Abstract Atmospheric pressure is reduced as a function of altitude, thus making hypoxia, the condition of oxygen deficiency, a concern for aviation. The effects of low grade hypoxia are often subtle and may be missed by both flight crews and passengers. The most severe effects are widely appreciated when high profile incidents occur. The international collective was stirred after October 25, 1999 when Payne Stewart, a professional golfer, and five other persons were killed when a Learjet flew on unmonitored autopilot for approximately four hours before running out of fuel and crashing in South Dakota. Radio contact was lost after the aircrew acknowledged clearance to an altitude of 11900 m (39000 ft). The accident investigation determined that the crew was incapacitated when inadequate supplemental oxygen delivery followed a loss of cabin pressurization. This chapter will discuss the physics and physiology of hypoxia, describe cabin pressurization and discuss the health effects at normal cabin pressure and following unplanned depressurization.
Human Physical Stresses at Normal and Abnormal Cabin Pressures
2005-01-01
23 pages
Article/Chapter (Book)
Electronic Resource
English
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