Altitude Illness
Altitude IllnessPeter H. Hackett, David R. Shlim The high-altitude environment exposes travelers to cold, low humidity, increased ultraviolet radiation, and decreased air pressure, all of which can cause problems. The biggest concern, however, is hypoxia. At 10,000 ft (3,000 m), for example, the inspired PO2 is only 69% of sea-level value. The magnitude of hypoxic stress depend..