Balloon catheter

Abstract

The invention discloses a balloon catheter which comprises a far-end inner pipe (1), a far-end outer pipe (2), a balloon (3), a joint (5) and a head end, wherein the head end is arranged at the tail end of the far-end inner pipe (1) and at least a part of the head end is a far-end swell (4); the far-end swell (4) is a bulge structure, the outer diameter of which at the swell part is greater than the diameter of the other part of the head end. The balloon catheter provided by the invention is provided with the head end with the far-end swell (4) and the bulge height of the maximum bulge position of the head end is greater than the distance between the inner edge of a bracket and the inner wall of the blood vessel, so that the head end can smoothly cross a bracket beam when entering a bracket mesh to encounter the bracket beam and the passing ability of the balloon catheter is not influenced by the bracket mesh or the bracket beam.

Description

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AI Technical Summary

Problems solved by technology

However, for the post-dilation balloon catheter, since it is mainly used for post-expansion of the stent placed in the blood vessel, so that the stent can be fully opened, close to the inner surface of the blood vessel, and its passing path is basically not narrow. At present, the post-dilation balloon The tip of the balloon catheter is designed to be conical in line with the pre-dilated balloon catheter, such as Figure 1-B shown, for Figure 1-A In the partial enlarged view of part X in t

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