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Perilymph fistula

Four year experience with a new audiometric test

Published online by Cambridge University Press:  29 June 2007

Liam M. Flood ,
J. Graham Fraser ,
Jonanthan W. P. Hazell  and
Michael P. Rothera
Liam M. Flood
Affiliation:
London Mr. L. M. Flood, F.R.C.S., The Royal Ear Hospital, Huntley Street, London, WC1E 6AU
J. Graham Fraser*
Affiliation:
London
Jonanthan W. P. Hazell
Affiliation:
London
Michael P. Rothera
Affiliation:
London
*
Mr. J. G. Fraser, F.R.C.S., The Royal Ear Hospital, Huntley Street, London, WC1E 6AU, Tel: (01) 387 9300 X430
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Abstract

The phenomenon of a position-dependent fluctuation of hearing loss, in patients subsequently found to have perilymphatic fistula, is reported. Eleven patients with rupture of the oval or round windows of the labyrinth showed a lowering of thresholds on audiometry after lying horizontally for 30 minutes with the affected ear uppermost. It is suggested that air had entered the membranous labyrinth, interfered with transmission of footplate vibration to the perilymph column, and was displaced by this manoeuvre to produce a small, measurable, hearing gain, The diagnostic and prognostic significance of this finding is discussed.

Type
Research Article
Information
The Journal of Laryngology & Otology , Volume 99 , Issue 7 , July 1985 , pp. 671 - 676
Copyright
Copyright © JLO (1984) Limited 1985

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