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长期以来咽鼓管功能不良一直被认为是鼓室成形禁忌症,但对此现在有不同看法。1952年乙烯基(Vinyl)塑料管首先应用于慢性非化脓性中耳炎之治疗,1966年Buckingham指出鼓膜导管在慢性粘连性中耳炎与“不张耳”(atelectatic ear)治疗中之优点,氏还报导1例“不张耳”胆脂瘤之形成、手术与采用通气管后之治愈经过。作者认为:咽鼓管功能不良使中耳形成持久性负压,鼓膜松弛部或有局限性萎缩之紧张部由于负压而陷入中耳并形成“袋状”,鼓膜“内陷袋”可演变为胆脂瘤。慢性耳疾常在不知不觉中进展,有潜在破坏性,缺乏一定症状,一般就医
Eustachian tube dysfunction has long been considered a contraindication to tympanoplasty, but for now there are different opinions. Vinyl plastic tubing was first applied to the treatment of chronic non-suppurative otitis media in 1952. Buckingham pointed out the advantages of a tympanic membrane catheter in the treatment of chronic adhesive otitis media and atelectatic ear in 1966. She also reported that 1 Cases of “non-Zhang Er” cholesteatoma formation, surgery and after the adoption of the ventilation tube after the cure. The authors argue that dysfunction of the eustachian tube creates a permanent negative pressure in the middle ear, that the tympanic membrane relaxes or the localized atrophic portion plunges into the middle ear due to negative pressure and forms a “bag”, and the “invagination bag” of the tympanic membrane can evolve Cholesteatoma. Chronic ear diseases often unknowingly progress, potentially destructive, lack of certain symptoms, the general medical treatment