患者，女性，５３岁。左耳闷听下降半年余来我科就诊，检查：全身情况好，左外耳正常，鼓膜轻度内陷，活动差，中耳腔积液。电测听示左耳传导性耳聋。拟“分泌性中耳炎”行左耳鼓膜穿刺，抽出深黄色粘稠分泌物的０．１５ｍｌ，并用糜蛋白酶液（内磨蛋白酶约２００ｕ，林可霉素 Patient, female, 53 years old. Left ear bored listening to fall more than six months to our department for treatment, check: good general condition, left external ear normal, slightly tympanic membrane retraction, poor activity, middle ear effusion. Electrical test showed left ear conductive deafness. To be “secretory otitis media” left ear tympanic membrane puncture, remove the dark yellow sticky secretions of 0.15ml, and with chymotrypsin solution (internal mill protease about 200u, lincomycin