Role of Impedance audiometry in diagnosing the type of otosclerotic focus and in post-operative follow-up
- 13 Downloads
This study was undertaken to evaluate the pre-operative values of static compliance, the thickness of otosclerotic focus and the utility of these parameters in post-operative follow-up of the patients.
After stapedectomy Puretone Audiometry showed hearing improvement in all the cases studied. Many of the patients had change in Tympanogram from ‘As’ to ‘A’ types which was again seen more often in patients with thick focus. The most significant post-operative change was seen in static compliance, it increased to within normal range in all the cases. This change was more evident in cases with better hearing improvement.
KeywordsStatic Compliance Otosclerosis Hearing Improvement Probe Tone Hearing Gain
Unable to display preview. Download preview PDF.
- 2.Alberti Kistensen (1970): Clinical application of Impedance Audiometry.Laryngoscope 86 : 735–740.Google Scholar
- 3.Andrew W. Morrison (1979) : Diseases of oticcapsule-otosclerosis, Scott Brown’s Diseases of Ear, Nose & Throat Vol. II,Butterworths 405–462.Google Scholar
- 4.M. R. Bicknel and N. V. Morgan (1968) : Clinical evaluation of Zwislocki bridge.Journal of Laryngology St Otology, 673.Google Scholar
- 5.Dejupesland (1969): Use of Impedance audiometer in diagnosis of middle ear pathology—Int. Audiol.Otolaryng. Clinics of North Am. 764 Oct. 1978 II).Google Scholar
- 7.Zwislocki (1961): Acoustic measurement of middle ear function.Annal of Oto-Rhino-Laryngology,70 : 599–606.Google Scholar