Journal article

Transient vasopressin release and thirst in response to prolonged intracerebroventricular infusions of hypertonic mannitol in saline.

MJ McKinley, K Olsson, F Fyhrquist, E Liljekvist

Acta Physiol Scand | Published : 1980

Abstract

In the conscious goat infusions of 0.4 M mannitol in 0.15 M NaCl into the lateral cerebral ventricle (40 or 100 min, 0.02 ml/min) caused slight, transient vasopressin release and temporary thirst, whereas infusions or pure, hypertonic (0.7 M) mannitol did not elicit thirst and inhibited the basic vasopressin release in the nonhydrated animal. In contrast, infusions of equiosmolal (0.35 M) NaCl induced persistent thirst and pronounced elevation of the plasma vasopressin concentration throughout the infusion period. The cerebrospinal fluid (CSF) osmolality was raised by the same order of magnitude (= 13%) after the mannitol/NaCl and the hypertonic NaCl infusions. The CSF Na+ concentration was ..

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University of Melbourne Researchers