Objective To explore the value of clinical features combined with 3-D reconstruction of multi-slice spiral CT in diagnosis of foreign body in trachea or bronchus in children. Methods The data of 52 children diagnosed of foreign body in trachea or bronchus were retrospectively reviewed. Both clinical features and 3-D reconstruction of multi-slice spiral CT were analyzed and summarized. Results In 52 children included ( 35 males and 17 females), 82 . 7%were under 3 years old. 30 children has repeated coughing and wheezing as the principal manifestation while 22 children presented with burst irritating and cough as primary manifestation. The main clinical signs were the asymmetry of pulmonary respiration ( 43 cases), wheeze ( 32 cases) and moist rale ( 29 cases). The positive rate of 3-D reconstruction of multi-slice spiral CT was 100%and consistent with the results of surgery. Among them, 5 cases were embedded in the trachea, 27 cases in the right bronchus, and 20 cases in the left bronchus. The main complications were emphysema ( 38 cases), bronchitis and pneumonia (32 cases), and pulmonary atelectasis (5 cases). Conclusion The combination of clinical features and 3-D reconstruction of multi-slice spiral CT can provide a reliable basis for the diagnosis of foreign body in trachea or bronchus in children.%目的：探讨临床特征联合多层螺旋CT三维重建在诊断儿童气管支气管异物中的应用价值。方法回顾2012年7月至2015年12月确诊的52例气管支气管异物患儿的资料，从临床特征和多层螺旋CT三维重建技术两方面进行分析总结。结果52例患儿中男35例、女17例，3岁以下占82.7%。临床表现中以反复咳嗽伴喘憋为主30例，以突发刺激性呛咳为主22例；主要临床体征为双肺呼吸音不对称（43例），闻及哮鸣音（32例）、湿啰音（29例）。多层螺旋CT三维重建阳性率为100%，与手术结果一致，其中5例异物嵌顿于气管内，27例嵌顿于右支气管内，20例嵌顿于左支气管内；主要合并症有肺气肿（38例）、支气管炎和肺炎（32例）、肺不张（5例）。结论临床特征与多层螺旋CT三维重建技术相结合可为诊断儿童气管支气管异物提供确实可靠的依据。
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