Continuous measurement of conductivity of biological fluids.
- 1 December 1967
- journal article
- research article
- Published by American Physiological Society in Journal of Applied Physiology
- Vol. 23 (6) , 1010-1013
- https://doi.org/10.1152/jappl.1967.23.6.1010
Abstract
A circuit is described and evaluated for the continuous determination of the conductivity of biological fluids such as urine. A conductivity cell is placed in parallel with one arm of a balanced 4-arm bridge connected to a carrier amplifier. In the conductivity of the cell is at least 100 times less than that of the arm of the bridge, the response of the amplifier is linearly related to conductivity. The circuit has been used extensively for the biological assay of antidiuretic hormone (ADH) using ethanol-anesthetized rats. It was used with dogs to monitor water and electrolyte excretion and could be used to measure the hematocrit ratio or blood dilution.This publication has 3 references indexed in Scilit:
- Biological impedance determinationsJournal of Cellular and Comparative Physiology, 1965
- ACUTE REDUCTION IN EXTRACELLULAR FLUID VOLUME AND THE CONCENTRATION OF ANTIDIURETIC HORMONE IN BLOOD1Endocrinology, 1961
- A MAJOR COMPONENT OF NEUROHYPOPHYSIAL TISSUE ASSOCIATED WITH ANTIDIURETIC ACTIVITYJournal of Neurochemistry, 1959