Balloon catheter with flexible connecting portion between head and balloon

A technology of a flexible connecting part and a balloon catheter, applied in the field of medical devices, can solve problems such as difficulty in passing the balloon catheter, deformation of the stent, and thrombosis.

Pending Publication Date: 2017-12-05
孙英贤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Additionally, if Figure 1~2 As shown, the tip ends of the balloon catheters in the prior art are small and conical. Although this design is beneficial for the balloon catheter to pass through the narrow lesion, or the chronic occlusive lesion where the guide wire has just been opened, but for post-dilation balloon For the balloon catheter, since it is mainly used to post-expand the stent placed in the blood vessel, so that the stent can be fully expanded and close to the inner surface of the blood vessel, if the head end of the post-dilation balloon catheter is designed to be in line with the pre-expanded balloon Uniform conical shape of the sac duct, as in figure 2 As shown, there will be a small flat end surface at the front end of the catheter tip. When the balloon catheter is sent into the stent along the guide wire, the flat end surface at the front end of the catheter tip will often withstand the stent beam, causing the balloon catheter It is difficult to pass, and severe cases may cause deformation of the stent and cause thrombus. Therefore, the structure of the head end of the balloon catheter also needs to be improved so that its passability will not be affected by the stent beam when the stent is post-expanded.

Method used

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  • Balloon catheter with flexible connecting portion between head and balloon
  • Balloon catheter with flexible connecting portion between head and balloon
  • Balloon catheter with flexible connecting portion between head and balloon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Such as image 3 As shown, this embodiment is a quick-exchange balloon catheter, and a guide wire outlet 12 is provided in the middle of the catheter.

[0068] Such as Figure 7 As shown, in this embodiment, a tapered head end 11 is adopted, and the head end 11 and the flexible connection part 4 are in a separate structure. One end of the flexible connection part 4 is sleeved on the inner tube 1, and the other end of the flexible connection part 4 is connected to the rear side of the head end 11 through a seam fit. The diameter of the flexible connection part 4 is the same as that of the balloon 3 The diameter of the connecting pipe 32 is the same, and the diameter of the flexible connecting part 4 is also the same as the maximum diameter of the outer tapered surface of the head end 11. When the balloon catheter enters a curved blood vessel, the flexible connection part 4 is likely to bend to conform to the shape of the blood vessel under the action of an external for...

Embodiment 2

[0070] Such as Figure 8 As shown, the difference between this embodiment and Embodiment 1 is that the head end 11 and the flexible connection part 4 are integrally formed. When the balloon catheter enters a curved blood vessel, the flexible connection part 4 and the head end 11 will Under the action, it is easy to produce a bend conforming to the bend of the blood vessel, so as to ensure the passage of the catheter.

Embodiment 3

[0072] Such as Figure 9 As shown, the difference between this embodiment and Embodiment 1 is that the maximum outer diameter of the outer tapered surface of the head end 11 is smaller than the diameter of the flexible connection part 4, and the connection between the flexible connection part 4 and the head end 11 One end is provided with a transition slope 41 , and the diameter of the flexible connecting portion 4 is the same as that of the connecting tube 32 of the balloon 3 .

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Abstract

The invention relates to the technical field of medical instrument and especially relates to a balloon catheter with a flexible connecting portion between a head and a balloon. The balloon catheter comprises an inner tube, an outer tube, a balloon and a head end; the inner tube is installed inside the outer tube; a guide wire passes through the inner tube; the balloon sleeves on a far-end of the inner tube; one end of the balloon is connected with the outer tube and the other end is connected with the inner tube; a flexible connecting portion is installed at a rear side of the head end; a far-end of the inner tube extends out from the balloon and is connected with the flexible connecting portion; the flexible connecting portion enters in a blood vessel and then is bent in compliance with the blood vessel. When the balloon catheter is used for after-expansion operation on supports, the balloon catheter will not be affected by the support meshes or support beams, which facilitates the after-expansion operation and reduces risk.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a balloon catheter with a flexible connection between a head end and a balloon. 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] Such as Figure 1~2 As shown, the head end of the balloon catheter currently used clinically is a short conical shape that is set at the end of t...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): A61M25/10
CPCA61M25/0021A61M25/0054A61M25/10A61F2/958
Inventor孙英贤
Owner孙英贤