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Ⅰ.緒言
私は耳漏と難聴を主訴とし,これまでにいろいろな手術を受けたが,治癒しない12症例に,軟骨を利用する新しい手術方法を試みた。このように耳漏と難聴を主訴とする難治症例を手術の対象とする場合,その目的は,あくまでも耳漏の停止に置くべきであつて,聴力の改善は二義的に考えるべきである。それはこれら慢性炎症耳の鼓室が,これまでの手術によつて相当高度の障害を受けているからである。したがつてその手術術式も,単に一時的な治効に終らず,再発の起こりがたい安全性の高いものにする必要がある。
私は軟骨を鼓膜材料として鼓室の形成を図るとともに,筋骨膜を用いて外耳道の後壁を作成し,中耳腔の確保を試みた。大方のご批判を得れば幸いである。
A new surgical technique of tympanoplasty is presented for the treatment of continuously discharging ear with postoperatively opened mastoid cavity. This technique aims at the reconstruction of the middle ear cleft after complete eradication of the affected parts. The prime goal is to have a dry ear, free from infection. The tympanic cavity is restored by a newly created tympanic membrane of lamellar cartilage and perichondrium. In case of absence of the superstructure of the stapes, the sound vibrations are transmitted from this new ear drum by an autogenous cartilage strut to the footplate. Fascioperiosteal pedicle flap with lower hinge is used to create the new posterior canal wall. Old mastoid cavity exposed to the ear canal and external environment is closed, but aerated from the tympanic cavity through the attic.
In twelve cases for whom this technique has been used, dry ears were obtained with conditions close to the normal contour. Hearing was not much improved three months after the surgery.
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