Kinoshita H, Ochi K, Sugiura N, Kenmochi M, Nishino H, Ohashi T. Changes in CAP adaptation in experimentally induced endolymphatic hydrops.
Auris Nasus Larynx 2003;
30 Suppl:S19-23. [PMID:
12543155 DOI:
10.1016/s0385-8146(02)00127-x]
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Abstract
OBJECTIVE
To determine the effect of experimentally induced endolymphatic hydrops (ELHs) on compound action potential (CAP) adaptation.
METHODS
The CAP was recorded 1 month after surgical treatment to produce ELH. The CAP threshold in response to click stimuli showed no significant differences between the hydropic and control groups. The CAP was elicited from the retroauricular-exposed round window using a silver ball electrode. Click trains consisting of 10 clicks with an interclick interval (Deltat) of either 4 or 8 ms were delivered through a loudspeaker placed in front of the animals' ears. The patterns of adaptation to these click trains were evaluated as functions of Deltat and intensity level.
RESULTS
An abnormal pattern of CAP adaptation was observed in hydropic ears.
CONCLUSIONS
These findings suggest that early ELH influences CAP adaptation.
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