JP2018079178A - Catheter fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify an operation of fixing a catheter.SOLUTION: A retainer 1 includes: a stationary piece 10 to be fixed to a body surface 67 of a patient; a movable piece 20; a hinge mechanism 30 rotationally connecting the movable piece to the stationary piece; and locking mechanisms 41 and 44 for retaining the movable piece at a closed position where the movable piece is overlapped with the stationary piece. A catheter 60 is retained between the stationary piece and the movable piece in the closed position. The movable piece is retained at an open position spaced from the stationary piece, and a half-open position between the open position and the closed position. The movable piece includes a locking projection 22 projecting from a surface facing the stationary piece, when movable piece is in the closed position. When the movable piece is in the half-open position, the locking projection locks the catheter so as to prevent the catheter from being pulled out from a place between the stationary piece and the movable piece.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a catheter fixture used to fix a medical catheter to a patient's body.

  In percutaneous vasodilation or the like, a catheter is inserted into a blood vessel. Due to the lubricity of the catheter surface, the catheter may move when the guide wire is operated or a contrast medium is injected while the catheter is inserted. In order to prevent this, a fixture for securing the catheter to the patient's body is desired.

  Patent Document 1 describes a fixture made of a flexible material and capable of opening and closing and a cover made of a hard material and capable of opening and closing via a hinge. The catheter is placed in the semicircular groove of the holding part with the holding part and the cover part in the open state. Next, when the cover part is closed, the cover part presses the holding part to deform the holding part into a cylindrical shape, and the catheter is fixed in the holding part. Thereafter, the fixture holding the catheter is secured to the patient's skin with sutures.

Japanese Patent Laid-Open No. 2005-31615

  In order to fix the catheter to the conventional fixture described above, it is necessary to close the cover part in a state where the catheter is fitted in the groove of the holding part. Since the groove width is approximately the same as the outer diameter of the catheter, the catheter must be accurately positioned in the groove. If the catheter is out of the groove of the holding part, the cover part cannot be closed. Therefore, there is a problem that the operation for fixing the catheter is complicated.

  An object of the present invention is to simplify the operation of fixing a catheter.

  The catheter fixture of the present invention includes a fixed piece fixed to a patient's body surface, a movable piece, a hinge mechanism that rotatably connects the movable piece to the fixed piece, and the movable piece is fixed. A locking mechanism for maintaining the movable piece in a closed position superimposed on the piece. The catheter fixture is configured to hold a catheter between the fixed piece and the movable piece in the closed position. The catheter fixture is configured such that the movable piece is held in an open position where the movable piece is separated from the fixed piece, and a half-open position between the open position and the closed position. Yes. The movable piece includes a locking projection protruding from a surface facing the fixed piece when in the closed position. The locking protrusion locks the catheter so that the catheter does not come out between the fixed piece and the movable piece when the movable piece is in the half-open position.

  According to the present invention, the catheter is placed on the fixed piece while the movable piece is in the open position, and the movable piece is moved to the half-open position to temporarily fix the catheter to the fixture. Subsequently, if the movable piece is moved to the closed position, the catheter can be fixed to the fixture. When temporarily fixing the catheter to the fixture, it is not necessary to accurately align the catheter. After temporarily fixing the catheter, the movable piece need only be moved to the closed position. Thus, according to the present invention, the catheter can be fixed by an extremely simple operation.

FIG. 1A is a perspective view seen from above of a fixture according to an embodiment of the present invention with a movable piece in an open position. FIG. 1B is a perspective view of the fixture according to the embodiment of the present invention when viewed from below, with the movable piece in the open position. FIG. 1C is a cross-sectional view of the fixture according to one embodiment of the present invention with the movable piece in the open position. FIG. 2A is a perspective view of the fixture according to the embodiment of the present invention when viewed from above, with the movable piece in the half-open position. FIG. 2B is a cross-sectional view of the fixture according to one embodiment of the present invention with the movable piece in the half-open position. FIG. 3A is a perspective view of the fixture according to the embodiment of the present invention when viewed from above, with the movable piece in the closed position. FIG. 3B is a cross-sectional view of the fixture according to one embodiment of the present invention with the movable piece in the closed position. FIG. 4 is a perspective view showing a state in which the fixture according to the embodiment of the present invention is fixed in the vicinity of the catheter puncture position. FIG. 5 is a perspective view showing a state where the catheter is temporarily fixed by the fixture according to the embodiment of the present invention. FIG. 6A is a perspective view showing a state in which the catheter is fixed by the fixture according to the embodiment of the present invention. FIG. 6B is a cross-sectional view showing a state in which the catheter is fixed by the fixture according to the embodiment of the present invention. FIG. 7 is a perspective view seen from above of a fixture according to another embodiment of the present invention in which the movable piece is in the open position. FIG. 8 is a perspective view from above of a fixture according to yet another embodiment of the present invention, with the movable piece in the open position.

  In the above-described catheter fixture of the present invention, the movable piece may further include a regulation protrusion that protrudes from a surface facing the fixed piece when in the closed position. In this case, the restricting protrusion may lock the catheter so that the catheter does not approach the hinge mechanism when the movable piece is in the half-open position. According to such a configuration, when the movable piece is in the half-open position, the possibility that the movable piece cannot be moved to the closed position due to the catheter being sandwiched between the fixed piece and the movable piece is reduced. be able to. This is advantageous for the simple and quick operation of fixing the catheter.

  The locking mechanism may be configured to be automatically activated when the movable piece moves from the half-open position to the closed position. Such a configuration is advantageous for easily and quickly performing the operation of fixing the catheter.

  The lock mechanism may have an engagement structure provided on each of the fixed piece and the movable piece so as to engage with each other when the movable piece is in the closed position. The engagement structure provided on one of the fixed piece and the movable piece may be elastically displaceable. The one of the fixed piece and the movable piece may include a release piece that elastically displaces the engagement structure. According to this configuration, the lock state of the lock mechanism can be released by operating the release piece. This is advantageous for simplifying the operation for releasing the lock state.

  The hinge mechanism may bias the movable piece so that the movable piece moves toward the open position or the half-open position when the movable piece is in a position other than the open position and the half-open position. . According to this configuration, the movable piece can be moved easily and quickly between the open position and the half-open position. Further, if the lock mechanism is unlocked while the movable piece is in the closed position, the movable piece can be immediately moved to the half-open position. Thus, the above configuration is advantageous for further improving the operability of the fixture.

  The fixed piece may include a holding protrusion protruding toward the movable piece in the closed position. When the movable piece is in the closed position, a catheter may be held between the holding protrusion and the movable piece. Such a configuration allows the catheter to be fixed at a position relatively distant from the patient's body surface, so that the fixing member is separated from the body surface due to the elastic restoring force of the catheter, or the catheter is kinked. It is advantageous to prevent

  The movable piece may extend along the longitudinal direction of the catheter beyond the holding portion where the fixed piece holds the catheter when the movable piece is in the closed position. Such a configuration makes it possible to place the movable piece in the vicinity of or above the puncture position of the catheter, which is advantageous in preventing the catheter from greatly rising from the body surface.

  Below, this invention is demonstrated in detail, showing suitable embodiment. However, it goes without saying that the present invention is not limited to the following embodiments. Each drawing referred to in the following description shows simplified main members constituting an embodiment of the present invention for convenience of description. Therefore, the present invention can include any member not shown in the following drawings. Further, within the scope of the present invention, each member shown in the following drawings can be changed or omitted.

  FIG. 1A is a perspective view of a catheter fixture (hereinafter simply referred to as “fixer”) 1 according to an embodiment of the present invention as seen from above, and FIG. 1B is a perspective view of the fixture 1 as seen from below. The fixture 1 includes a fixed piece 10 and a movable piece 20. The fixed piece 10 and the movable piece 20 are flat plates having substantially the same substantially rectangular plan view shape. One side (long side in this example) of the fixed piece 10 and one side (long side in this example) of the movable piece 20 are connected via a hinge mechanism 30 (details will be described later). The movable piece 20 can rotate with respect to the fixed piece 10 using the hinge mechanism 30 as a rotation axis (see FIGS. 2A, 2B, 3A, and 3B described later). For convenience of the following explanation, an XYZ orthogonal coordinate system as shown is set. The Z axis is perpendicular to the fixed piece 20, and the side to which the arrow of the Z axis is directed is referred to as “upper” side, and the opposite side is referred to as “lower” side. The X axis is parallel to the rotation axis of the hinge mechanism 30. A direction parallel to the XY plane is referred to as a “horizontal direction”.

  As shown in FIG. 1A, the two guide ribs 11 a and 11 b and the two holding protrusions 12 protrude upward from the upper surface 10 a of the fixed piece 10. The guide ribs 11a and 11b are rib-shaped protrusions extending in parallel to the X axis at a substantially constant height. The guide ribs 11a and 11b are disposed along the outer peripheral edge (particularly, the long side) of the fixed piece 10 and are separated in the Y-axis direction. The holding protrusion 12 is a rib-shaped protrusion having a substantially constant height, and extends parallel to the Y axis so as to connect the guide rib 11a and the guide rib 11b. The length of the holding projection 12 along the Y axis is sufficiently longer than the outer diameter of the catheter 60 (see FIGS. 4 to 6B described later) fixed by the fixture 1. The two holding protrusions 12 are separated from each other in the X-axis direction. The holding protrusion 12 is provided at a position slightly retracted inward from the outer peripheral edge (particularly the short side) of the fixed piece 10. The guide rib 11a and the guide rib 11b have the same height. The two holding projections 12 have the same height, and the height is slightly lower than the guide ribs 11a and 11b.

  A claw (engagement structure) 41 protrudes along the Y-axis direction from the outer surface of the guide rib 11a (the surface opposite to the holding projection 12). The claw 41 has an inclined surface 41a that is inclined so as to be separated from the guide rib 11a as it goes downward, on the upper side of the top portion (the portion that protrudes most in the Y-axis direction from the guide rib 11a).

  A hinge mechanism 30 is provided on the outer surface of the guide rib 11b (the surface opposite to the holding projection 12).

  As shown in FIG. 1B, the lower surface 10b of the fixed piece 10 is a plane parallel to the XY plane.

  In FIG. 1A, two locking projections 21 and 2 are formed from a flat inner surface of the movable piece 20 (a surface facing the fixed piece 10 when the movable piece 20 is in a closed position (see FIGS. 3A and 3B described later)) 20a. Two restricting protrusions 22 protrude. The locking protrusions 21 and the restricting protrusions 22 are discretely arranged at positions slightly retracted inward from the outer peripheral edge of the movable piece 20 and corresponding to the four corners of the rectangle. The restricting protrusion 22 is located closer to the hinge mechanism 30 than the locking protrusion 21.

  A convex piece 25 protruding toward the side opposite to the hinge mechanism 30 is provided at the center of the long side opposite to the long side where the hinge mechanism 30 of the movable piece 20 is provided. The projecting piece 25 is provided with a slot-like through hole 26 extending in parallel with the Y axis. A lock plate 43, which is a substantially rectangular thin plate, passes through the through hole 26 so as to be substantially perpendicular to the movable piece 20. A claw (engagement structure) 44 is provided at the tip of a portion of the lock plate 43 that protrudes on the same side as the locking projection 21 and the regulation projection 22 with respect to the movable piece 20. The claw 44 protrudes from the lock plate 43 toward the hinge mechanism 30 side. The claw 44 is inclined so as to be closer to the hinge mechanism 30 side toward the movable piece 20 on the opposite side to the movable piece 20 than the top portion (the portion most protruding from the lock plate 43 to the hinge mechanism 30 side). A surface 44a is provided.

  As shown in FIG. 1B, a portion of the lock plate 43 that protrudes to the side opposite to the locking projection 21 and the regulation projection 22 with respect to the movable piece 20 is a release piece 45.

  FIG. 1C is a cross-sectional view of the fixture 1 passing through the claw 44, the hinge mechanism 30, and the lock plate 43 and along a plane parallel to the YZ plane. The surface of the lock plate 43 opposite to the hinge mechanism 30 is connected to the inner peripheral surface of the through hole 26 via a hinge 47. The hinge 47 is thin and can be flexibly deformed. For this reason, the lock plate 43 can be rotated like a seesaw so that the claw 44 and the release piece 45 move in opposite directions around the hinge 47. For example, when the release piece 45 is displaced so as to approach the hinge mechanism 30, the claw 44 is displaced away from the hinge mechanism 30.

  Returning to FIG. 1A, the hinge mechanism 30 is a so-called “three-point hinge” composed of two butterfly plates 31 and 32 spaced apart in the Y-axis direction and an elastic band 33 therebetween. The butterfly plates 31 and 32 are thin, can be easily bent and deformed, and connect the fixed piece 10 and the movable piece 20 so as to be rotatable. The elastic band 33 has a substantially L shape (see FIG. 1C), one end of which is connected to the fixed piece 10 via a thin part that can be easily bent and the other end is connected to the thin part that is easy to bend and deform. To the movable piece 20. Since the butterfly plates 31 and 32 and the elastic band 33 are connected to the fixed piece 10 and the movable piece 20 at different positions, the movable piece 20 rotates with respect to the fixed piece 10 via the hinge mechanism 30. The bending angle of the portion having the substantially L shape of the elastic band 33 changes elastically. Similar to a general three-point hinge, the hinge mechanism 30 stably holds the movable piece 20 at two rotational positions with respect to the fixed piece 10 by using the elastic restoring force of the elastic band 33. The first rotation position is an “open position” shown in FIGS. 1A to 1C. When the movable piece 20 is in the open position, the fixed piece 10 and the movable piece 20 are substantially parallel to the XY plane. The second rotation position is a “half-open position” shown in FIGS. 2A and 2B. If an external force is applied to the movable piece 20 when the movable piece 20 is in the open position or the half-open position, the elastic band 33 is elastically deformed, and the movable piece 20 can be displaced to other positions. When the movable piece 20 is in a position other than the open position and the half-open position, the hinge mechanism 30 biases the movable piece 20 so that the movable piece 20 moves toward either the open position or the half-open position.

  The half-open position will be described. FIG. 2A is a perspective view seen from above the fixture 1 with the movable piece 20 in the half-open position. FIG. 2B is a cross-sectional view of the fixture 1. The cross section of FIG. 2B corresponds to the cross section of FIG. 1C. As shown in FIG. 2A, when the movable piece 20 is in the half-open position, the movable piece 20 is opposed to the fixed piece 10, and the lock plate 43 side is high and the hinge mechanism 30 side is low. Is inclined with respect to the fixed piece 10. As shown in FIG. 2B, the locking protrusion 21 is positioned on the guide rib 11 b side with respect to the guide rib 11 a, and the tip of the locking protrusion 21 is substantially at the same height as the upper end of the holding protrusion 12. The restricting protrusion 22 is inserted between the guide rib 11a and the guide rib 11b. As a result, when viewed along the direction parallel to the X axis, the holding projection 12, the movable piece 20, the locking projection 21, and the regulating projection 22 are substantially disposed between the fixed piece 10 and the movable piece 20. An enclosed substantially wedge-shaped (or substantially triangular) space 51 is formed. The Y-axis direction dimension and the Z-axis direction dimension of the space 51 are larger than the outer diameter of the catheter 60 (see FIGS. 4 to 6B described later) to which the fixture 1 is fixed. In the X-axis direction, the locking protrusion 21 and the restricting protrusion 22 are located outside the two holding protrusions 12.

  The movable piece 20 is lowered by pushing the outer surface 20b of the movable piece 20 in the half-open position (the surface facing away from the fixed piece 10) downward, and the “closed position” shown in FIGS. 3A and 3B. It can be moved to the closed position.

  FIG. 3A is a perspective view seen from above the fixture 1 with the movable piece 20 in the closed position. FIG. 3B is a cross-sectional view of the fixture 1. The cross section of FIG. 3B corresponds to the cross section of FIG. 1C and the cross section of FIG. 2B.

  As shown in FIG. 3B, when the movable piece 20 is in the closed position, the movable piece 20 is parallel to the fixed piece 10 and is superimposed on the fixed piece 10. The inner surface 20a of the movable piece 20 contacts the guide ribs 11a and 11b provided on the fixed piece 10 in the vertical direction. The locking protrusion 21 and the restricting protrusion 22 are inserted between the guide rib 11a and the guide rib 11b that are separated in the Y-axis direction. As a result, when viewed along the direction parallel to the X-axis, the fixed projection 10 and the movable piece 20 are surrounded by the holding projection 12, the movable piece 20, the locking projection 21, and the regulation projection 22. A space 52 is formed. That is, the space 51 (see FIG. 2B) when the movable piece 20 is in the half-open position changes to the space 52 when the movable piece 20 moves to the closed position.

  The claw 44 of the movable piece 20 is engaged with the claw 41 of the fixed piece 10. The engagement between the claw 41 and the claw 44 holds the movable piece 20 in the closed position against the biasing force of the hinge mechanism 30 that attempts to return the movable piece 20 to the half-open position (see FIGS. 2A and 2B). To do. Thus, the claws 41 and 44 constitute a “lock mechanism” for maintaining the movable piece 20 in the closed position. 2B and 3B, when the movable piece 20 in the half-open position (FIG. 2B) is lowered, the inclined surface 44a of the claw 44 collides with the inclined surface 41a of the claw 41, and then the hinge 47 Then, the lock plate 43 is rotated so that the claw 44 is separated from the hinge mechanism 30 and then the hinge 47 is elastically restored to engage the claw 41 and the claw 44 as shown in FIG. 3B. Thus, the lock mechanism is activated at the same time that the movable piece 20 moves to the closed position by a simple operation of pushing the movable piece 20 in the half-open position (see FIGS. 2A and 2B) downward with a finger. (In other words, the lock state is established).

  The material of the fixture 1 is not limited, but is preferably relatively soft in order to ensure the deformability and durability of the hinge mechanism 30 and the hinge 47. Specifically, resin materials such as polypropylene (PP) and polyethylene (PE) can be used. The fixture 1 can be integrally manufactured as a whole by using the above-mentioned material, for example, by an injection molding method or the like.

  A method of using the fixture 1 of the present embodiment configured as described above will be described by taking as an example a case where a catheter used in percutaneous vasodilation is fixed to a patient.

  First, a catheter is inserted into the patient's blood vessel. The method for inserting the catheter is arbitrary. For example, the catheter may be directly punctured into the blood vessel. In this case, the catheter is derived from the patient at an angle close to perpendicular to the body surface. There are no restrictions on the catheters that can be used. In one example, a catheter having an outer diameter of 0.85 mm and an inner diameter of 0.50 mm may be used. The catheter has such a bending rigidity that it can be freely bent and deformed.

  Next, the fixture 1 having the movable piece 20 in the open position (FIGS. 1A to 1C) is prepared. As shown in FIG. 4, the fixture 1 is fixed near the puncture position 65 of the catheter 60 on the patient's body surface. Although the fixing method is arbitrary, for example, the lower surface 10b (see FIG. 1B) of the fixing piece 10 can be affixed to the body surface using a double-sided adhesive tape. The catheter 60 led out from the puncture position 65 is curved so that the bending rigidity and its own weight are balanced and rises upward. The fixture 1 is disposed in the vicinity of the puncture position 65 and below the catheter 60. The fixture 1 is arranged such that the puncture position 65 is located between the extension lines of the guide ribs 11a and 11b when viewed from above.

  Next, as shown in FIG. 5, the movable piece 20 is rotated toward the half-open position (see FIGS. 2A and 2B) so that the movable piece 20 covers the catheter 60. For example, in FIG. 4, the movable piece 20 is lifted while pressing the catheter 60 against the body surface so that the catheter 60 is positioned on the fixture 10 (particularly, the holding projection 12). The movable piece 20 rotates around the hinge mechanism 30. When the movable piece 20 rotates more than a certain angle, the movable piece 20 automatically moves toward the half-open position by the biasing force of the hinge mechanism 30.

  The catheter 60 swelled upward in FIG. 4 is pressed downward by the movable piece 20 in the half-open position in FIG. The catheter 60 is accommodated in a space 51 (see FIG. 2B) between the fixed piece 10 and the movable piece 20. As described above, the movable piece 20 in the half-open position is inclined so that the lock plate 43 side becomes higher. For this reason, the catheter 60 tends to move toward the lock plate 43 along the inner surface 20a of the movable piece 20. However, since the catheter 60 is locked to the locking protrusion 21, it cannot escape from the space 51. Further, since the catheter 60 is locked to the restricting protrusion 22, it cannot move above the guide rib 11 b or into the hinge mechanism 30. Therefore, when the movable piece 20 is in the half-open position as shown in FIG. 5, the catheter 60 is temporarily fixed to the fixture 1 between the fixed piece 10 and the movable piece 20.

  As described above, the Y axis direction dimension and the Z axis direction dimension of the space 51 are larger than the outer diameter of the catheter 60. For this reason, the catheter 60 is freely movable in the space 51. For example, in the state where the catheter 60 is temporarily fixed to the fixture 1 as shown in FIG. 5, (1) the position and orientation of the catheter 60 in the horizontal plane with respect to the fixture 1 are finely adjusted. (2) The puncture position of the catheter 60 Adjusting the posture of the catheter 60 such as adjusting the upward bulge of the portion between 65 and the fixture 1 (for example, pulling out the catheter 60 from the fixture 1 to reduce the bulge of the catheter 60). it can. Fine adjustment of the position and orientation of the catheter 60 may be necessary when the fixing position of the fixture 1 relative to the body surface is inappropriate. It is desirable to reduce the rise of the catheter 60 from the viewpoint of preventing the operator's hand and various instruments from being caught by the catheter 60.

  The movable piece 20 is held at the half-open position by the biasing force of the hinge mechanism 30. For this reason, the movable piece 20 is in the open position (see FIG. 4) so long as the elastic restoring force of the catheter 60 itself is extended or the catheter 60 is lightly in contact with the movable piece 20 when adjusting the posture of the catheter 60. ) Will not return. Further, the movable piece 20 does not move to the closed position (see FIG. 6A described later) due to its own weight. For this reason, the operator does not need to keep holding the movable piece 20 so that the movable piece 20 does not move when adjusting the posture of the catheter 60. This makes it possible to adjust the posture of the catheter 60 with one hand, which is advantageous for efficient adjustment work. Since the locking projection 21 locks the catheter 60, there is no erroneous operation of pulling out the catheter 60 from between the fixed piece 10 and the movable piece 20 (that is, the space 51) when adjusting the posture of the catheter 60. . This is also advantageous for efficient adjustment work.

  After adjusting the posture of the catheter 60 appropriately, the movable piece 20 is pushed downward. In order not to change the posture of the catheter 60 with the movement of the movable piece 20, for example, while pressing the catheter 60 against the body surface with an arbitrary finger (for example, middle finger) of the right hand, it is movable with the other finger (for example, index finger) of the right hand The outer surface 20b of the piece 20 may be pushed downward.

  As shown in FIG. 6A, the movable piece 20 pushed down moves to the closed position (see FIGS. 3A and 3B). The catheter 60 is accommodated in a space 52 (see FIG. 3B) between the fixed piece 10 and the movable piece 20. The vertical dimension of the space 52 (that is, the distance between the holding projection 12 and the movable piece 20) is the same as or slightly smaller than the outer diameter of the catheter 60. For this reason, the catheter 60 is sandwiched between the fixed piece 10 (particularly, the holding projection 12) and the movable piece 20 in the vertical direction. Since the claw 41 and the claw 44 are engaged, the movable piece 20 is maintained in the closed position unless the engagement is released.

  After the catheter 60 is fixed to the fixture 1 as shown in FIG. 6A, the position and orientation of the catheter 60 and / or the upward bulge of the portion between the puncture position 65 of the catheter 60 and the fixture 1 is corrected. There may be cases where it must be done. In this case, the release piece 45 protruding upward from the movable piece 20 is pushed in the direction of the hinge mechanism 30. As can be understood from FIG. 3B, the lock plate 43 rotates around the hinge 47 and the engagement between the claw 44 and the claw 41 is released. Due to the biasing force of the hinge mechanism 30, the movable piece 20 immediately jumps up and automatically moves to the half-open position (see FIG. 5). With the movable piece 20 in the half-open position, the posture of the catheter 60 is readjusted, and the movable piece 20 is pushed downward again. The movable piece 20 moves again to the closed position (FIG. 6A), and the catheter 60 is fixed to the fixture 1.

  Even if the guide wire (not shown) is operated or the contrast medium is injected into the blood vessel through the catheter 60 with the catheter 60 fixed to the fixture 1 as shown in FIG. Does not move or escape from the blood vessels.

  After completing the necessary treatment, the catheter 60 is released from the fixture 1. That is, in the state of FIG. 6A, the release piece 45 is pushed in the direction of the hinge mechanism 30 to move the movable piece 20 to the half-open position (see FIG. 5). Next, the movable piece 20 is lifted upward. The movable piece 20 rotates around the hinge mechanism 30. When the movable piece 20 rotates more than a certain angle, the movable piece 20 automatically moves toward the open position (see FIG. 4) by the biasing force of the hinge mechanism 30. Thus, the catheter 60 can be separated from the fixture 1.

  As described above, the fixture 1 of the present invention includes the fixed piece 10 and the movable piece 20 that can rotate with respect to the fixed piece 10. With the movable piece 20 in the open position (see FIG. 4), the catheter 60 is placed on the fixed piece 10 and the movable piece 20 is moved to the half-open position (see FIG. 5). Since the catheter 60 only needs to be accommodated in the space 51 (see FIG. 2B), it is not necessary to strictly position the catheter 60 with respect to the fixed piece 10 in a state where the movable piece 20 is in the open position (see FIG. 4). . After the movable piece 20 is moved to the half-open position (see FIG. 5), the locking protrusion 21 (see FIG. 2B) provided on the movable piece 20 causes the catheter 60 to move between the fixed piece 10 and the movable piece 20 (see FIG. 5). That is, the catheter 60 is locked so as not to escape from the space 51). For this reason, the catheter 60 can be fixed to the fixture 1 by simply pushing down the movable piece 20 in the half-open position (see FIG. 6A). As described above, the fixture 1 of the present invention is very easy to operate for fixing the catheter 60. A series of operations from the state in which the movable piece 20 is in the open position (see FIG. 4) to the state in which the catheter 60 is fixed (see FIG. 6A) can be performed with one hand.

  Further, adjustment of the posture of the catheter 60 such as the position and orientation of the catheter 60 and the upward bulging of the portion between the puncture position 65 of the catheter 60 and the fixture 1 is performed by moving the movable piece 20 to the half-open position (see FIG. 5). ). In order to adjust the posture of the catheter 60, it is not necessary to correct the position of the fixture 1 itself.

  The restricting protrusion 22 locks the catheter 60 so that the catheter 60 does not approach the hinge mechanism 30 when the movable piece 20 is in the half-open position (see FIG. 5). Unlike the present embodiment, when the restricting protrusion 22 is not provided, the catheter 60 can move above the guide rib 11b or into the hinge mechanism 30 when the movable piece 20 is in the half-open position (see FIG. 5). There is sex. Even if the movable piece 20 is pushed down with the catheter 60 in such a position, the catheter 60 is caught between the guide rib 11b and the hinge mechanism 30, and therefore the movable piece 20 is moved to the closed position (see FIG. 6A). I can't. Since the restricting protrusion 22 of the present embodiment reduces the occurrence of a situation in which the movable piece 20 cannot be moved from the half-open position to the closed position, it is advantageous for performing the operation of fixing the catheter 60 easily and quickly. .

  The lock mechanism 30 is configured to be automatically activated when the movable piece 20 moves from the half-open position to the closed position. Unlike the present embodiment, when an operation for enabling the lock mechanism 30 is required in addition to the operation for moving the movable piece 20 to the closed position, the operation for fixing the catheter 60 to the fixture 1 becomes complicated. In addition, there is a possibility of an erroneous operation of forgetting the operation for enabling the lock mechanism 30. According to the present embodiment, such a problem does not occur. In this embodiment, the catheter 60 can be fixed to the fixture 1 by moving the movable piece 20 to the closed position by a very simple operation of pressing the movable piece 20 in the half-open position with one finger. . The operation for fixing the catheter 60 to the fixture 1 can be performed easily and quickly. Further, the lock state of the lock mechanism 30 can be released simply by pressing the release piece 45. Therefore, the operation for releasing the locked state can be performed easily and quickly.

  When the movable piece 20 is in a position other than the open position (see FIGS. 1A to 1C and FIG. 4) and the half-open position (see FIGS. 2A, 2B and 5), the hinge mechanism 30 The movable piece 20 is urged so as to move toward the half-open position. For this reason, the hinge mechanism 30 stably holds the movable piece 20 in the open position or the half-open position. The movable piece 20 does not move from these positions due to its own weight. As described above, when the movable piece 20 is moved from the open position to the half-open position, and conversely, when the movable piece 20 is moved from the half-open position to the open position, the operator moves the movable piece 20 to the middle of the moving stroke. If moved, the hinge mechanism 30 thereafter moves the movable piece 20 to the target position instantly. The operator does not need to accurately position the movable piece 20 at the open position and the half-open position. This is advantageous for light and quick movement of the movable piece 20. If the operator releases the lock mechanism (claws 41 and 44) while the movable piece 20 is in the closed position (see FIG. 6A), the hinge mechanism 30 instantaneously moves the movable piece 20 to the half-open position. Let Only by the operator performing an extremely simple operation of pressing the release piece 45 with one finger, the lock state of the lock mechanism is released, and the movable piece 20 moves from the closed position to the half-open position. When the locked state is released, the movable piece 20 does not move to the open position but stops at the half-open position, so that the catheter 60 remains between the fixed piece 10 and the movable piece 20 (that is, the space 51) ( (See FIG. 2B). If necessary, the catheter 60 can be fixed to the fixture 1 again after adjusting the posture of the catheter 60. The movable piece 20 can be repeatedly moved any number of times between the half-open position and the closed position. The movable piece 20 can be moved from the half-open position to the closed position only by pressing the movable piece 20 down, and the movable piece 20 can be moved from the closed position to the half-open position only by pushing the release piece 45. . In this way, the movable piece 20 can be moved between the half-open position and the closed position with only one finger. This is advantageous when the posture adjustment of the catheter 60 is repeatedly performed. Further, in order to take out the catheter 60 fixed to the fixture 1 from the fixture 1, the release piece 45 is pushed to move the movable piece 20 from the closed position to the half-open position, and then the movable piece 20 is flipped upward. Just do it. Therefore, the operation of taking out the catheter 60 from the fixture 1 can be performed quickly with only one finger.

  FIG. 6B is a cross-sectional view of the fixture 1 shown in FIG. 6A on a plane parallel to the longitudinal direction of the catheter 60. The holding projection 12 and the inner surface 20a of the movable piece 20 sandwich the catheter 60. The upper end of the holding projection 12 constitutes a holding unit that holds the catheter 60. Since the holding protrusion 12 protrudes upward from the upper surface 10 a of the fixed piece 10, the catheter 60 is held at a position separated from the body surface 67 in the fixed tool 1. Unlike the present embodiment, when the fixed piece 10 does not include the holding protrusion 12 and the catheter 60 is held by the upper surface 10 a of the fixed piece 10, the catheter 60 led out from the puncture position 65 has the puncture position 65 and the fixture 1. Is curved upwardly so as to be separated from the body surface 67, and thereafter is curved in an “S” shape such that it descends to the upper surface 10 a of the fixing piece 10 in the fixture 1. When the catheter 60 is curved in an S shape in this way, there is a high possibility that the fixture 1 is separated from the body surface 67 due to the elastic restoring force of the catheter 60 or a locally bent kink occurs in the catheter 60. Holding the catheter 60 with the tip of the holding projection 12 protruding from the upper surface 10a of the fixing piece 10 as in the present embodiment alleviates the bending of the catheter 60 in an S shape, so the body surface of the fixing device 1 This is advantageous in preventing separation from 67 and kinking of the catheter 60.

  The movable piece 20 extends along the longitudinal direction of the catheter 60 beyond the holding portion (the holding protrusion 12 in this embodiment) where the fixed piece 10 holds the catheter 60. For this reason, the movable piece 20 can be brought closer to the puncture position 65 than the holding portion. Such a movable piece 20 extends to the holding portion (holding protrusion 12) in the fixture 1 while regulating the height of the catheter 60 so that the catheter 60 led out from the puncture position 65 is not greatly separated from the body surface 67. invite. This is also advantageous to alleviate the bending of the catheter 60 in an S shape. Further, since the puncture position 65 and the holding portion (holding protrusion 12) can be separated from each other, the catheter 60 can be appropriately bent and deformed in the horizontal plane between the puncture position 65 and the holding portion.

  The above embodiments are merely examples. The present invention is not limited to the above embodiment, and can be modified as appropriate.

  The shape, number and arrangement of the guide ribs 11a and 11b and the holding projections 12 provided on the upper surface 10a of the fixed piece 10 can be arbitrarily changed.

  For example, the number of holding protrusions 12 need not be two, and may be one or three or more. The holding protrusion 12 does not need to be a rib-like protrusion. For example, as shown in FIG. 7, the holding protrusion 12 may be a protrusion having a relatively large area and a flat top surface. In this case, the catheter 60 is fixed between the top surface of the holding projection 12 and the inner surface 20 a of the movable piece 20. Alternatively, the holding protrusion 12 may be omitted, and the upper surface 10a of the fixed piece 10 may be configured to hold the catheter 60. In this case, the upper surface 10 a constitutes a holding unit that holds the catheter 60.

  The guide ribs 11a and 11b are effective in regulating the position of the catheter 60 in the Y-axis direction when the movable piece 20 is in the open position, the half-open position, and the closed position. However, one or both of the guide rib 11a and the guide rib 11b may be omitted.

  The shape, number, arrangement, and the like of the locking protrusions 21 and the restricting protrusions 22 provided on the inner surface 20a of the movable piece 20 can be arbitrarily changed.

  The locking protrusion 21 and / or the restricting protrusion 22 may be continuous without being divided in the X-axis direction. The number of the locking projections 21 is not necessarily two, and may be one or three or more. The number of the restricting protrusions 22 is not necessarily two, and may be one or three or more. Alternatively, the regulation protrusion 22 may be omitted. A protrusion similar to the holding protrusion 12 of the fixed piece 10 may be provided on the inner surface 20 a of the movable piece 20. In this case, when the movable piece 20 is in the closed position, the tip of the protrusion holds the catheter 60.

  As shown in FIG. 8, a compressible sheet 55 may be attached to the inner surface 20 a of the movable piece 20. When the movable piece 20 is in the closed position (see FIGS. 3A, 3B, and 6A), the sheet 55 is compressed and deformed by being pressed by the catheter 60. This reduces the deformation of the catheter 60 in the diametrical direction, which is advantageous in preventing the flow path in the catheter 60 from narrowing. In addition, since the contact area between the seat 55 and the catheter 60 is increased, it is advantageous to firmly fix the catheter 60 to the fixture 1 without sliding. Although there is no restriction | limiting as the sheet | seat 55, For example, a silicone sheet can be used. The sheet 55 may be provided on the fixed piece 10 in addition to or instead of the movable piece 20.

  The shapes of the fixed piece 10 and the movable piece 20 can be arbitrarily changed.

  In said embodiment, although the fixed piece 10 and the movable piece 20 had the substantially same planar view shape, this invention is not limited to this. One of the fixed piece 10 and the movable piece 20 may be larger than the other. For example, the movable piece 20 may protrude beyond the fixed piece 10 in the X-axis direction (that is, the longitudinal direction of the catheter 60). In this case, the fixture 1 can be fixed to the body surface 67 such that the portion of the movable piece 20 in the closed position that protrudes from the fixed piece 10 is located near or above the puncture position 65 of the catheter 60. The protruding portion of the movable piece 20 can cover the catheter 60 so that the catheter 60 does not rise upward (for example, higher than the movable piece 20) so as to be far away from the body surface 67.

  The fixing piece 10 may terminate at the position of the holding protrusion 12 in the X-axis direction.

  The configuration of the lock mechanism can also be arbitrarily changed. The engagement structure constituting the lock mechanism does not need to be the claw 41 and the claw 44, and may have any configuration that can be engaged with each other, such as a convex portion and a convex portion, or a convex portion and a concave portion. The lock plate 43 does not need to pass through the through hole 26 provided in the movable piece 20. For example, the lock plate 43 may be rotatably provided on the outer peripheral edge of the movable piece 20. The lock plate 43 may be cantilevered instead of being held in a seesaw shape. In this case, the engagement structure (for example, the claw 44) and the release piece for releasing the lock state are provided at or near the free end. A displaceable lock plate 43 may be provided on the fixed piece 10.

  The hinge mechanism 30 does not have to be a three-point hinge, and may have any configuration that can bias the movable piece 20 toward the open position and the half-open position, such as a butterfly hinge. Moreover, the hinge mechanism 30 may be comprised only with the simple thin part which does not generate | occur | produce such an urging | biasing force but can be bent and deformed. In this case, in order to hold the movable piece 20 in the open position and the half-open position, another mechanism other than the hinge mechanism is provided. Another mechanism is not limited, but may be an engagement structure that engages the movable piece 20 when the movable piece 20 is in the open position and the half-open position, for example.

  In the above embodiment, the movable piece 20 in the open position is substantially parallel to the XY plane (see FIGS. 1A and 1C). However, the open position of the movable piece 20 is not limited to this, and the movable piece 20 is fixed. The open position of the movable piece 20 may be set at a position inclined with respect to the piece 10. However, the open position of the movable piece 20 is preferably set so that the catheter 60 can be inserted into and removed from the fixture 1 with the movable piece 20 in the open position. Although the rotation angle between the open position and the closed position of the movable piece 20 is not limited, it is preferably 90 degrees or more, more preferably 120 degrees or more, and particularly preferably 135 degrees or more. The upper limit of the rotation angle is not limited, but is preferably 180 degrees or less.

  In the above embodiment, after fixing the fixture 1 to the patient's body surface, the catheter 60 is fixed to the fixture 1. On the contrary, after fixing the catheter 60 to the fixture 1, the fixture 1 is fixed. May be fixed to the patient's body surface. In this case as well, the posture of the catheter 60 can be adjusted after fixing the fixture 1 to the patient.

  The catheter to which the fixing device of the present invention is fixed is not limited to the catheter used in percutaneous vasodilatation, and may be any other catheter. For example, the fixture of the present invention can be used to fix a catheter used for infusion or a catheter used for enteral nutrition (for example, a nasal catheter or a PEG (Percutaneous Endoscopic Gastrostomy) catheter).

  The present invention can be widely used as a fixing tool for fixing a medical catheter to a patient. The type of catheter is not limited, but a relatively small diameter catheter used in percutaneous vasodilatation is preferred. Especially, it can utilize especially preferably as a fixing tool for fixing the catheter directly punctured to the blood vessel.

DESCRIPTION OF SYMBOLS 1 Catheter fixing tool 10 Fixing piece 12 Holding protrusion (holding part)
20 movable piece 21 locking projection 22 regulating projection 30 hinge mechanism 41, 44 claw (lock mechanism engagement structure)
45 Release piece 60 Catheter 67 Body surface

Claims (7)

A fixed piece fixed to the patient's body surface, a movable piece, a hinge mechanism for rotatably connecting the movable piece to the fixed piece, and a closed position where the movable piece is superimposed on the fixed piece. A catheter fixture comprising a locking mechanism for maintaining the movable piece,
The catheter fixture is configured to hold a catheter between the fixed piece and the movable piece in the closed position,
The catheter fixture is configured such that the movable piece is held in an open position where the movable piece is separated from the fixed piece, and a half-open position between the open position and the closed position. And
The movable piece includes a locking projection protruding from a surface facing the fixed piece when in the closed position,
The catheter fixing tool, wherein the locking protrusion locks the catheter so that the catheter does not come out between the fixed piece and the movable piece when the movable piece is in the half-open position. The movable piece further includes a regulation protrusion protruding from a surface facing the fixed piece when in the closed position,
The catheter fixture according to claim 1, wherein the restricting protrusion locks the catheter so that the catheter does not approach the hinge mechanism when the movable piece is in the half-open position.   The catheter fixture according to claim 1 or 2, wherein the lock mechanism is configured to be automatically activated when the movable piece moves from the half-open position to the closed position. The lock mechanism has an engagement structure provided on each of the fixed piece and the movable piece so as to engage with each other when the movable piece is in the closed position,
The engagement structure provided on one of the fixed piece and the movable piece is elastically displaceable,
The catheter fixture according to any one of claims 1 to 3, wherein the one of the fixed piece and the movable piece includes a release piece that elastically displaces the engagement structure.   The hinge mechanism biases the movable piece so that the movable piece moves toward the open position or the half-open position when the movable piece is in a position other than the open position and the half-open position. The catheter fixing tool as described in any one of -4. The fixed piece includes a holding protrusion protruding toward the movable piece in the closed position,
The catheter fixture according to any one of claims 1 to 5, wherein a catheter is held between the holding projection and the movable piece when the movable piece is in the closed position.   The movable piece extends along a longitudinal direction of the catheter beyond the holding portion where the fixed piece holds the catheter when the movable piece is in the closed position. The catheter fixture according to 1.

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