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Balloon catheter

A technology of balloon catheters and balloons, which is applied in the direction of balloon catheters, stents, dilators, etc., and can solve the problems of reduced passability, reduced flexibility of the front end piece 86, and reduced stability

Active Publication Date: 2012-11-28
GOODMAN & COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the case of the above configuration, the distal side frame region 82e of the airbag 82 is joined to the soft front end sheet 86, so the more the flexibility of the front end sheet 86 is increased, the lower the stability of supporting the airbag 82 will be.
On the other hand, when the flexibility of the front end piece 86 is reduced in order to improve the stability of the support, the passability of the narrow place is also reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] An inner layer with a thickness of 0.016 mm made of high-density polyethylene (Petrothene LR7340 from M. Holland), an intermediate layer with a thickness of 0.004 mm made of low-density polyethylene (Plexar PX3080 from Equistar Co., Ltd.), and a polyethylene A hollow tube with an inner diameter of 0.42 mm, an outer diameter of 0.58 mm, and a length of 300 mm with an outer layer of amide elastomer (Pebax 7033 from ARKEMA Co., Ltd.) having a thickness of 0.06 mm.

[0097] A range of 10 mm from one end portion of the hollow tube was extended by passing through a jig for extension formed with a circular hole having an inner diameter of 0.52 mm in a state where the inner diameter fixing mandrel was inserted inward. Then, the end on the extension side was cut to produce a large diameter region 32b having an inner diameter of 0.41 mm, an outer diameter of 0.55 mm, and a length of 290 mm, and a small diameter region 32c having an inner diameter of 0.41 mm, an outer diameter of 0...

Embodiment 2

[0101] The inner tube 16 was produced in the same manner as in Example 1, except that the length from the step portion 32a to the distal end of the inner proximal tube 32 was 10 mm.

Embodiment 3

[0103] The inner tube 16 was produced in the same manner as in Example 1, except that the length from the step portion 32a to the distal end of the inner proximal tube 32 was 12 mm.

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PUM

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Abstract

The invention relates to a balloon catheter, which enables the stability to be improved on the basis of supporting a balloon and enables the flexibility of a remote end part to be improved. The balloon catheter (10) comprises an outside pipe (15) and an inside pipe (16). The inside pipe (16) is extended to a position further than the outside pipe (15), and the balloon is arranged in a manner of covering from the outside and extended out of the region. The inside pipe (16) possesses an inside intermediate pipe (33) and an inside remote pipe (34) of which the rigidity is lower than that of the inside intermediate pipe (33). On the condition, the joint position of the inside intermediate pipe (33) and the inside remote pipe (34) exists a position further than the remote side bracket region (13e) of the balloon (13).

Description

technical field [0001] The present invention relates to a balloon catheter used for introduction into a living body, for example, when performing dilation treatment on a stenosis or a blockage of a blood vessel. Background technique [0002] Currently, balloon catheters are used in the treatment of PTA (Percutaneous Transluminal Angioplasty) or PTCA (Percutaneous Transluminal Coronary Angioplasty) and the like. The balloon catheter includes a catheter tube and a balloon fixed to the distal end side of the catheter tube. [0003] As such a balloon catheter, for example, Patent Document 1 discloses a configuration in which a flexible distal end piece is provided across a predetermined range from the distal end to the proximal side in order to improve the flexibility of the distal end side. Figure 7 An example of this configuration is shown in . [0004] like Figure 7 As shown, the balloon catheter 80 includes a catheter tube 81 and a balloon 82 . The catheter tube 81 inclu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M29/02A61M25/10A61F2/958
Inventor 杉浦寿史小柳贺亮
Owner GOODMAN & COMPANY
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