目的：了解因气管和支气管异物住院治疗儿童的流行特征，探讨儿童气管和支气管异物的预防措施。
Objective: To understand current status of children admitted hospital with trachea-bronchial foreign body aspiration and to explore effective intervention means.
目的：经过对150例气管、支气管异物的临床分析，了解和总结发病特点以提高诊断及治疗水平。
Objective: To elevate diagnosis and treatment level through understanding and summarizing specialty of disease from clinical analysis of 150 foreign bodies in the trachea and bronchi.
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