Sphygmomanometer for wrist

Abstract

A wrist sphygmomanometer (100) is provided with a main body (10), a band-shaped member (20), a sensing cuff (22), and a pressing cuff (23). The band-shaped member (20) has a first end portion and a second end portion located in the width direction. In a first state in which the band-shaped member (20) is wound around the left wrist such that the first end is positioned on the finger side of the left hand, the second end is positioned on the elbow side of the left hand, and the main body section (10) is disposed on the side surface (60c) on the thumb side of the left hand of the left arm (60), the sensing cuff (22) is disposed so as to be capable of pressing the radial artery (63) of the left wrist from the palm-side surface (60d) of the left arm (60). In a second state in which the second end portion is located on the finger side of the right hand, the first end portion is located on the elbow side of the right hand, and the main body portion (10) is disposed on the side surface (70c) of the right arm (70) on the thumb side of the right hand, 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 palm side of the right arm (70).

Description

Technical Field

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

[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, which includes a device body and a cuff connected to the device body and wound around the wrist, wherein the cuff is provided with a belt piece protruding toward the fingertip side by a predetermined distance at the side edge portion located on the fingertip side of the palm when wound around the wrist. In the wrist blood pressure monitor disclosed in Patent Document 1, the air bag provided in the cuff can be arranged at an appropriate position by aligning the top end of the belt piece with the base of the wrist.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2006-149682 Summary of the invention

[0006] Problems to be solved by the invention

[0007] Here, when the circumferential surface of the wrist is set as the surface of the arm on the palm side, the side surface of the arm on the thumb side, the side surface of the arm on the little finger side, and the surface of the arm on the back of the hand, in the wrist blood pressure monitor disclosed in Patent Document 1, when worn on the wrist, the device body is arranged to be located on the surface of the arm on the palm side, and the air bag provided in the cuff is arranged to also cover the surface of the arm on the palm side. Therefore, when the air bag is inflated, two arteries, the radial artery distributed on the root side of the thumb and the ulnar artery distributed on the root side of the little finger, are compressed.

[0008] The ulnar artery is located deeper inside the arm than the radial artery. Therefore, when a single cuff (air bag) is used to compress the palm surface of the arm, there is a subtle difference between the cuff pressure at which the radial artery and the ulnar artery begin to be flattened and the cuff pressure at which the artery is completely flattened. As a result, the acquired pulse wave amplitude changes from low pressure to high pressure, and its apex sometimes appears in two places depending on the person. As a result, measurement errors may occur.

[0009] As a study to improve such measurement errors, it is considered that a compression cuff and a sensing cuff with independent air systems are provided as the cuff structure, and the pulse wave signal of the radial artery is selectively acquired by the sensing cuff.

[0010] However, as disclosed in Patent Document 1, when the wrist blood pressure monitor is worn on the wrist so that the top of the band piece provided on one side in the width direction of the cuff is aligned with the base of the wrist so that the device body is located on the palm side surface of the arm, if the sensing cuff is provided so as to coincide with 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 offset from the radial artery of the right hand. Therefore, it is difficult to use the wrist blood pressure monitor on both the left and right wrists.

[0011] The present disclosure has been made in view 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 wrist and the right wrist and can measure blood pressure with high accuracy.

[0012] Technical Solution

[0013] A wrist sphygmomanometer based on an example of the present disclosure comprises: a main body; a belt-shaped member connected to the main body; and a bag-shaped sensing cuff and a pressing cuff provided on the belt-shaped member. The belt-shaped member is configured to be able to be wrapped around either a left wrist or a right wrist. The pressing cuff is configured 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 orthogonal to the circumferential direction when wrapped around the left wrist. In a first state in which the belt-shaped member is wrapped around the left wrist in a manner in which 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 arranged on the side of the left thumb side of the left arm, the sensing cuff is configured to be able to press the radial artery of the left wrist from the surface side of the palm side of the left arm. In the second state where the strip-like member is wrapped around the right wrist in a manner such 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 located on the side of the right thumb side of the right arm, the sensing cuff is configured to compress the radial artery of the right wrist from the surface side of the palm side of the right arm.

[0014] In the wrist sphygmomanometer according to an example of the present disclosure, preferably, in the first state, the sensing cuff is configured to compress the radial artery of the left wrist through the portion of the circumference of the left arm from the top of the side surface on the thumb side of the left hand to the radial flexor carpi. In addition, preferably, in the second state, the sensing cuff is configured to compress the radial artery of the right wrist through the portion of the circumference of the right arm from the top of the side surface on the thumb side of the right hand to the radial flexor carpi.

[0015] In the wrist blood pressure monitor according to an example of the present disclosure, the main body may also include a display unit. In this case, preferably, the display unit has one end located on the finger side of the left hand in the first state and the other end located on the elbow side of the left hand, and 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.

[0016] Effects of the Invention

[0017] According to the present disclosure, it is possible 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a perspective view of the appearance of the wrist sphygmomanometer according to the embodiment.

[0019] Figure 2 It is a schematic cross-sectional view of the wrist blood pressure monitor according to the embodiment.

[0020] Figure 3 It is a perspective view showing a first state in which the wrist blood pressure monitor according to the embodiment is worn on the left wrist.

[0021] Figure 4 It is along Figure 3 A schematic cross-sectional view taken along line IV-IV is shown.

[0022] Figure 5 It is a perspective view showing a second state in which the wrist blood pressure monitor according to the embodiment is worn on the right wrist.

[0023] Figure 6 It is along Figure 5 A cross-sectional view taken along line VI-VI is shown.

[0024] Figure 7 This is a block diagram showing a control structure of the wrist blood pressure monitor according to the embodiment.

[0025] Figure 8 This is a flowchart showing the measurement flow of the wrist blood pressure monitor according to the embodiment. DETAILED DESCRIPTION

[0026] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that in the embodiments described below, the same or common parts are denoted by the same reference numerals in the drawings, and their description will not be repeated.

[0027] Figure 1 It is a perspective view of the appearance of the wrist sphygmomanometer according to the embodiment. Figure 2 It is a schematic cross-sectional view of the wrist blood pressure monitor according to the embodiment. Figure 31 is a perspective view showing a first state in which the wrist sphygmomanometer of the embodiment is worn on the left wrist. Figure 1 Indicates from Figure 3 A perspective view of a wrist sphygmomanometer viewed from a roughly corresponding direction. Figures 1 to 3 , a wrist blood pressure monitor 100 according to an embodiment will be described.

[0028] like Figures 1 to 3 As shown, the wrist blood pressure monitor 100 according to the embodiment includes a main body 10 , a belt-shaped member 20 , a sensing cuff 22 , and a pressing cuff 23 .

[0029] The belt-shaped member 20 is provided so as to be able to be wrapped around either the left wrist or the right wrist. The belt-shaped member 20 has a width direction ( Figure 1 When the belt-shaped member 20 is wound around the left wrist, the belt-shaped member 20 is wound 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.

[0030] The belt-shaped member 20 includes an outer cover member that is located radially outward in the wound state, and an inner cover member that is located radially inward in the wound state and contacts the peripheral surface of the wrist.

[0031] 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, welding, etc.) their peripheral edges while being covered with a bias tape.

[0032] A hook-and-loop fastener (not shown) is provided on the outer circumferential surface near one end 20c in the longitudinal direction (circumferential direction in the wound state) of the belt-shaped member 20, and a hook-and-loop fastener 24 is provided on the inner circumferential surface near the other end 20d of the belt-shaped member 20 located on the opposite side to the one end 20c. The hook-and-loop fastener on the one end 20c side is composed of, for example, a hook fastener, and the hook-and-loop fastener 24 on the other end 20d side is composed of, for example, a loop fastener.

[0033] The strip-shaped member 20 is provided with a sensing cuff 22 and a pressing cuff 23. The sensing cuff 22 and the pressing cuff 23 are arranged between the outer cover member and the inner cover member constituting the strip-shaped member 20.

[0034] The pressing cuff 23 is provided so as to be able to press the sensing cuff 22 toward the wrist. Specifically, the pressing cuff 23 is provided so as to cover the sensing cuff 22 from the side opposite to the side where the wrist is located in a wrapped state.

[0035] The sensing cuff 22 and the pressing cuff 23 are configured to expand and contract by the inflow and outflow of fluid. The sensing cuff 22 and the pressing cuff 23 are connected to a pump 52 (see FIG. 1 ) contained in the housing 11. Figure 7 The sensing cuff 22 and the compression cuff 23 are inflated by air introduced as a fluid by the pump 52.

[0036] It should be noted that, in the above, an example is given in which the strip-like member 20 is constituted into a bag shape by an outer cover member and an inner cover member, but it is also possible that when the strip-like member 20 is constituted by a belt member, etc., the sensing cuff 22 and the pressing cuff 23 are arranged on the inner surface side of the strip-like member 20 located radially inward in the wound state.

[0037] 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, an upper surface 11c, and a bottom surface 11d. It should be noted that, as described later, a circuit board on which various electronic components are mounted, a pump 52 (see Figure 7 )wait.

[0038] The first side surface 11a is located on the first end 20a side of the strip-shaped member 20. The first side surface 11a connects the ends of the upper surface 11c and the bottom surface 11d located on the first end 20a side. The second side surface 11b is located on the second end 20b side of the strip-shaped member 20. The second side surface 11b connects the ends of the upper surface 11c and the bottom surface 11d located on the second end 20b side.

[0039] The upper surface 11c and the bottom surface 11d are in the vertical direction ( Figure 1 The display unit 12 and the operating unit 13 are arranged in a direction parallel to the width direction. The display unit 12 is located on the second end 20b side of the strip-shaped member 20. That is, the display unit 12 is located on the second side 11b side. The operating unit 13 is located on the first end 20a side of the strip-shaped member 20. That is, the operating unit 13 is located on the first side 11a side. The bottom surface 11d is provided with a curved portion 18 that is suitable for the side of the arm located on the thumb side.

[0040] The display unit 12 has one end 12a and the other end 12b. The one end 12a is located on the first end 20a side of the strip-shaped member 20, and the other end 12b is located on the second end 20b side of the strip-shaped member 20. That is, the 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.

[0041] The display unit 12 displays information related to blood pressure measurement, such as blood pressure measurement results, and other information. It should be noted that the display unit 12 is composed of a display such as an organic EL display and a liquid crystal display. The operation unit 13 includes, for example, a measurement switch 14 and a memory switch 15. The measurement switch 14 and the memory switch 15 are arranged side by side.

[0042] 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 a measurement value or the like or when displaying a stored measurement value or the like.

[0043] It should be noted that the operation unit 13 is not limited to a push switch, and may be, for example, a pressure-sensitive (resistive) or proximity (capacitive) touch panel switch, etc. In this case, the switch is displayed on the display unit 12. In addition, a microphone (not shown) may be provided to input an instruction to start blood pressure measurement by the user's voice. A power switch may also be provided on the operation unit 13.

[0044] Figure 4 It is along Figure 3 A schematic cross-sectional view of line IV-IV is shown. Figure 3 and Figure 4 , a state where the wrist blood pressure monitor 100 is wrapped around the left wrist is described.

[0045] like Figure 3 As shown, when the blood pressure is measured on the left wrist side, the belt-shaped member 20 is wrapped around the left wrist in the following manner: the first end 20a of the belt-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 arranged on the side 60c of the left thumb side of the left arm 60 (see Figure 4 The main body 10 is configured to be positioned relative to the left wrist via the bending portion 18 and to fit the side surface 60 c of the left arm 60 .

[0046] In the first state where the belt-shaped member 20 is wrapped around the left wrist, one end 12a of the display unit 12 is located on the finger side of the left hand, and the other end 12b of the display unit 12 is located on the elbow side of the left hand. In addition, on the upper surface 11c, the display unit 12 is located on the elbow side of the left hand, and the operation unit 13 is located on the finger side of the left hand.

[0047] The user can confirm that the wrist blood pressure monitor 100 is properly worn on the left wrist by confirming the positional relationship between the first end 20a and the second end 20b of the strip 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.

[0048] It should be noted that as a method of confirming that the wrist blood pressure monitor 100 is properly worn on the left wrist, a mark indicating the side opposite to the finger side (elbow side) when the wrist blood pressure monitor 100 is worn on the left wrist may be provided on a portion of the belt-like member 20 located on the second end 20b side, on the second side surface 11b of the housing 11, or on a portion of the upper surface 11c located on the second side surface 11b side.

[0049] In addition, a mark indicating that the wrist blood pressure monitor 100 is located on the finger side when it is worn on the left wrist may be provided on the portion of the strip member 20 located on the first end portion 20a side, the first side surface 11a of the housing 11, or the portion of the upper surface 11c located on the first side surface 11a side.

[0050] like Figure 4 As shown, the radius 61, ulna 62, radial artery 63, ulnar artery 64, radial flexor carpi radialis 65, and palmaris longus 66 are distributed inside the left arm 60 on the left wrist side. When the position of the hand is adjusted so that the thumb of the left hand faces upward, the radius 61 and the ulna 62 are arranged in the vertical direction, and the radius 61 is located above the ulna 62. In addition, the radial artery 63 is located on the palm side relative to the radius 61, and the ulnar artery 64 is located on the palm side relative to the ulna 62. The radial flexor carpi radialis 65 and the palmaris longus 66 are arranged between the radial artery 63 and the ulnar artery 64.

[0051] As described above, in the first state where the belt-shaped member 20 is wrapped around the left wrist, the sensing cuff 22 is configured to compress the radial artery 63 of the left wrist from the surface 60d side of the palm side of the left arm. More specifically, the sensing cuff 22 is configured on the left wrist to compress the radial artery 63 of the left wrist through the portion of the circumferential surface of the left arm 60 from the top of the side surface 60c on the thumb side of the left hand to the radial flexor carpi 65. Thus, the influence of the radius 61 and the radial flexor carpi 65 can be reduced, and the radial artery 63 can be stably compressed by the sensing cuff 22.

[0052] Figure 5 It is a perspective view showing a state where the wrist blood pressure monitor according to the embodiment is worn on the right wrist. Figure 6 It is along Figure 5 A cross-sectional view taken along line VI-VI is shown.

[0053] like Figure 5 As shown, when measuring blood pressure on the right wrist side, the belt-shaped member 20 is wrapped around the right wrist in the following manner: the second end 20b of the belt-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 arranged on the side surface 70c of the right thumb side of the right arm 70 (see Figure 6 The main body 10 is configured to be positioned relative to the right wrist via the bending portion 18 and to fit the side surface 70 c of the right arm 70 .

[0054] In the second state where 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. In addition, on the upper 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.

[0055] The user can confirm that the wrist blood pressure monitor 100 is properly worn on the right wrist by confirming the positional relationship between the first end 20a and the second end 20b of the strip 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.

[0056] It should be noted that as a method of confirming that the wrist blood pressure monitor 100 is properly worn on the right wrist, a mark indicating the side opposite to the finger side (elbow side) when the wrist blood pressure monitor 100 is worn on the right wrist may be provided on a portion of the belt-shaped member 20 located on the first end portion 20a side, on the first side surface 11a of the housing 11, or on the upper surface 11c located on the first side surface 11a side.

[0057] In addition, a mark indicating that the wrist blood pressure monitor 100 is located on the finger side when it is worn on the right wrist may be provided on the portion of the strip member 20 located on the second end portion 20b side, the second side surface 11b of the housing 11, or the portion of the upper surface 11c located on the second side surface 11b side.

[0058] like Figure 6 As shown, the radius 71, ulna 72, radial artery 73, ulnar artery 74, radial flexor carpi radialis 75, and palmaris longus 76 are distributed inside the right arm 70 on the right wrist side. When the position of the hand is adjusted so that the thumb of the right hand faces upward, the radius 71 and the ulna 72 are arranged in the vertical direction, and the radius 71 is located above the ulna 72. In addition, the radial artery 73 is located on the palm side relative to the radius 71, and the ulnar artery 74 is located on the palm side relative to the ulna 72. The radial flexor carpi radialis 75 and the palmaris longus 76 are arranged between the radial artery 73 and the ulnar artery 74.

[0059] As described above, in the second state where the belt-shaped member 20 is wrapped around the right wrist, the sensing cuff 22 is configured to compress the radial artery 73 of the right wrist from the surface 70d side of the palm side of the right arm. More specifically, the sensing cuff 22 is configured on the right wrist to compress the radial artery 73 of the right wrist through the portion of the circumferential surface of the right arm 70 from the top of the side surface 70c on the thumb side of the right hand to the radial flexor carpi 75. Thus, the influence of the radius 71 and the radial flexor carpi 75 can be reduced, and the radial artery 73 can be stably compressed by the sensing cuff 22.

[0060] Figure 7 1 is a block diagram showing a control structure of a wrist blood pressure monitor according to an embodiment. Figure 7 , the functional blocks of the wrist blood pressure monitor are explained.

[0061] like Figure 7 As shown, the main body 10 includes, in addition to the display unit 12 and the operation unit 13, a control unit 40, an A / D conversion circuit 41, a pump drive circuit 42, a valve drive circuit 43, A / D conversion circuits 44 and 45, a memory 46, a power supply 47, a pressure sensor 51, a pump 52, an exhaust valve 53, a pressure sensor 54, an acceleration sensor 55, and a switching valve 56. These are accommodated in the housing 11.

[0062] The power source 47 supplies electric power to each element mounted on the main body 10. The power source 47 is, for example, a rechargeable secondary battery.

[0063] The memory 46 non-temporarily stores various data such as programs for controlling the wrist blood pressure monitor 100 , setting data for setting various functions of the wrist blood pressure monitor 100 , data of blood pressure measurement results, etc. The memory 46 is also used as a working memory when executing programs.

[0064] The control unit 40 executes various functions according to a program for controlling the wrist blood pressure monitor 100 stored in the memory 46. The control unit 40 can execute blood pressure measurement by oscillometric measurement.

[0065] The control unit 40 drives the pump drive circuit 42 to control the operation of the pump 52. In addition, the control unit 40 drives the valve drive circuit 43 to control the operation 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 compression cuff 23 via piping.

[0066] The pump 52 is composed of, for example, a piezoelectric pump. The switching valve 56 switches the connection destination of the pump 52 and the exhaust valve 53 to the sensing cuff 22 or the compression cuff 23. The exhaust valve 53 is set to be openable / closable, and the state in which the sensing cuff 22 and the compression cuff 23 can be exhausted can be controlled by controlling the open / close state of the exhaust valve 53 and the switching valve 56.

[0067] The pressure sensor 51 (first pressure sensor) senses the pressure in the pressing cuff 23. The pressure sensor 51 is, for example, a piezoresistive pressure sensor. The pressure data detected by the pressure sensor 51 is converted into predetermined data by the A / D conversion circuit 41 and input to the control unit 40.

[0068] The pressure sensor 54 (second pressure sensor) senses the pressure of the cuff 22. The pressure sensor 54 is, for example, a piezoresistive pressure sensor. The 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.

[0069] The acceleration sensor 55 is, for example, a triaxial acceleration sensor. The acceleration sensor 55 senses acceleration information indicating accelerations in three mutually orthogonal directions. The acceleration information sensed by the acceleration sensor 55 is converted into predetermined data by the A / D conversion circuit 45 and input to the control unit 40 .

[0070] Acceleration information is an example of information indicating the movement of the person being measured. The control unit 40 can use the acceleration information to calculate the amount of activity in various activities such as housework and desk work, not just the walking of the person being measured. The amount of activity is, for example, an indicator related to the activity of the person being measured, such as the distance moved (walked), calories consumed, or the amount of fat burned. The control unit 40 can also use the acceleration information to estimate the person being measured before going to bed, during sleep, and after getting up. In addition, the control unit 40 can also use the acceleration information to estimate whether the person being measured is exercising.

[0071] Figure 8 1 is a flowchart showing the measurement flow of the wrist blood pressure monitor according to the embodiment. Figure 8 , the measurement process of the wrist sphygmomanometer is explained.

[0072] When the wrist sphygmomanometer 100 is worn on the left wrist or the right wrist and blood pressure measurement is started, first, initialization is performed in step (S11). It should be noted that the initialization is performed based on the detection of a measurement instruction such as the measurement switch 14 being pressed. Specifically, in step (S11), the control unit 40 initializes the processing memory area of ​​the memory 46. In addition, 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 adjust the switching valve 56 and open the exhaust valve 53, thereby exhausting the air in the compression cuff 23 and the sensing cuff 22. Thus, the pressure sensors 51 and 54 are adjusted to 0 mmHg, and the pressure sensors 51 and 54 are initialized.

[0073] Next, in step (S12), the exhaust valve 53 is closed. Specifically, the control unit 40 causes the exhaust valve 53 to be in a closed state via the valve drive circuit 43.

[0074] Next, in step (S13), the control unit 40 controls the pump drive circuit 42 to drive the pump 52. Step (S13) includes a step (S131) ​​of controlling the switching valve 56. In step (S131), first, the control unit 40 controls the valve drive circuit 43 to control the state of the switching valve 56 so that the fluid can be supplied to the sensing cuff 22. Thus, the sensing cuff 22 is pressurized by supplying air as a fluid from the pump 52 to the sensing cuff 22.

[0075] At this time, the control unit 40 determines whether the fluid supplied to the sensing cuff 22 reaches the target supply amount. For example, the control unit 40 determines whether the pressure of the sensing cuff 22 reaches a predetermined pressure (e.g., 15 mmHg) or whether the driving time of the pump 52 exceeds a predetermined time based on the output of the pressure sensors 51 and 54.

[0076] When the control unit 40 determines that the sensing cuff 22 has not reached the predetermined pressure or the driving time of the pump 52 has not passed the predetermined time, the pressurization is continued.

[0077] When the control unit 40 determines that the predetermined pressure has been reached or the predetermined time has passed, in step (S131), the control unit 40 controls the valve drive circuit 43 to control the switching valve 56 so as to maintain a constant amount of fluid in the sensing cuff 22. Specifically, the control unit 40 controls the state of the switching valve 56 so as to supply fluid to the pressing cuff 23. Thus, the pressing cuff 23 is pressurized by supplying air from the pump 52 to the pressing cuff 23.

[0078] As a result, the pressure of the pressing cuff 23 gradually increases. Due to the pressing force generated by the pressure increase, the pressing cuff 23 presses the sensing cuff 22 toward the left wrist or the right wrist, and the sensing cuff 22 compresses the radial artery. During this pressurization process, the control unit 40 senses the pressure of the sensing cuff 22 through the pressure sensor 54 and obtains a pulse wave signal as a fluctuation component.

[0079] 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 value, a known algorithm can be used by oscillometric measurement.

[0080] At this time, the control unit 40 determines whether the blood pressure value can be measured. If the control unit 40 determines that the blood pressure value cannot be measured (step (S14): No), as long as the pressure of the pressing cuff 23 does not reach the upper limit pressure (for example, 300 mmHg, which is a value preset for safety), the process returns to step (S13) and the pressing cuff 23 is pressurized.

[0081] On the other hand, when the control unit 40 determines that the blood pressure value can be measured (step (S14): Yes), step (S15) is implemented. In step (S15), the control unit 40 controls the pump drive circuit 42 to stop the pump 52.

[0082] Next, in step (S16), the control unit 40 controls the valve drive circuit 43, adjusts the switching valve 56, and opens the exhaust valve 53. Thus, the fluid in the compression cuff 23 and the sensing cuff 22 is discharged. Next, in step (S17), the measurement result of the blood pressure value is displayed on the display unit 12. The blood pressure can be measured through such steps (S11) to (S17).

[0083] As described above, in the wrist sphygmomanometer 100 of the embodiment, when measuring blood pressure on the left wrist side, the belt-shaped member 20 is wrapped around the left wrist in such a manner 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 arranged on the side of the left thumb side of the left arm. In this state, the sensing cuff 22 is arranged so as to be able to press the radial artery 63 of the left wrist from the surface 60d side of the palm side of the left arm 60.

[0084] Furthermore, when measuring blood pressure on the right wrist side, the belt-shaped member 20 is wrapped around the right wrist in such a manner that the second end portion 20b is located on the finger side of the right hand, the first end portion 20a is located on the elbow side of the right hand, and the main body 10 is arranged on the side of the right thumb side of the right arm. In this state, the sensing cuff 22 is arranged so as to be able to press the radial artery 73 of the right wrist from the surface 70d side of the palm side of the right arm 70.

[0085] Therefore, regardless of whether the belt-shaped member 20 is wrapped around the left wrist or the right wrist, the radial artery of the left wrist or the right wrist can be compressed by the sensing cuff 22. As a result, the wrist sphygmomanometer 100 can be used on both the left wrist and the right wrist, and blood pressure can be measured with high accuracy.

[0086] [Note]

[0087] As described above, the present embodiment includes the disclosure described below.

[0088] [Composition 1]

[0089] A wrist sphygmomanometer, comprising:

[0090] Main body;

[0091] a belt-shaped member connected to the main body; and

[0092] The bag-shaped sensing cuff and the pressing cuff are provided on the belt-shaped member.

[0093] The belt-shaped member is configured to be able to be wrapped around either the left wrist or the right wrist.

[0094] The pressing cuff is configured 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.

[0095] The belt-shaped member has a first end and a second end located in a width direction orthogonal to the circumferential direction when wrapped around the left wrist,

[0096] In a first state where the belt-like member is wrapped around the left wrist in a manner such that the first end portion is located on the finger side of the left hand, the second end portion is located on the elbow side of the left hand, and the main body portion is located on the side surface of the left arm on the thumb side of the left hand, the sensing cuff is configured to compress the radial artery of the left wrist from the surface side of the palm side of the left arm,

[0097] In a second state in which the strip-like member is wrapped around the right wrist in a manner such 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 arranged on the side of the right thumb side of the right arm, the sensing cuff is configured to be able to compress the radial artery of the right wrist from the surface side of the palm side of the right arm.

[0098] [Composition 2]

[0099] The wrist sphygmomanometer according to configuration 1, wherein:

[0100] In the first state, the sensing cuff is configured to compress the radial artery of the left wrist through a portion of the circumference of the left arm from the top of the side surface on the thumb side of the left hand to the radial flexor carpi.

[0101] In the second state, the sensing cuff is arranged so as to compress the radial artery of the right wrist through a portion of the circumferential surface of the right arm from the top of the side surface on the thumb side of the right hand to the flexor carpi radialis.

[0102] [Composition 3]

[0103] A wrist sphygmomanometer according to configuration 1 or 2, wherein:

[0104] The main body includes a display part.

[0105] 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,

[0106] In the second state, the one end of the display portion is located on the elbow side of the right hand, and the other end of the display portion is located on the finger side of the right hand.

[0107] The embodiments disclosed herein are intended to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims, and all modifications within the meaning and scope equivalent to the claims are included.

[0108] Description of Reference Numerals

[0109] 10: main body; 11: housing; 11a: first side; 11b: second side; 11c: upper surface; 11d: bottom surface; 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: pressing 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: side; 70d: surface; 71: radius; 72: ulna; 73: radial artery; 74: ulnar artery; 75: flexor carpi radialis; 76: palmaris longus; 100: wrist sphygmomanometer.

Claims

1. A wrist sphygmomanometer, comprising: Main body; a belt-shaped member connected to the main body; and The bag-shaped sensing cuff and the pressing cuff are provided on the belt-shaped member. The belt-shaped member is configured to be able to be wrapped around either the left wrist or the right wrist. The pressing cuff is configured to press the sensing cuff toward the left wrist or the right wrist 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 orthogonal to the circumferential direction when wrapped around the left wrist, In a first state where the belt-like member is wrapped around the left wrist in a manner such that the first end portion is located on the finger side of the left hand, the second end portion is located on the elbow side of the left hand, and the main body portion is located on the side surface of the left arm on the thumb side of the left hand, the sensing cuff is configured to compress the radial artery of the left wrist from the surface side of the palm side of the left arm, In a second state in which the strip-like member is wrapped around the right wrist in a manner such 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 arranged on the side of the right thumb side of the right arm, the sensing cuff is configured to be able to compress the radial artery of the right wrist from the surface side of the palm side of the right arm.

2. The wrist sphygmomanometer according to claim 1, wherein: In the first state, the sensing cuff is configured to compress the radial artery of the left wrist through a portion of the circumference of the left arm from the top of the side surface on the thumb side of the left hand to the radial flexor carpi. In the second state, the sensing cuff is arranged so as to compress the radial artery of the right wrist through a portion of the circumferential surface of the right arm from the top of the side surface on the thumb side of the right hand to the flexor carpi radialis.

3. The wrist sphygmomanometer according to claim 1 or 2, wherein: The main body includes a display part. 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, In the second state, the one end of the display portion is located on the elbow side of the right hand, and the other end of the display portion is located on the finger side of the right hand.

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