To wash tympanum with drum washer developed by authors after the middle ear was washed cleanlily and dry,the powder of prednisone of mildew element can be spraied into the middle ear.

• 方法 :应用自制鼓室冲洗器冲洗鼓室 ,干净后向鼓室内喷入制霉菌素强的松粉。