JPH10146322A - Carotid pulse detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carotid pulse detecting device capable of stably detecting a carotid pulse. SOLUTION: A lateral direction moving member 60 movable in the lateral direction perpendicular to the pressing direction is inserted between multiple parallel pressing direction moving members 58, and a pair of side faces 72 of the lateral direction moving member 60 are kept in slide contact with the side faces 66 of the pressing direction moving members 58. When a carotid pulse detecting device 10 is fitted to the neck and a pulse detecting probe 14 is pressed to the neck surface, the moving positions in the pressing direction of multiple pressing direction moving members 58 are determined so that the pressures on their pressing faces 64 are made equal. The carotid is pressed by the pressing faces of multiple pressing direction moving members 58 aligned in the direction crossing the carotid, and the pressing conditions of the pressing direction moving members 58 to the carotid are properly stabilized in spite of the complex and variable irregular shape on the surface of the neck.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carotid artery wave detecting device for detecting a pulse wave generated from a carotid artery.

[0002]

2. Description of the Related Art Detection of carotid artery waveforms for diagnostic purposes,
For detecting a carotid artery wave as a reference point of pulse wave propagation velocity, by pressing a pressure detecting element held by hand or held by a predetermined spring type holder against the carotid artery with a predetermined pressing force. There have been proposed various carotid artery wave detecting devices for detecting a pulse wave generated from the carotid artery.

[0003]

However, since the carotid artery has a complicated uneven shape and exists under the epidermis under the cervix where the uneven shape is liable to change, the pressing condition of the pressure detecting element against the carotid artery changes. Therefore, it has been difficult to stably detect the carotid artery wave for a relatively long time.

[0004] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a carotid artery wave detecting device capable of stably detecting carotid artery waves. .

[0005]

The gist of the present invention for achieving the above object is a carotid artery wave detecting device which is pressed against a carotid artery of a living body and detects a pulse wave from the carotid artery. (A) a plurality of movements in a plurality of pressing directions arranged in parallel including a pressing surface provided with a pressure detecting element pressed against the carotid artery, and a pair of side surfaces whose mutual distance decreases as the distance from the pressing surface increases A member, and (b) a receiving hole having an open end, and a pair of opposed inclined surfaces formed on a side wall surface of the receiving hole and increasing in distance from the inside toward the outside; A housing that holds the plurality of pressing direction moving members in a state where the side surfaces of the pressing direction moving members located at both ends and the pair of inclined surfaces are in sliding contact with each other, and (c) inside the accommodation hole. It has a pair of side surfaces that increase the distance between each other And a lateral moving member interposed between the pressing direction moving members in a state where the pair of side surfaces are in sliding contact with the side surfaces of the pressing direction moving members. Is included.

[0006]

According to this structure, the horizontal moving member movably provided in the direction perpendicular to the pressing direction is interposed between the plurality of pressing direction moving members arranged in parallel, and Since the pair of side surfaces of the moving member are slid on the side surfaces of the pressing direction moving member, the moving positions in the pressing direction of the plurality of pressing direction moving members are determined so that the pressures on the pressing surfaces are equal. You. Accordingly, the carotid artery is pressed by the pressing surfaces of the plurality of pressing direction moving members arranged in a direction intersecting with the carotid artery, so that the unevenness of the surface of the neck is complicated and easily changed. Despite this, the pressing condition of the pressing direction moving member against the carotid artery is suitably stabilized. Therefore, the carotid artery wave can be stably detected by the pressure detecting element provided on the pressing surface of the pressing direction moving member.

[0007]

In another preferred embodiment of the present invention, the housing preferably includes a pair of side walls sandwiching the plurality of pressing-direction moving members and a lateral moving member interposed therebetween, and a lateral movement thereof. A linear guide hole formed in a side wall thereof for guiding the member in a direction perpendicular to the pressing direction, wherein the laterally moving member engages with the guide hole. It has a projection. In this case, there is an advantage that the carotid artery wave detection device is configured to be relatively small.

Preferably, the carotid artery wave detecting device is curved in one plane as a whole to grip the neck of the living body, and is urged in a diameter decreasing direction by an elastic restoring force. A gripping device attached to one end, and the housing is arranged at one end of the gripping device.
It is possible to swing around a swing center axis located inside the gripping device in the one plane and perpendicular to the one plane,
A swing connection device for connecting the housing and one end of the gripping device. According to this configuration, since the housing and one end of the gripping device are swingably connected by the swing connection device, the unevenness of the surface of the neck is complicated and easily changed. Also, the pressing condition of the pressing direction moving member against the carotid artery is further stabilized. In addition, the housing and one end of the holding device can be swung about a swing center axis located inside the holding device in a curved plane of the holding device and perpendicular to the one plane. Because of the connection, it is possible to easily follow a change in the uneven shape on the surface of the neck, and there is an advantage that the pressing condition is hard to change.

Preferably, the swing connection device is formed on an outer wall surface of a side wall of the housing, and a pair of partial outer circumferential surfaces centered on the swing center axis, and one end of the gripping device. And a pair of partial inner peripheral surfaces formed at the branch and slidingly in contact with the pair of partial outer peripheral surfaces. In this case, there is an advantage that the swing connection device is easily configured.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram illustrating an external configuration of a carotid artery wave detection device 10 that is pressed against a carotid artery of a living body and detects a pulse wave from the carotid artery.

Referring to FIG. 1, a carotid artery wave detecting apparatus 10 comprises:
A grasping device 12 that is curved in one plane as a whole to grasp the neck of a living body and is urged in a radially-reducing direction by an elastic return force, a pulse wave detection probe 14 attached to one end thereof, The pulse wave detection probe 14 is
2 in one plane with respect to one end of the gripping device 1
Swing center axis C, which is located inside the center 2 and is perpendicular to the one plane.
A swing connection device 16 that swingably connects the gripping device 12 and the pulse wave detection probe 14 to each other so as to be able to swing around.

The gripping device 12 has a relatively rigid first curved member made of a synthetic resin or metal plate.
An arm 20, one end 22 having relatively high rigidity and one end rotatably connected to the first arm 20, and an elastically deformable leaf spring material that extends from the one end 22 and curves. And a second arm 26 comprising the other end 24. The other end of the first arm 20 and the second
The first arm 2 is connected to one end 22 of the arm 26 by a pin 28 so as to be rotatable around the pin 28.
0 and the first arm 2 by the coil spring 30 stretched between the other end of the second arm 26 and the one end 22 of the second arm 26.
The zero and second arms 26 are urged in a direction approaching each other, in a direction in which they are closed, or in a diameter decreasing direction of a circle formed by the mutually curved shapes of the first arm 20 and the second arm 26.

One end of the first arm 20, that is, a branch portion, is branched in a forked shape, and the pulse wave detection probe 14 is swingably connected between the two forked ends. At the forked end of the first arm 20,
A partial inner peripheral surface 34 centered on the swing center axis C is formed, and a stepped surface of a convex portion 36 protruding from the front surface and the back surface of the pulse wave detection probe 14, respectively. A pair of partial outer peripheral surfaces 38 that are in sliding contact with the peripheral surface 34 are formed, and the pulse wave detection probe 14 is connected to one end of the first arm 20 so as to be able to swing around a swing center axis C. Have been. Therefore, the forked end of the first arm 20 on which the partial inner peripheral surface 34 is formed and the convex portion 36 on which the partial outer peripheral surface 38 is formed.
Constitute the swing connection device 16. A groove 40 having a partial outer peripheral surface 38 as a bottom surface is formed on the convex portion 36, and an arc-shaped groove 42 is formed on an inner wall surface of the groove 40. Since the arc-shaped protrusion 44 formed along the partial inner peripheral surface 34 in the portion is fitted in the arc-shaped groove 42,
The drop of the pulse wave detection probe 14 from the first arm 20 is prevented. The partial outer peripheral surface 38, the arc-shaped groove 42, and the arc-shaped projection 44 are circular arcs centered on the swing center axis C, similarly to the partial inner peripheral surface 34.

As shown in detail in FIG. 2, the pulse wave detection probe 14 has a main body 50 having a U-shaped cross section and
6 and a pair of side walls 52 fixed to the front and back of the main body 50
And a housing 56 having a receiving hole 54 formed at one end (the upper end in FIG. 2) on the inner peripheral side. A plurality of (three in this embodiment) pressing direction moving members 58 arranged in parallel and a lateral moving member 60 interposed between the pressing direction moving members 58 are housed in the housing holes 54. As a result, it is held by the housing 56.
The swing center axis C is located on the center line of the three pressing direction moving members 58 so as to be located substantially at the center of the carotid artery when worn, and near the center of the pressing surface 64. Is located approximately.

The pressing direction moving member 58 includes a pressing surface 64 provided with a pressure detecting element 62 pressed toward the carotid artery and a pair of side surfaces 66 whose mutual distance decreases as the distance from the pressing surface 64 increases. It is accommodated in the accommodation hole 54 in a state where the end on the pressing surface 64 side is exposed. The pulse wave signal detected by the pressure detecting element 62 is supplied to a measurement circuit (not shown) via a lead wire 68.

The main body 50 of the housing 56 is formed with a pair of inclined surfaces 70 which are opposed to the side surfaces 66 of the plurality of pressing direction moving members 58 arranged at both ends and are in sliding contact therewith. I have. Further, the lateral moving member 60 inserted between the plurality of pressing direction moving members 58 is formed with a pair of side surfaces 72 whose mutual distance increases toward the inside of the accommodation hole 54, The side surfaces 72 are in sliding contact with the pair of side surfaces 66 of the pressing direction moving member 58.

A plurality of pressing direction moving members 58 in the receiving hole 54 and a lateral moving member 60 interposed therebetween.
A linear guide hole 74 is formed in the pair of side walls 52 to guide the lateral moving member 60 in the lateral direction orthogonal to the pressing direction. Also, the lateral moving member 60
Is provided with a small-diameter roller 76 which engages with and is guided by the guide hole 74. Thus, the lateral moving member 60 cannot move in the pressing direction and can move in the lateral direction perpendicular thereto. In this embodiment, the small-diameter roller 76 functions as an engagement projection.

According to the carotid artery wave detecting apparatus 10 configured as described above, the carotid artery wave detecting device 10 is provided between the plurality of parallel pressing direction moving members 58 so as to be movable in the horizontal direction perpendicular to the pressing direction. Since the lateral moving member 60 is inserted and the pair of side surfaces 72 of the lateral moving member 60 are slid on the side surface 66 of the pressing direction moving member 58, the carotid artery wave detection device 1
When the pulse wave detection probe 14 is pressed against the cervical surface by attaching 0 to the cervix, the plurality of pressing direction moving members 58 are moved in the pressing direction so that the pressure on the pressing surface 64 becomes equal. It is determined. As a result, the carotid artery is pressed by the pressing surfaces of the plurality of pressing direction moving members 58 arranged in a direction intersecting with the carotid artery, so that the unevenness of the surface of the neck is complicated and easily changed. However, the pressing condition of the pressing direction moving member 58 against the carotid artery is preferably stabilized. Accordingly, the carotid artery wave can be stably detected by the pressure detecting element 62 provided on the pressing surface of the pressing direction moving member 58.

Further, according to the present embodiment, the housing 56 includes a plurality of pressing direction moving members 58 and a pair of side walls 5 sandwiching the lateral moving member 60 interposed therebetween.
2 and a linear guide hole 74 formed in the side wall 52 for guiding the lateral moving member 60 in the lateral direction perpendicular to the pressing direction. Are small-diameter rollers 76 that engage with the guide holes 74.
Therefore, there is an advantage that the carotid artery wave detection device 10 is configured to be relatively small.

According to the present embodiment, the carotid artery wave detecting device 10 is curved as a whole in one plane in order to grasp the neck of a living body, and is urged in the diameter reducing direction by an elastic restoring force. A gripping device 12 having the housing mounted on one end thereof, and a housing 56 pivoting with respect to one end of the gripping device 12 within the above-described plane and inside the gripping device 12 and perpendicular to the one plane. Since the swing coupling device 16 that couples the housing 56 and one end of the gripping device 12 so as to be able to swing around the central axis C is provided, the housing 56 and one end of the gripping device 12 are Because it is swingably connected by the dynamic connecting device 16,
Even if the uneven shape of the neck surface is complicated and easily changed, the pressing condition of the pressing direction moving member against the carotid artery is further stabilized. In addition, the housing 56 and one end of the gripping device 12 are located inside the gripping device 12 within a curved plane of the gripping device 12 and capable of swinging about a swing center axis C perpendicular to the plane. Are swingably connected to each other, so that they can easily follow a change in the uneven shape of the surface of the neck portion, and there is an advantage that the pressing condition is hard to change.

The swing connection device 16 of the present embodiment is formed on the outer wall surface of the side wall 52 of the housing 56, respectively.
A pair of partial outer peripheral surfaces 38 centered on the swing center axis C
And a bifurcated branch formed at one end of the gripping device 12, and a pair of partial inner peripheral surfaces 34 formed at the bifurcation and slidingly contacting the pair of partial outer peripheral surfaces 38. There is an advantage that the swing connection device 16 is simply configured.

Next, another embodiment of the present invention will be described in detail with reference to the drawings. FIG. 3 is a diagram illustrating an external configuration of a carotid artery wave detection device 80 that is pressed against a carotid artery of a living body and detects a pulse wave from the carotid artery, and FIG. 4 is a cross-sectional view taken along line AA of FIG. . Note that the pulse wave detection probe 84 in the present embodiment is
Has a housing 110 and three pressing direction moving members 112 supported so that the pressing forces are equalized in the housing 110. The pulse wave detection probe 14 and the Since it has almost the same configuration as the support structure, detailed description is omitted.

In FIG. 3, the carotid artery wave detecting device 80
A gripping device 82 which is curved in one plane as a whole to grip the neck of a living body and is urged in a radially-reduced direction by an elastic return force, a pulse wave detection probe 84 attached to one end thereof, Pulse wave detection probe 84 is held by gripping device 8
2 in one plane with respect to one end of the gripping device 8.
Swing center axis C, which is located inside the center 2 and is perpendicular to the one plane.
A swing connection device 86 that swingably connects the gripping device 82 and the pulse wave detection probe 84 to each other so as to be able to swing around is provided.

The gripping device 82 has a relatively rigid first arm 88 made of a synthetic resin, and a relatively synthetic resin relatively connected at one end to the first arm 88. And a second arm 90 that is highly rigid and curved. The first arm 88 includes a front member 92 and a back member 94 as shown in FIG.
The other end of the arm 88 and one end of the second arm 90 are fitted with a cylindrical portion 98 provided on the other end of the back member 94 in an annular portion 96 provided on one end of the second arm 90. By being inserted, they are connected to each other so as to be rotatable around the columnar portion 98.

The first arm 88 is provided by a coil spring 100 provided between the annular portion 96 and the columnar portion 98.
And the second arm 90 move toward each other, in the direction in which they close, or the first arm 88 and the second arm 9.
0 are urged in the diameter reducing direction of the circle formed by the mutually curved shapes. The annular portion 96 has a gear-like portion in the circumferential direction of its outer peripheral portion, and is meshed with the rotation shaft of the oil damper 102 screwed to the front member 92.

As shown in FIG. 4, an arc-shaped projection 106 having a T-shaped cross section and centered on a swing center axis C provided at a lower portion of the pulse wave detection probe 84 is provided at one end of the first arm 88. Is movably fitted in a circumferential direction in an arc-shaped groove 108 about the swing center axis C,
The pulse wave detection probe 84 is prevented from falling off from the first arm 88 and the pulse wave detection probe 84 is connected to the first arm 8.
8 is connected to one end portion so as to be swingable about a swing center axis C. Therefore, the lower part of the pulse wave detection probe 84 provided with the arc-shaped protrusion 106 and the arc-shaped groove 1
One end of the first arm 88 provided with 08 constitutes the swing connection device 86.

As described above, according to the present embodiment, the carotid artery wave detecting device 80 is curved as a whole in one plane in order to grip the neck of a living body, and is urged in the diameter reducing direction by an elastic restoring force. The housing 110 shown in FIG. 3 is attached to one end of the holding device 82, and the housing 110 is positioned inside the holding device 82 in the above-mentioned one plane with respect to one end of the holding device 82, Is provided with a swing connection device 86 that connects the housing 110 and one end of the holding device 82 so as to be able to swing around a swing center axis C perpendicular to the housing 110 and the housing 110 and the holding device 82.
3 is swingably connected to the one end of the carotid artery by the rocking connection device 86. Therefore, even if the uneven shape of the surface of the neck is complicated and easy to change, the pressing of FIG. The pressing condition of the direction moving member 112 is further stabilized. In addition, the housing 110 and one end of the gripping device 82 are located inside the gripping device 82 within a curved plane of the gripping device 82 and can swing about a swing center axis C perpendicular to the plane. Are swingably connected to each other, so that they can easily follow a change in the uneven shape of the surface of the neck portion, and there is an advantage that the pressing condition is hard to change.

Although the embodiment of the present invention has been described with reference to the drawings, the present invention can be applied to other embodiments.

For example, the swing connection device 1 of the above-described embodiment.
6 is such that the gripping device 12 which is curved in one plane is located inside the gripping device 12 in the one plane and can swing around a swing center axis C perpendicular to the one plane,
Although the housing 56 is connected to one end of the gripping device 12, the swing center axis C is not necessarily located inside the gripping device 12.

Further, the swing connection device 16 of the above-described embodiment is used.
May be a connecting device having a universal joint type degree of freedom.

Further, the gripping device 12 of the above-described embodiment may be integrally formed of a curved elastic body made of a synthetic resin or a spring material.

In addition, the present invention can be variously modified without departing from the gist thereof.

[Brief description of the drawings]

FIG. 1 is a front view illustrating the configuration of a carotid artery wave detection device according to an embodiment of the present invention.

FIG. 2 is an enlarged view, partially cut away, for explaining the configuration of the pulse wave detection probe of the embodiment of FIG.

FIG. 3 is a front view illustrating a configuration of a carotid artery wave detection device according to another embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

[Description of sign]

 10, 80: carotid artery wave detection device 12, 82: grasping device 14, 84: pulse wave detection probe 16, 86: swing connection device 34: partial inner peripheral surface 38: partial outer peripheral surface 56, 110: housing 58, 112 : Pressing direction moving member 60: lateral direction moving member 62: pressure detecting element 64: pressing surface 66: side surface 70: inclined surface 72: side surface 74: guide hole 76: small diameter roller (engagement protrusion)

Claims (4)

[Claims] 1. A carotid artery wave detecting device which is pressed against a carotid artery of a living body and detects a pulse wave from the carotid artery, wherein a pressing surface provided with a pressure detecting element pressed against the carotid artery is provided. A plurality of pressing direction moving members arranged side by side with a pair of side surfaces whose distance from each other becomes smaller as the distance from the surface increases, a receiving hole having one end opened, and a side wall surface of the receiving hole formed from inside. A pair of opposed inclined surfaces whose distance increases toward the outside; a state in which the side surfaces of the plurality of pressing direction moving members located at both ends are in sliding contact with the pair of inclined surfaces. A housing for holding the plurality of pressing direction moving members, and a pair of side surfaces whose mutual distance increases toward the inside of the accommodation hole, provided movably in a direction orthogonal to the pressing direction, The pair of side faces is pressed A carotid artery wave detection device, comprising: a lateral moving member interposed between the pressing direction moving members while being in sliding contact with a side surface of the direction moving member. 2. The housing, comprising: a plurality of pressing direction moving members; a pair of side walls sandwiching the lateral moving member interposed therebetween; and a direction perpendicular to the pressing direction. And a linear guide hole formed in the side wall for guiding the guide member in the lateral direction, and the lateral moving member has an engaging projection that engages with the guide hole. 1 carotid artery wave detection device. 3. The carotid artery wave detecting device is curved as a whole in one plane to grip the neck of the living body, and is urged in a radially decreasing direction by an elastic restoring force. A mounted gripping device, wherein the housing is rotatable with respect to one end of the gripping device about a rocking center axis located inside the gripping device in the one plane and perpendicular to the one plane. 3. The carotid artery wave detection device according to claim 1, further comprising a swing connection device that connects the housing and one end of the holding device. 4. The swing connection device is formed on an outer wall surface of a side wall of the housing, and is formed on a pair of partial outer peripheral surfaces around the swing center axis and one end of the gripping device. 4. The carotid artery wave detection device according to claim 3, comprising: a bifurcated branch portion; and a pair of partial inner peripheral surfaces formed at the bifurcated portion and slidingly contacting the pair of partial outer peripheral surfaces.