咽鼓管功能不良（ＥＴＤ）会导致鼓膜内陷、中耳负压、积液、感染、松弛部形成囊袋、胆脂瘤、鼓膜穿孔、传导性聋等，其病因除常见的鼻咽肿块、腺样体肥大或水肿、鼻窦炎、先天发育畸形（如腭裂、伸舌痴呆）外，有时很难以确定。分泌性中耳炎患儿行鼓膜切开、放置压力管（ＰＥ Eustachian tube dysfunction (ETD) can cause tympanic membrane invaginations, negative pressure in the middle ear, effusion, infection, loose parts forming capsular bag, cholesteatoma, tympanic membrane perforation, conductive deafness, the cause in addition to the common nasopharyngeal mass , Adenoid hypertrophy or edema, sinusitis, congenital malformations (such as cleft palate, tongue extension dementia), sometimes difficult to determine. Children with secretory otitis media tympanic incision, placed pressure tube (PE