[Response changes of inner ear observed after middle ear surgery].
BACKGROUND
Relationship beetwen middle ear surgery and function of the inner ear is known. This problem is often discussed in determination of hearing improvement after otosurgery.


OBJECTIVE
Usefulness of the click evoked otoacoustic emissions (CEOAE) in evaluation of the inner ear function and effectiveness of tympanoplasties is discussed.


METHODS
Prospective analysis of 70 individuals operated on middle ear problems was performed. Patients were divided into four groups of otosurgeries: stapedoplasty, myringoplasty, type II tympanoplasty, type III tympanoplasty. Otoacoustic emissions and pure tones audiometry were performed before middle ear surgery and 3 months after ear operation.


RESULTS
In all established groups improvement in ABG (air bone gap) was observed. Improvement of bone conduction thresholds in the ranges of 5dB was observed in individuals with otosclerosis and type I and type III tympanoplasty. Patients with type II tympanoplasty developed no changes of bone conduction threashold after otosurgery.


CONCLUSIONS
Behind routine audiometric diagnostics otoacoustic emissions can be useful in postoperative evaluation of effectiveness of middle ear surgery (especially in patients operated on otosclerosis and in individuals with chronic otitis media with intact ossicular chain).
Katedra i Klinika Otolaryngologii CM UJ, Kierownik: Prof. dr hab. med. Jacek Składzień, Kraków, Poland. Electronic address: mwiatr@mp.pl.
Maciej
M
Wiatr
Agnieszka
A
Morawska
Sebastian
S
Kocoń
Dominik
D
Medoń
Jacek
J
Składzień
Jerzy
J
Tomik
Paweł
P
Stręk
Henryk
H
Podziorny
Robert
R
Przeklasa
D000293:Adolescent; D000328:Adult; D000368:Aged; D001301:Audiometry, Pure-Tone; D002648:Child; D002908:Chronic Disease; D007758:Ear, Inner / Q000503:physiopathology; D004432:Ear, Middle / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009225:Myringoplasty; D010033:Otitis Media / Q000175:diagnosis* / Q000601:surgery*; D013506:Otologic Surgical Procedures; D010040:Otosclerosis / Q000175:diagnosis* / Q000601:surgery*; D011300:Preoperative Care; D011446:Prospective Studies; D016896:Treatment Outcome; D014433:Tympanoplasty; D055815:Young Adult
Bone conduction thresholds; Middle ear surgery; Otoacoustic emmisions; operacje ucha środkowego; otoemisje akustyczne; przewodnictwo kostne