JP2019111083A - Guide wire - Google Patents

Abstract

To suppress plastic deformation of a core shaft associated with use and to improve the passage property of a lesion and operability, in a guide wire including a core shaft and a coil body wound on the core shaft.SOLUTION: The guide wire includes: a core shaft; a coil body wound on the core shaft; a movable part in a hollow coil shape provided at the tip end side of the core shaft; an extension part extending from the tip end side of the movable part; and a tip end joining part where the tip end of the coil body is joined with the tip end of the extension part.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a guide wire.

  There is known a guide wire used when inserting a catheter into a blood vessel, digestive organ or the like. In a guide wire made of a metal coil, generally, a core shaft using a wire and a coil wound around the outer periphery of the core shaft are provided, and the tip of the core shaft is joined to the tip of the coil. For example, Patent Documents 1 to 4 disclose a guide wire in which the diameter of the tip of the core shaft is reduced.

U.S. Pat. No. 5,345,945 JP-A-63-181774 US Patent Application Publication No. 2010/0049136 US Patent Application Publication No. 2008/020839

  However, in the case of the guide wire described in Patent Document 1, for example, when the distal end side of the guide wire is bent in a U-shape, when the guide wire is pushed to a peripheral blood vessel or a lesion, because the elasticity of the tip portion is low. There is a possibility that the bent portion of the core shaft may be plastically deformed. Moreover, in the guide wire of patent document 2, since there is no core shaft in a front-end | tip part, there existed a subject that it was inferior to lesion pathability. Furthermore, in the guide wires described in Patent Documents 3 and 4, there is a problem that the fine selection of blood vessels is not easy and the operability is inferior since the coil body wound around the core shaft is not provided.

  The present invention has been made to solve the above-mentioned problems, and in a guide wire comprising a core shaft and a coil wound around the core shaft, it suppresses plastic deformation of the core shaft accompanying use, and a lesion The purpose is to improve passage and operability.

  The present invention has been made to solve at least a part of the above-mentioned problems, and can be realized as the following modes.

(1) According to one aspect of the present invention, a guidewire is provided. The guide wire includes a core shaft, a coil wound around the core shaft, a hollow coil movable portion provided on the tip end side of the core shaft, and an extension portion extending from the tip end of the movable portion And a tip joint portion where the tip end of the coil body and the tip end of the extension portion are joined.

  According to this configuration, it is possible to impart elasticity to the distal end side of the guide wire by the hollow coil-shaped movable portion provided on the distal end side of the core shaft. Therefore, for example, even when the guide wire is pushed to the peripheral blood vessel or lesion while the distal end side of the guide wire is bent in a U-shape, the core shaft on the proximal end side with the movable portion as a fulcrum By bending the distal end side extending portion, plastic deformation of the bent portion (movable portion) can be suppressed. As a result, it is possible to suppress plastic deformation and breakage of the core shaft caused by the use of the guide wire. Moreover, according to this configuration, the guide wire is bent with the hollow coil-shaped movable portion as a fulcrum, so that the shape of the bent portion is prevented from becoming an acute angle, and the risk of blood vessel perforation conventionally caused is reduced. it can. Furthermore, according to this configuration, the lesion passing property of the guide wire can be improved by the extension portion extending from the distal end side of the movable portion to the distal end junction. Furthermore, according to this configuration, since the coil body wound around the core shaft is provided, fine selection of blood vessels is easy, and the operation performed on the core shaft (for example, pushing, pulling, rotating, etc.) Is easy to transmit to the extension. As a result of these, the operability of the guide wire can be improved.

(2) In the guide wire of the above aspect, the extension may extend in the same direction as the core shaft. According to this configuration, the operation (for example, pushing, pulling, rotating, etc.) performed on the core shaft is extended to the extending portion by the extending portion extending in the same direction as the core shaft located proximal to the movable portion. It is easier to communicate. As a result, the operability of the guide wire can be further improved.

(3) In the guide wire of the above aspect, the axis passing through the center of the movable portion may intersect with the axis of the core shaft. According to this configuration, the movable portion can be arranged such that the axis passing through the center of the hollow coil intersects the axis of the core shaft. That is, by setting the shape of the bending portion at the time of bending the guide wire to an arc shape or a U shape, it is possible to reduce the risk of blood vessel perforation that has conventionally occurred.

(34) In the guide wire of the above aspect, the axis passing through the center of the movable portion may be in the same direction as the axis of the core shaft. According to this configuration, the movable portion can be arranged such that the axis passing through the center of the hollow coil is in the same direction as the axis of the core shaft. That is, by setting the shape of the bending portion at the time of bending the guide wire to an arc shape or a U shape, it is possible to reduce the risk of blood vessel perforation that has conventionally occurred.

(5) In the guide wire of the above aspect, the movable portion and the extension portion are respectively configured as a part of the core shaft, and the movable portion winds a portion of the core shaft in a hollow coil shape. It may be formed by According to this configuration, since the movable portion and the extension portion are configured as a part of the core shaft, the number of parts when manufacturing the guide wire can be reduced.

(6) In the guide wire according to the above aspect, the movable portion and the extension portion are respectively formed by separate members from the core shaft, and the base end of the extension portion and the tip of the movable portion are first joint portions The proximal end of the movable portion and the distal end of the core shaft may be joined by a second joint. According to this configuration, the movable portion and the extension portion are constituted by separate members from the core shaft, and the extension portion and the movable portion are formed by the first joint portion, and the movable portion and the core shaft are formed by the second joint portion. It is joined respectively. For this reason, the structure provided with the core shaft and the extension part can be obtained easily.

(7) The guide wire of the above aspect further includes an inner coil body wound around the core shaft inside the coil body, and the inner coil body is disposed on the proximal end side of the movable portion. It is also good. According to this configuration, since the inner coil body is disposed on the proximal end side of the movable portion, the movement of the movable portion is not restricted by the inner coil body even in the guide wire including the inner coil body.

  The present invention can be realized in various modes, for example, a core shaft used for a guide wire, a hollow coil body attached to the tip of the core shaft, a method for manufacturing a core shaft, and a method for manufacturing a guide wire. And the like.

BRIEF DESCRIPTION OF THE DRAWINGS It is a partial cross-section schematic which shows the whole structure of the guide wire of 1st Embodiment. It is an enlarged view of the movable part vicinity. It is an enlarged view of the movable part vicinity. It is an enlarged view of the movable part vicinity. It is a figure explaining the core shaft at the time of making a guide wire bend. It is an enlarged view of the movable part vicinity in the guide wire of 2nd Embodiment. It is an enlarged view of the movable part vicinity in the guide wire of 2nd Embodiment. It is an enlarged view of the movable part vicinity in the guide wire of 3rd Embodiment. It is an enlarged view of the movable part vicinity in the guide wire of 3rd Embodiment. It is an enlarged view of the movable part vicinity in the guide wire of 4th Embodiment. It is an enlarged view of the movable part vicinity in the guide wire of 4th Embodiment. It is a fragmentary cross-sectional schematic which shows the whole structure of the guide wire of 5th Embodiment. It is a partial cross-section schematic which shows the whole structure of the guide wire of 6th Embodiment. It is a fragmentary cross-sectional schematic which shows the whole structure of the guide wire of 7th Embodiment. It is an enlarged view of the movable part vicinity in the guide wire of 7th Embodiment. It is an enlarged view of the movable part vicinity in the guide wire of 7th Embodiment. It is a figure explaining the core shaft at the time of curving a guide wire. It is a fragmentary cross-sectional schematic which shows the whole structure of the guide wire of 8th Embodiment. It is an enlarged view of the movable part vicinity in the guide wire of 8th Embodiment. It is a fragmentary cross-sectional schematic which shows the whole structure of the guide wire of 9th Embodiment. It is an enlarged view of the movable part vicinity in the guide wire of 10th Embodiment.

First Embodiment
FIG. 1 is a partial cross-sectional schematic view showing the entire configuration of a guidewire 1 according to a first embodiment. The guide wire 1 is a medical instrument used when inserting a catheter into a blood vessel or digestive organ, and the core shaft 10, the coil body 20, the inner coil body 40, the distal end joint portion 51, and the proximal end joint portion 56. , An intermediate fixing portion 61, a first fixing portion 65, and a second fixing portion 66. The guide wire 1 suppresses plastic deformation of the bent portion (movable portion 13) by bending the proximal end side core shaft 10 and the distal end side extending portion 11 with the movable portion 13 of the core shaft 10 as a fulcrum. it can.

  In FIG. 1, an axis passing through the center of the guide wire 1 is represented by an axis O (one-dot chain line), and an axis passing through the center of the movable portion 13 is represented by an axis O1 (two-dot chain line). The left side of FIG. 1 is referred to as the “distal end side” of the guide wire 1 and each component, and the right side of FIG. 1 is referred to as the “proximal side” of the guide wire 1 and each component. Also, for the guide wire 1 and each component, the end located on the distal side is referred to as "distal end" or simply "distal", and the end located on the proximal side is referred to as "proximal" or simply "proximal" I call it ". In the present embodiment, the distal side corresponds to the "distal side" and the proximal side corresponds to the "proximal side". These points are common to the drawings showing the overall configuration of FIG. 1 and thereafter.

  The core shaft 10 is a tapered elongated wire having a large diameter on the proximal side and a small diameter on the distal side. The wire forming the core shaft 10 may be, for example, a solid cylindrical shape or a hollow cylindrical shape. The core shaft 10 extends coaxially with the axis O of the guide wire 1 except for a part on the tip side. The core shaft 10 can be formed of, for example, a material such as a stainless steel alloy (SUS302, SUS304, SUS316, etc.), a superelastic alloy such as a Ni-Ti alloy, a piano wire, a nickel-chromium alloy, a cobalt alloy, or tungsten. The core shaft 10 may be formed of a known material other than the above. The core shaft 10 of the present embodiment includes, in order from the distal end side to the proximal end side, the extension portion 11, the first connection portion 12, the movable portion 13, the second connection portion 14, the small diameter portion 15, and the first taper portion 16. The first large diameter portion 17, the second tapered portion 18, and the second large diameter portion 19 are provided. The outer diameter and length of each part of the core shaft 10 can be arbitrarily determined.

  2 and 3 and FIG. 4 are enlarged views in the vicinity of the movable portion 13. In the upper part of FIG. 2, the front view of the core shaft 10 seen from the same direction as FIG. 1 is shown. The lower part of FIG. 2 shows a left side view of the core shaft 10 viewed from the direction A of FIG. The left side of FIG. 2 corresponds to the distal side (distal side) of the guide wire 1 and each component, and the right side of FIG. 2 corresponds to the proximal side (proximal side) of the guide wire 1 and each component. In FIG. 3, the front view of the core shaft 10 seen from the same direction as FIG. 1 is shown. FIG. 4 shows a top view of the core shaft 10 viewed from the direction B in FIG. These points are the same in the subsequent enlarged views.

  As shown in FIG. 1, the extension portion 11 is formed on the most tip side of the core shaft 10 (that is, on the tip side of the movable portion 13). The tip of the extension 11 corresponds to the tip 10 d of the core shaft 10, and the tip joint 51 is formed at the tip of the extension 11. As shown in FIG. 2, the extension portion 11 is each part of the core shaft 10 located closer to the base end than the movable portion 13 (that is, the second connection portion 14, the small diameter portion 15, the first taper portion 16, the first thick portion). It extends in the same direction as the diameter portion 17, the second tapered portion 18, and the second large diameter portion 19).

  Here, if the axis of the extension 11 coincides with the axis O in the same direction, in other words, if the axis of the extension 11 is coaxial with the axis O (FIG. 2), This also includes the case where the axis O 'of the portion 11 and the axis O are arranged in parallel (FIG. 3). Hereinafter, in the guide wire 1 of the present embodiment, the axis of the extension 11 shown in FIG. 2 and the axis O of the core shaft 10 are coaxial. However, as shown in FIG. 3, the axis of the extension 11 and the axis O of the core shaft 10 may be parallel. The length L1 of the extension portion 11 in the direction of the axis O can be set arbitrarily, and for example, can be a length satisfying L1> L2 + L3 + L4. As shown in FIG. 4, the extension portion 11 is a portion where the outer diameter of the core shaft 10 is the smallest, and has a constant outer diameter.

  As shown in FIG. 1, the movable portion 13 is formed on the distal end side of the core shaft 10 on the proximal end side of the extension portion 11. The movable portion 13 is formed by winding a part of the wire forming the core shaft 10 into a hollow coil shape. In other words, the movable portion 13 has a shape in which a part of the wire forming the core shaft 10 is spirally wound. The direction of winding may be right-handed or left-handed. The adjacent strands of the movable portion 13 may be in contact without a gap as illustrated, or may be wound with a gap provided.

  As shown in the upper part of FIG. 2, in the movable part 13 of the present embodiment, an axis O1 passing through the center of the movable part 13 (that is, the center of the hollow coil) intersects with the axis O of the core shaft 10. In other words, the movable portion 13 viewed from the front is line symmetrical with respect to the axis O. Here, “crossing” is not limited to that the axis O1 intersects with the axis O in a three-dimensional space, but is projected on the virtual plane when the axis O1 is projected on a virtual plane including the axis O The case where the axis O1 intersects with the axis O is also included. Hereinafter, in the guide wire 1 of the present embodiment, a configuration in which the axis O1 of the movable portion 13 and the axis O of the core shaft 10 intersect in a three-dimensional space is exemplified, but as described above, the axis O1 of the movable portion 13 and the core The axis O of the shaft 10 may intersect on the imaginary plane.

  The length L3 of the movable portion 13 in the direction of the axis O is equal to the outer diameter of the hollow coil and can be set arbitrarily. The movable portion 13 is a fulcrum when the guide wire 1 is bent (details will be described later). For this reason, it is preferable that the length L3 equal to the outer diameter of the hollow coil has a size that does not excessively prevent the deformation of the coil body 20 accompanying the bending of the guide wire 1. For example, the length L3 of the movable portion 13 can be about 70 to 80% of the inner diameter of the coil body 20. The effective number of turns m of the hollow coil of the movable portion 13 can also be set arbitrarily. The "effective number of turns m" is defined as the total number of turns minus the number of end turns at both ends. Although FIG. 2 shows an example in which the number of effective turns of the hollow coil is m = 1, the number of effective turns m may be 0 or 2 or more. The effective number of turns m = 0 means, for example, the case where the total number of turns of the hollow coil is 1 or 2, and it is composed of only end turns. Further, as shown in the lower part of FIG. 2 and FIG. 4, in the movable part 13 of this embodiment, the first turn n1 of the hollow coil is disposed on the extension of the axis O of the core shaft 10, and the second turn n2 and three turns It goes away from the axis O as it progresses to the eye n3.

  As shown in FIGS. 1 and 2, the first connection portion 12 is formed between the extension portion 11 and the movable portion 13. The first connection portion 12 curves a portion of the core shaft 10 extending from the third turn n3 of the movable portion 13 to the tip end side, and connects to the extension portion 11 extending in the same direction as the axis O. The length L5 (FIG. 4) of the first connecting portion 12 in the direction of the axis O1 and the length L2 (FIG. 2) of the first connecting portion 12 in the direction of the axis O can be set arbitrarily. The second connection portion 14 is formed between the movable portion 13 and the small diameter portion 15. The second connection portion 14 curves a portion of the core shaft 10 extending from the first turn n1 of the movable portion 13 to the base end side, and connects it to the small diameter portion 15 extending in the same direction as the axis O. The length L4 of the second connection portion 14 in the direction of the axis O can be set arbitrarily. A first fixing portion 65 is formed at the proximal end of the second connection portion 14.

  As described above, in the guide wire 1 of the present embodiment, each of the extension portion 11, the first connection portion 12, the movable portion 13 and the second connection portion 14 bends or winds the tip end side of the core shaft 10. Are formed as part of the core shaft 10. The wire diameter and the outer diameter of the core shaft 10 corresponding to each of the extension portion 11, the first connection portion 12, the movable portion 13 and the second connection portion 14 may be constant or may be different. When changing the wire diameter, for example, the wire diameter of the extension portion 11 <wire diameter of the first connection portion 12 <wire diameter of the movable portion 13 <wire diameter of the second connection portion 14 The wire diameter of the extension 11 = the wire diameter of the first connection portion 12 = the wire diameter of the second connection portion 14. In addition, the outer peripheral surface of the extension part 11, the 1st connection part 12, the movable part 13, and the 2nd connection part 14 is covered by the coil body 20 mentioned later.

  As shown in FIG. 1, the small diameter portion 15 is formed between the second connection portion 14 and the first taper portion 16 and has a constant outer diameter. The first tapered portion 16 is formed between the small diameter portion 15 and the first large diameter portion 17 and has a tapered shape in which the outer diameter is expanded from the distal end side toward the proximal end side. The first large diameter portion 17 is formed between the first tapered portion 16 and the second tapered portion 18, and has a constant outer diameter larger than the outer diameter of the small diameter portion 15. A proximal end bonding portion 56 is formed at the proximal end portion of the first large diameter portion 17. The outer peripheral surfaces of the small diameter portion 15, the first tapered portion 16, and the first large diameter portion 17 are covered with a coil body 20 described later.

  The second tapered portion 18 is formed between the first large diameter portion 17 and the second large diameter portion 19 and has a tapered shape in which the outer diameter is expanded from the distal end side toward the proximal end side. The second large diameter portion 19 is formed on the most proximal side of the core shaft 10. The base end of the second large diameter portion 19 corresponds to the base end 10 p of the core shaft 10. The second large diameter portion 19 is a portion where the outer diameter of the core shaft 10 is the largest, and has a constant outer diameter. The second tapered portion 18 and the second large diameter portion 19 are not covered by the coil body 20 and are used when the operator grips the guide wire 1.

  The coil body 20 has a shape in which the wire 21 is spirally wound around the core shaft 10. The coil body 20 according to the present embodiment includes the extension portion 11, the first connection portion 12, the movable portion 13, the second connection portion 14, the small diameter portion 15, the first tapered portion 16, and the first large diameter portion of the core shaft 10. The core shaft 10 is disposed so as to cover the outer circumferential surface 17 and is not disposed on the second tapered portion 18 and the second large diameter portion 19 of the core shaft 10. The wire 21 which forms the coil body 20 may be a single wire made of a single wire, or may be a twisted wire obtained by twisting a plurality of wires. When the wire 21 is a single wire, the coil body 20 is configured as a single coil, and when the wire 21 is a stranded wire, the coil body 20 is configured as a hollow stranded wire coil. Moreover, you may comprise the coil body 20 combining a single coil and a hollow stranded wire coil. The wire diameter of the strand 21 and the coil average diameter (the average diameter of the outer diameter and the inner diameter of the coil body 20) of the coil body 20 can be determined arbitrarily.

  The wire 21 is made of, for example, a stainless steel alloy (SUS302, SUS304, SUS316, etc.), a super elastic alloy such as Ni-Ti alloy, a piano wire, a radiation transmitting alloy such as nickel-chromium alloy, cobalt alloy, tungsten, gold, It can be formed of a radiopaque alloy such as platinum, tungsten, or an alloy containing these elements (e.g., platinum-nickel alloy). The wire 21 may be formed of a known material other than the above.

  The coil body 20 is fixed to the core shaft 10 by the distal end joint portion 51, the proximal end joint portion 56, and the intermediate fixing portion 61. The distal end bonding portion 51 is a member for bonding the distal end portion 20 d of the coil body 20 and the distal end portion 10 d of the core shaft 10 (that is, the distal end portion of the extension portion 11). The tip joint portion 51 is formed of metal solder such as silver solder, gold solder, zinc, Sn—Ag alloy, Au—Sn alloy, etc., and the coil body 20 and the core shaft 10 are fixed by this metal solder. The distal end bonding portion 51 may be formed by an adhesive such as an epoxy adhesive.

  The proximal end joint portion 56 is a member for joining the proximal end portion 20 p of the coil body 20 and the proximal end portion of the first large diameter portion 17 of the core shaft 10. The proximal joint 56 may be formed of the same material as the distal joint 51 or may be formed of a different material. The intermediate fixing portion 61 is a member for fixing the coil body 20 and the first large diameter portion 17 of the core shaft 10 in the vicinity of an intermediate portion in the direction of the axis O of the coil body 20. The intermediate fixing portion 61 can be formed of the same material as that of the distal end bonding portion 51. The material employed for the intermediate fixing portion 61 may be the same as or different from that of the distal end bonding portion 51. A plurality of fixing portions for fixing the coil body 20 and the core shaft 10 may be formed on the guide wire 1.

  The inner coil body 40 has a shape in which a strand 41 is spirally wound on the core shaft 10 inside the coil body 20. The inner coil body 40 has a length in the direction of the axis O shorter than that of the coil body 20. The inner coil body 40 of the present embodiment is disposed proximal to the movable portion 13 of the core shaft 10. In other words, the inner coil body 40 is disposed so as to cover the outer peripheral surface of the second connection portion 14, the small diameter portion 15, and a part of the distal end side of the first tapered portion 16. It is not arranged above.

  The winding direction of the strand 41 of the inner coil body 40 is opposite to that of the coil body 20. In addition, the winding direction of the strand 41 in the inner coil body 40 may be the same as that of the coil body 20, and may be a direction other than the reverse direction. The wire 41 may be a single wire or a stranded wire, similarly to the wire 21. The inner coil body 40 may be configured by combining a single coil and a hollow stranded wire coil. The wire diameter of the strand 41 and the coil average diameter of the inner coil body 40 can be arbitrarily determined. The wire 41 can be formed of the same material as the wire 21. The material employed for the strand 41 may be the same as or different from the strand 21.

  The inner coil body 40 is fixed to the core shaft 10 by the first fixing portion 65 and the second fixing portion 66. The first fixing portion 65 joins the distal end portion of the inner coil body 40 and the second connection portion 14 and the small diameter portion 15 of the core shaft 10. The first fixing portion 65 can be formed of the same material as the distal end bonding portion 51. The material employed for the first fixing portion 65 may be the same as or different from that of the distal end bonding portion 51. The second fixing portion 66 joins the proximal end portion of the inner coil body 40 and a part of the first tapered portion 16 of the core shaft 10. The second fixing portion 66 can be formed of the same material as the distal end bonding portion 51. The material employed for the second fixing portion 66 may be the same as or different from that of the distal end bonding portion 51.

  In FIG. 1, the range in which the extension portion 11, the first connection portion 12, the movable portion 13 and the second connection portion 14 of the core shaft 10 are formed is P1, and the range in which the inner coil body 40 is formed is P2. A range in which the coil body 20 is formed other than the ranges P1 and P2 is P3. The lengths of the ranges P1, P2 and P3 in the direction of the axis O can be set arbitrarily. For example, P1 = P2 <P3.

<Example of Effects of this Embodiment>
FIG. 5 is a view for explaining the core shaft 10 when the guide wire 1 is bent. According to the guide wire 1 of the first embodiment, elasticity is given to the tip end side (the range P1 in FIG. 1) of the guide wire 1 by the hollow coil movable portion 13 provided on the tip end side of the core shaft 10 Can. Therefore, for example, as shown in FIG. 5, when the guide wire 1 is pushed forward to a peripheral blood vessel or a lesion while the distal end side of the guide wire 1 is bent in a U shape (FIG. Even with the movable portion 13 as a fulcrum, the proximal end core shaft 10 (the second connection portion 14 to the second large diameter portion 19), the distal end side extension portion 11 and the first connection portion 12 By bending as shown, plastic deformation of the bent portion (movable portion 13) can be suppressed.

  In addition, the movable portion 13 is between the movable portion 13 and both ends of the movable portion 13 (the second connection portion 14 and the small diameter portion 15 on the base end side, the extension portion 11 on the distal end side and the first connection portion 12). In contrast to the hollow coil shape, there is a difference in configuration that the both ends of the movable portion 13 consist of linear strands and are different from the coil shape. Due to the difference in the configuration, a difference occurs in the rigidity of the core shaft 10 between the movable portion 13 and both ends of the movable portion 13. For this reason, in a state where the distal end side of the guide wire 1 is bent in a U-shape, the bent portion of the core shaft 10 conventionally occurs when the guide wire is pushed to the peripheral blood vessel or lesion (FIG. 5, arrow direction D) However, it is possible to suppress the occurrence of an event that displacement (expansion while moving) from the distal end side to the proximal end side to cause plastic deformation in the displacement portion. As a result of these, according to the guidewire 1 of the first embodiment, plastic deformation and breakage of the core shaft 10 accompanying the use of the guidewire 1 can be suppressed.

  Further, as illustrated, since the guide wire 1 of the first embodiment is bent with the hollow coil-shaped movable portion 13 as a fulcrum, it is possible to suppress the shape of the bent portion from becoming an acute angle. Specifically, the movable portion 13 is oriented such that the axis O1 passing through the center of the hollow coil intersects with the axis O of the core shaft 10, so that the shape of the bending portion at the time of bending the guide wire 1 is arc-shaped or U-shaped. It can be shaped like a letter. As a result, in the guide wire 1 of the first embodiment, it is possible to reduce the risk of vascular perforation that has conventionally occurred.

  Furthermore, according to the guide wire 1 of the first embodiment, the lesion passing property of the guide wire 1 can be improved by the extension portion 11 extending from the distal end side of the movable portion 13 to the distal end bonding portion 51. In addition, since the guide wire 1 includes the coil body 20 wound around the core shaft 10, fine selection of blood vessels is easy. Since the extension portion 11 extends in the same direction as the core shaft 10 (the second connection portion 14 to the second large diameter portion 19) located on the base end side of the movable portion 13, the second large diameter of the core shaft 10 The operation (for example, pushing, pulling, rotating, etc.) performed on the portion 19 is easily transmitted to the extension portion 11. Thus, in the guidewire 1 of the first embodiment, the operability of the guidewire 1 can be improved.

  Furthermore, according to the guide wire 1 of the first embodiment, since the movable portion 13 and the extension portion 11 are configured as a part of the core shaft 10, the number of parts when manufacturing the guide wire 1 can be reduced. it can. Further, by providing the inner coil body 40, displacement of the bent portion of the core shaft 10 from the distal end side to the proximal end side is further suppressed, and plastic deformation and breakage of the core shaft 10 accompanying use of the guide wire 1 can be achieved. Can be further suppressed. Since the inner coil body 40 is disposed on the proximal end side of the movable portion 13, the movement of the movable portion 13 is not restricted by the inner coil body 40 even in the guide wire 1 including the inner coil body 40.

Second Embodiment
6 and 7 are enlarged views of the vicinity of the movable portion 13A in the guide wire 1A of the second embodiment. In the second and subsequent embodiments, the description of the same configuration as the above-described embodiment will be omitted, and some of the reference numerals in the drawings may be omitted. In the guide wire 1 of the first embodiment, the effective number of turns m of the hollow coil of the movable portion 13 is set to 1. However, in the guide wire 1A of the second embodiment, the number of effective turns of the hollow coil of the movable portion 13A is m = 3. Thus, the effective number of turns m of the hollow coil of the movable portion 13A can be arbitrarily changed, and the number of turns other than the number of turns exemplified in the first embodiment and the second embodiment may be adopted. By changing the effective number of turns m, the elasticity of the tip end side (FIG. 1, range P1) of the guide wire 1A and the difference in the rigidity of the core shaft 10A between the movable portion 13A and both ends of the movable portion 13A are changed. Can.

  As shown in FIG. 7, in the guide wire 1A, the width of the movable portion 13A in the direction of the axis O1 widens as the number of effective turns m increases, and the length L51 in the direction of the axis O1 of the first connection portion 12A also increases. In this case, the coil body 20 may be formed into an elliptical cylindrical shape (in other words, the cross section of the coil body 20 viewed from the B direction in FIG. 1 is elliptical), and the outer diameter of the coil body 20 is movable 13A. May be large enough to be accommodated. On the other hand, the length L21 (FIG. 6) of the first connection portion 12A in the direction of the axis O can be set arbitrarily, and may be the same as or different from the length L2 of the first embodiment. Also by the guide wire 1A of the second embodiment, the same effect as that of the above-described first embodiment can be obtained. Moreover, in the guide wire 1A of the second embodiment, when the coil body 20 has an elliptical cylindrical shape, the bending direction of the guide wire 1A on the tip end side can be defined. Therefore, plastic deformation and breakage of the core shaft 10A accompanying the use of the guide wire 1A can be further suppressed as compared with the configuration including the cylindrical coil body 20.

Third Embodiment
8 and 9 are enlarged views of the vicinity of the movable portion 13B in the guide wire 1B of the third embodiment. In the guide wire 1 of the first embodiment, the end (first turn n1) of the hollow coil of the movable portion 13 is disposed on the extension of the axis O of the core shaft 10B. However, in the guide wire 1B of the third embodiment, the center (second turn n2) of the hollow coil of the movable portion 13B is disposed on the extension of the axis O. Therefore, the operation performed on the second large diameter portion 19 (FIG. 1) of the core shaft 10B can be more easily transmitted to the extension portion 11, and the operability of the guide wire 1B can be further improved. As described above, the position of the movable portion 13B viewed from the side surface (direction A in FIG. 1) can be arbitrarily changed, and positions other than the positions exemplified in the first embodiment and the third embodiment may be adopted.

  As shown in FIG. 9, in the guide wire 1B, the length L52 in the direction of the axis O1 of the first connection portion 12B becomes shorter as the position of the movable portion 13B changes. Similarly, as the position of the movable portion 13B changes, the length (not shown) in the direction of the axis O1 of the second connection portion 14B becomes longer. On the other hand, the length L22 of the first connection portion 12B and the length L42 (FIG. 8) of the second connection portion 14B in the direction of the axis O can be set arbitrarily, and may be the same as the lengths L2 and L4 of the first embodiment. , May be different. Also by the guide wire 1B of the third embodiment, the same effect as that of the above-described first embodiment can be obtained.

Fourth Embodiment
10 and 11 are enlarged views of the vicinity of the movable portion 13C in the guide wire 1C of the fourth embodiment. In the guide wire 1 of the first embodiment, the axis O1 passing through the center of the movable portion 13 and the axis O of the core shaft 10 intersect in a three-dimensional space. However, in the guide wire 1C of the fourth embodiment, the axis O1 passing through the center of the movable portion 13C and the axis O of the core shaft 10C do not intersect in a three-dimensional space, and the axis O1 on an imaginary plane including the axis O When projected, the axis O and the projected axis O1 intersect on the virtual plane. In other words, the movable portion 13C viewed from the front is not line symmetrical with respect to the axis O. Thus, the position of the movable portion 13C viewed from the front (the direction in FIG. 1) can be arbitrarily changed, and the axis O1 passing through the center of the movable portion 13C necessarily intersects with the axis O of the core shaft 10C in three dimensions. You do not have to.

  As shown in FIG. 11, in the guide wire 1C, the length L53 in the direction of the axis O1 of the first connection portion 12C becomes slightly shorter along with the change of the position of the movable portion 13C. On the other hand, the length L23 (FIG. 10) of the first connection portion 12C in the direction of the axis O can be set arbitrarily, and may be the same as or different from the length L2 of the first embodiment. Also by the guide wire 1C of the fourth embodiment, the same effect as that of the first embodiment described above can be obtained.

Fifth Embodiment
FIG. 12 is a schematic partial cross-sectional view showing the entire configuration of a guide wire 1D according to a fifth embodiment. In the guide wire 1 of the first embodiment, the inner coil body 40 is provided. However, in the guide wire 1D of the fifth embodiment, the inner coil body 40 and the first fixing portion 65 and the second fixing portion 66 for fixing the inner coil body 40 are not provided. Thus, the inner coil body 40 can be omitted. Also by the guide wire 1D of the fifth embodiment, the same effect as that of the above-described first embodiment can be obtained.

Sixth Embodiment
FIG. 13 is a schematic partial cross-sectional view showing the entire configuration of a guide wire 1E according to a sixth embodiment. The guide wire 1E of the sixth embodiment does not include the inner coil body 40 and the first fixing portion 65 and the second fixing portion 66 for fixing the inner coil body 40. Further, in the guide wire 1 of the first embodiment, each of the extension portion 11, the first connection portion 12, the movable portion 13, and the second connection portion 14 bends or winds the tip end side of the core shaft 10. , Was formed as part of the core shaft 10. However, in the guide wire 1E of the sixth embodiment, each of these parts is constituted by members (the extending portion 71, the first joint portion 72, the movable portion 73, the second joint portion 74) different from the core shaft 10E. Specifically, the core shaft 10E of the guide wire 1E is configured not to include the extension portion 11 to the second connection portion 14 but to include the small diameter portion 15 to the second large diameter portion 19. Therefore, in the guide wire 1E, the tip end of the small diameter portion 15 corresponds to the tip end 10d of the core shaft 10E.

  The extension portion 71 has the same configuration as the extension portion 11 of the first embodiment except that it is a separate member from the core shaft 10E. The base end 71 p of the extension portion 71 is joined to the distal end 73 d of the movable portion 73 by the first joining portion 72. That is, in the guide wire 1E, the first joint portion 72 connects the extension portion 71 and the movable portion 73 instead of the first connection portion 12. The first bonding portion 72 can be formed of the same material as the tip bonding portion 51. The material employed for the first joint 72 may be the same as or different from that of the distal joint 51. Further, the distal end portion 71 d of the extension portion 71 is joined to the distal end portion 20 d of the coil body 20 by the distal end joining portion 51.

  The movable portion 73 has the same configuration as the movable portion 13 of the first embodiment except that the movable portion 73 is a separate member from the core shaft 10E and the extension portion 71. The base end portion 73 p of the movable portion 73 is joined to the tip end portion 10 d of the core shaft 10 E by the second joining portion 74. That is, in the guide wire 1E, the second joint portion 74 connects the movable portion 73 and the small diameter portion 15 instead of the second connection portion 14. The second bonding portion 74 can be formed of the same material as the tip bonding portion 51. The material employed for the second joint 74 may be the same as or different from that of the distal joint 51. Further, as described above, the distal end portion 73 d of the movable portion 73 is joined to the proximal end portion 71 p of the extension portion 71 by the first joining portion 72.

  Also by the guide wire 1E of the sixth embodiment, the same effect as that of the first embodiment described above can be obtained. Further, in the guide wire 1E of the sixth embodiment, the movable portion 73 and the extension portion 71 are configured as separate members from the core shaft 10E, and the extension portion 71 and the movable portion 73 are formed by the first joint portion 72. The movable portion 73 and the core shaft 10E (small diameter portion 15) are respectively joined by the second joint portion 74. For this reason, the structure provided with the core shaft 10E and the extension part 71 can be obtained easily.

Seventh Embodiment
FIG. 14 is a partial cross-sectional schematic view showing an entire configuration of a guide wire 1F of a seventh embodiment. In the guide wire 1 of the first embodiment, the axis O1 passing through the center of the movable portion 13 intersects the axis O of the core shaft 10. However, in the guide wire 1F of the seventh embodiment, the axis passing through the center of the movable portion 13F (that is, the center of the hollow coil) does not intersect the axis O of the core shaft 10F and is in the same direction. In other words, the center of the movable portion 13F and the axis O do not intersect in the three-dimensional space, and do not intersect even on the virtual plane when the axis O1 is projected on the virtual plane including the axis O. Here, “in the same direction” means that the axis passing through the center of the movable portion 13F is parallel to the axis O passing through the center of the movable portion 13F, in addition to the case where the axis passing through the center of the movable portion 13F is coaxial with (coincident with) the axis O It also includes the case where it is placed in any position. Hereinafter, in the guide wire 1F according to the seventh embodiment, as shown in FIG. 14, the axial line passing through the center of the movable portion 13F and the axial line O of the core shaft 10 are coaxial. However, as described above, the axis passing through the center of the movable portion 13F may be parallel to the axis O of the core shaft 10.

  FIG.15 and FIG.16 is an enlarged view of movable part 13F vicinity in the guide wire 1F of 7th Embodiment. As shown in FIG. 15, in the guide wire 1F, the effective number of turns m = 4 of the hollow coil of the movable portion 13F. Unlike the movable portion 13 of the first embodiment, the length L36 in the direction of the axis O of the movable portion 13F may be different from the outer diameter L66 of the hollow coil of the movable portion 13F. The outer diameter L66 of the movable portion 13F can be set arbitrarily, and may be the same as or different from the length L3 of the first embodiment. The length L36 of the movable portion 13F depends on the number of effective turns m. Further, as shown in the lower part of FIG. 15, in the movable portion 13F, each of the hollow coils (first turn n1 to sixth turn n6) is disposed in a spiral around the axis O and one turn on the proximal end side It is arranged to the tip side as it proceeds from the eye n1 to the second turn n2 and the third turn n3. The sixth turn n6 is disposed at the most proximal side.

  As shown in FIG. 16, in the guide wire 1F, the length L56 of the first connection portion 12F becomes shorter as the configuration of the movable portion 13F changes. On the other hand, the length L26 (FIG. 15) of the first connection portion 12F in the direction of the axis O can be set arbitrarily, and may be the same as or different from the length L2 of the first embodiment.

  FIG. 17 is a view for explaining the core shaft 10F when the guide wire 1F is bent. Also by the guide wire 1F of the seventh embodiment, elasticity is given to the tip end side (FIG. 14, range P1) of the guide wire 1 by the hollow coil movable portion 13F provided on the tip end side of the core shaft 10F. it can. For this reason, similarly to the guide wire 1 of the first embodiment, the core shaft 10F on the proximal end side and the extension portion 11F on the distal end side and the first connection portion 12F as illustrated with the movable portion 13F as a fulcrum. By bending, plastic deformation of the bent portion (movable part 13F) can be suppressed.

  In addition, while the movable portion 13F is hollow coil shaped between the hollow coil shaped movable portion 13F and both ends of the movable portion 13F, the both ends of the movable portion 13F are made of linear strands and coil shaped There is a difference in configuration that is different from. Due to this difference in configuration, a difference occurs in the rigidity of the core shaft 10F between the movable portion 13F and both ends of the movable portion 13F. For this reason, it is possible to suppress the occurrence of a phenomenon that the bending portion of the core shaft 10F, which has conventionally occurred, is displaced (expanded while moving) from the distal end side to the proximal end side to cause plastic deformation in the displaced portion. It is possible to suppress plastic deformation and breakage of the core shaft 10F accompanying use of 1F.

  Further, as shown in FIG. 17, the guide wire 1F of the seventh embodiment is bent with the hollow coil-shaped movable portion 13F as a fulcrum, so that the shape of the bent portion can be suppressed from being an acute angle. Specifically, the movable portion 13F is directed in the same direction as the axis O of the core shaft 10F with the axis O passing through the center of the hollow coil, whereby the shape of the bent portion at the time of bending the guide wire 1F is soft It can be a circular arc or a U shape having a property. As a result, also in the guide wire 1F of the seventh embodiment, it is possible to reduce the risk of vascular perforation that has conventionally occurred.

  Furthermore, according to the guide wire 1F of the seventh embodiment, similar to the guide wire 1 of the first embodiment, the lesion passing property of the guide wire 1F can be improved by the extension portion 11, and the operability of the guide wire 1F is improved. it can. Moreover, since the movable portion 13F and the extension portion 11 are configured as a part of the core shaft 10F, the number of parts when manufacturing the guide wire 1F can be reduced. Further, since the inner coil body 40 is disposed on the proximal end side of the movable portion 13F, the movement of the movable portion 13F is not limited by the inner coil body 40.

Eighth Embodiment
FIG. 18 is a partial cross-sectional schematic view showing an entire configuration of a guide wire 1G of an eighth embodiment. In FIG. 18, for convenience of illustration, the movable portion 83 is illustrated as a cross-sectional view. The guide wire 1G of the eighth embodiment does not include the inner coil body 40 and the first fixing portion 65 and the second fixing portion 66 for fixing the inner coil body 40. Further, in the guide wire 1F of the seventh embodiment, each of the extension portion 11, the first connection portion 12F, the movable portion 13F, and the second connection portion 14 bends or winds the tip end side of the core shaft 10F. , Was formed as part of the core shaft 10F. However, in the guide wire 1G of the eighth embodiment, these parts are configured by members (the extending portion 81, the first joint portion 82, the movable portion 83, the second joint portion 84) different from the core shaft 10G. Specifically, the core shaft 10G of the guide wire 1G is configured not to include the extension portion 11 to the second connection portion 14 but to include the small diameter portion 15 to the second large diameter portion 19. Therefore, in the guide wire 1G, the tip end of the small diameter portion 15 corresponds to the tip end 10d of the core shaft 10G.

  FIG. 19 is an enlarged view of the vicinity of the movable portion 83 in the guide wire 1G of the eighth embodiment. The extending portion 81 has the same configuration as the extending portion 11 of the seventh embodiment except that it is a separate member from the core shaft 10G. The base end 81p of the extension 81 is joined to the distal end 83d of the movable section 83 (the lower half in FIG. 19, the tenth turn n10: a broken line) by the first joining section 82. That is, in the guide wire 1G, the first bonding portion 82 connects the extension portion 81 and the movable portion 83 instead of the first connection portion 12F. The first bonding portion 82 can be formed of the same material as the tip bonding portion 51. The material employed for the first joint 82 may be the same as or different from that of the distal joint 51. Further, as shown in FIG. 18, the distal end portion 81 d of the extension portion 81 is joined to the distal end portion 20 d of the coil body 20 by the distal end joint portion 51.

  The movable portion 83 has the same configuration as the movable portion 13F of the seventh embodiment except that the core shaft 10G and the extension portion 81 are separate members, and the effective number of turns m = 8. The base end 83p (the lower part of FIG. 19, the first turn n1: broken line notation) of the movable portion 83 is joined to the tip end 10d of the core shaft 10G by the second joining portion 84. That is, in the guide wire 1G, the second bonding portion 84 connects the movable portion 83 and the small diameter portion 15 instead of the second connection portion 14. The second bonding portion 84 can be formed of the same material as the tip bonding portion 51. The material employed for the second joint 84 may be the same as or different from that of the distal joint 51. Further, as described above, the distal end portion 83 d of the movable portion 83 is joined to the proximal end portion 81 p of the extension portion 81 by the first joining portion 82.

  As shown in the lower part of FIG. 19, in the guide wire 1G, the distal end portion 83d (tenth turn n10) of the movable portion 83 is joined inside the first bonding portion 82, and the base end portion 83p (first turn n1) The two junctions 84 are joined at the inside. Therefore, all the portions (the second turn n2 to the ninth turn n9) of the movable portion 83 exposed to the outside can be counted to the number of effective turns m. The length L37 of the movable portion 83 in the direction of the axis O depends on the number m of effective turns. On the other hand, the outer diameter L67 of the hollow coil of the movable portion 83, the length L17 of the extension 81 in the direction of the axis O, the length L27 of the first joint 82, and the length L47 of the second joint 84 are set arbitrarily. it can.

  Also by the guide wire 1G of the eighth embodiment, the same effect as that of the seventh embodiment described above can be obtained. Further, in the guide wire 1G of the eighth embodiment, the movable portion 83 and the extension portion 81 are configured as separate members from the core shaft 10G, and the extension portion 81 and the movable portion 83 are formed by the first joint portion 82. The movable portion 83 and the core shaft 10G (small diameter portion 15) are respectively joined by the second joint portion 84. For this reason, a configuration in which the core shaft 10G and the extension portion 81 are disposed can be easily obtained.

The Ninth Embodiment
FIG. 20 is a partial cross-sectional schematic view showing an entire configuration of a guide wire 1H of a ninth embodiment. The guide wire 1G of the eighth embodiment does not include the inner coil body 40. However, the guide wire 1H of the ninth embodiment includes the inner coil body 40 and the first fixing portion 65 and the second fixing portion 66 for fixing the inner coil body 40. Also by the guide wire 1H of the ninth embodiment, the same effect as that of the above-described eighth embodiment can be obtained.

Tenth Embodiment
FIG. 21 is an enlarged view of the vicinity of the movable portion 13 in the guide wire 1J of the tenth embodiment. In the guide wire 1 of the first embodiment, the extension portion 11 is extended in the same direction as the core shaft 10. However, in the guide wire 1J of the tenth embodiment, the extension portion 11J does not extend in the same direction as the core shaft 10J. Specifically, as shown in FIG. 21, the axis O ′ of the extension portion 11J and the axis O of the core shaft 10J are not coaxial (not coincident) and not parallel. The angle θ formed by the axis O ′ of the extension 11J and the axis O of the core shaft 10J on the imaginary plane projected onto the axis O may be determined arbitrarily. The same advantages as those of the first embodiment described above can be achieved by the guide wire 1J of the tenth embodiment.

<Modification of this embodiment>
The present invention is not limited to the above embodiment, and can be implemented in various aspects without departing from the scope of the present invention. For example, the following modifications are possible.

[Modification 1]
In the first to tenth embodiments, an example of the configuration of the guide wire 1 is shown. However, the configuration of the guide wire 1 can be variously changed. For example, the guide wire 1 may not include the second tapered portion 18 and the second large diameter portion 19 and may be entirely covered by the coil body 20 from the distal end portion 10 d to the proximal end portion 10 p of the core shaft 10. For example, the core shaft 10 may not have a tapered portion, and may have the same wire diameter throughout the entire area in the direction of the axis O (the extending portion 11 to the second large diameter portion 19).

[Modification 2]
In the said 1st-10th embodiment, an example of a structure of the coil body 20 was shown. However, the configuration of the coil body 20 can be variously modified. For example, adjacent strands 21 of the coil body 20 may be wound with a gap. For example, at least one of the outer peripheral surface and the inner peripheral surface of the coil body 20 may be coated with a resin film for the purpose of improving slipperiness, antithrombic adhesion, operability, and the like. For example, the coil body 20 is disposed so as to cover the second tapered portion 18 and the second large diameter portion 19 of the core shaft 10 in addition to the extension 11 to the first large diameter portion 17 of the core shaft 10 described above It is also good.

[Modification 3]
In the first to tenth embodiments, an example of the configuration of the extension unit 11 is shown. However, the configuration of the extension unit 11 can be variously changed. For example, the extension part 11 may not have the minimum outer diameter among the parts of the core shaft 10, and may not have a constant outer diameter. For example, the extension portion 11 may not have a cylindrical shape, and may have an elliptical cylindrical shape or a polygonal cylindrical shape.

[Modification 4]
In the first to tenth embodiments, an example of the configuration of the movable portion 13 is shown. However, the configuration of the movable portion 13 can be variously changed. For example, the angle between the axis O1 passing through the center of the movable portion 13 (the center of the hollow coil) and the axis O of the core shaft 10 can be set arbitrarily. For example, in the first embodiment, the angle between the axis O1 and the axis O is 90 degrees (vertically intersects). For example, in the seventh embodiment, the angle between the axis O1 and the axis O is 0 degrees The case where it does not cross and it is the same direction) was illustrated. Besides this, the angle between the axis O1 and the axis O may be arbitrarily changed, such as 15 degrees, 30 degrees, 45 degrees, or the like. For example, the shape of the hollow coil formed as the movable portion 13 may not be a cylindrical shape, and may be an elliptical cylindrical shape or a polygonal cylindrical shape.

[Modification 5]
In the said 6, 8, 9 embodiment, the structure in case the extending | stretching part 71 and the movable part 73 are another members with the core shaft 10 was illustrated. However, as long as the extension part 71 and the movable part 73 are separate members from the core shaft 10E, various modifications are possible. For example, the extension portion 71 and the movable portion 73 may be formed of the same member. In this case, the first bonding portion 72 is unnecessary, and for example, the first connection portion 12 of the first embodiment can be used to connect the two.

[Modification 6]
The configuration of the guide wire according to the first to tenth embodiments and the configuration of the guide wire according to the first to fifth modifications may be combined as appropriate. For example, a guide wire 1A of the second embodiment (FIG. 6), a guide wire 1B of the third embodiment (FIG. 8), a guide wire 1C of the fourth embodiment (FIG. 10), and a guide of the seventh embodiment The configuration (FIG. 12) in which the inner coil body 40 of the fifth embodiment is not provided in at least one of the wires 1F (FIG. 14) may be employed. For example, in at least one of the guide wire 1A of the second embodiment (FIG. 6) to the guide wire 1E of the sixth embodiment (FIG. 13), an axis passing through the center of the movable portion 13 as in the fourth modification. The angle between O1 and the axis O of the core shaft 10 may be changed. For example, in at least one of the guide wire 1A of the second embodiment (FIG. 6) to the guide wire 1J of the tenth embodiment (FIG. 21), as in the second modification, the outer peripheral surface and the inside of the coil body 20 At least one of the circumferential surfaces may be coated with a resin film. For example, the configuration of the extension portion 11J of the guide wire 1J (FIG. 21) of the tenth embodiment is applied to the guide wire 1A (FIG. 6) to the guide wire 1H (FIG. 20) of the second embodiment. May be

  As mentioned above, although this aspect was demonstrated based on embodiment and a modification, embodiment of the above-mentioned aspect is for making an understanding of this aspect easy, and does not limit this aspect. The present embodiment can be modified and improved without departing from the spirit and the scope of the claims, and the present embodiment includes the equivalents thereof. In addition, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

1, 1A to 1J: guide wire 10, 10A to 10J: core shaft 11, 11J: extension portion 12, 12A, 12B, 12C, 12F: first connection portion 13, 13A, 13B, 13C, 13F: movable portion 14, 14B: second connection portion 15: small diameter portion 16: first tapered portion 17: first large diameter portion 18: second tapered portion 19: second large diameter portion 20: coil body 21: wire 40: inner coil body DESCRIPTION OF SYMBOLS 41 ... Wire 51 ... Tip junction part 56 ... Base end junction part 61 ... Intermediate fixed part 65 ... 1st fixed part 66 ... 2nd fixed part 71 ... Extension part 72 ... 1st joined part 73 ... Movable part 74 ... 2nd Junction 81: Elongation 82: First junction 83: Movable 84: Second junction

Claims (7)

A guide wire,
Core shaft,
A coil body wound around the core shaft;
A hollow coil-shaped movable portion provided on the tip side of the core shaft;
An extending portion extending from a distal end side of the movable portion;
A distal end joint portion in which a distal end of the coil body and a distal end of the extension portion are joined;
Guide wire. A guidewire according to claim 1, wherein
A guidewire, wherein the extension extends in the same direction as the core shaft. A guide wire according to claim 1 or claim 2, wherein
A guide wire whose axis passing through the center of the movable part intersects the axis of the core shaft. A guide wire according to claim 1 or claim 2, wherein
A guide wire whose axis passing through the center of the movable part is in the same direction as the axis of the core shaft. A guidewire according to any one of the preceding claims, wherein
The movable portion and the extension portion are each configured as a part of the core shaft,
The guide wire, wherein the movable portion is formed by winding a part of the core shaft in a hollow coil shape. A guidewire according to any one of the preceding claims, wherein
The movable portion and the extension portion are respectively constituted by members separate from the core shaft,
The proximal end of the extension portion and the distal end of the movable portion are joined by a first joint portion,
The guide wire in which the proximal end of the movable part and the tip of the core shaft are joined by a second joint. A guidewire according to any one of the preceding claims, further comprising:
An inner coil body wound around the core shaft inside the coil body;
The guide wire, wherein the inner coil body is disposed on the proximal side of the movable portion.

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