NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Effect of hypovolemia, infusion, and oral rehydration on plasma electrolytes, ADH, renin activity, and +G/z/ toleranceEffects on plasma volume, electrolyte shifts, and +G(z) tolerance induced by: (1) blood withdrawal; (2) blood infusion; and (3) oral fluid intake, were determined at 0.5 G/min in centrifugation tests of six ambulatory male patients, aged 21 to 27 yrs. Hypovolemia induced by withdrawal of 400 ml blood, blood infusion followed by repeated centrifugation, effects of consuming an isotonic drink (0.9% NaCl) to achieve oral rehydration, and donning of red adaptation goggles were studied for effects on acceleration tolerance, pre-acceleration and post-acceleration plasma renin activity (PRA) and plasma vasopressin levels. No significant changes in post-acceleration PRA compared to pre-acceleration PRA were found, and administration of oral rehydration is found as effective as blood replacement in counteracting hypovolemic effects.
Document ID
19770062674
Document Type
Reprint (Version printed in journal)
Authors
Greenleaf, J. E. (NASA Ames Research Center Moffett Field, CA, United States)
Brock, P. J. (NASA Ames Research Center Moffett Field, CA, United States)
Haines, R. F. (NASA Ames Research Center Moffett Field, CA, United States)
Rositano, S. A. (NASA Ames Research Center Moffett Field, CA, United States)
Montgomery, L. D. (NASA Ames Research Center Moffett Field, CA, United States)
Keil, L. C. (NASA Ames Research Center Moffett Field, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
August 1, 1977
Subject Category
AEROSPACE MEDICINE
Funding Number(s)
CONTRACT_GRANT: NCA2-OR180-506
Distribution Limits
Public
Copyright
Other