JP2018011626A - Wire with element and balloon catheter assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide wire with an element that is a device capable of adding the element to a balloon catheter, and facilitates positioning adjustment of the element, and provide a balloon catheter assembly where the wire with the element is wound in a balloon.SOLUTION: Wire 1 with an element has a long shaft 10, an element part 13 arranged in an axial intermediate position of the shaft 10 and continuously arranged with multiple ring-shaped bodies 11, and a guide part 14 having a guide wire lumen 14a provided at a distal end of the shaft 10 and capable of inserting a guide wire 3. The ring-shaped bodies 11 have sharp parts 11b, respectively, and the element part 13 can freely be wound to a balloon 21 of a balloon catheter 2 spirally.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a wire with an element provided with a plurality of elements along the axial direction and wound around a balloon of a balloon catheter, and a balloon catheter assembly in which the wire with an element is wound around a balloon.

  Treatment of vascular lesions using a catheter is widely performed because of less surgical invasion. For example, in percutaneous transluminal coronary angioplasty, a balloon catheter is used to expand the coronary lesion and improve blood flow. A balloon catheter may also be used to perform percutaneous transvascular angioplasty to treat arteriosclerosis in the femoral artery, iliac artery, popliteal artery, inferior arteries, etc. of the lower limbs. .

  As arteriosclerosis progresses, the lesion becomes calcified and a hard part is generated. In some cases, the calcified lesion cannot be pushed and expanded only by the expansion force of the balloon catheter. Also in this case, a scoring balloon catheter in which an element such as a blade is provided on a balloon is known as a device that enables treatment. The blade, which is an element of the scoring balloon catheter, is formed in a blade shape or a linear shape, and a crack is formed in the calcified portion by the blade, so that the lumen can be easily expanded.

  Devices are also known that add elements to a balloon by attaching to a normal balloon catheter. As such a device, for example, as disclosed in Patent Document 1, there is a device in which a sharp cutting member is provided in the middle of a wire. This device has a portion through which a guide wire is inserted at the tip, and the cutting member is arranged outside the balloon along the axial direction.

Japanese Patent Laid-Open No. 2004-209078

  In the scoring balloon catheter, the position of an element such as a blade in the balloon is fixed, and the positional relationship between the inner wall surface of the living body lumen and the element is determined depending on how the balloon enters the lesioned part. Depending on the state and position of the lesion in the living body lumen, it may be difficult to place the element at the position where the inner wall surface of the blood vessel should contact.

  In addition, in a device for adding an element to a balloon, even if the cutting member is arranged with reference to the deflated balloon, the position of the cutting member relative to the balloon may be shifted when the balloon is expanded. , Element positioning adjustment is difficult.

  The present invention has been made in order to solve the above-described problems, and is a device that can add an element to a balloon catheter. The element-attached wire allows easy positioning adjustment of the element, and the element-attached wire is wound around the balloon. It is an object to provide a balloon catheter assembly.

An element-equipped wire according to the present invention that achieves the above object includes an elongated shaft, an element portion in which a plurality of ring-shaped bodies arranged at an axially intermediate position of the shaft are connected, and a tip portion of the shaft. A wire with an element having a guide portion having a guide wire lumen through which a guide wire can be inserted,
Each of the ring-shaped bodies has a sharp portion, and the element portion can be spirally wound around the balloon of the balloon catheter.

  A balloon catheter assembly according to the present invention that achieves the above object has a balloon at the distal end portion of a long catheter shaft, and the element portion of the wire with an element is spirally formed along the axial direction with respect to the balloon. Wound around.

  In the wire with an element configured as described above, the element portion added to the balloon of the balloon catheter distributes a ring-shaped body having sharp portions along the circumferential direction and the axial direction of the balloon. It is easy to adjust the positional relationship with the element part, and the element part can be reliably brought into contact with the lesioned part. Moreover, since the wire with an element has the guide part which can penetrate a guide wire, the position shift of the element part accompanying expansion | swelling of a balloon can also be suppressed.

  Further, the shaft has a proximal end fixing portion fixed to the catheter shaft of the balloon catheter on the proximal side from the element portion. Thereby, fixation to the balloon of an element part is made more reliable, and the position shift of the element part accompanying expansion | swelling of a balloon can be suppressed more effectively.

  The shaft has a linear portion at an axially intermediate position, and the ring-shaped body has a hole portion through which the linear portion is inserted. Thereby, while making a ring-shaped body rotatable with respect to a shaft, it can also move also to an axial direction, and can adjust the position and direction of a ring-shaped body in a balloon.

  Moreover, the position of the said hole part in the plane direction is eccentric to the side farther from the sharp part than the gravity center position of the said ring-shaped body. Thereby, at the time of winding around the balloon, the sharp part of the ring-shaped body can easily be directed to the outside of the balloon, and the sharp part can be reliably brought into contact with the inner wall surface of the living body lumen.

  Moreover, if the said ring-shaped body is mutually connected with the adjacent ring-shaped body, even if an element part is cut | disconnected, it can prevent a ring-shaped body from isolate | separating.

  Further, if the shaft has a contrast portion at a position close to the element portion, the position of the element portion can be confirmed in the living body lumen, and the element portion is appropriately arranged with respect to the lesioned portion. Can do.

  In addition, if the guide portion has a locking projection that protrudes toward the guide wire lumen and is locked to the distal end portion of the balloon, the guide portion cannot be rotated with respect to the balloon, and the element portion Can be more reliably suppressed.

  Further, the guide wire lumen has a locking position at which the tip of the balloon is locked at an axially intermediate position, and has a friction reducing portion on the surface closer to the tip than the locking position. In addition, it is possible to improve the passage of the guide wire in the guide portion closer to the distal end side than the distal end portion of the balloon.

It is a front view of the wire with an element of this embodiment. It is a perspective view of an element part. It is a front view of a balloon catheter. It is sectional drawing of a balloon catheter. It is a perspective view of the balloon which attached the guide part. It is sectional drawing of a guide part. It is sectional drawing of the guide part which inserted the front-end | tip part of the balloon. It is sectional drawing of the guide part which has the latching protrusion of a 2nd form. It is a perspective view of the balloon which wound the element part. It is a front view of the annular body of the 2nd form. It is a front view of the annular body of a 3rd form. It is a front view (Drawing 12 (a)) of a ring-shaped object of the 4th form, and a side view (Drawing 12 (b)) of an element part which connected this ring-shaped object. It is a perspective view of the element part of a 2nd form. It is a front view of the element part of the 3rd form.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the dimension ratio of drawing is exaggerated on account of description, and may differ from an actual ratio. Further, in this specification, the side of the balloon catheter 2 that is inserted into the living body lumen of the catheter shaft 20 is referred to as “the distal end” or “the distal end side”, and the proximal side that is operated is referred to as “the proximal end” or “the proximal end side”. And

  The wire 1 with an element of this embodiment is an auxiliary that adds the function of the element 13 to the balloon catheter 2 by winding the element 13 provided at the intermediate position in the axial direction around the balloon 21 of the balloon catheter 2. It is used as a device.

  As shown in FIG. 1, the element-equipped wire 1 has a long shaft 10, and has an element portion 13 in which a plurality of ring-shaped bodies 11 are arranged at an intermediate position in the axial direction near the tip portion. Yes. A guide portion 14 having a hollow guide wire lumen 14a inside is provided at the tip of the shaft 10. The shaft 10 and the ring-shaped body 11 are formed of a metal material, and the guide portion 14 is formed of the same resin material as that of the catheter shaft 20. In particular, the shaft 10 is formed of a metal material such as Ni—Ti having superelasticity.

  At positions adjacent to both ends of the element portion 13 of the shaft 10, there are contrast portions 10 b each provided with a contrast medium. Further, a proximal end fixing portion 10 a that is capable of plastic deformation by losing the superelasticity of the metal material forming the shaft 10 is provided on the proximal end side of the element portion 13 of the shaft 10. By performing a high-temperature heat treatment on a part of the shaft 10 formed of a metal material having superelasticity, the part becomes the proximal end fixing part 10a that has lost superelasticity. Since the proximal end fixing portion 10a can be plastically deformed, it can be wound and fixed to the catheter shaft 20 of the balloon catheter 2.

  As shown in FIG. 2, the ring-shaped body 11 is formed in a thin plate shape having a substantially triangular shape when viewed from the front, and has a hole 11a at a position near the bottom of the center. The shaft 10 has a linear portion 12 having a diameter smaller than that of the shaft 10 at an intermediate portion. By setting the linear portions 12 to be inserted through the hole portions 11a of the plurality of ring-shaped bodies 11, the element portions 13 in which the ring-shaped bodies 11 are continuously provided along the axial direction are formed. Since the ring-shaped body 11 has the linear portion 12 inserted through the hole 11 a, the ring-shaped body 11 can rotate with respect to the linear portion 12 and can also move in the axial direction of the linear portion 12. For this reason, each ring-shaped body 11 can be rotated and the sharp part 11b can be turned to a desired direction. Moreover, the ring-shaped body 11 can be moved in the axial direction so that the distribution of the ring-shaped body 11 in the element portion 13 can be biased in the axial direction.

  Each ring-shaped body 11 is a sharp portion 11b having a sharp vertex. The sharp part 11b can stab the inner wall surface of the lesioned part in the living body lumen.

  Further, the hole 11 a of the ring-shaped body 11 is disposed near the bottom side of the ring-shaped body 11. The center of gravity of the ring-shaped body 11 is at the center position of the ring-shaped body 11, and the position of the hole 11a in the plane direction of the ring-shaped body 11 is eccentric from the sharp portion 11b to the side farther from the center of gravity of the ring-shaped body 11. For this reason, the sharp portion 11 b of the ring-shaped body 11 can easily face the radially outer side of the balloon 21 in a state where the element portion 13 is wound around the balloon 21. Thereby, the sharp part 11b of the ring-shaped body 11 can face the outside of the balloon 21 in the living body lumen, and can be easily stuck into the inner wall surface of the living body lumen. Further, since the sharp part 11b of the ring-shaped body 11 faces the outside of the balloon 21, it is possible to reliably prevent the balloon 21 from being damaged by the sharp part 11b hitting the outer surface of the balloon 21.

  Such an element part 13 can be formed by processing the shaft 10 by laser cutting. First, the outer shape of the ring-shaped body 11 is formed, the portion between the ring-shaped bodies 11 is cut off leaving a portion that becomes the linear portion 12, and further, the central portion of the ring-shaped body 11 is obliquely irradiated with laser to form a ring-shaped body. A hole 11a is formed by leaving a portion to be the linear portion 12 in the body 11.

  Next, the balloon catheter 2 in which the wire with element 1 is used will be described. As shown in FIG. 3, the balloon catheter 2 has a long catheter shaft 20, a balloon 21 provided at the distal end portion of the catheter shaft 20, and a hub 22 provided at the proximal end portion of the catheter shaft 20. doing. As shown in FIG. 4, the catheter shaft 20 has an outer tube 30 and an inner tube 31 that are each formed in a long hollow shape and are arranged concentrically. The inner diameter of the outer tube 30 is larger than the outer diameter of the inner tube 31, and the inner tube 31 is housed in the hollow interior of the outer tube 30. The hollow interior of the inner tube 31 forms a guide wire lumen 33 through which the guide wire 3 is inserted. Further, an expansion lumen 32 through which the expansion fluid of the balloon 21 is circulated is formed inside the hollow of the outer tube 30 and outside the inner tube 31.

The inner tube 31 protrudes further to the distal end side than the distal end of the outer tube 30, and a distal tip 31a is provided at the distal end portion. The balloon 21 has a proximal end portion fixed to the distal end portion of the outer tube 30 and a distal end portion fixed to the distal end portion of the inner tube 31. Thereby, the inside of the balloon 21 communicates with the expansion lumen 32. The balloon 21 can be expanded by injecting the expansion fluid into the balloon 21 via the expansion lumen 32. The expansion fluid may be a gas or a liquid. For example, a gas such as helium gas, CO ₂ gas, or O ₂ gas, or a liquid such as physiological saline or contrast medium can be used.

  The outer tube 30 and the inner tube 31 are preferably formed of a material having a certain degree of flexibility. Examples of such a material include polyolefins such as polyethylene, polypropylene, polybutene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer, or a mixture of two or more thereof, soft polyvinyl chloride resin, Examples thereof include fluororesins such as polyamide, polyamide elastomer, polyester, polyester elastomer, polyurethane, polytetrafluoroethylene, silicone rubber, and latex rubber.

  The balloon 21 has an axial length of 4 to 50 cm and is formed such that the diameter when expanded is larger than the inner diameter of the inserted biological lumen. Thereby, the living body lumen can be expanded by expanding the balloon 21.

  This balloon catheter 1 can be treated by expanding a lesioned part by inserting a long catheter shaft 20 into a living body lumen and expanding a balloon 21 provided at the distal end of the balloon catheter 1 at the lesioned part. It can be done. When the lesioned part is calcified or the like, and the expansion force of the balloon 21 alone cannot sufficiently expand the wound part, the element-equipped wire 1 of this embodiment is wound around the balloon 21 to form a balloon catheter assembly. To do. By using this, along with the expansion of the balloon 21 in the lesioned part, the sharpened part 11b of the ring-shaped body 11 forming the element part 13 is cracked in the calcified part to make it easier to spread the lesioned part. it can.

  Next, the attachment structure of the wire 1 with element to the balloon catheter 2 will be described. As shown in FIG. 5, the distal end portion of the wire 1 with element is fixed to the balloon catheter 2 by inserting the distal end tip 31 a serving as the distal end portion of the balloon 21 into the guide portion 14 of the wire 1 with element. The At this time, the element portion 13 of the wire with element 1 is arranged along the balloon 21 in the axial direction.

  As shown in FIG. 6, the guide portion 14 of the wire with element 1 has a guide wire lumen 14 a formed so that the inner diameter decreases from the proximal end side toward the distal end side. At the intermediate position in the axial direction of the guide wire lumen 14a, there is a locking protrusion 14c that protrudes toward the center side.

  Further, the guide wire lumen 14a has a friction reducing portion 14e on the tip side of the locking projection 14c. The friction reducing portion 14 e is formed by silicon coating the inner wall surface of the guide portion 14, and is a portion where the frictional resistance with the guide wire 3 is reduced. By the friction reduction part 14e, the passability of the guide wire 3 which penetrates the guide part 14 can be made favorable.

  As shown in FIG. 7, the distal end tip 31a, which is the distal end portion of the balloon catheter 2, is smaller than the inner diameter on the proximal end side of the guide wire lumen 14a and larger than the inner diameter on the distal end side of the guide wire lumen 14a. For this reason, the distal end tip 31a can be inserted from the proximal end side with respect to the guide portion 14, and can no longer be inserted at the locking position 14b which is the intermediate position in the axial direction of the guide wire lumen 14a. The locking protrusion 14c of the guide wire lumen 14a is formed at the locking position 14b along the axial direction of the guide wire lumen 14a, and is locked to the inserted tip 31a. Thereby, the balloon 21 is fixed in the axial direction with respect to the guide portion 14 and is also fixed so as not to rotate in the circumferential direction. The guide wire 3 inserted through the inside of the inner tube 31 is inserted through the friction reducing portion 14e of the guide portion 14 to the tip side from the guide portion 14.

  In FIG. 6, the locking projection 14c provided on a part of the guide wire lumen 14a in the circumferential direction is shown. However, as shown in FIG. 8, the locking projection 14d is provided over the entire circumference of the guide wire lumen 14a. Also good.

  As shown in FIG. 9, in the wire 1 with an element in which the tip tip 31a of the balloon 21 is fixed to the guide portion 14, the element portion 13 is spirally wound around the balloon 21, and the wire 1 with the element 1 and the balloon A balloon catheter assembly in which the catheter 2 is integrated is obtained. Thereby, the ring-shaped bodies 11 forming the element portion 13 are distributed in the circumferential direction and the axial direction of the balloon 21, respectively. The hole 11a of the ring-shaped body 11 is eccentric in the plane direction from the sharp part 11b to the side farther from the center of gravity of the ring-shaped body 11, so that the sharp part 11b of the ring-shaped body 11 is Therefore, the sharp part 11b can be reliably brought into contact with the inner wall surface of the living body lumen. In particular, when the balloon 21 around which the element portion 13 is wound is expanded, the linear portion 12 is slightly expanded, and accordingly, the direction of the ring-shaped body 11 is easily directed to the outside of the balloon 21.

  The proximal end fixing portion 10 a of the shaft 10 is wound and fixed to the catheter shaft 20 on the proximal end side from the balloon 21. As described above, the proximal end fixing portion 10 a can be plastically deformed and is fixed to the catheter shaft 20 by being wound around the catheter shaft 20. The element-equipped wire 1 is fixed to the balloon catheter 2 by the guide portion 14 at the distal end side of the element portion 13 and is fixed to the balloon catheter 2 by the proximal end fixing portion 10a at the proximal end side of the element portion 13. With these fixations, the element portion 13 can be fixed so as not to be displaced in the axial direction and the circumferential direction with respect to the balloon 21.

  The contrast portion 10 b provided at a position adjacent to both ends of the element portion 13 of the shaft 10 is disposed near both ends of the element portion 13 in a state where the element portion 13 is wound around the balloon 21. With the contrast unit 10b, both axial positions of the element unit 13 in the living body lumen can be confirmed, and the element unit 13 can be appropriately arranged with respect to the lesioned part.

  By delivering the balloon 21 wound with the element part 13 to the lesioned part and expanding the balloon 21, the sharp part 11b of the annular body 11 included in the element part 13 comes into contact with the calcified lesioned part. Can crack. Thereby, the lesioned part can be easily expanded by the balloon 21.

  The ring-shaped body constituting the element portion 13 can be in another form. As shown in FIG. 10, the ring-shaped body 15 of the second form has one arcuate shape, and has a sharp portion 15b on the other side facing the arc shape. The hole 15a is disposed closer to the arc shape in the planar direction. By forming the ring-shaped body 15 in such a shape, the side of the ring-shaped body 15 in contact with the balloon 21 becomes an arc shape, and the direction of the sharp portion 15b can be easily changed.

  Moreover, as shown in FIG. 11, the ring-shaped body 16 of the 3rd form is formed in the pentagon shape. The ring-shaped body 16 also has a hole 16a and a sharp portion 16b. Thus, the ring-shaped body 16 is not limited to a triangular shape, and may have other polygonal shapes.

  Moreover, as shown to Fig.12 (a), the ring-shaped body 17 of the 4th form has the rotation part 17c which has the hole 17a in the center part. The rotating part 17c is rotatable with respect to the ring-shaped body 17 having the sharp part 17b. The rotating portion 17c has a connecting portion 17d around the hole portion 17a. As shown in FIG. 12 (b), the connecting portion 17 d connects the adjacent ring-shaped bodies 17 in the element portion 13.

  Since the ring-shaped body 17 of the 4th form is mutually connected with the adjacent ring-shaped body 17 by the connection part 17d, even if the linear part 12 cut | disconnects, it is made to prevent each ring-shaped body 17 from isolate | separating. it can. Moreover, since the connection part 17d is provided in the rotation part 17c, even if the ring-shaped bodies 17 are connected, it can rotate with respect to the linear part 12, and directs the sharp part 17b in a suitable direction. Can do. In addition, the connection by the connection part 17d is not limited to two places like FIG. 12, One place or three places or more may be sufficient.

  The ring-shaped body of each form is arranged so that the hole is located on a side farther from the center of gravity of the ring-shaped body than the sharp part by disposing the hole at a position eccentric from the center position of the ring-shaped body. The same effect can also be obtained by disposing the part at the center of the ring-shaped body and increasing the thickness of the ring-shaped body on the sharp part side so that the center of gravity position is decentered toward the sharp part. Each ring-shaped body has one sharp part, but may have two or more sharp parts.

  Another form of the element portion will also be described. As shown in FIG. 13, the element part 40 of the second form is the same as the element part 13 of the first form in that it has a triangular ring-shaped body 11, but the element part 40 of this form is The linear portions 12 are provided so as to be continuous with no gap in the length direction. Since the ring-shaped bodies 11 are in contact with each other in this manner, it is possible to prevent the position of the ring-shaped body 11 from being biased in the length direction of the linear portion 12 in a state before the balloon 21 is expanded. Further, the ring-shaped body 11 may be provided with a lubricating coating such as silicon on the surface. By applying a lubricious coating to the surface of the ring-shaped body 11, each ring-shaped body 11 can efficiently rotate with respect to the linear portion 12.

  As shown in FIG. 14, the element portion 41 of the third embodiment is provided so that the ring-shaped body 18 that is long in the length direction of the linear portion 12 is continuous without a gap in the length direction of the linear portion 12. . Each ring-shaped body 18 is formed so that the outer diameter of both ends is small and the outer diameter of the central portion in the length direction of the linear portion 12 is increased, and the center position where the outer diameter is the largest is the sharp portion. 18a. Also in this case, since the ring-shaped bodies 18 are in contact with each other in advance, it is possible to prevent the position of the ring-shaped body 11 from being biased in the length direction of the linear portion 12. In the present embodiment, a lubricious coating such as silicon may be applied to the surface of the surface where the annular members 18 are in contact with each other. By applying a lubricious coating to the surfaces where the ring-shaped bodies 18 come into contact with each other, each ring-shaped body 18 can be efficiently rotated with respect to the linear portion 12. The sharp portion 18a is not limited to a circular cross section, and may be a polygon such as a triangle.

  As described above, the element-equipped wire 1 according to the present embodiment includes a long shaft 10, an element portion 13 in which a plurality of ring-shaped bodies 11 arranged at an axially intermediate position of the shaft 10, and a shaft. 10 having a guide portion 14 having a guide wire lumen 14a that can be inserted through the guide wire 3, and each ring-shaped body 11 has a sharp portion 11b and an element portion 13 Is spirally wound around the balloon 21 of the balloon catheter 2. Thereby, since the element part 13 added to the balloon 21 of the balloon catheter 2 distributes the annular body 11 having the sharp part 11b along the circumferential direction and the axial direction of the balloon 21, the inner wall surface of the living body lumen and the element part are distributed. It is easy to adjust the positional relationship with the element 13, and the element part 13 can be reliably brought into contact with the lesioned part. Moreover, since the wire 2 with an element has the guide part 14 which can penetrate the guide wire 3, the position shift of the element part 13 accompanying expansion | swelling of the balloon 21 can also be suppressed.

  Further, the shaft 10 has a proximal end fixing portion 10 a fixed to the catheter shaft 20 of the balloon catheter 2 on the proximal end side from the element portion 13. Thereby, fixation to the balloon 21 of the element part 13 is made more reliable, and the position shift of the element part 13 accompanying expansion | swelling of the balloon 21 can be suppressed more effectively.

  Further, the shaft 10 has a linear portion 12 at an intermediate position in the axial direction, and the ring-shaped body 11 has a hole portion 11a through which the linear portion 12 is inserted. Thereby, while making the ring-shaped body 11 rotatable with respect to the shaft 10, the position and direction of the ring-shaped body 11 in the balloon 21 can be adjusted so that it can move also in the axial direction.

  Further, in the ring-shaped body 11, the position of the hole 11a in the planar direction is eccentric to the side farther from the sharp portion 11b than the center of gravity position of the ring-shaped body 11. Thereby, at the time of winding around the balloon 21, the sharp part 11b of the ring-shaped body 11 can be easily directed to the outside of the balloon 21, and the sharp part 11b can be reliably brought into contact with the inner wall surface of the living body lumen.

  Further, if the ring-shaped body 17 is connected to the adjacent ring-shaped body 17, the ring-shaped body 17 can be prevented from being separated even if the element portion 13 is cut.

  Further, if the shaft 10 has the contrast portion 10b at a position close to the element portion 13, the position of the element portion 13 can be confirmed in the living body lumen, and the element portion 13 can be appropriately positioned with respect to the lesioned portion. Can be arranged.

  Further, if the guide portion 14 has a locking projection 14 c that protrudes toward the guide wire lumen 14 a and is locked to the tip of the balloon 21, the guide portion 14 cannot be rotated with respect to the balloon 21. And the position shift of the element part 13 can be suppressed more reliably.

  Further, the guide wire lumen 14a has a locking position 14b at which the distal end portion of the balloon 21 is locked at an intermediate position in the axial direction, and has a friction reducing portion 14e on the front surface side of the locking position. For example, it is possible to improve the passage of the guide wire 3 in the guide portion 14 closer to the distal end side than the distal end portion of the balloon 21.

  The present invention is not limited to the above-described embodiments, and various modifications can be made by those skilled in the art within the technical idea of the present invention.

DESCRIPTION OF SYMBOLS 1 Wire with an element 2 Balloon catheter 3 Guide wire 10 Shaft 10a Base end fixing | fixed part 10b Contrast part 11 Ring-shaped body 11a Hole part 11b Sharp part 12 Linear part 13 Element part 14 Guide part 14a Guide wire lumen 14b Locking position 14c Locking Projection 14e Friction reduction part 20 Catheter shaft 21 Balloon 22 Hub 30 Outer pipe 31 Inner pipe 32 Expansion lumen 33 Guide wire lumen

Claims (9)

A guide having an elongate shaft, an element portion in which a plurality of ring-shaped bodies arranged at an intermediate position in the axial direction of the shaft are connected, and a guide wire lumen that is provided at a tip portion of the shaft and into which a guide wire can be inserted A wire with an element having a portion,
Each of the ring-shaped bodies has a sharp portion, and the element-attached wire is configured such that the element portion can be spirally wound around a balloon of a balloon catheter.   The wire with an element according to claim 1, wherein the shaft has a proximal end fixing portion fixed to a catheter shaft of the balloon catheter on a proximal end side with respect to the element portion.   The wire with an element according to claim 1 or 2, wherein the shaft has a linear portion at an axially intermediate position, and the ring-shaped body has a hole portion through which the linear portion is inserted.   The wire with an element according to claim 3, wherein the position of the hole in the planar direction is eccentric to the side farther from the sharp part than the position of the center of gravity of the ring-shaped body.   The wire with an element according to any one of claims 1 to 4, wherein the ring-shaped body is connected to an adjacent ring-shaped body.   The wire with an element according to claim 1, wherein the shaft has a contrast portion at a position close to the element portion.   The wire with an element according to any one of claims 1 to 6, wherein the guide portion includes a locking protrusion that protrudes toward the guide wire lumen and is locked to a distal end portion of the balloon.   8. The guide wire lumen according to claim 1, wherein the guide wire lumen has a locking position at which the tip of the balloon is locked at an axially intermediate position, and has a friction reducing portion on a surface closer to the tip than the locking position. The wire with an element of any one of Claims.   A balloon is provided at a distal end portion of a long catheter shaft, and the element portion of the wire with an element according to any one of claims 1 to 8 is spirally wound around the balloon along the axial direction. Turned balloon catheter assembly.

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