通过对现场实际调查,普遍反映支架安全阀存在如下问题:其一是开启压力不稳定;二是安全阀动作灵敏度不够,流量较小,以致出现支架过载现象;三是弹性元件设计不合理,使安全阀超调压力过大。针对 Through the actual investigation on the spot, it generally reflects the following problems of the stent safety valve: one is the instability of the opening pressure; the other is that the safety valve has insufficient sensitivity and the flow rate is small so that the stent is overloaded; the third is that the design of the elastic element is unreasonable, Safety valve overshoot pressure is too large. against