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

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a balloon catheter. Background technique [0002] Percutaneous Coronary Intervention (PCI) refers to the treatment method of dredging the narrowed or even occluded coronary artery lumen through cardiac catheterization, so as to improve the blood perfusion of the myocardium. This treatment method has the advantages of short course of treatment, less trauma, and remarkable curative effect, and has developed rapidly in recent years. According to different implementation techniques, PCI can be divided into percutaneous coronary angioplasty (PTCA), coronary stent implantation, coronary atherectomy, cutting balloon angioplasty, and intracoronary thrombus aspiration. [0003] Post-balloon dilation refers to the use of a pressure higher than the release pressure to re-expand the balloon in the stent after the stent is released, so as to ensure the complete adherence of the s...

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 the middle, it can be clearly seen that there will be a stepped tip structure between the outer surface of the catheter tip and the end section. When the balloon catheter is sent into the stent along the guide wire, the catheter tip is often due to The existence of the steps can withstand the stent beam, making it difficult for the balloon catheter to pass through. In severe cases, the stent may be deformed, causing thrombosis, and then acute myocardial infarction or even death of the patient

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