抄録
Sixty-two tympanoplasties were performed in the first one year after the opening of the Kitasato University Hospital. The postoperative hearing of 52 ears of them were measured repeatedly over 3 months after the operation. The hearing acuity of 65% of them came almost steady in about one month after the operation and that of the other was apt to fluctuate until 6 months. There was correlation between pre- and postoperative hearing, and its coefficient was 0.64**. The fact suggests further possiblities of some improvements in surgical technique. Bone-conducion hearing reduces more frequently in the cases with preoperative bone-conduction hearing loss in comparison with the cases without it. The columella technique did not bring so good result as we expected.
