Studies of tissue electrical admittance: relation to tissue sodium for different zones of rabbit kidney.
Tissue electrical admittance (reciprocal impedance) and Na+ concentration were determined in slices of rabbit renal cortex, outer medulla, inner medulla and the papilla. In each zone admittance was highly and significantly correlated to tissue Na+ (r = 0.71 to 0.91, p less than 0.001). The cortex admittance proved a relatively insensitive index of tissue electrolyte concentration. The highest sensitivity was observed for the outer medulla: values for the inner medulla and papilla were slightly lower. The data confirm the usefulness of admittance measurement for dynamic assessment of the cortico-papillary electrolyte gradient but show that the values measured in the outer medulla cannot be directly compared with those for the inner medulla and the papilla.
Sadowski
J
J
Department of Applied Physiology, Medical Research Centre of the Polish Academy of Sciences, Warsaw.
Kulczykowska
E
E
D000818:Animals; D004553:Electric Conductivity; D066298:In Vitro Techniques; D007668:Kidney / Q000502:physiology*; D007672:Kidney Cortex / Q000502:physiology; D007679:Kidney Medulla / Q000502:physiology; D008297:Male; D011817:Rabbits; D012964:Sodium / Q000378:metabolism*
D012964:Sodium