岡山大耳鼻科教室における鼓室成形術の統計と術後聴力―昭和38‐47年の間の手術に関して―

(1) Tympanoplasties were done on 956 ears (789 persons) in our clinic for the past 10 years. (2) 684 operated ears of ages 10 to 29 were 72% in age distribution. (3) In 956 operated ears, the primary operations were 633 and the reoperations were 323. The rate of success of the hearing gain after surgery was 48.7% in the primary operation and was 44.4% in the reoperation. (4) In the primary operation, the conservative type (Wullstein Ⅰ and Ⅱ types) was done on 60.5% and its rate of success of hearing gain after surgery was 61.9%. The rate of success of hearing gain after surgery was 29.5% of the radical type group (Wullstein Ⅲ and Ⅳ types, and modified types). (5) In the reoperation, the conservative type group was done on 29.1%, and its rate of success of hearing gain was 73.0%. The rate of success of hearing gain was 31.3% of the radical type group. (6) As the materials forming the tympanic membrane in the primary operation, the meatal skin flaps were used on 41.3%, the temporal fascia grafts were 35.1%, the thigh skin grafts were 12.8%, the double grafting were 9.8%. The rate of success of hearing gain after surgery was from 55.3% to 48.4% in the temporal fascia graft, meatal skin flap and double grafting, and was 28.0% in the thigh skin graft. In the reoperation, the meatal skin flaps were used on 52.3%, the thigh skin grafts were 17.3%, the double grafting were 15.1%, the temporal fascia graft were 14.6%. The rate of success of hearing gain after surgery was 81.3% in the double grafting, 68.4% in the temporal fascia graft, 32.8% in the meatel skin graft, 28.6% in the thigh skin graft. (7) As the materials of columella of the modified Ⅲ and Ⅳ types in the primary operation, the ossicles were used on 76.3%, the tragal cartilage were on 14.4%. The rate of success of hearing gain after surgery was 41.7% in the tragal cartilage, 27.1% in the ossicles. In the reoperation, the ossicles were used on 36.3%, the tragal caltilage were 40.8%. The rate of success of hearing gain after suergery was 46.2% in ossicles, 42.9% in the tragal cartilage. (8) The closed method was done on 44.7% in the primary operation and 8.4% in the reoperation. On the postoperative situation, the closed method were superior to the open method. (9) The operation technique was described, which was considered to be the most preferable at preset in our clinic.