ＳＳ处理困难，且疗效差，术后易复发，常须多次手术及长期辅助扩张置管。过去的扩张管不易固位，取除难，易生肉芽。理想的扩张物应易在内窥镜下置取、固位好，不引起炎症反应和肉芽长入，取除后仍能保持气道通畅。作者报道试用Ｎｉ－Ｔｉ记忆合金螺旋圈，根据术前患者颈ＣＴ SS treatment difficulties, and poor efficacy, easy to relapse after surgery, often repeated surgery and long-term support for expansion of catheterization. In the past expansion tube is not easy to retake, remove the difficult, prone granulation. The ideal dilatation should be easy to take under the endoscope, good retention, does not cause inflammation and granulation grow into, after removal can still maintain airway patency. The authors reported trial Ni-Ti memory alloy spiral coil, based on preoperative CT of the neck