JP2024099243A - Wire holder - Google Patents

Abstract

To provide a wire holder capable of performing movement in an axial direction and rotation in a circumferential direction of a wire inserted into a catheter simply by operating it by one hand in a state of being connected to the catheter irrespective of the outer diameter of the wire.SOLUTION: A wire holder 10 for holding a guide wire 120 inserted into a catheter 110 includes: a housing 30 in which a passage 37 is formed; a first roller 50 rotatably disposed in the housing 30, in which a first surface 52 is formed on the outer peripheral surface; a second roller 60 rotatably disposed in the housing 30, in which a second surface 62 is formed on the outer peripheral surface; an energizing part 70 for moving the first surface 52 and the second surface 62 in a direction that they get close to each other by energizing a shaft for supporting at least one of the first roller 50 and the second roller 60; and a connection part 20 disposed at the tip of the housing 30 and connected to the catheter 110, in which a tip opening 24 communicated with the passage 37 is formed. Part of at least one of the first roller 50 and the second roller 60 is exposed to the outside from the housing 30.SELECTED DRAWING: Figure 2

Description

The present invention relates to a wire holder that holds a long wire to be inserted into a living body.

A guidewire is a medical device that is inserted into blood vessels to guide a catheter for intravascular treatment to the desired location. The guidewire is inserted into the catheter through a hub located at the base end of the catheter.

In order to improve operability, a guidewire may have a guidewire hub or torque device attached to the base end. Existing guidewire hubs and torque devices can be difficult to operate because they are located away from the catheter hub. The torque device can adjust the distance from the catheter hub, but in order to adjust it, it is necessary to first release the fixation to the guidewire, which reduces operability. In order to eliminate such a reduction in operability, Patent Document 1 describes a holder that can be connected so that torque can be applied to the guidewire and that has rollers that come into contact with the guidewire so that the axial position in which the guidewire is held can be changed.

Japanese Patent Application Publication No. 5-208051

In the holder described in Patent Document 1, grooves are provided in the rollers, and the guidewire is held by the compressive force between the fixed rollers. For this reason, the guidewire cannot be held properly unless the outer diameter of the guidewire is a size that matches the groove.

The present invention has been made to solve the above-mentioned problems, and aims to provide a wire holder that can move the wire inserted in the catheter in the axial direction and rotate it in the circumferential direction by simply operating it with one hand while connected to the catheter, regardless of the outer diameter of the wire.

The above objective is achieved by the invention described in (1) below.

(1) The wire holder according to the present invention is a wire holder for holding a wire to be inserted into a catheter, and includes a housing having a passageway formed from the tip to the base end, a first roller rotatably arranged relative to the housing and having a first surface formed on its outer circumferential surface, a second roller rotatably arranged relative to the housing and having a second surface formed on its outer circumferential surface, a biasing section that biases an axis supporting at least one of the first roller or the second roller to move the first surface and the second surface in a direction toward each other, and a connection section that is arranged at the tip of the housing and can be connected to the catheter and has a tip opening formed therein that communicates with the passageway, and a part of at least one of the first roller or the second roller is exposed to the outside from the housing, and by rotating at least one of the first roller or the second roller exposed from the housing, the wire held by the biasing force of the biasing section between the first surface and the second surface through the passageway can be moved along the axial direction of the wire.

The wire holder described in (1) above can move the axis of at least one of the first roller or the second roller by being biased by the biasing portion, so that the rotational force of the first roller and the second roller can be effectively transmitted to the wire regardless of the outer diameter of the wire. Therefore, the wire holder can move the wire inserted in the catheter in the axial direction by simply operating the first roller or the second roller with one finger of one hand while connected to the catheter, regardless of the outer diameter of the wire.

(2) The wire holder described in (1) above has a wire fixing portion disposed in the housing, and the wire fixing portion may have a fixing contact portion capable of contacting the wire passing through the passage, and a fixing operation portion exposed to the outside of the housing. This allows the surgeon to bring the fixing contact portion into contact with the wire and fix the wire to the housing simply by operating the fixing operation portion. This allows the surgeon to easily move the wire together with the catheter fixed to the wire holder by the connection portion.

(3) In the wire holder described in (1) or (2) above, the shaft supporting the first roller or the second roller may have an operating protrusion protruding outside the housing, and the housing may have a shaft groove through which the shaft of the first roller or the second roller passes and which movably holds the shaft, and the shaft groove may have a separation position in which the shaft is disposed to separate the first roller and the second roller, a contact position in which the shaft is disposed to bring the first roller and the second roller into contact, and a rest position in a direction different from the direction toward the contact position as viewed from the separation position, in which the shaft is disposed to maintain the first roller and the second roller in a separated state by the biasing force of the biasing part. As a result, the wire holder can maintain the first roller and the second roller in a separated state by disposing the shaft in the rest position of the shaft groove, making it easy to insert and remove the wire into the wire holder.

(4) In the wire holder described in any one of (1) to (3) above, the housing includes a first housing to which the first roller is rotatably connected, a second housing to which the second roller is rotatably connected and which can be separated from the first housing to open the passage, a hinge that connects the first housing and the second housing so as to be openable and closable, and a closed holder that holds the first housing and the second housing in a closed state, and the connection part may include a connection passage that communicates with the passage and opens at the tip opening, and a slit that is formed from the tip to the base end of the connection part and opens the connection passage on the outer circumferential surface of the connection part. As a result, the wire holder can place a wire through the slit in the passage of the housing with the first housing and the second housing open, so that it can hold a wire that has some mechanism at its base end, such as a delivery wire of an embolization coil.

FIG. 2 is a plan view showing the wire holder according to the first embodiment. 2A and 2B are diagrams showing a wire holder according to a first embodiment, in which (A) is a longitudinal sectional view and (B) is a sectional view taken along line AA in FIG. 2A. 3A and 3B are diagrams showing a state in which a guide wire is held by the wire holder according to the first embodiment, in which (A) is a longitudinal cross-sectional view, and (B) is a cross-sectional view taken along line BB in FIG. 3A. FIG. 11 is a plan view showing a wire holder according to a second embodiment. 5A and 5B are diagrams showing a wire holder according to a second embodiment, in which (A) is a longitudinal sectional view and (B) is a sectional view taken along line CC of FIG. 5A. FIG. 11 is a longitudinal cross-sectional view showing a state in which a guide wire is held by a wire holder according to a second embodiment. FIG. 13 is a plan view showing a wire holder according to a third embodiment. 8A and 8B are diagrams showing a wire holder according to a third embodiment, in which (A) is a longitudinal sectional view and (B) is a sectional view taken along line DD in FIG. 8A. 9A and 9B are diagrams showing a state in which a guide wire is held by a wire holder according to a third embodiment, in which (A) is a longitudinal cross-sectional view, and (B) is a cross-sectional view taken along line E-E of FIG. 9A. 10A and 10B are diagrams showing a resting state in which the first roller and the second roller are separated by the wire holder of the third embodiment, where (A) is a longitudinal cross-sectional view and (B) is a cross-sectional view along line F-F of FIG. 10A. 11A and 11B are diagrams showing a wire holder according to a fourth embodiment, where (A) is a longitudinal sectional view and (B) is a sectional view taken along line GG in FIG. 11A. FIG. 13 is a plan view showing a wire holder according to a fifth embodiment. FIG. 13 is a vertical cross-sectional view showing a wire holder according to a fifth embodiment. 14A and 14B are cross-sectional views taken along the line HH in FIG. 13, in which (A) shows the housing in a closed state and (B) shows the housing in an open state.

Below, an embodiment of the present invention will be described with reference to the drawings. Note that dimensions in the drawings may be exaggerated for convenience of explanation and may differ from the actual dimensions. Furthermore, in this specification and the drawings, components having substantially the same functions are given the same reference numerals to avoid redundant explanation. In this specification, the side of the wire holder that is connected to the catheter will be referred to as the "distal side" and the opposite side as the "base side."

First Embodiment
1 and 2, the wire holder 10 according to the first embodiment is a device that can be connected to a catheter hub 111 at the base end of a catheter 110 for performing intravascular treatment, and is used to rotate a guidewire 120 (wire) inserted into the catheter 110 in a rotational direction R and move it in an axial direction X. Note that the axial direction X refers to a direction parallel to the direction in which the long guidewire 120 extends, and the rotational direction R refers to a direction of rotation around the axial direction X.

The wire holder 10 has a connection part 20 that can be connected to a catheter hub 111, a housing 30 that is disposed on the base end side of the connection part 20 and has a passage 37 formed from the tip to the base end through which the guide wire 120 passes, a first roller 50 and a second roller 60 that can be operated by the surgeon to move the guide wire 120, a first shaft 51 that rotatably supports the first roller 50 relative to the housing 30, a second shaft 61 that rotatably supports the second roller 60 relative to the housing 30, and at least one biasing part 70 that biases the first shaft 51 and the second shaft 61 in a direction to bring them closer together.

The connection part 20 is connected to the tip of the housing 30 so as to be rotatable in the rotation direction R relative to the housing 30. The connection part 20 has a cylindrical connection tube 21 that protrudes toward the tip side so that it can be inserted into the opening of the catheter hub 111, a connection operation part 22 that surrounds the outer periphery of the connection tube 21, and a connection side engagement part 26 that limits the movement of the connection part 20 in the axial direction X relative to the housing 30. The connection tube 21 has a connection passage 25 formed therein that communicates with the passage 37 of the housing 30, and a tip opening 24 where the connection passage 25 opens is formed on the tip surface.

The connection side engagement portion 26 engages with the housing side engagement portion 32 on the outer peripheral surface of a cylindrical engagement tube 31 formed at the tip of the housing 30. The connection side engagement portion 26 limits the movement of the connection portion 20 in the axial direction X relative to the housing 30. Note that the connection side engagement portion 26 does not limit the rotation of the connection portion 20 in the rotation direction R relative to the housing 30.

The outer peripheral surface of the connection operation part 22 is the part that the surgeon rotates to connect the connection part 20 to the catheter hub 111. The connection operation part 22 has an internal thread 27 on its inner peripheral surface into which the protrusion 112 formed on the outer peripheral surface of the catheter hub 111 can be screwed.

The housing 30 is connected to the base end of the connection part 20. The housing 30 has a passage 37 that extends linearly from the connection passage 25 of the connection part 20 toward the base end, a cylindrical part 35 that is grasped and operated by the surgeon, a first storage part 33 that stores the first roller 50, and a second storage part 34 that stores the second roller 60.

The passage 37 has a communication section 36 where the first storage section 33 and the second storage section 34 are connected, a first passage 38 located on the tip side of the communication section 36, and a second passage 39 located on the base end side of the communication section 36. The second passage 39 has a base end opening 40 that opens at the base end.

The cylindrical portion 35 is formed in a cylindrical shape with an axis parallel to the axial direction X on the base end side of the connection portion 20. The shape of the cylindrical portion 35 is not particularly limited. The part that the surgeon grasps and operates does not have to be the cylindrical portion 35.

The first storage section 33 rotatably stores a portion of the first roller 50, which is generally disk-shaped or generally cylindrical. The first storage section 33 communicates with the communication section 36, and opens to the outside of the housing 30 at a first operation opening 41 formed on the side opposite to the side communicating with the communication section 36. In other words, the first operation opening 41 is positioned away from the communication section 36 in a direction perpendicular to the axial direction X.

The second storage section 34 rotatably stores a portion of the second roller 60, which is generally disk-shaped or generally cylindrical. The second storage section 34 communicates with the communication section 36 and is disposed on the opposite side of the communication section 36 from the first storage section 33. The second storage section 34 opens to the outside of the housing 30 at a second operation opening 42 formed on the opposite side to the side communicating with the communication section 36.

The housing 30 and the connection portion 20 are formed from a thermoplastic resin such as polycarbonate or polyamide.

The first roller 50 is a part that the surgeon operates with his/her fingers to move the guidewire 120 in the axial direction X, and is also a part that contacts the guidewire 120 to apply a force in the axial direction X to the guidewire 120. A part of the first roller 50 is exposed to the outside from the first storage section 33 through the first operation opening 41 of the housing 30. This exposed part of the first roller 50 is a part that the surgeon operates with his/her fingers.

The first roller 50 is disk-shaped (cylindrical) and rotatably connected to the housing 30 by a first shaft 51 that passes through the center of the disk (cylinder). The first shaft 51 extends perpendicular to the axial direction X at a position away from the communication portion 36. Both ends of the first shaft 51 are arranged in two shaft grooves 43 formed on the opposing inner wall surfaces of the first storage portion 33 so as to be rotatable and movable in a direction perpendicular to the axial direction X. The first shaft 51 may be fixed to the first roller 50, may be formed integrally with the first roller 50, or may be connected to the first roller 50 so as to be rotatable relative to the first roller 50. Each shaft groove 43 extends in a direction perpendicular to the axial direction X so that the first roller 50 can approach or move away from the second roller 60 together with the first shaft 51. The first shaft 51 may be arranged in the shaft groove 43 via a bearing or a collar (cylindrical member) to facilitate smooth rotation. The range in which the first shaft 51 can move along the shaft groove 43 in a direction perpendicular to the axial direction X is, for example, 1 mm.

The first surface 52, which is the outer peripheral surface of the first roller 50, is preferably formed of a rubber material or a hard material with multiple projections and recesses, such as a grindstone, so as to prevent slipping. The rubber material is, for example, natural rubber such as latex rubber, or synthetic rubber such as silicone rubber, urethane rubber, or butadiene rubber. Alternatively, the first surface 52 may be formed of a water absorbent such as a nonwoven fabric. When the surface of the guidewire 120 is coated with a hydrophilic material, wiping off the moisture with the water absorbent effectively reduces the slipperiness of the surface of the guidewire 120, and is therefore effective in improving the operability of the guidewire 120 by the first roller 50.

The second roller 60 is disk-shaped (cylindrical) and rotatably connected to the housing 30 by a second shaft 61 that passes through the center of the disk (cylinder). The second shaft 61 extends perpendicular to the axial direction X at a position away from the communication section 36. Both ends of the second shaft 61 are rotatably arranged in two shaft holes 44 formed on the opposing inner wall surfaces of the second storage section 34. The second shaft 61 may be fixed to the second roller 60, may be formed integrally with the second roller 60, or may be rotatably connected to the second roller 60 relative to the second roller 60. The second shaft 61 may be arranged in the shaft hole 44 via a bearing or collar to facilitate smooth rotation.

The second surface 62, which is the outer peripheral surface of the second roller 60, is preferably made of a rubber material or a hard material with multiple projections and recesses, such as a grindstone, to prevent slipping. The second roller 60 can be made of the same material as the first roller 50 described above.

The two biasing parts 70 have one end connected to the first shaft 51 and the other end connected to the second shaft 61, and apply a biasing force to bring the first shaft 51 and the second shaft 61 closer together. The two biasing parts 70 are, for example, coil springs, but are not limited to these as long as they can apply a biasing force to the first shaft 51 and the second shaft 61, and may be highly elastic materials such as rubber materials. The two biasing parts 70 are arranged on both sides of the first roller 50 and the second roller 60. As a result, the two biasing parts 70 can apply a biasing force uniformly to both sides of the first shaft 51 and the second shaft 61, thereby preventing the first roller 50 and the second roller 60 from tilting.

The number of the biasing unit 70 may be one or three or more. The biasing unit 70 may have one end connected to the first shaft 51 and the other end connected to the housing 30. The biasing unit 70 may have one end connected to the first shaft 51 and the other end connected to any position in the direction from the shaft groove 43 of the housing 30 to the shaft hole 44 (for example, a position between the shaft groove 43 and the shaft hole 44 of the housing 30, or a position beyond the shaft hole 44 from the shaft groove 43 of the housing 30 toward the shaft hole 44), and may apply a biasing force to bring the first shaft 51 and the second shaft 61 closer to each other. Alternatively, the biasing portion 70 may have one end connected to the first shaft 51 and the other end connected to a position in the opposite direction from the shaft groove 43 of the housing 30 toward the shaft hole 44 (for example, a position beyond the shaft groove 43 toward the shaft groove 43 from the shaft hole 44 of the housing 30), and may apply a biasing force to bring the first shaft 51 and the second shaft 61 closer together.

The first roller 50 and the second roller 60 may be the same size or different sizes. The surgeon can operate both or either of the first roller 50 and the second roller 60. Only the first roller 50 or the second roller 60 may be exposed from the housing 30. In this case, the surgeon can operate only the exposed first roller 50 or second roller 60.

In this embodiment, only the first shaft 51 supporting the first roller 50 is movable relative to the housing 30, and the second shaft 61 supporting the second roller 60 is immovable. This makes it easy for the first shaft 51 and the second shaft 61 to hold the guide wire 120 coaxially with the passage 37. Note that the wire holder 10 may be configured so that both the first shaft 51 and the second shaft 61 are movable relative to the housing 30.

Next, the operation of the wire holder 10 according to the first embodiment will be described.

In the wire holder 10 before use, the first roller 50 and the second roller 60 are in contact with each other at the first surface 52 and the second surface 62 due to the biasing force of the biasing portion 70. As shown in FIG. 3, the surgeon inserts the base end of the guide wire 120 inserted in the catheter 110 inserted in the blood vessel into the tip opening 24 of the wire holder 10. When the guide wire 120 reaches the communication portion 36 from the tip opening 24 through the first passage 38, it passes through the communication portion 36 while being sandwiched between the first surface 52 of the first roller 50 and the second surface 62 of the second roller 60, and is led out of the base end opening 40 through the second passage 39.

When the guide wire 120 is sandwiched between the first surface 52 of the first roller 50 and the second surface 62 of the second roller 60, the first shaft 51 that rotatably supports the first roller 50 moves along the shaft groove 43 in a direction away from the second shaft 61. Since the first shaft 51 and the first roller 50 are biased by the biasing unit 70, they are biased in a direction approaching the second shaft 61 and the second roller 60 while moving away from the second shaft 61 and the second roller 60. As a result, the guide wire 120 is held while receiving a compressive force from the first surface 52 of the first roller 50 and the second surface 62 of the second roller 60. Therefore, as long as the outer diameter of the guide wire 120 is within a predetermined range, the first roller 50 and the second roller 60 can grip the guide wire 120 with an appropriate compressive force regardless of the outer diameter. This allows the wire holder 10 to effectively transmit the rotational force of the first roller 50 and/or the second roller 60 to the guidewire 120, regardless of the outer diameter of the guidewire 120.

Next, the surgeon inserts the connection tube 21 of the wire holder 10 into the opening of the catheter hub 111 and rotates the connection operation part 22. This causes the female thread 27 of the connection operation part 22 to screw into the protrusion 112 of the catheter hub 111, connecting the wire holder 10 to the catheter hub 111.

When the surgeon wants to move the guidewire 120 in the axial direction X while the wire holder 10 is connected to the catheter 110, the surgeon rotates the first roller 50 and/or the second roller 60 with his/her fingers along the axial direction X. As a result, a force in the axial direction X from the first roller 50 and/or the second roller 60 acts on the guidewire 120 sandwiched between the first roller 50 and the second roller 60, and the guidewire 120 moves in the axial direction X. At this time, the first roller 50 and the second roller 60 rotate in the opposite directions, and the guidewire 120 moves in the same direction as the parts of the first roller 50 and the second roller 60 that are in contact with the guidewire 120 move. This allows the surgeon to precisely move the guidewire 120 in the axial direction X relative to the catheter 110 and the wire holder 10 with one finger.

Furthermore, when the surgeon wishes to rotate the guidewire 120 with the wire holder 10 connected to the catheter 110, the surgeon rotates the housing 30 in the rotational direction R relative to the connection part 20. This causes a force in the rotational direction R to act on the guidewire 120 sandwiched between the first roller 50 and the second roller 60, causing the guidewire 120 to rotate. This allows the surgeon to precisely rotate the guidewire 120 relative to the catheter 110 by rotating the housing 30 in the rotational direction R relative to the connection part 20.

As described above, the wire holder 10 according to the first embodiment is a wire holder 10 that holds a guide wire 120 to be inserted into a catheter 110, and includes a housing 30 in which a passage 37 is formed that penetrates from the tip to the base end, a first roller 50 that is rotatably arranged relative to the housing 30 and has a first surface 52 formed on its outer circumferential surface, a second roller 60 that is rotatably arranged relative to the housing 30 and has a second surface 62 formed on its outer circumferential surface, and a shaft that supports at least one of the first roller 50 or the second roller 60 is biased in a direction that brings the first surface 52 and the second surface 62 closer to each other. and a connection part 20 that is disposed at the tip of the housing 30 and connectable to the catheter 110, and has a tip opening 24 formed therein that communicates with the passage 37, and a part of at least one of the first roller 50 or the second roller 60 is exposed to the outside from the housing 30, and by rotating at least one of the first roller 50 or the second roller 60 exposed from the housing 30, it is possible to move the guidewire 120, which has passed through the passage 37 and is held between the first surface 52 and the second surface 62 by the biasing force of the biasing part 70, along the axial direction of the wire. As a result, the wire holder 10 is capable of effectively transmitting the rotational force of the first roller 50 or the second roller 60 to the guidewire 120 regardless of the outer diameter of the guidewire 120, because the axis of at least one of the first roller 50 or the second roller 60 is biased by the biasing part 70. Therefore, regardless of the outer diameter of the guidewire 120, the wire holder 10 can move the guidewire 120 inserted into the catheter 110 in the axial direction X simply by operating the first roller 50 or the second roller 60 with one finger while connected to the catheter 110.

Second Embodiment
4 and 5, the wire holder 10 according to the second embodiment differs from the first embodiment in that it has a wire fixing portion 80 for fixing the guide wire 120 to the housing 30. Note that parts having functions common to those of the first embodiment are given the same reference numerals and descriptions thereof will be omitted.

The housing 30 has a fixing holder 45 that holds the wire fixing part 80 at a position of the passage 37 (the first passage 38 in this embodiment). The fixing holder 45 is a portion of the passage 37 where the diameter is partially larger, and has a fixing passage 46 in which the wire fixing part 80 can slide, a tip side tapered part 47 that is tapered toward the tip on the tip side of the fixing passage 46, a base side tapered part 48 that is tapered toward the base side of the fixing passage 46, and two operation through holes 49 that penetrate from the fixing passage 46 to the outside of the housing 30 in a direction perpendicular to the axial direction X.

The two operation through holes 49 extend from the fixing passage 46 in a direction perpendicular to the axial direction X and perpendicular to the plane in which the first roller 50 and the second roller 60 extend. The plane in which the first roller 50 and the second roller 60 extend is a plane passing through the central axis of the linearly extending passage 37 and perpendicular to the rotation axes of the first shaft 51 and the second shaft 52. The two operation through holes 49 are disposed on the tip side of the area in the housing 30 in which the first roller 50 and the second roller 60 exist. This allows the operation through hole 49 to penetrate to the outside of the housing 30 without interfering with the first roller 50 and the second roller 60. The two operation through holes 49 are formed in a plane-symmetrical shape on opposite sides of the fixing passage 46.

The distal tapered portion 47 and the proximal tapered portion 48 smoothly contact the guidewire 120 passing through the passage 37. The distal tapered portion 47 has the role of deforming a part of the wire fixing portion 80 held by the fixing holder 45 in order to fix the guidewire 120 to the housing 30. The proximal tapered portion 48 has the role of limiting the sliding range of the wire fixing portion 80 in the axial direction X and suppressing deviation of the guidewire 80 from the passage 37.

The wire fixing part 80 has a sliding part 81 that is held in the fixing passage 46 so as to be slidable in the axial direction X, a fixing contact part 82 that protrudes from the sliding part 81 toward the tip side, and two fixing operation parts 83 that are exposed to the outside of the housing 30 from the sliding part 81 through two operation through holes 49. The sliding part 81 is a cylindrical part in which a through hole is formed through which the guide wire 120 that passes through the passage 37 passes, and is slidable in the axial direction X along the inner wall surface of the fixing passage 46.

The fixing contact portion 82 has a number of claws 84 that protrude from the tip of the sliding portion 81 toward the tip side. The multiple claws 84 are arranged approximately evenly in a row with gaps in the circumferential direction so as to surround the guide wire 120 passing through the passage 37. The multiple claws 84 can contact the guide wire 120 passing through the surrounding space by deforming so as to bend toward the surrounding space. In other words, the sliding portion 81 and the fixing contact portion 82 form a collet that can hold the guide wire 120. For example, the sliding portion 81 and the fixing contact portion 82 are a three-jaw collet. The number of claws 84 is not limited.

The two fixing operation parts 83 can slide in the axial direction X within the operation through hole 49. The two fixing operation parts 83 are formed in a plane-symmetrical shape on the opposite side of the sliding part 81. The two fixing operation parts 83 protrude to the outside from the operation through hole 49. The surgeon can move the wire fixing part 80 along the axial direction X as shown in FIG. 6 by operating the parts of the two fixing operation parts 83 protruding from the operation through hole 49 with his/her fingers. Because the two fixing operation parts 83 are formed in a plane-symmetrical shape, the sliding part 81 can move smoothly within the fixing passage 46 without tilting.

When the guide wire 120 is passed through the passage 37 and the two fixing operation parts 83 are positioned at the base end of the operation through hole 49, the fixing contact part 82 is not in contact with the tip side tapered part 47 and is not bent. This state is defined as an unfixed state in which the guide wire 120 passing through the passage 37 can move in the axial direction X and rotate in the rotational direction R relative to the housing 30.

As shown in FIG. 6, when the guide wire 120 is passed through the passage 37 and the two fixing operation parts 83 move toward the tip side of the operation through hole 49, the multiple claws 84 of the fixing contact part 82 bend toward the surrounding space by contacting the tip side tapered part 47, and clamp and fix the surrounding guide wire 120. This state is defined as a fixed state in which the guide wire 120 passing through the passage 37 cannot move in the axial direction X or rotate in the rotational direction R relative to the housing 30.

The wire fixing portion 80 is preferably made of a flexible material, such as a thermoplastic resin such as polyethylene or polypropylene.

Next, the operation of the wire holder 10 according to the second embodiment will be described.

When the surgeon wants to fix the guidewire 120 to the wire holder 10, as shown in FIG. 6, the surgeon moves the two fixing operation parts 83 toward the tip side relative to the housing 30. This causes the multiple claws 84 of the fixing contact part 82 to contact the tip side tapered part 47 and bend toward the surrounding space, clamping and fixing the surrounding guidewire 120. As a result, the wire holder 10 is in a fixed state. After this, the surgeon can rotate the guidewire or connect the wire holder 10 to the catheter 110 to move the guidewire 120 and the catheter 110 together while maintaining the protruding length of the guidewire 120 from the tip of the catheter 110.

As described above, the wire holder 10 according to the second embodiment has a wire fixing portion 80 disposed in the housing 30, and the wire fixing portion 80 has a fixing contact portion 82 capable of contacting the guidewire 120 passing through the passage 37, and a fixing operation portion 83 exposed to the outside of the housing 30. This allows the surgeon to bring the fixing contact portion 82 into contact with the guidewire 120 and fix the guidewire 120 to the housing 30 simply by operating the fixing operation portion 83. This allows the surgeon to easily move the guidewire 120 together with the catheter 110 fixed to the wire holder 10 by the connection portion 20.

Third Embodiment
7 and 8, the wire holder 10 according to the third embodiment differs from the first embodiment in the configuration of the shaft groove 43 and the first shaft 51. Note that parts having functions common to the first embodiment are given the same reference numerals and descriptions thereof will be omitted.

In the third embodiment, the shaft groove 43 that movably holds the first shaft 51 is formed through the housing 30. The shaft groove 43 has a separation position P1, a contact position P2, and a rest position P3. The direction from the separation position P1 to the contact position P2 is perpendicular to the axial direction X, and is the direction from the separation position P1 to the communication portion 36. By arranging the first shaft 51 at the contact position P2, the wire holder 10 is in a state in which the first roller 50 and the second roller 60 are in contact with each other. By arranging the first shaft 51 at the separation position P1, the wire holder 10 is in a state in which the first roller 50 and the second roller 60 are separated from each other. When the first shaft 51 is at the separation position P1 or closer to the contact position P2 than the separation position P1, as shown in FIG. 9, the first shaft 51 is subjected to a biasing force from the separation position P1 to the contact position P2 by the biasing portion 70. Furthermore, when viewed from the separated position P1, the rest position P3 is located in a direction different from the direction toward the contact position P2. The direction from the separated position P1 toward the rest position P3 differs from the direction from the separated position P1 toward the contact position P2 by an angle greater than 0 degrees and less than 90 degrees. When the first shaft 51 is located at the rest position P3, it is maintained at the rest position P3 by the biasing force of the biasing portion 70. As a result, by disposing the first shaft 51 at the rest position P3, the wire holder 10 can maintain the first roller 50 and the second roller 60 in a separated state, as shown in FIG. 10.

The first axis 51 has operation protrusions 53 at both ends that protrude outside the housing 30 and can be operated by the surgeon.

Next, the operation of the wire holder 10 according to the third embodiment will be described.

As shown in FIG. 9, the wire holder 10 has a first shaft 51 that can move between the contact position P2 and the separation position P1 of the shaft groove 43, and thus, as in the first embodiment, the guide wire 120 can be sandwiched and held between the first roller 50 and the second roller 60 by the biasing force of the biasing section 70. Therefore, the wire holder 10 can effectively transmit the rotational force of the first roller 50 and/or the second roller 60 to the guide wire 120 regardless of the outer diameter of the guide wire 120.

When the surgeon wishes to maintain the first roller 50 and the second roller 60 apart, as shown in FIG. 10, the surgeon operates the operating protrusion 53 to forcibly move the first shaft 51 to the rest position P3 via the separation position P1 of the shaft groove 43. The first shaft 51 that has moved to the rest position P3 is stably maintained at the rest position P3 by the biasing force of the biasing portion 70. This allows the surgeon to easily insert and remove the guide wire 120 into the wire holder 10.

When the surgeon wants to bring the first roller 50 and the second roller 60 into contact with each other, or wants to hold the guide wire 120 between the first roller 50 and the second roller 60, the surgeon operates the operating protrusion 53 to move the first shaft 51 from the rest position P3 to the separation position P1 against the biasing force of the biasing unit 70. The first shaft 51 that has moved from the rest position P3 to the separation position P1 moves toward the contact position P2 along the shaft groove 43 due to the biasing force of the biasing unit 70. As a result, as shown in FIG. 8, the first roller 50 approaches and contacts the second roller 60, or as shown in FIG. 9, the guide wire 120 is sandwiched and held between the first roller 50 and the second roller 60.

As described above, in the wire holder 10 according to the third embodiment, the first shaft 51 supporting the first roller 50 has an operating protrusion 53 that protrudes outside the housing 30, and the housing 30 has an shaft groove 43 through which the first shaft 51 of the first roller 50 passes and which movably holds the first shaft 51. The shaft groove 43 has a separation position P1 where the first shaft 51 is positioned to separate the first roller 50 and the second roller 60, a contact position P2 where the first shaft 51 is positioned to bring the first roller 50 and the second roller 60 into contact, and a rest position P3 which is located in a direction different from the direction toward the contact position P2 as viewed from the separation position P1, and where the first shaft 51 is positioned to maintain the first roller 50 and the second roller 60 apart due to the biasing force of the biasing section 70. As a result, by positioning the first shaft 51 in the rest position P3 of the shaft groove 43, the wire holder 10 can maintain the first roller 50 and the second roller 60 in a separated state, making it easy to insert and remove the guide wire 120 into the wire holder 10.

The shaft groove 43 may be formed to allow movement of the second shaft 61 supporting the second roller 60, instead of the first shaft 51.

Fourth Embodiment
11, the wire holder 10 according to the fourth embodiment differs from the first embodiment in that it has two first rollers 50. Note that parts having the same functions as those in the first embodiment are denoted by the same reference numerals and will not be described.

The wire holder 10 has two first rollers 50 arranged in the axial direction X in the first storage section 33. A plurality of shaft grooves 43 are formed in the housing 30 to movably hold the first shafts 51 supporting each of the first rollers 50. The two first shafts 51 are arranged on the tip side and base side of the second shaft 61. The biasing section 70 has one end connected to the first shaft 51 and the other end connected to a surface away from the communication section 36 on the inner wall surface of the first storage section 33 of the housing 30, and applies a biasing force to move the first shaft 51 away from the inner wall surface of the first storage section 33 of the housing 30. As a result, each of the first rollers 50 is biased toward the second roller 60. The two first rollers 50 are entirely arranged inside the housing 30. In addition, the biasing unit 70 can be configured such that one end is connected to the first shaft 51 and the other end is connected to the inner wall surface of the second storage section 34 of the housing 30, thereby biasing each of the first rollers 50 toward the second rollers 60.

Next, the operation of the wire holder 10 according to the fourth embodiment will be described.

The wire holder 10 can clamp the guide wire 120 passing through the passage 37 between the two first rollers 50 and one second roller 60 so as to bend the guide wire 120. As a result, the wire holder 10 has a high holding force and does not allow the guide wire 120 to slip easily between the first roller 50 and the second roller 60. Such a wire holder 10 is suitable for holding wires that require precise manipulation in the axial direction X, such as a delivery wire for an embolization coil.

The wire holder 10 according to the fourth embodiment does not have a cylindrical portion 35 for rotational operation as in the first to third embodiments described above, but may have one.

Fifth Embodiment
12 to 14, the wire holder 10 according to the fifth embodiment differs from the fourth embodiment in that the housing 30 is separable. Note that parts having the same functions as the first to fourth embodiments are given the same reference numerals and will not be described.

The housing 30 has a first housing 131 to which the first roller 50 is rotatably connected, a second housing 132 to which the second roller 60 is rotatably connected and which can be separated from the first housing 131 to open the passage 37, a hinge 133 that connects the first housing 131 and the second housing 132 so as to be openable and closable, and a closing holder 134 that holds the first housing 131 and the second housing 132 in a closed state. The closing holder 134 has a closing protrusion 135 formed on the outer wall surface of the second housing 132 and a closing hook 136 that can be hooked onto the closing protrusion 135 formed on the first housing 131. The engaging tube 31 of the housing 30 has a housing-side slit 137 that opens the passage 37 to the outer circumferential surface of the engaging tube 31.

The connection part 20 has a slit 28 formed from the tip to the base end of the connection part 20, which opens the connection passage 25 to the outer peripheral surface of the connection part 20.

Next, the operation of the wire holder 10 according to the fifth embodiment will be described.

When the surgeon wishes to hold and operate a wire 140 having some mechanism at its base end using the wire holder 10, as shown in FIG. 14(B), the surgeon releases the closing hook 136 from the closing protrusion 135 to release the closing holder 134, and separates the second housing 132 from the first housing 131 while deforming the hinge 133. Note that the engaging tube 31 of the housing 30 surrounded by the connection part 20 cannot be separated, but a housing side slit 137 is formed. This opens the passage 37 of the housing 30 to the outside.

Next, the surgeon aligns the slit 28 of the connection part 20 with the housing side slit 137 of the engagement tube 31, and inserts the wire 140 from the slit 28 and the housing side slit 137 into the connection passage 25 of the connection part 20 and the passage 37 of the engagement tube 31. Next, the surgeon places the wire 140 in the divided passage 37 between the first housing 131 and the second housing 132.

Next, as shown in Figures 12 to 14(A), the surgeon closes the first housing 131 and the second housing 132, and engages the closing hook 136 with the closing protrusion 135. This causes the first housing 131 and the second housing 132 to be held closed by the closing holder 134. After this, the surgeon can rotate the second roller 60 to move the wire 140 in the axial direction X, or rotate the housing 30 in the rotational direction R relative to the connection part 20 to rotate the wire 140 relative to the catheter 110.

As described above, in the wire holder 10 according to the fifth embodiment, the housing 30 has a first housing 131 to which the first roller 50 is rotatably connected, a second housing 132 to which the second roller 60 is rotatably connected and which can be separated from the first housing 131 to open the passage 37, a hinge 133 which connects the first housing 131 and the second housing 132 so as to be able to open and close, and a closing holder 134 which holds the first housing 131 and the second housing 132 in a closed state, and the connection part 20 has a connection passage 25 which communicates with the passage 37 and opens at the tip opening 24, and a slit 28 which is formed from the tip to the base end of the connection part 20 and opens the connection passage 25 onto the outer peripheral surface of the connection part 20. This allows the wire holder 10 to place the wire 140 in the passage 37 of the housing 30 through the slit 28 with the first housing 131 and the second housing 132 open, so it can also hold wires 140 that have some kind of mechanism at the base end, such as a delivery wire for an embolization coil.

The present invention is not limited to the above-described embodiment, and various modifications can be made by those skilled in the art within the technical concept of the present invention. For example, the guidewire 120 may be inserted into a blood vessel, ureter, bile duct, fallopian tube, or hepatic duct. In addition, the wire held by the wire holder 10 is not limited to the guidewire 120 as long as it is a long, linear medical instrument.

In addition, the wire holder 10 according to the first to fifth embodiments may be used without being connected to the catheter hub 111 by the connection portion 20.

The configurations of the first to fifth embodiments may be combined as appropriate. For example, the configuration having the wire fixing portion 80 of the second embodiment or the configuration capable of maintaining the first roller 50 and the second roller 60 in a separated state of the third embodiment may be incorporated into other embodiments.

REFERENCE SIGNS LIST 10 Wire holder 20 Connection portion 24 Tip opening 25 Connection passage 28 Slit 30 Housing 36 Communication portion 37 Passage 40 Base opening 43 Shaft groove 44 Shaft hole 45 Fixing holder portion 46 Fixing passage 49 Operation through hole 50 First roller 51 First shaft (shaft)
52 First surface 53 Operation convex portion 60 Second roller 61 Second shaft (shaft)
62 Second surface 70 Pressurizing portion 80 Wire fixing portion 82 Fixing contact portion 83 Fixing operation portion 110 Catheter 111 Catheter hub 120 Guide wire (wire)
131 First casing 132 Second casing 133 Hinge 134 Closed holding part P1 Separated position P2 Contact position P3 Rest position R Rotation direction X Axial direction

Claims (4)

A wire holder for holding a wire to be inserted into a catheter,
A housing having a passageway extending from a tip end to a base end;
a first roller arranged rotatably relative to the housing and having a first surface formed on an outer circumferential surface thereof;
a second roller rotatably disposed relative to the housing and having a second surface formed on an outer circumferential surface thereof;
a biasing unit that biases a shaft supporting at least one of the first roller and the second roller to move the first surface and the second surface in a direction in which they approach each other;
a connecting portion that is disposed at a distal end portion of the housing and is connectable to the catheter, the connecting portion having a distal end opening that communicates with the passage;
a portion of at least one of the first roller and the second roller is exposed to the outside from the housing;
A wire holder capable of moving the wire, which is held by the force of the force generating portion between the first surface and the second surface through the passage, along the axial direction of the wire by rotating at least one of the first roller or the second roller exposed from the housing. A wire fixing portion is disposed in the housing,
The wire holder according to claim 1 , wherein the wire fixing portion has a fixing contact portion capable of contacting the wire passing through the passage, and a fixing operation portion exposed to the outside of the housing. a shaft supporting the first roller or the second roller has an operation protrusion protruding to the outside of the housing,
the housing has a shaft groove through which a shaft of the first roller or the second roller passes and which movably holds the shaft;
3. The wire holder according to claim 1, wherein the shaft groove has a separation position in which the shaft is positioned to separate the first roller and the second roller, a contact position in which the shaft is positioned to bring the first roller and the second roller into contact, and a rest position which is located in a direction different from the direction toward the contact position as viewed from the separation position, and in which the shaft is positioned to maintain the first roller and the second roller separated by the biasing force of the biasing portion. the housing includes a first housing to which the first roller is rotatably connected, a second housing to which the second roller is rotatably connected and which is separable from the first housing so as to open the passage, a hinge that connects the first housing and the second housing so as to be able to open and close, and a closing holding portion that holds the first housing and the second housing in a closed state;
3. A wire holder as described in claim 1 or 2, wherein the connection portion has a connection passage that communicates with the passage and opens at the tip opening, and a slit that is formed from the tip to the base end of the connection portion and opens the connection passage into the outer peripheral surface of the connection portion.

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