Releasing mechanism capable of releasing spring ring

Abstract

The invention discloses a releasing mechanism capable of releasing a spring ring. The releasing mechanism comprises a first lock catch, a second lock catch and a fixing pin, wherein the first lock catch is provided with a first end and a second end which are oppositely arranged, the second lock catch is provided with a third end and a fourth end which are oppositely arranged, and the second end of the first lock catch is connected with the third end of the second lock catch; a first through hole is formed in the first lock catch from the first end to the second end, a second through hole is formed in the second lock catch from the third end to the fourth end, and the first through hole and the second through hole are the same in section shape; the fixing pin comprises a near section, a middle section and a far section, and the section shape of the far section of the fixing pin is matched with that of the first through hole; and the fixing pin is configured to prevent relative rotation of the first lock catch and the second lock catch when the far section of the fixing pin is inserted into the first through hole and the second through hole. The releasing mechanism is simple in structure, capable of rapidly locking and releasing the spring coil, high in reliability and good in safety.

Description

technical field [0001] The invention relates to the technical field of delivery devices for medical instruments, in particular to a release mechanism for a release spring coil. Background technique [0002] Hemangioma is a tumor-like protrusion or arteriovenous malformation in the wall of an artery or vein caused by the localized abnormal expansion of the lumen of an artery or vein. The more common one is an intracranial arteriovenous aneurysm. A coil is a medical device used to treat aneurysms. The coil is connected to a stainless steel guide wire and can be fed directly into the aneurysm. With the rapid development of embolic coil products, embolization of aneurysms is a popular treatment method. flow within. The routine process of embolizing aneurysms is to puncture the femoral artery, insert a guide catheter, then send a microcatheter into the parent artery through the guide catheter, and finally send an embolization coil into the aneurysm cavity through the microcathe...

AI Technical Summary

Problems solved by technology

This type of connection point is an active connection point, and the moving process will cause the release rod to deform or the steel ball to lock, and the steel ball may cause blood vessel rupture

Also, the long length of this type of coupling can lead to tube kicks during the final stages of the coil delivery process.

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