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> Just some more interesting facts on hypoxia at altitude... If a man were >placed at 19 000 m (63 000 ft) altitude, his lungs would be filled with water >vapour, and no air or oxygen could enter his lungs (because at the body temp >of man, the water vapour pressure is 47 mm Hg (6.28 kPa)). [= 0.0628 bar] > I.e. his body fluids would boil at blood heat, i.e. he would suffer >space-type decompression injury, he would need a pressure suit. Presumably if >the air pressure was at least c. 0.1 bar, he could get away with a pure oxygen >breathing set, but would need acclimatization to live on that little ppO2. I know that this is getting off the track and I apologize, but I remember seeing a special (discovery, nova, - one of those type) in which they were shooting for the world record parachute height - going from a hot air balloon. I remember that these balloons were up at a height of 100,000 feet (+- a few thousand at various times). Now, they were wearing suits, but I thought that they were exposure suits for the cold with supplementary O2 and not some type of pressure suit (i.e. they did not maintain pressure the way an astronaut's suit would). Am I mistaken (were these suits pressure suits?)??? -Carl-
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