Chronic otitis media with cholesteatoma with canal fistula and bone conduction threshold after tympanoplasty with mastoidectomy.
Otol Neurotol
; 35(6): 981-8, 2014 Jul.
Article
em En
| MEDLINE
| ID: mdl-24936778
ABSTRACT
OBJECTIVE:
To understand the third mobile window effect of chronic otitis media with cholesteatoma with inner ear fistula on the bone conduction threshold, we examined changes in the bone conduction audiogram after tympanoplasty with mastoidectomy for chronic otitis media with cholesteatoma with canal fistula. STUDYDESIGN:
Retrospective case review.SETTING:
Tertiary referral center. PATIENTS According to the intraoperative classification of Dornhoffer and Milewski, we focused especially on Type IIa (anatomic bony fistula with no perilymph leak). We checked the bone conduction threshold at least 3 times just before, just after, and 6 months after surgery in 20 ears with Type IIa lateral semicircular canal fistula. INTERVENTION Tympanoplasty with mastoidectomy. MAIN OUTCOMEMEASURE:
Bone conduction thresholds before and after tympanoplasty with mastoidectomy.RESULTS:
Compared with the preoperative bone conduction threshold, 6 cases were better, 12 cases were unchanged, and 2 cases were worse within the first postoperative week. Finally, 1 case was better, 15 cases were unchanged, and 4 cases were worse at the sixth postoperative month. Patients with a better bone conduction threshold in the low-tone frequencies immediately after surgery had a tendency to show no preoperative fistula symptoms. Postoperative spontaneous nystagmus had a tendency to be observed in patients with a worse bone conduction threshold in the high-tone frequencies.CONCLUSION:
The better bone conduction threshold at low-tone frequencies immediately after tympanoplasty with mastoidectomy and no preoperative fistula symptoms might imply the third mobile window theory. The worse bone conduction threshold in high-tone frequencies with spontaneous nystagmus after surgery might indicate inner ear damage.
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Assunto principal:
Otite Média
/
Timpanoplastia
/
Condução Óssea
/
Colesteatoma
/
Fístula
/
Processo Mastoide
Tipo de estudo:
Etiology_studies
/
Observational_studies
/
Risk_factors_studies
Limite:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Otol Neurotol
Assunto da revista:
NEUROLOGIA
/
OTORRINOLARINGOLOGIA
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Japão