Safety stent belongs to the field of interventional surgery, which is to implant a metal stent in a narrow place to increase his blood circulation. There is no need for craniotomy, and the operation is generally completed by introducing instruments into the arteries of the limbs.
The risk of surgery belongs to the middle and advanced level, and only a few large hospitals in China do more. As far as I know, xuanwu hospital can do it, and Dr. Zhang Hongqi has done it smoothly.