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Updated: Oct 1, 2026

Ultrasonography of the Adult Male Urinary Tract for Urinary Functional Testing
Published on: August 14, 2019
[Involvement of urodilatin in the hydro-electrolytic modifications induced in man by a 6 degree head-down tilt]
G Gauquelin1, A M Allevard, S Fagette
1Laboratoire de Physiologie de l'Environnement, GIP, Exercice, Faculté de Médecine, Lyon Grange-Blanche, France.
Abstract:
On 6 healthy men, we measured: 1/ the effects of 28-day -6 degrees head-down tilt on the excretion of urodilatin and 2/ the relationship between urodilatin and urinary fluid, or sodium excretion. Aliquots of the pooled 24-h urine output were used. Urodilatin increased parallel to urinary fluid or Na+ at first day of head-down tilt. Positive and statistically significant linear correlations could be established between urodilatin (and ANP) and urinary volume, or Na+ in five subjects on six. Urodilatin might participate as one of the several mechanisms of diuresis and natriuresis of first hours of head-down tilt.
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