Acidity in the endolymphatic sac fluid of guinea pigs.
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.
Tsujikawa
S
S
Department of Otolaryngology, Kansai Medical University, Osaka, Japan.
Yamashita
T
T
Amano
H
H
Kumazawa
T
T
Vosteen
K H
KH
D000818:Animals; D004566:Electrodes; D004712:Endolymphatic Sac / Q000502:physiology*; D005260:Female; D006168:Guinea Pigs; D006863:Hydrogen-Ion Concentration; D008297:Male; D008564:Membrane Potentials