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- Title
Risk Factors for Deterioration of Bone Conduction Hearing in Cases of Labyrinthine Fistula Caused by Middle Ear Cholesteatoma.
- Authors
Ikeda, Ryoukichi; Kobayashi, Toshimitsu; Kawase, Tetsuaki; Oshima, Takeshi; Sato, Toshinori
- Abstract
Objectives: We evaluated the risk factors and outcomes of bone conduction (BC) hearing in cases of labyrinthine fistulas treated under the basic principle of complete removal of the cholesteatoma matrix. Methods: A total of 47 patients with labyrinthine fistulas were analyzed. The fistulas were classified into smaller (no more than 3 mm) and larger fistulas (more than 3 mm). The fistulas were classified by depth into 3 stages. Preoperative symptoms and postoperative results with special reference to BC hearing were analyzed. Results: Total preoperative loss of BC hearing was found in 3 of 36 ears (9%) in the smaller-fistula group and 4 of 11 ears (36%) in the larger-fistula group; this was a statistically significant difference. The BC hearing was preserved after operation in 30 of 31 ears (97%) in the smaller-fistula group and 5 of 7 ears (71%) in the larger-fistula group; this difference was also significant. The stage (depth) of the fistula did not correlate with the postoperative BC hearing. Conclusions: In smaller labyrinthine fistulas, complete removal of the cholesteatoma matrix can be relatively safely performed. However, in patients with larger fistulas, there is a potential for a complete loss of BC hearing.
- Subjects
JAPAN; ACADEMIC medical centers; BONE conduction; CHI-squared test; CHOLESTEATOMA; FISTULA; HEARING disorders; INNER ear diseases; MIDDLE ear; RESEARCH funding; TOMOGRAPHY; RETROSPECTIVE studies; DESCRIPTIVE statistics; DISEASE complications
- Publication
Annals of Otology, Rhinology & Laryngology, 2012, Vol 121, Issue 3, p162
- ISSN
0003-4894
- Publication type
Article
- DOI
10.1177/000348941212100304