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Balloon catheter and method of manufacturing the same

A balloon catheter and manufacturing method technology, applied to balloon catheters, catheters, stents, etc., can solve the problems of difficulty in reducing diameter, difficulty in obtaining re-passability, etc., so as to reduce insertion resistance, improve degree of freedom, and achieve high re-passage. sexual effect

Inactive Publication Date: 2006-05-31
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

), or a structure with multiple wings protruding, and it is difficult to reduce the diameter
Therefore, it is difficult to obtain the desired repassability (recross: repassability) in the conventional balloon catheter.

Method used

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  • Balloon catheter and method of manufacturing the same
  • Balloon catheter and method of manufacturing the same
  • Balloon catheter and method of manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A tubular parison (inner diameter: 0.43 mm, outer diameter: 0.89 mm) was prepared by extrusion molding using a polyamide elastomer (trade name: PEBAX7233SA01; manufactured by elfatochem). Next, the parison can be formed with Image 6 The shown airbag molding die for the groove part produced an airbag having a straight pipe part with an outer diameter of 3.0 mm by a biaxial stretch blow molding method. The grooves are formed from the distal end of the distal airbag narrowing portion toward the proximal side, the number of which is 4, the width is 200 μm, the height is 100 μm, and θ is 60 degrees.

[0050] As the distal side tube at the base of the shaft, a polyamide elastomer (trade name: PEBAX7233SA01; manufactured by elfatochem) guide wire tube (inner diameter 0.42 mm, outer diameter 0.56 mm) and expansion tube (inner diameter 0.71 mm) were produced by extrusion molding. , outer diameter 0.88mm). A monorail balloon catheter with a coaxial structure was fabricated usin...

Embodiment 2

[0052] Such as Figure 8 As shown, the helical groove is produced by the same method as in Example 1, except that an airbag blow molding mold formed from the distal end of the distal side airbag narrowing part to the middle part of the distal side airbag narrowing part is used. Balloon catheter. In this embodiment, the number of grooves is four, the width is 200 μm, the height is 100 or less, and θ is 60 degrees.

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Abstract

A medical balloon catheter in which grooves and / or protrusions are formed on the balloon in a helical shape with respect to the long axis of the balloon. With such a structure, even after expansion, for example, when inserting into or removing through a high-stenosis lesion with a smaller diameter than the balloon's contracted shape, it is easy to be further coiled, thereby reducing insertion resistance.

Description

technical field [0001] The present invention relates to a balloon catheter used in percutaneous angioplasty (PTA: Percutaneous Transluminal Angioplasty, PTCA: Percutaneous Transluminal Coronary Angioplasty, etc.) for dilating narrowed or occluded parts such as coronary arteries, extremity arteries, renal arteries, and peripheral blood vessels , the balloon and the method for making the balloon catheter. Background technique [0002] Balloon catheters for PTA or PTCA therapy have a balloon at the distal end of the shaft and are mostly made of soft resin. [0003] When performing treatment in PTCA, the guide catheter is first inserted from the femoral artery, and the front end is positioned at the entrance of the coronary artery through the aorta. The catheter is inserted so that the balloon is aligned with the lesion, and a contrast agent or the like is supplied to the balloon to expand the balloon. After dilatation treatment of the lesion, the balloon is decompressed and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/958A61M25/00
CPCA61M25/10A61M25/1029A61M25/1038A61M2025/1031A61M2025/1086
Inventor 山口洋一兴梠光治
Owner KANEKA CORP