Balloon catheter

A technology of balloon catheters and balloons, which is applied in the direction of balloon catheters, catheters, surgery, etc., can solve the problems that the balloon catheter cannot be pushed further, and the wire cannot be smooth, so as to reduce the possibility and improve the operability

Active Publication Date: 2016-11-09
ASAHI INTECC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the balloon catheter disclosed in Patent Document 1, the distal end and proximal end of the wire as the reinforcement are respectively fixed by the fixing tube and the proximal end shaft. Therefore, there is a problem that when the balloon catheter is inserted into a curved blood vessel, The wire as the reinforcement does not flex smoothly and properly along the bend of the vessel to push further into the balloon catheter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 As shown, for example, a balloon catheter 10 used for treating a stenosis in a blood vessel of the heart includes a balloon 20 , an outer shaft 30 , a coupling tube 40 , an inner shaft 50 , a flap 60 , and a core wire 90 as a reinforcement.

[0035] The balloon 20 has a function of expanding a narrow portion and is made of a resin member. Furthermore, it has a front end mounting part 22 on the front end side, and has a rear end mounting part 23 on the rear end side. The front end mounting portion 22 is joined to the front end of the inner shaft 50 via the sheet 60 , and the rear end mounting portion 23 is joined to the front end of the outer shaft 30 .

[0036] The outer shaft 30 has a function of supplying fluid, and is composed of a tubular member constituting an expansion lumen 36 for supplying the fluid. Further, the outer shaft 30 has a front end outer shaft portion 31 , a wire port portion 33 , an intermediate outer shaft portion 35 , and a rear...

Embodiment 2

[0053] according to Figure 4 (a) The balloon catheter 12 of the second embodiment will be described. In addition, the same structure as Example 1 is attached|subjected with the same code|symbol, and description is abbreviate|omitted.

[0054] Such as Figure 4 As shown in (a), the inner shaft 250 has a rear end side shaft portion 252 and a front end side shaft portion 251 joined to the front end of the rear end side shaft portion 252 . In addition, it is preferable that the said rear-end side shaft part 252 and the said front-end side shaft part 251 are comprised by the cylindrical body whose inner diameter and outer diameter are substantially equal to each other.

[0055] In addition, the front end side shaft portion 251 is formed of a resin that is softer than the resin forming the rear end side shaft portion 252 .

[0056] Also, the front end of the rear shaft portion 252 is inserted into the rear end of the front shaft portion 251 , and the rear end of the front shaft ...

Embodiment 3

[0061] according to Figure 4 (b) The balloon catheter 13 of the third embodiment will be described. In addition, the same code|symbol is attached|subjected to the same structure as Example 1, 2, and description is abbreviate|omitted suitably.

[0062] Such as Figure 4 As shown in (b), the inner shaft 350 has a rear end side shaft portion 352 and a front end side shaft portion 351 joined to the front end of the rear end side shaft portion 352 . In addition, it is preferable that the said rear-end side shaft part 352 and the said front-end side shaft part 351 are comprised by the cylindrical body whose inner diameter and outer diameter are substantially equal to each other.

[0063] In addition, the front end side shaft portion 351 is made of a resin that is softer than the resin forming the rear end side shaft portion 352 .

[0064] In addition, the rear end of the front end side shaft portion 351 is inserted into the front end of the rear end side shaft portion 352 , and ...

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PUM

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Abstract

Provided is a balloon catheter which can pass smoothly through the inside of a curved blood vessel, and can provide an improved kink resistance of a reinforcement member. A distal step 53 and a proximal step 57 are provided at an inner shaft 50, and a bulged portion 91 provided at the distal end of a core wire 90 is configured to be capable of moving in the axial direction between the distal step 53 and the proximal step 57. This can allow smooth passage through the inside of the curved blood vessel and improve the kink resistance of the core wire 90.

Description

technical field [0001] The present invention relates to a balloon catheter that is inserted into a stenosis or the like in a blood vessel to dilate the stenosis or the like. Background technique [0002] Conventionally, a balloon catheter for inserting into a stenosis or the like in a blood vessel to dilate the stenosis or the like has been proposed. The balloon catheter mainly includes: a balloon as an expander; an outer shaft joined to the base end of the balloon; and an inner shaft inserted into the inside of the balloon and the outer shaft. [0003] In addition, there is also known a technique in which a linear reinforcement is provided inside the outer shaft. The reinforcing body is a member that prevents the balloon catheter from being twisted in the blood vessel and improves operability when an operator such as a doctor inserts the balloon catheter into the blood vessel. [0004] For example, Patent Document 1 discloses a balloon catheter that includes a wire (reinf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/10A61M29/02
CPCA61M25/0043A61M25/10A61M25/1018A61M29/02A61M2205/04A61M2025/105A61M2025/0063A61M25/0054A61M25/0102A61M2025/0183A61M2025/1061A61M2025/1084
Inventor 濑木一辉桂田武治久保佑太
Owner ASAHI INTECC CO LTD
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