Detachable spring coil

Abstract

The invention provides a detachable spring coil which includes a guide-in sheath, a pushing system and a spring coil assembly. The pushing system is located in the guide-in sheath and includes clamps.By optimizing the shape and number of the clamps and arranging a protrusion part at the proximal end of a spring coil body, the spring coil body is more tightly and firmly through the clamp fixing cooperation in normal times, so that the detachable spring coil can stably deliver the spring coil body to the position, needing thrombus occlusion, in a human body, then the spring coil body can be easily detached, instant detaching can be achieved during detaching, the operating method is simple and convenient, and damage to blood vessels is avoided; a mechanical detaching system is high in controllability and good in development on an embolization spring coil before detaching, and instant detaching can be achieved; and compared with a lock-catch-type detaching method, the detachable spring coil can enable the spring coil body to be easier to be pushed, damage to the spring coil body is avoided, and when the spring coil body is pushed out of a catheter, the catheter is not damaged when a push rod is retracted.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a detachable spring coil. Background technique [0002] Coils are medical devices used to treat aneurysms. During treatment, the coils are sent into the aneurysm. After reaching the lesion, the aneurysm is filled with the coil to prevent blood from entering the artery. Intratumor, to achieve the purpose of preventing aneurysm rupture. [0003] In the interventional operation of coil embolization of aneurysms, it is necessary to deliver coils of different sizes and different three-dimensional or two-dimensional shapes into the aneurysm from large to small until the springs in the aneurysm can densely pack the entire aneurysm. Clinically, interventional surgery for each aneurysm usually requires several to a dozen coils to complete the dense packing of the aneurysm. On the basis of using the catheter to establish the channel, the filling of each coil needs to go throu...

AI Technical Summary

Problems solved by technology

Due to its poor controllability, hydrolytic release coils are rarely used clinically; most of the electrolytic release coils used in clinical practice have the problem that the release time is too long or the release time is unstable, which affects the operation time; the mechanical release coils Simple snap-on design, although the spring coil can be released instantly, it reduces the controllability of the spring coil during the filling process, especially when the spring coil is pushed out of the channel, it is difficult to pull back or push

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