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目的：探讨经鼻内镜下泪前隐窝入路处理医源性上颌窦异物的方法及疗效。方法2012年1月至2014年6月为11例医源性上颌窦异物行鼻内镜下泪前隐窝开窗上颌窦异物取出术。结果11例上颌窦异物均一次取出，术后上颌窦自然口引流好，黏膜愈合佳。术后随访3至6个月，鼻腔、鼻窦恢复良好，无并发症发生。结论鼻内镜下泪前隐窝入路处理医源性上颌窦异物具有视野好、操作方便、损伤小、功能保护佳的优点，处理巨大异物优势更明显。“,”Objective To explore the skill and efficacy of treatment for the iatrogenic foreign body in the maxillary sinus via the endoscopic anterior prelacrimal recess approach.Methods A total of 1 1 patients with the iatrogenic for-eign body in the maxillary sinus were treated by endoscopic anterior prelacrimal recess surgery from January 2012 to June 2014.Results The foreign body was removed totally in all 1 1 patients(100%).Mucosa was well recovered and drained.During a 3-6 months follow-up,no complications happened.Conclusion Endoscopic anterior prelacrimal recess approach in treatment of iatrogenic foreign body in the maxillary sinus has advantages of good vision,convenient operation,little injury and good protection.It has unique advantage for the huge foreign body in the maxillary sinus.