Son-mother extending catheter and son catheter thereof

Abstract

The invention discloses a son-mother extending catheter and a son catheter thereof. The son catheter comprises a catheter body and a catheter seat, wherein an opening is formed in the end part, far away from the catheter seat, of the catheter body; side holes are formed in the side walls of the catheter body. The son catheter moves along a guide wire in a mother catheter until the son catheter stretches out of the mother catheter, at the moment, the outer wall of the son catheter is in contact with the inner wall of the blood vessel to cause the blockage of the blood vessel, when the contact part of the son catheter and the blood vessel is positioned between each side hole and the end part, far away from the catheter seat, of the catheter body, blood can flow into the catheter body from the side holes in the side walls of the catheter body, and then the blood in the catheter body can bleed from the end part, far away from the catheter seat, of the son catheter to realize the circulation of the blood, so that the condition that the blood vessel is blocked by the son catheter is avoided, the condition of causing acute ischemia is prevented, and the surgical risk is reduced.

Description

technical field [0001] The invention relates to the technical field of medical devices, and more specifically, relates to a mother-child extension catheter and a daughter catheter thereof. 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] In PCI surgery, some lesions are often encountered in tortuous, calcified or severely stenotic blood vessels. Even if the balloon is pre-dila...

AI Technical Summary

Problems solved by technology

[0007] In view of this, the first object of the present invention is to provide a sub-catheter. The structural design of the sub-catheter can effectively solve the problem that the blood flow of the blood vessel will be reduced or even blocked after the extension tube of the daughter and mother is inserted into the blood vessel. , the second object of the present invention is to provide a kind of extension catheter including the above-mentioned daughter catheter

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