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[Electrocochleography possibilities in the differential diagnosis of hydrops and neural hearing loss]
N Marangos1, A Mausolf, B Ziesmann
1HNO-Klinik, Medizinischen Hochschule Hannover.
HNO
|February 1, 1990
Abstract:
Enhancement of the click-evoked summating potential causing a pathological summation to compound action potential ratio (SP/CAP) in patients with endolymphatic hydrops has been described by several groups. An increased SP/CAP ratio is found also in some patients with a tumour of the cerebellopontine angle. The study of further parameters of the SP/CAP complex, such as the CAP latency and the width of the complex, permit an electrocochleographic differentiation between both forms of hearing loss. The N2 amplitude showed no diagnostic significance.