METHODS A catheter was inserted into the tympanum through the eustachian tube under nasal endoscope and medicine was injected through the catheter.

• 方法在鼻内镜视频系统下，经咽鼓管咽口插入鼓室腔，外侧端固定于面颊部，定期抽液，冲洗、注药，痊愈后观察10天拔管。