EFFECTS OF HEAD-DOWN TILT ON FLUID AND ELECTROLYTE BALANCE

  • 1 January 1976
    • journal article
    • research article
    • Vol. 47  (10) , 1065-1068
Abstract
The metabolic effects of -5.degree. tilt were studied in 8 normal individuals. Exposure to tilt for 24 h increased Na excretion and decreased plasma volume. Plasma renin activity and plasma aldosterone levels were not significantly different from supine values during the first 6 h of tilting, but were increased significantly at the end of the 24-h tilt period. Creatinine clearance and K balance were not affected by the tilt. Head-down tilt induces a Na diuresis and stimulation of the renin-angiotensin-aldosterone system an important factor in aerospace consideration.