| EFFECT OF VENTILATING AIR FLOW ON HUMAN WATER REQUIREMENTS, (2005) | |||||||||
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| This paper will present the results of a preliminary experiment designed to study water requirements of mean wearing partially donned and fully donned pressure suits. The 13-day test was conbucted at an altitude of 27,000 ft in an atmosphere of essentially 100% oxygen. The pressure suits were similar to standard pressure garments except the arms and legs were detachable at the middle of the upper arm and leg. Ventilating air flow was provided by means of on-board, high-speed centrifugal compressors. Water requirements were determined by measuring water intake and output, as well as following urin osmolarity, specific gravity, blood hematocrit, and urea nitrogen. Water requirements were found to increase over previously noted values at this altitude. This increase was reflected by a slight decrease in urine volume and by an increase in water lost through the lungs and skin. The pressure suits were well tolerated by the test subjects and posed no particular problem. The effects of the suits on the men and on heat exchange pathways were discussed. (Author) | |||||||||
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