BMJ 1998;317:1063-1066 ( 17 October )

Clinical review

ABC of oxygen

Oxygen at high altitude

Andrew J Peacock. 

The first 150 words of the full text of this article appear below.

The number of people travelling to the high altitude regions, especially South America, Nepal, and India, has risen enormously in the past 10 years. Without special climbing ability these trekkers can be exposed to altitudes they will not have encountered in their home countries. For example, the height of Everest base camp is 5500 m whereas the top of Mount Blanc, the highest mountain in the Alps, is only 4800 m. The areas with the highest mountains are also the areas with the poorest facilities, especially for medical care. Trekkers must therefore understand the effects of altitude on their bodies (hypoxia, cold, and dehydration), the processes of acclimatisation, and prophylaxis against and treatment of altitude illness.

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High altitude can also be a problem for people with cardiopulmonary disease, many of whom take long haul flights on commercial aircraft. They need to know how their condition can be affected by the cabin altitude of . . . [Full text of this article]

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