[Effects of perilymphatic perfusion with cisplatin on the cochlear potential in guinea pigs].

The effects of three concentrations of cisplatin, administered by acute perilymphatic perfusion on the endocochlear potential (EP) and the cochlear microphonic potential (CM) of the guinea pig cochleae, at 1 kHz are reported. No change in EP magnitude was discovered and a concentration-dependent reduction in CM amplitude occurred during 60 minutes' perfusion period. The results suggest that cisplatin-induced hearing loss is not necessarily progressive degradation of EP.