Vol. 101  No. June  2008

Review of the Result of Hearing after Type IV Tympanoplasty

Yoichi Matsuda, Tomoyuki Kurita, Yoshihisa Ueda, Shinsuke Ito and 
Tadashi Nakashima
(Kurume University School of Medicine)

We reviewed the postoperative hearing results in 32 ears that were underwent type IV tympanoplasty between 1995 and 2005 at Kurume University Hospital.
Hearing results were analyzed depending on the type of ossicular chain reconstruction, type of the columella, difference in canal resection and staged surgery using the guide line for hearing results following middle ear and mastoid surgery by the Otological Society of Japan (2000). The that society defined successful hearing results were as follows; The difference between air conduction and bone conduction is less than 15 dB or the postoperative hearing level is less than 30 dB or the hearing gain is more than 15 dB.
Overall success rate of surgery was 63%. The success rate of cases in which the columella was made from auricular cartilage was significantly poorer as compared to cases of autografted or artifical ossicles. The hearing outcome after staged surgery was significantly better than that after of ossicular chain reconstruction performed during the initial surgery.

Key words :tympanoplasty, columella, staged surgery

第101巻6号 目次   Vol.101 No.6 contents