Guide wire shaping aid

Abstract

To provide a guide wire-shaping aid that can prevent an adhesive part between a pin part for use in the shaping of the tip end of the guide wire and a shaft part being held by an operator from being peeled in the shaping work of a guide wire, and thereby can improve workability of the shaping of the guide wire.SOLUTION: A guide wire-shaping aid 10 is used for shaping of the tip end of a guide wire. The guide wire-shaping aid has: a long pin part 20; a shaft part 30 including a tip and a base end, being a hollow member formed of a through-hole 31 from the tip to the base end, and having a pin part 20 inserted into the through-hole 31 from the tip side; and an adhesive part 50 for adhesively bonding the pin part 20 and the shaft part 30. The through-hole 31 has a bonding part 43 with the pin part 20 adhesively bonded to the tip side through the adhesive part 50. The bonding part 43 has at least one recess 47.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a guide wire shaping aid used for shaping the tip of a guide wire.

Background Art

[0002] A guide wire is a medical device that is inserted into a blood vessel ahead of a therapeutic medical device such as a catheter or a stent for performing endovascular treatment in order to guide the therapeutic medical device to a target site. When advancing the guide wire toward the target site in the blood vessel, the operator may deform the tip portion of the guide wire and impart a predetermined shape in order to facilitate blood vessel selection at a blood vessel bifurcation. In order to impart a shape to the tip of the guide wire, the operator may use an instrument capable of imparting a shape to the tip of the guide wire by pressing the tip of the guide wire. For example, Patent Document 1 describes a device including a main body portion having a hole portion into which the tip portion of the guide wire can be inserted and a gripping portion formed to extend from the main body portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When using the device described in Patent Document 1, since the main body portion is pressed against the guide wire by gripping the gripping portion, a strong force acts between the gripping portion and the main body portion. Therefore, when the main body portion and the gripping portion are separate members and the strength between the main body portion and the gripping portion is low, peeling may occur between the main body portion and the gripping portion, and the workability of shaping the guide wire may be reduced.

[0005] The present invention was made to solve the above-mentioned problems, and aims to provide a guide wire shaping aid that can suppress the separation of the adhesive between the pin portion used to shape the tip of the guide wire and the shaft portion held by the surgeon during the guide wire shaping process, thereby improving the workability of shaping the guide wire. [Means for solving the problem]

[0006] A guide wire shaping aid that achieves the above objective is a guide wire shaping aid used for shaping the tip of a guide wire, and is a hollow member having a long pin portion, a tip and a base end, with a through hole formed from the tip to the base end, a shaft portion into which the pin portion is inserted from the tip side into the through hole, and an adhesive portion that bonds the pin portion and the shaft portion, the through hole having a joint portion on the tip side to which the pin portion is bonded via the adhesive portion, and the joint portion having at least one recess The joint comprises a first joint and a second joint positioned on the tip side of the first joint and having a minimum inner diameter larger than the minimum inner diameter of the first joint, the outer diameter of the portion of the pin bonded to the first joint and the outer diameter of the portion bonded to the second joint being the same, and the recess is positioned in the second joint. ru. Another embodiment of a guide wire shaping aid that achieves the above objective is a guide wire shaping aid used for shaping the tip of a guide wire, comprising: a long pin portion; a tip and a base end, a hollow member having a through hole formed from the tip to the base end; a shaft portion into which the pin portion is inserted from the tip side into the through hole; and an adhesive portion for bonding the pin portion and the shaft portion, wherein the through hole has a joint portion on the tip side to which the pin portion is bonded via the adhesive portion, and a tapered portion positioned on the base end side of the joint portion and having an inner diameter that widens tapered toward the base end, and the joint portion has at least one recess. [Effects of the Invention]

[0007] As described above, the guide wire shaping aid has a joint provided in a through hole. This allows air to escape through the through hole when supplying adhesive to the gap between the shaft and pin portions to form the bonding area, enabling the bonding area to be properly formed within the desired range. Furthermore, because the joint has a recess, the adhesive portion bonding the joint and the pin portion enters the recess, providing a high shear strength through an anchoring effect. Therefore, delamination of the adhesive portion bonding the pin portion and the shaft portion during guide wire shaping can be suppressed, improving the workability of guide wire shaping.

[0008] The joint comprises a first joint and a second joint positioned on the tip side of the first joint and having an inner diameter larger than the inner diameter of the first joint. The outer diameter of the portion of the pin bonded to the first joint and the outer diameter of the portion bonded to the second joint are the same, and the recess may be positioned in the second joint. As a result, the clearance between the first joint and the pin is smaller than the clearance between the second joint and the pin, so that the bonded portion between the first joint and the pin has high shear strength, and the bonded portion between the second joint and the pin has high tensile strength. Furthermore, the bonded portion between the second joint and the pin can exert an anchoring effect by fitting into the recess of the second joint, thereby increasing the shear strength. Therefore, by having both a first joint and a second joint, the bonded portion can obtain overall high shear strength and high tensile strength. As a result, delamination of the bonded portion between the pin and the shaft can be effectively suppressed during the guide wire shaping process, improving the workability of guide wire shaping.

[0009] The adhesive portion may also block the through hole on the base end side of the pin portion. The recess may be formed in a groove shape on the inner circumferential surface of the second joint over a 360-degree angle in the circumferential direction. As a result, the adhesive portion that provides the anchoring effect is distributed over the entire circumferential direction of the second joint, thereby enabling high shear strength. This can more effectively suppress delamination of the adhesive portion and further improve the workability of shaping the guide wire.

[0010] The gap between the inner surface of the first joint and the outer surface of the pin may be 0.02 mm or less. This allows the guide wire shaping aid to exhibit strong shear strength at the adhesive joint. As a result, delamination of the adhesive joint between the pin and the shaft can be effectively suppressed, and the workability of shaping the guide wire can be further improved.

[0011] The through-hole may have an enlarged section on the tip side of the joint, with an inner diameter that gradually increases toward the tip. This allows the enlarged section to efficiently deliver the uncured adhesive supplied from the tip side of the through-hole to the joint during the manufacturing of the guide wire shaping aid. As a result, the bonded portion is properly formed within the desired range.

[0012] The ratio of the length of the connecting portion located inside the through-hole of the pin portion in the longitudinal direction to the total length of the pin portion in the longitudinal direction may be 1 / 5 or more and 1 / 3 or less. This ensures that the adhesive length of the pin portion to the shaft portion is sufficiently long compared to the length of the protruding portion that extends from the shaft portion and is subjected to external forces. This effectively suppresses the peeling of the adhesive between the pin portion and the shaft portion, improving the workability of shaping the guide wire. [Brief explanation of the drawing]

[0013] [Figure 1] This figure shows a guide wire shaping aid according to an embodiment, where (A) is a front view, (B) is a side view seen from arrow A in Figure 1(A), and (C) is a side view seen from arrow B in Figure 1(A). [Figure 2] This is a longitudinal cross-sectional view showing the shaft and pin sections before joining. [Figure 3] This is a magnified longitudinal cross-sectional view showing the vicinity of the bonding area between the shaft and the pin. [Figure 4] This diagram shows the cap section; (A) is a vertical cross-sectional view, and (B) is a cross-sectional view along the CC line in Figure 4(A). [Modes for carrying out the invention]

[0014] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the dimensional ratios in the drawings may be exaggerated for convenience of explanation and may differ from the actual ratios. Also, in this specification and the drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted. Further, in this specification, "X to Y" indicating a range includes X and Y and means "X or more and Y or less".

[0015] The guide wire shaping assist tool 10 according to this embodiment is a tool for imparting a shape to the tip of a guide wire. The guide wire shaping assist tool 10 includes a pin portion 20 for pressing the tip of the guide wire to impart a shape, a shaft portion 30 for holding the pin portion 20 and which an operator grips to press the tip of the guide wire against the pin portion 20, an adhesive portion 50 for adhering the pin portion 20 and the shaft portion 30, and a cap portion 60 for covering and protecting the pin portion 20.

[0016] As shown in FIGS. 1 and 2, the pin portion 20 has an elongated solid cylindrical shape having a straight long axis, and has a constant outer diameter over substantially the entire portion except for the chamfered portions at both ends in the long axis direction. The pin portion 20 has a connecting portion 21 disposed inside the shaft portion 30 and a protruding portion 22 protruding further toward the tip side than the tip of the shaft portion 30. The corner portions at both ends of the pin portion 20 are R-chamfered so as to be curved surfaces.

[0017] The pin portion 20 is preferably formed of a material having a high longitudinal elastic modulus so that the pin portion 20 does not bend during the shaping operation of the guide wire. For example, a metal such as stainless steel is preferably used.

[0018] The outer diameter of the pin portion 20 is 0.73 mm to 1.2 mm. Thereby, when the pin portion 20 is pressed against the guide wire, it is suppressed that the pin portion 20 is too thin and bends. Also, it can be suppressed that the pin portion 20 is too thick and the adhesion area with the guide wire becomes large, making it difficult to impart a fine shape.

[0019] The curvature radius of the chamfered R surface at both ends of the pin portion 20 is R0.03 mm to R0.13 mm. Thereby, when inserting the pin portion 20 into the shaft portion 30 during the manufacture of the guide wire shaping assist tool 10, it is possible to suppress the pin portion 20 from being inserted obliquely with respect to the long axis of the shaft portion 20. Furthermore, when shaping the guide wire, the guide wire shaping assist tool 10 can suppress damage to the guide wire and the operator's finger.

[0020] The total length L in the long axis direction of the pin portion 20 is 21.3 mm to 26.7 mm, the length L1 in the long axis direction of the connecting portion 21 is 6.3 mm to 6.7 mm, and the length in the long axis direction of the protruding portion 22 is 15 mm to 20 mm. The ratio (L1 / L) of the length L1 in the long axis direction of the connecting portion 21 to the total length L in the long axis direction of the pin portion 20 is preferably 1 / 5 or more and 1 / 3 or less, and more preferably 1 / 4 or more and 31 / 100 or less. Thereby, the guide wire shaping assist tool 10 can sufficiently secure the adhesion area between the shaft portion 30 and the pin portion 20, and thus can suppress peeling of the adhesion portion 50 between the shaft portion 30 and the pin portion 20. Furthermore, the guide wire shaping assist tool 10 can sufficiently secure the length of the pin portion 20 pressed against the guide wire, and thus can improve the workability of shaping the guide wire. Also, since the length of the pin portion 20 protruding from the shaft portion 30 of the guide wire shaping assist tool 10 is not too long, it is possible to impart a fine shape, and it is easy for the operator to apply the force applied to the shaft portion 30 to the pin portion 20.

[0021] The shaft portion 30 includes a tip and a base end, has a long axis extending from the tip to the base end, and is a hollow member in which a through hole 31 is formed from the tip to the base end. The shaft portion 30 has, on the outer peripheral surface, in order from the base end to the tip, a gripping portion 32 for the operator to grip, a shaft-side engaging portion 33 with which the cap portion 60 can engage, a constant outer diameter portion 36, and a tip tapered portion 37 that tapers and reduces the diameter toward the tip.

[0022] The gripping portion 32 is positioned at the base end of the shaft portion 30. The outer shape of the gripping portion 32 in a cross-section perpendicular to its long axis is preferably a polygon with four or more sides, and in this embodiment it is a hexagon. The parts of the gripping portion 32 corresponding to the corners of the polygon are preferably rounded or chamfered to prevent the operator's fingers from being rubbed. Because the outer shape of the gripping portion 32 in a cross-section perpendicular to its long axis is polygonal, the direction of the force received from the gripping fingers on each face of the polygon is not dispersed but concentrated, resulting in a high static friction force, making it easier to apply force to the guide wire during shaping and improving the workability of shaping the guide wire. In addition, because the guide wire shaping aid 10 is polygonal, it can be prevented from rolling when placed on the workbench, and contact with unclean areas can be prevented. Note that the outer shape of the gripping portion 32 is not limited to a polygon.

[0023] The shaft-side engaging portion 33 is positioned on the tip side of the gripping portion 32. The shaft-side engaging portion 33 has a shaft-side engaging surface 34 with a constant outer diameter along its long axis, and a shaft-side stepped portion 35 where the outer diameter decreases in a stepped manner at the tip side of the shaft-side engaging surface 34. The shaft-side engaging surface 34 is the surface that engages with the cap-side engaging surface 64 (see Figure 4), which is part of the inner circumferential surface of the cap portion 60. The shaft-side stepped portion 35 is a portion that can abut against the cap-side stepped portion 65 (see Figure 4) formed on the inner circumferential surface of the cap portion 60. When the cap-side stepped portion 65 abuts against the shaft-side stepped portion 35, the shaft portion 30 and the cap portion 60 are securely engaged.

[0024] The constant outer diameter portion 36 is located on the tip side of the shaft-side stepped portion 35 and has a smaller outer diameter than the shaft-side engaging surface 34. The constant outer diameter portion 36 has a constant outer diameter along the long axis direction of the shaft portion 30.

[0025] The tapered tip portion 37 is positioned between the tip of the constant outer diameter portion 36 and the tip of the shaft portion 30, and has an outer diameter that gradually decreases in a tapered shape towards the tip.

[0026] It is preferable that the edges (corners) at the ends of each part of the shaft portion 30 be chamfered with R-chamfers or C-chamfers.

[0027] As shown in Figures 2 and 3, the shaft portion 30 has, in order from the base end to the tip, a first inner tapered portion 40, a second inner tapered portion 41, a restricting portion 42 that restricts the position of the pin portion 20, a joining portion 43 that is joined to the pin portion 20 via an adhesive portion 50, an enlarged diameter portion 48 with an inner diameter that gradually increases toward the tip, and an opening 49 formed with a constant inner diameter from the enlarged diameter portion 48 toward the tip.

[0028] The first inner tapered portion 40 is located inside the gripping portion 32 and has an inner diameter that tapers towards the tip.

[0029] The second inner tapered portion 41 is located on the inside from the shaft-side engaging portion 33 toward the tip to partway up the tip tapered portion 37, and has an inner diameter that tapers in a tapered manner toward the tip of the first inner tapered portion 40. The taper angle of the second inner tapered portion 41 is greater than the taper angle of the first inner tapered portion 40.

[0030] The restricting portion 42 is the area where the base end face of the pin portion 20, which is inserted through the opening 49 during manufacturing, abuts. The inner diameter of the restricting portion 42 matches the inner diameter of the tip of the second inner tapered portion 41. The inner diameter of the restricting portion 42 is smaller than the outer diameter of the pin portion 20. This prevents the pin portion 20 from passing through the inside of the restricting portion 42.

[0031] The joint 43 is bonded to the outer circumferential surface of the base end of the pin portion 20 by an adhesive portion 50, which is formed by hardened adhesive. The joint 43 has a first joint 44 on the base end side and a second joint 45 positioned on the tip side of the first joint 44. The first joint 44 is positioned on the tip side of the regulating portion 42 and has a constant inner diameter that is larger than the regulating portion 42 along the long axis direction of the shaft portion 30. The first joint 44 is inserted so that the pin portion 20 is in close contact with it, so the inner diameter of the first joint 44 is slightly larger than the outer diameter of the pin portion 20. The first joint 44 is bonded to the outer circumferential surface of the pin portion 20 from the base end to a predetermined position on the tip side by the adhesive portion 50.

[0032] The second joint 45 has a constant inner diameter section 46 having a larger inner diameter than the first joint 44 along the long axis of the shaft section 30, and two recesses 47 whose inner diameters are partially larger than those of the constant inner diameter section 46. The two recesses 47 are spaced apart in the long axis direction, and each recess 47 is formed as a groove on the inner circumferential surface of the second joint 45, extending 360 degrees in the circumferential direction. The two recesses 47 are arranged to divide the constant inner diameter section 46 of the second joint 45 into approximately equal parts in the long axis direction. Note that the recesses 47 do not necessarily have to divide the constant inner diameter section 46 into approximately equal parts. The depth of the recesses 47 is 0.05 mm to 0.15 mm. In a cross-section including the long axis of the shaft section 30, the radius of curvature of the recesses 47 is R0.50 mm. Note that there may be one or three or more recesses 47. Furthermore, the shape of the recesses 47 of the second joint 45 is not particularly limited. The recesses 47 may be formed in a range of less than 360 degrees in the circumferential direction. Furthermore, each of the multiple recesses 47 may have a different shape.

[0033] In the shaft portion 30, the inner diameter of the second joint portion 45 is larger than the inner diameter of the first joint portion 44. Compared to the case where both the second joint portion 45 and the first joint portion 44 have the same inner diameter, it becomes easier to release the molding mandrel inserted into the second joint portion 45 and the first joint portion 44 when molding the shaft portion 30 in a mold. Also, in the shaft portion 30, the inner diameter of the second joint portion 45 is larger than the inner diameter of the first joint portion 44. When bonding the pin portion 20 to the shaft portion 30, it becomes easier to reach the first joint portion 44 on the base end side of the second joint portion 45 with adhesive.

[0034] The clearance between the inner diameter of the first joint 44 and the outer diameter of the pin portion 20 is preferably 0.04 mm or less. This results in a gap of approximately 0.02 mm or less between the inner circumferential surface of the first joint 44 and the outer circumferential surface of the pin portion 20. When the adhesive hardens, a thicker adhesive portion 50 exhibits improved tensile strength but decreased shear strength, while a thinner adhesive portion exhibits improved shear strength but decreased tensile strength. Therefore, the adhesive portion 50 bonding the first joint 44 and the pin portion 20 has high shear strength by being approximately 0.02 mm or less in thickness. Furthermore, the adhesive portion 50 bonding the second joint 45 and the pin portion 20 has high tensile strength because it is thicker than the adhesive portion 50 between the first joint 44 and the pin portion 20. Thus, by having both the first joint 44 and the second joint 45 in the joint 43, the adhesive portion 50 can achieve overall high shear strength and high tensile strength. Furthermore, since the second joint 45 has a recess 47, the adhesive portion 50 that fits into the recess 47 can exert an anchoring effect, thereby increasing the shear strength. Therefore, the adhesive portion 50 can achieve overall even higher shear strength and higher tensile strength. As a result, the guide wire shaping aid 10 can effectively prevent the adhesive portion between the shaft portion 30 and the pin portion 20 from peeling off during the guide wire shaping work, thereby improving the workability of the guide wire shaping.

[0035] The enlarged diameter section 48 has an inner diameter that gradually increases in a tapered manner from the tip of the second joint section 45 toward the tip side. The enlarged diameter section 48 can efficiently deliver the uncured adhesive supplied from the opening 49 to the second joint section 45 and the first joint section 44 during the manufacturing of the guide wire shaping aid 10.

[0036] The opening 49 is formed with a constant inner diameter from the tip of the second joint 45 toward the tip side. The opening 49 is supplied with uncured adhesive during the manufacturing of the guide wire shaping aid 10. Note that the inner diameter of the opening 49 does not have to be constant.

[0037] The overall length of the shaft portion 30 in the longitudinal direction is 95 mm to 115 mm. This allows the surgeon to grasp the shaft portion 30 with one hand using all five fingers, and makes it easy to hold the tapered tip portion 37 with the thumb and index finger, thus making it easier to apply force to the guide wire and improving the workability of shaping the guide wire.

[0038] The maximum outer diameter of the gripping portion 32 of the shaft portion 30 is 8mm to 10mm. This makes it easier for the surgeon to grip the shaft portion 30 and apply force to the guide wire.

[0039] The shaft portion 30 is preferably designed not to deform during use, and a hard resin material such as polyacetal is preferably used.

[0040] As shown in Figure 3, the adhesive portion 50 adheres a predetermined range of the base end of the pin portion 20 to the first joint portion 44 and the second joint portion 45 of the shaft portion 30. The adhesive portion 50 is formed by the curing of an adhesive, which is a thermosetting resin. Since the adhesive portion 50 is a thermosetting resin, it hardens only when heated above a predetermined temperature. Therefore, during manufacturing, the guide wire shaping aid 10 can be manufactured by accurately positioning the pin portion 20 in the desired position relative to the shaft portion 30, and then heating and curing the adhesive. Thus, the guide wire shaping aid 10 can ensure uniform adhesion of the adhesive portion 50 in each finished product.

[0041] The adhesive portion 50 is preferably made of a thermosetting resin, and for example, epoxy resin is preferably used.

[0042] During the manufacturing of the guide wire shaping aid 10, the adhesive supplied from the opening 49 passes through the enlarged diameter section 48 and reaches the second joint section 45. Since the inner diameter of the second joint section 45 is larger than the inner diameter of the first joint section 44, the adhesive flowing in from the tip side is not prevented from passing through the second joint section 45 and reaching the first joint section 44. Therefore, the adhesive can easily reach the first joint section 44 through the second joint section 45. The adhesive that reaches the first joint section 44 may reach the inside of the restricting section 42. The restricting section 42 communicates with the second inner tapered section 41 and the first inner tapered section 40, which have larger inner diameters than the restricting section 42. Furthermore, the first inner tapered section 40 opens to the outside at the base end of the shaft section 30. Therefore, as the adhesive supplied from the opening 49 at the tip of the shaft portion 30 into the through hole 31 flows toward the base end, the air inside the shaft portion 30 flows toward the base end. As a result, the adhesive supplied from the opening 49 into the through hole 31 can reach the first joint portion 44 or the restricting portion 42 reliably by capillary action without being obstructed by the air inside the shaft portion 30. Furthermore, since the inner diameter of the through hole 31 is larger toward the base end than the restricting portion 42, capillary action does not act, and the adhesive does not easily flow toward the base end beyond the restricting portion 42. As a result, the guide wire shaping aid 10 can form the adhesive portion 50 only in the appropriate range by supplying the adhesive only to the desired range.

[0043] As shown in Figures 1 and 4, the cap portion 60 is a detachable component attached to the tip of the shaft portion 30 to protect the pin portion 20. The cap portion 60 also prevents damage to the packaging material during transport by the pin portion 20 and prevents the pin portion 20 from piercing the operator during procedure preparation.

[0044] The cap portion 60 is a cylindrical member with a cap opening 61 at its base end and a closed tip, and can receive the pin portion 20 and the shaft portion 30 through the cap opening 61. The cap portion 60 also has a cap gripping portion 62 for facilitating gripping by the operator and a cap-side engaging portion 63 that can engage with the shaft-side engaging portion 33 of the shaft portion 30. The cap gripping portion 62 has a plurality of groove-shaped outer peripheral grooves 67 arranged in the circumferential direction on the outer peripheral surface of the cap portion 60. The cap-side engaging portion 63 has a cap-side engaging surface 64 which is part of the inner peripheral surface of the cap opening 61 and a cap-side stepped portion 65 whose outer diameter increases in a stepped manner at the tip side of the cap-side engaging surface 64. The cap-side engaging surface 64 is the surface that the shaft-side engaging surface 34 engages with. The cap-side engaging surface 64 has a plurality of groove portions 66 that extend along the long axis. As a result, the inner diameter of the cap-side engaging surface 64 can be changed within a certain range, so that the cap-side engaging surface 64 can engage with the shaft-side engaging surface 34 while also being able to disengage from it. The cap-side stepped portion 65 is the part that abuts against the shaft-side stepped portion 35 when the cap-side engaging portion 63 is engaged with the shaft-side engaging portion 33. When the cap-side stepped portion 65 abuts against the shaft-side stepped portion 35, the shaft portion 30 and the cap portion 60 are securely engaged.

[0045] The cap portion 60 is preferably made of a resin material such as polypropylene.

[0046] Next, the method of using the guide wire shaping aid 10 according to this embodiment will be described.

[0047] When the surgeon uses the guidewire shaping aid 10, they first grasp the gripping portion 32 of the shaft portion 30 with one hand and the cap gripping portion 62 of the cap portion 60 with the other hand to remove the cap portion 60 from the shaft portion 30. This causes the cap-side engaging portion 63 to disengage from the shaft-side engaging portion 33, exposing the pin portion 20, which was protected by the cap portion 60, to the outside. Note that the surgeon does not necessarily have to grip the gripping portion 32 and the cap gripping portion 62.

[0048] Next, the surgeon places the tip of the guidewire, held in the other hand, between the fingers of the hand gripping the shaft portion 32 and the pin portion 20, and presses the pin portion 20 against the tip of the guidewire. This allows the surgeon to create a starting point for bending the tip of the guidewire and bend it into any desired shape. Note that the method of pressing the pin portion 20 against the tip of the guidewire is not limited to this method, and it is not necessary to place the guidewire between the pin portion 20 and the fingers.

[0049] As described above, the guide wire shaping aid 10 according to this embodiment is a guide wire shaping aid 10 used for shaping the tip of a guide wire, and is a hollow member having a long pin portion 20 and a tip and a base end, with a through hole 31 formed from the tip to the base end, and has a shaft portion 30 into which the pin portion 20 is inserted from the tip side into the through hole 31, and an adhesive portion 50 that adheres the pin portion 20 and the shaft portion 30, and the through hole 31 has a joint portion 43 to which the pin portion 20 is adhered via the adhesive portion 50 on the tip side, and the joint portion 43 has at least one recess 47.

[0050] As described above, the guide wire shaping aid 10 has a joint 43 provided in the through hole 31. Therefore, when supplying adhesive to form the adhesive portion 50 into the gap between the shaft portion 30 and the pin portion 20, air present in the through hole 31 can escape from the base end of the shaft portion 30, allowing the adhesive portion 50 to be properly formed within the desired range. Furthermore, since the joint 43 has a recess 47, the adhesive portion 50 that bonds the joint 43 and the pin portion 20 enters the recess 47, thereby achieving high shear strength through an anchoring effect. Consequently, the guide wire shaping aid 10 can suppress the peeling of the adhesive portion 50 that bonds the pin portion 20 and the shaft portion 30 during guide wire shaping work, thereby improving the workability of guide wire shaping.

[0051] The joint 43 has a first joint 44 and a second joint 45 positioned on the tip side of the first joint 44 and having an inner diameter larger than the inner diameter of the first joint 44. The outer diameter of the portion of the pin portion 20 that is bonded to the first joint 44 and the outer diameter of the portion that is bonded to the second joint 45 are the same, and the recess 47 is positioned in the second joint 45. Since the clearance between the first joint 44 and the pin portion 20 is smaller than the clearance between the second joint 45 and the pin portion 20, the bonded portion 50 between the first joint 44 and the pin portion 20 has high shear strength, and the bonded portion 50 between the second joint 45 and the pin portion 20 has high tensile strength. Furthermore, the bonded portion 50 between the second joint 45 and the pin portion 20 exhibits an anchoring effect by fitting into the recess 47 of the second joint 45, thus improving the shear force. Therefore, by combining the first joint 44 and the second joint 45, the adhesive joint 50 can achieve high shear strength and high tensile strength overall. As a result, the guide wire shaping aid 10 can effectively suppress the peeling of the adhesive joint 50 between the pin portion 20 and the shaft portion 30 during the guide wire shaping work, thereby improving the workability of guide wire shaping.

[0052] The recess 47 is formed in a groove shape on the inner circumferential surface of the second joint 45, extending 360 degrees in the circumferential direction. As a result, the adhesive portion 50 that provides the anchoring effect is distributed throughout the entire circumferential direction of the second joint 45, thereby enabling high shear strength. Therefore, the guide wire shaping aid 10 can more effectively suppress the peeling of the adhesive portion 50, and the workability of shaping the guide wire can be further improved.

[0053] The gap between the first joint 44 and the pin portion 20 is 0.02 mm or less. This allows the guide wire shaping aid to exhibit high shear strength at the adhesive portion 50. As a result, the guide wire shaping aid 10 can effectively suppress the delamination of the adhesive portion 50 between the pin portion 20 and the shaft portion 30, thereby further improving the workability of shaping the guide wire.

[0054] The through-hole 31 has an enlarged diameter section 48 located towards the tip of the joint 43, with an inner diameter that gradually increases toward the tip. This allows the enlarged diameter section 48 to efficiently deliver the uncured adhesive supplied from the tip of the through-hole 31 to the joint 43 during the manufacturing of the guide wire shaping aid 10. As a result, the bonded portion 50 is properly formed to the desired extent.

[0055] The ratio (L1 / L) of the length L1 of the connecting portion 21 located inside the through hole 31 of the pin portion 20 in the longitudinal direction to the total length L of the pin portion 20 in the longitudinal direction is between 1 / 5 and 1 / 3. This allows the guide wire shaping aid 10 to ensure that the adhesive length of the pin portion 20 is sufficiently longer than the length of the protruding portion 22 that protrudes from the shaft portion 30 and receives external force. As a result, the guide wire shaping aid 10 can effectively suppress the peeling of the adhesive portion 50 between the pin portion 20 and the shaft portion 30, thereby improving the workability of shaping the guide wire.

[0056] It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be made by those skilled in the art within the technical framework of the present invention. For example, the shape of the pin may be hollow as long as it does not bend easily, and it does not have to be cylindrical. Also, the cap portion 60 may not be provided. [Explanation of Symbols]

[0057] 10 Guide wire shaping aid 20 Pin section 22 Protrusion 30 Shaft section 31 Through hole 32 Gripping part 33 Shaft-side engagement portion 43 Joint 44 1st joint 45 Second joint 47 Recess 48 Expanded diameter part 50 Adhesive part Overall length of the L-pin section in the longitudinal direction L1 Length of the connecting section in the longitudinal direction

Claims

1. A guide wire shaping aid used for shaping the tip of a guide wire, The long pin section, A hollow member having a tip and a base, with a through hole formed from the tip to the base, and a shaft portion into which the pin portion is inserted from the tip side into the through hole, It has an adhesive portion that bonds the pin portion and the shaft portion, The through hole has a joint on the tip side to which the pin portion is bonded via the adhesive portion, The joint portion has at least one recess, The joint comprises a first joint and a second joint positioned on the tip side of the first joint and having a minimum inner diameter larger than the minimum inner diameter of the first joint. The outer diameter of the portion of the pin that is bonded to the first joint and the outer diameter of the portion that is bonded to the second joint are the same. The aforementioned recess is a guide wire shaping aid positioned at the second joint.

2. A guide wire shaping aid used for shaping the tip of a guide wire, The long pin section, A hollow member having a tip and a base, with a through hole formed from the tip to the base, and a shaft portion into which the pin portion is inserted from the tip side into the through hole, It has an adhesive portion that bonds the pin portion and the shaft portion, The through hole has a joint portion to which the pin portion is bonded via the adhesive portion on the tip side, and a tapered portion located on the base end side of the joint portion and having an inner diameter that widens in a tapered manner toward the base end. The aforementioned joint portion is a guide wire shaping aid having at least one recess.

3. The guide wire shaping aid according to claim 1 or 2, wherein the adhesive portion closes the through hole on the base end side of the pin portion.

4. The guide wire shaping aid according to claim 1, wherein the recess is formed in a groove shape on the inner circumferential surface of the second joint portion over a 360-degree angle in the circumferential direction.

5. The guide wire shaping aid according to claim 1 or 4, wherein the gap between the inner circumferential surface of the first joint and the outer circumferential surface of the pin is 0.02 mm or less.

6. The guide wire shaping aid according to any one of claims 1 to 5, wherein the through hole has an enlarged diameter portion on the tip side of the joint portion, having an inner diameter that gradually increases toward the tip side.

7. The guide wire shaping aid according to any one of claims 1 to 6, wherein the ratio of the length in the longitudinal direction of the connecting portion disposed inside the through hole of the pin portion to the total length in the longitudinal direction of the pin portion is 1 / 5 or more and 1 / 3 or less.

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