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OTORINOLARINGOLOGIA

A Journal on Otorhinolaryngology, Head and Neck Surgery,
Plastic Reconstructive Surgery, Otoneurosurgery


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Otorinolaringologia 1998 June;48(2):63-6

Copyright © 2000 EDIZIONI MINERVA MEDICA

language: English

Electrocochleography in CSOM: click stimulus vs tone bursts

Chauhan Jaimanti K., Mann S. B. S., Panda N. K., Gupta A. K., Raghunathan M.

From the Department of Otolaryngology Postgraduate Institute of Medical Education & Research Chandigarh, India


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Elec­tro­coch­le­og­ra­phy was con­duct­ed on 30 ­patients ­with dry cen­tral per­fo­ra­tions of the tym­pan­ic mem­brane. Coch­le­ar micro­phon­ics (CM), sum­mat­ing poten­tial (SP) and ­action poten­tial (AP) ­were ­found to be 0.8 uV, 0.3 uV and 7.48 uV respec­tive­ly in cas­es of ­CSOM ­with mod­er­ate ­degree of con­duc­tive hear­ing ­loss. The SP/AP ­ratio was ­found to be 0.11. An ­increase in the laten­cy and ­decrease in ampli­tude of electri­cal poten­tials was ­also ­found. ­Click as stim­u­lus was ­found to be bet­ter ­than ­tone ­bursts in a sig­nif­i­cant num­ber of cas­es (p<0.01).

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