Hot Melt Release Coil System

Abstract

The invention relates to the technical field of medical devices, in particular to a heat-melt release coil system, which includes a coil and a conveying steel wire. Equal-diameter springs, return electrodes and medical polymer fibers, the rear end of the unequal-diameter springs is fixedly connected to the marking ring, the rear end of the conveying steel wire is fixedly sleeved with a return electrode, and two enamelled wool wires are provided on the side, one The front end of the enamelled wool wire is fixedly connected to the front end of the unequal diameter spring, the rear end is fixedly connected to the return electrode, the front end of the other enameled wool wire is fixedly connected to the rear end of the unequal diameter spring, and the rear end is fixedly connected to the conveying wire One end of the molecular fiber passes through the unequal spring and is fixedly connected to the marking ring, and the other end is fixedly connected to the spring coil located in front of the unequal spring, and is in point contact with the arc line of the unequal spring. The structure has the advantages of novel structure, fast fusing speed, short operation time, reliable coil positioning, and less pain for patients.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a thermally melted release coil system. Background technique [0002] At present, clinically, for patients with aneurysms, the insertion of coils into the aneurysm is usually used for packing treatment. Because the coils used for embolization to treat aneurysms must realize the controllable release of the implanted part, such as the GDC360° coil of Boston Scientific The NXT coils of Ev3 and Ev3 are all electrolytic release coils. Since this electrolytic release coil uses electric welding technology to link the coil and the delivery catheter, during the filling process, the delivery catheter and the positioning balloon are introduced at the same time, and the delivery catheter It is set in the aneurysm, and during the delivery of the coil, the positioning balloon is inflated in the parent blood vessel adjacent to the opening of the aneurysm. During the delivery of the ...

AI Technical Summary

Problems solved by technology

[0002] At present, clinically, for patients with aneurysms, the insertion of coils into the aneurysm is usually used for packing treatment. Because the coils used for embolization to treat aneurysms must realize the controllable release of the implanted part, such as the GDC360° coil of Boston Scientific The NXT coils of Ev3 and Ev3 are all electrolytic release coils. Since this electrolytic release coil uses electric welding technology to link the coil and the delivery catheter, during the filling process, the delivery catheter and the positioning balloon are introduced at the same time, and the delivery catheter It is set in the aneurysm, and during the delivery of the coil, the positioning balloon is inflated in the parent blood vessel adjacent to the opening of the aneurysm. During the delivery of the coil, the positioning balloon is kept inflated until the configuration of the coil is fixed. Then the gas in the positioning balloon is discharged and the microcatheter is removed at the same time. The disadvantage is: after the spring coil is released, because the coil and the guide wire are welded together by electric welding, after the electric welding cools down, the welded part does not It will be very uniform, and sometimes the uneven welding will produce relatively high voltage electrolytic activities, magnetic tiles, and the current quoted in the welding will inevitably cause irregular electrolytic conditions. The use of electric welding technology causes the coil to be electrolyzed from the microcatheter The detachment time is not easy to control, the electrolysis time ranges from 30 seconds to more than ten minutes, the separation time is long, and the electrolysis time is unstable, resulting in the unfixed coil, which in turn affects the formation of thrombus in the hemangioma

Images