Mt Whitney Zone Forums General Discussion High altitude survival airplane quiz

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"Simply increasing the fractional concentration of oxygen is totally inadequate at pressure altitudes above 40,000. Measured aveolar oxygen pressures in subjects breathing 100% oxygen are only about 34Hg at 45,000 feet You would die of hypoxia breathing 100% oxygen at a pressure altitude of 45,000 feet. To survive you would need to decrease pressure altitude through pressurization or breath positive pressure oxygen."
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Got this info from this site - www.dr-amy.com/rich/oxygen
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