The Developing Electrolytes Concentrations of Inner Ear Fluids in Guinea Pigs

Naoyuki KanohFrom the Department of Otolaryngology, Faculty of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan

Masaki OhmuraFrom the Department of Otolaryngology, Faculty of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan

Tatuya FukazawaFrom the Department of Otolaryngology, Faculty of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan

Yoshinobu HironoFrom the Department of Otolaryngology, Faculty of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan

Kazuo MakimotoFrom the Department of Otolaryngology, Faculty of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan

Abstract

Cochlear endolymph, scala tympani perilymph, and scala vestibuli perilymph were collected from fetal, neonatal, and mature guinea pigs. The concentrations of Na and K in these fluids were then assessed using a microflame photometer. The electrolyte composition in the endolymph was already characterized by a high concentration of K and a low concentration of Na by the 49th day of gestation. Key words: the guinea pig development, inner ear fluids electrolytes, microflame photometry.

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The Developing Electrolytes Concentrations of Inner Ear Fluids in Guinea Pigs

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