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Acidity in the endolymphatic sac fluid of guinea pigs
S Tsujikawa1, T Yamashita, H Amano
1Department of Otolaryngology, Kansai Medical University, Osaka, Japan.
Abstract:
The pH value and the DC potential in the endolymphatic sac (ES) were measured using H(+)-selective double-barreled electrodes and the intra- and extradural approach, the pH value in the ES fluid (6.65 +/- 0.12, n = 7) was markedly lower than that in the cerebrospinal fluid (7.39 +/- 0.07, n = 7). Acidity in the ES fluid, under normal (nontreated) conditions may be closely associated with metabolism in the epithelium of the ES.