Vascular embolism spring ring system

Abstract

The invention provides a vascular embolism spring ring system. The system comprises a pushing rod with an inner cavity, a releasing wire, a releasing ball and an embolism spring ring connected with the releasing ball; the releasing wire and the releasing ball are arranged in the inner cavity; and a limiting notch is formed in the side wall, close to the far end, of the inner cavity of the pushing rod. The releasing ball is matched with the limiting notch under the action of the releasing wire so as to be limited in the inner cavity of the pushing rod; the releasing ball is connected with a connecting wire; a near-end connecting piece is arranged at the near end of the pushing rod; and the releasing ball is matched with the limiting notch under the action of the releasing wire to be limited in the inner cavity of the pushing rod, so that the embolism spring ring is limited, a limiting step or an end cover for limiting the releasing ball does not need to be arranged at the far-end port of the pushing rod, the problem that the releasing ball is blocked by the limiting step or the end cover and cannot be released when being released from the far-end port is solved, and the releasing ball can be conveniently, rapidly and accurately released from the pushing rod when the releasing wire is pulled out.

Description

technical field [0001] The invention relates to a blood vessel embolism coil system, in particular to a blood vessel embolism coil system. Background technique [0002] At present, there are four main methods of release of coils: water release, electrolysis, thermal release and mechanical release. Water release is to inject solvent into the delivery tube to dissolve the coil to release the coil. It has the problem of unstable release method and the injection of solvent is easy to increase the blood vessel pressure. If the amount of solvent injected is insufficient and the position of release of the coil cannot be reached, it is difficult to release; Electrolysis is that the spring coil and the guide wire are welded together by electric welding. After the welding is cooled, the welded part will be uneven, and it is easy to generate a relatively high voltage, which makes it difficult to control the time for the coil to be electrolytically dissociated from the microcatheter, a...

AI Technical Summary

Problems solved by technology

One shortcoming of this design is that the actuator needs to be used for the release operation. When releasing, the outer tube at the proximal end of the delivery system must first be inserted into the predetermined position in the actuator interface, and the release operation can only be performed after confirming that it is correct. It will make the release operation more complicated and increase the operation time; another disadvantag

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