Description

The polymer thread swells when exposed to water, which effectively increases the embolization density, immediately achieves a compact embolization effect, and effectively reduces the long-term recurrence rate. The expansion of the polymer wire can effectively increase the stability of the ring body and avoid the compression of the packed spring coil under the impact of blood flow, thereby ensuring long-term effective sealing of the tumor neck, eliminating “dog ear signs”, and effectively reducing the recurrence rate. The metal occupancy rate of the expansion ring of the same length is lower, the ring body is softer, and the effectiveness and safety during use are improved.