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Anin Vivo Study With Glass Microelectrodes

Tsunehiko Nakashima, MD; Michael J. Sullivan; James B. Snow, Jr., MD; Fumiro Suga, MD

Arch Otolaryngol. 1970;92(1):1-6.

Abstract
Changes in the sodium ion (Na⁺) and potassium ion (K⁺) concentration of the endolymph and the perilymph of the scala tympani and the scala vestibuli of the cochlea of the living guinea pig were measured with cation-sensitive glass microelectrodes. Intense acoustic stimulation increased the Na+ concentration and decreased the K⁺ concentration in the endolymph. The endolymphatic Na⁺ concentration did not return to the control level after intense and prolonged acoustic stimulation. Similar stimulation slightly decreased the K⁺ concentration in the perilymph of the scala vestibuli, but the Na⁺ and K⁺ concentration in the perilymph of the scala tympani showed no appreciable change.

Author Affiliations
Oklahoma City

From the Department of Otorhinolaryngology, University of Oklahoma Medical Center, Oklahoma City. Dr. Suga is now with Kyushu University, Fukuoka, Japan.

Footnotes
Accepted for publication Feb 18, 1970.

Reprint requests to the Department of Otorhinolaryngology, University of Oklahoma, 800 NE 13h St, Oklahoma City 73104 (Dr. Snow).

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