1989 年 20 巻 1 号 p. 33-34
After the application of saturated NaCl solution to the round window membrane, the K+ or Na+ activity was recorded in perilymph or endolymph of the basal turn with the double barrelled K+ or Na+ selective microelectrode for 60 minutes. The K+ and Na+ activities in the scala tympani rapidly increased and then decreased. The K+ activity in the scala media also rapidly insreased and then decrased, but the Na+ activity continued to increase during 60 minutes. After the application the K+ activity in the scala vestibuli did not change, the Na+ activity slightly increased. These results suggest that the K+ and Na+ clearances are higher in the scala vestibuli than in scala tympani, and Na+ clearance is lower than K+ clearance in the scala media.