目的　探讨气道内镍钛合金支架治疗大气道狭窄的价值、安全性。　方法　对 42例大气道阻塞患者在透视下经纤维支气管镜引导 ,应用支架放置器将镍钛合金支架放入狭窄的大气道。　结果　所有病例均一次性放置成功 ,38例呼吸困难者均得到明显改善 ,平均肺复张时间 3.2 0± 3.6 5天 ;有 3例出现不良反应 (7.14% )。　结论　气道内镍钛合金支架治疗大气道狭窄是一种有效、安全的治疗手段 Objective To investigate the value and safety of airway nitinol stents in the treatment of airway stenosis. Methods Forty-two patients with airway obstruction under fluoroscopy guided by fiberoptic bronchoscopy were placed in a narrow airway using a stent placement device. Results All cases were successfully placed at one time, and 38 patients with dyspnea were all significantly improved. The mean time for lung repopulation was 3.2 0 ± 3.6 5 days. There were 3 cases of adverse reactions (7.14%). Conclusion Airway nitinol stent is an effective and safe treatment for airway stenosis