi radialis muscle 75. This allows the radial artery 73 to be stably compressed by the sensing cuff 22 while reducing the influence of the radius 71 and the flexor carpi radialis muscle 75.

[0048] 7 is a block diagram showing the control configuration of the wrist blood pressure monitor according to the embodiment. With reference to FIG. 7, the functional blocks of the wrist blood pressure monitor will be described.

[0049] 7, in addition to the above-mentioned display unit 12 and operation unit 13, main body 10 includes control unit 40, A / D conversion circuit 41, pump drive circuit 42, valve drive circuit 43, A / D conversion circuits 44, 45, memory 46, power source 47, pressure sensor 51, pump 52, exhaust valve 53, pressure sensor 54, acceleration sensor 55, and switching valve 56. These are contained in housing 11.

[0050] The power source 47 supplies power to each element mounted on the main body 10. The power source 47 is, for example, a rechargeable secondary battery.

[0051] Memory 46 non-temporarily stores various data such as programs used to control wrist blood pressure monitor 100, setting data for setting various functions of wrist blood pressure monitor 100, blood pressure measurement result data, etc. Memory 46 is also used as a work memory when a program is executed.

[0052] The control unit 40 executes various functions according to a program for controlling the wrist-mounted blood pressure monitor 100, which is stored in the memory 46. The control unit 40 can execute blood pressure measurement based on the oscillometric method.

[0053] The control unit 40 drives the pump drive circuit 42 to control the operation of the pump 52. The control unit 40 also drives the valve drive circuit 43 to control the operations of the exhaust valve 53 and the switching valve 56. The pump 52, the exhaust valve 53, and the switching valve 56 are connected to the sensing cuff 22 and the pressing cuff 23 via piping.

[0054] Pump 52 is, for example, a piezoelectric pump. Switching valve 56 switches the connection destination of pump 52 and exhaust valve 53 between sensing cuff 22 and pressure cuff 23. Exhaust valve 53 is provided so as to be openable and closable, and by controlling the open / closed state of exhaust valve 53 and switching valve 56, it is possible to control the state in which sensing cuff 22 and pressure cuff 23 can be exhausted.

[0055] Pressure sensor 51 (first pressure sensor) detects the pressure inside pressure cuff 23. Pressure sensor 51 is, for example, a piezo-resistance pressure sensor. Pressure data detected by pressure sensor 51 is converted into predetermined data by A / D conversion circuit 41 and input to control unit 40.

[0056] The pressure sensor 54 (second pressure sensor) detects the pressure inside the sensing cuff 22. The pressure sensor 54 is, for example, a piezo-resistance pressure sensor. Pressure data detected by the pressure sensor 54 is converted into predetermined data by the A / D conversion circuit 44 and input to the control unit 40.

[0057] The acceleration sensor 55 is, for example, a three-axis acceleration sensor. The acceleration sensor 55 detects acceleration information representing acceleration in three mutually orthogonal directions. The acceleration information detected by the acceleration sensor 55 is converted into predetermined data by the A / D conversion circuit 45 and input to the control unit 40.

[0058] The acceleration information is an example of information that indicates the movement of the person being measured. Using the acceleration information, the control unit 40 can calculate the amount of activity of the person being measured not only when walking but also when performing various activities such as housework and desk work. The amount of activity is an index related to the activity of the person being measured, such as the distance traveled (walked), calories burned, or the amount of fat burned. Using the acceleration information, the control unit 40 can also estimate the person being measured before going to sleep, while sleeping, and after waking up. Furthermore, using the acceleration information, the control unit 40 can also estimate whether the person being measured is exercising or not.

[0059] 8 is a flow chart showing a measurement flow of the wrist blood pressure monitor according to the embodiment. The measurement flow of the wrist blood pressure monitor will be described with reference to FIG.

[0060] When the wrist blood pressure monitor 100 is worn on the left or right wrist and blood pressure measurement is started, first, initialization is performed in step (S11). The initialization is performed based on detection of a measurement instruction, such as pressing the measurement switch 14. Specifically, in step (S11), the control unit 40 initializes the processing memory area of ​​the memory 46. Also in step (S11), the control unit 40 controls the pump drive circuit 42 to turn off the pump 52, and controls the valve drive circuit 43 to open the exhaust valve 53 while adjusting the switching valve 56, thereby exhausting the air in the pressure cuff 23 and the sensing cuff 22. As a result, the pressure sensors 51 and 54 are adjusted to 0 mmHg, and the pressure sensors 51 and 54 are initialized.

[0061] Next, in step (S12), the exhaust valve 53 is closed. Specifically, the control unit 40 controls the valve drive circuit 43 to close the exhaust valve 53.

[0062] Next, in step (S13), control unit 40 controls pump drive circuit 42 to drive pump 52. Step (S13) includes a step (S131) ​​of controlling switching valve 56. In step (S131), first, control unit 40 controls valve drive circuit 43 to control the state of switching valve 56 so as to enable supply of fluid to sensing cuff 22. As a result, air is supplied as a fluid from pump 52 to sensing cuff 22, thereby pressurizing sensing cuff 22.

[0063] At this time, control unit 40 determines whether the fluid supplied to sensing cuff 22 has reached a target supply amount. For example, control unit 40 determines whether the pressure in sensing cuff 22 has reached a predetermined pressure (e.g., 15 mmHg) from the outputs of pressure sensors 51 and 54, or whether the driving time of pump 52 has elapsed for a predetermined time.

[0064] If the control unit 40 determines that the pressure in the sensing cuff 22 has not reached the predetermined pressure, or that the driving time of the pump 52 has not elapsed beyond the predetermined time, the pressurization continues.

[0065] When control unit 40 determines that the predetermined pressure has been reached or that a predetermined time has elapsed, in step (S131), control unit 40 controls valve drive circuit 43 to control switching valve 56 so as to maintain a constant amount of fluid in sensing cuff 22. Specifically, control unit 40 controls the state of switching valve 56 so as to enable supply of fluid to pressure cuff 22. As a result, air is supplied from pump 52 to pressure cuff 23, thereby pressurizing pressure cuff 23.

[0066] This gradually increases the pressure in pressure cuff 23. The pressure generated by this increase in pressure causes pressure cuff 23 to press sensing cuff 22 toward the left or right wrist, causing sensing cuff 22 to compress the radial artery. During this pressurization process, control unit 40 detects the pressure in sensing cuff 22 using pressure sensor 54 and acquires a pulse wave signal as a fluctuation component.

[0067] Next, in step (S14), the control unit 40 calculates blood pressure values ​​(systolic blood pressure SBP and diastolic blood pressure DBP) based on the acquired pulse wave signal. As a method for calculating the blood pressure values, a known algorithm can be used by the oscillometric method.

[0068] At this time, the control unit 40 judges whether the blood pressure value has been measured. If the control unit 40 judges that the blood pressure value has not been measured (step (S14): NO), the process returns to step (S13) and pressurizes the pressure cuff 23 unless the pressure in the pressure cuff 23 has reached the upper limit pressure (for example, 300 mmHg, which is a value that is predetermined for safety).

[0069] On the other hand, when the control unit 40 determines that the blood pressure value has been measured (step (S14): YES), the control unit 40 performs step (S15). In step (S15), the control unit 40 controls the pump drive circuit 42 to stop the pump 52.

[0070] Subsequently, in step (S16), control unit 40 controls valve drive circuit 43 to open exhaust valve 53 while adjusting switching valve 56. This causes the fluid in pressure cuff 23 and sensing cuff 22 to be discharged. Next, in step (S17), the measurement result of the blood pressure value is displayed on display unit 12. Through these steps (S11) to (S17), the blood pressure can be measured.

[0071] As described above, in the wrist blood pressure monitor 100 according to the embodiment, when blood pressure is measured on the left wrist, the band-shaped member 20 is wrapped around the left wrist so that the first end 20a is located on the finger side of the left hand, the second end 20b is located on the elbow side of the left hand, and the main body 10 is located on the side of the left arm on the thumb side of the left hand. In this state, the sensing cuff 22 is positioned so as to be able to compress the radial artery 63 of the left wrist from the surface 60d side of the left arm 60 on the palm side.

[0072] When measuring blood pressure on the right wrist, the band-shaped member 20 is wrapped around the right wrist so that the second end 20b is located on the finger side of the right hand, the first end 20a is located on the elbow side of the right hand, and the main body 10 is placed on the side of the right arm on the thumb side of the right hand. In this state, the sensing cuff 22 is placed so as to be able to compress the radial artery 73 of the right wrist from the surface 70d side of the right arm 70 on the palm side.

[0073] Therefore, whether the band-shaped member 20 is wrapped around the left or right wrist, the radial artery of the left or right wrist can be compressed by the sensing cuff 22. As a result, the wrist blood pressure monitor 100 can be used for both the left and right wrists, and blood pressure can be measured with high accuracy.

[0074] [Note] As described above, the present embodiment includes the following disclosure.

[0075] [Configuration 1] A main body portion, A belt-shaped member connected to the main body portion; A bag-shaped sensing cuff and a pressure cuff are provided on the belt-shaped member, The belt-shaped member is configured to be able to be wrapped around either the left or right wrist, the pressure cuff is provided so as to be able to press the sensing cuff toward the left wrist side or the right wrist side when the belt-shaped member is wrapped around the left wrist or the right wrist, the belt-shaped member has a first end and a second end located in a width direction perpendicular to a circumferential direction when wrapped around a left wrist, in a first state in which the belt-shaped member is wrapped around the left wrist so that the first end is located on the finger side of the left hand, the second end is located on the elbow side of the left hand, and the main body is located on the side of the left arm on the thumb side of the left hand, the sensing cuff is positioned so as to be able to compress the radial vein of the left wrist from the surface side of the left arm on the palm side, A wrist blood pressure monitor in which, in a second state in which the band-shaped member is wrapped around the right wrist so that the second end is located on the finger side of the right hand, the first end is located on the elbow side of the right hand, and the main body is positioned on the side of the right arm on the thumb side of the right hand, the sensing cuff is positioned so as to be able to compress the radial artery of the right wrist from the surface side of the right arm on the palm side.

[0076] [Configuration 2] In the first state, the sensing cuff is disposed in a portion of the circumferential surface of the left arm from the apex of the side surface of the thumb side of the left hand to the flexor carpi radialis muscle so as to be able to compress the radial vein of the left wrist; In the second state, the sensing cuff is positioned so as to be able to compress the radial vein of the right wrist in a portion of the circumferential surface of the right arm from the apex of the side surface on the thumb side of the right hand to the flexor carpi radialis muscle.

[0077] [Configuration 3] The main body portion includes a display portion, the display unit has, in the first state, one end located on a finger side of a left hand and the other end located on an elbow side of the left hand, 3. The wrist blood pressure monitor of claim 1, wherein in the second state, the one end of the display unit is located on the elbow side of the right hand, and the other end of the display unit is located on the finger side of the right hand.

[0078] The embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, and includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0079] 10 main body, 11 housing, 11a first side, 11b second side, 11c top, 11d bottom, 12 display, 12a one end, 12b other end, 13 operation unit, 14 measurement switch, 15 memory switch, 18 bending portion, 20 belt-shaped member, 20a first end, 20b second end, 20c one end, 20d other end, 22 sensing cuff, 23 pressure cuff, 24 hook-and-loop fastener, 40 control unit, 41 A / D conversion circuit, 42 pump drive circuit, 43 valve drive circuit, 44, 45 A / D conversion circuit, 46 memory, 47 power supply, 51 pressure sensor, 52 pump, 53 exhaust valve, 54 pressure sensor, 55 acceleration sensor, 56 switching valve, 60 left arm, 60c side, 60d surface, 61 Radius, 62 ulna, 63 radial artery, 64 ulnar artery, 65 flexor carpi radialis, 66 palmaris longus, 70 right arm, 70c lateral, 70d surface, 71 radius, 72 ulna, 73 radial artery, 74 ulnar artery, 75 flexor carpi radialis, 77 palmaris longus, 100 Wrist blood pressure monitor.

Claims

1. A main body portion, A belt-shaped member connected to the main body portion; A bag-shaped sensing cuff and a pressure cuff are provided on the belt-shaped member, The belt-shaped member is configured to be able to be wrapped around either the left or right wrist, the pressure cuff is provided so as to be able to press the sensing cuff toward the left wrist side or the right wrist side when the belt-shaped member is wrapped around the left wrist or the right wrist, the belt-shaped member has a first end and a second end located in a width direction perpendicular to a circumferential direction when wrapped around a left wrist, in a first state in which the band-shaped member is wrapped around the left wrist so that the first end is located on the finger side of the left hand, the second end is located on the elbow side of the left hand, and the main body is located on the side of the left arm on the thumb side of the left hand, the sensing cuff is positioned so as to be able to compress the radial artery of the left wrist from the surface side of the left arm on the palm side, A wrist blood pressure monitor in which, in a second state in which the band-shaped member is wrapped around the right wrist so that the second end is located on the finger side of the right hand, the first end is located on the elbow side of the right hand, and the main body is positioned on the side of the right arm on the thumb side of the right hand, the sensing cuff is positioned so as to be able to compress the radial artery of the right wrist from the surface side of the right arm on the palm side.

2. In the first state, the sensing cuff is disposed in a portion of the circumferential surface of the left arm from the apex of the side surface of the left hand on the thumb side to the flexor carpi radialis muscle so as to be able to compress the radial artery of the left wrist; 2. The wrist blood pressure monitor of claim 1, wherein in the second state, the sensing cuff is positioned so as to be able to compress the radial artery of the right wrist in a portion of the circumferential surface of the right arm from the apex of the side surface on the thumb side of the right hand to the flexor carpi radialis muscle.

3. The main body portion includes a display portion, the display unit has, in the first state, one end located on a finger side of a left hand and the other end located on an elbow side of the left hand, 3. The wrist blood pressure monitor according to claim 1, wherein in the second state, the one end of the display unit is located on an elbow side of the right hand, and the other end of the display unit is located on a finger side of the right hand.

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