目的　探讨通过支气管镜下CO2冷冻术方法冻取儿童肺段支气管异物的疗效以及安全性。方法　回顾分析 自2012年10月至2016年12月收治的8例经支气管镜下CO2冷冻术方法冻取肺段支气管异物的13~54个月患儿的临床资料。 结果　8例患儿，均成功取出异物，但其中2例有局部气道黏膜损伤，引起新生肉芽阻塞小部分气道。所有患儿均未出现严 重的不良反应和并发症。结论　通过支气管镜下CO2冷冻术冻取儿童肺段支气管异物有效，操作方式简便，可作为气道异 物取出术一种补充手段。

　Objective　To assess the efficiency and safety of the bronchoscopic CO2 cryotherapy to remove bronchial foreign body in children. Methods　From Oct 2012 to Dec 2016, 8 cases diagnosed with the presence of bronchial foreign body were undergone the treatment with the bronchoscopic CO2 cryotherapy. The clinical data about the efficiency and complication were collected and retrospectively analyzed.  Results　In the 8 cases, we successfully removed the bronchial foreign bodies without complications. In 2 cases, the foreign bodies were removed successfully, but cryotherapy partially damaged the airway mucosa, causing topical airway obstruction because of the newly developed granulation tissue. No serious adverse reactions or complications were observed after the treatment. Conclusions　Removal of bronchial foreign bodies using bronchoscopic CO2 cryotherapy is an easy and effective method which can be used as a supplementary procedure for the bronchoscopic removal of foreign bodies in children’s airways.