Mother-son extension catheter and son catheter thereof

Abstract

The invention discloses a mother-son extension catheter and a son catheter thereof. The son catheter comprises a catheter body and a catheter base, wherein a hole is formed at the end, far away from the catheter base, of the catheter body; side holes are formed in the side wall of the catheter body. The son catheter moves along a guide wire in a mother catheter until the son catheter extends out of the mother catheter, and at the moment, if a blood vessel is blocked and the contact site of the son catheter and the blood vessel is located between the side holes and the end, far away from the catheter base, of the catheter body due to contact of the outer wall of the son catheter and the inner wall of the blood vessel, blood can flow into the catheter body via the side holes in the side wall of the catheter body and then the blood in the catheter body can flow out via the hole at the end, far away from the catheter base, of the son catheter, thus achieving blood circulation and then avoiding the condition that the blood vessel is blocked by the son catheter, preventing causing acute ischemia and reducing the surgical risks.

Description

[0001] This application claims the priority of the Chinese patent application submitted to the China Patent Office on May 15, 2015, the application number is 201510250853.5, and the title of the invention is "a parent-child extension catheter and its sub-catheter", the entire content of which is incorporated herein by reference. Applying. technical field [0002] 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 [0003] Percutaneous Coronary Intervention (PCI) refers to the treatment method of dredging the narrowed or even occluded coronary artery lumen through cardiac catheterization, thereby improving 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 tec...

AI Technical Summary

Problems solved by technology

[0008] 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 extension tube enters 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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