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Previous Volume 336:229-230 January 16, 1997 Number 3 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: A 34-year-old man spent approximately 6 weeks at or above 5500 m climbing on Mt. Everest. He spent 4 weeks at 5500 m, 2 days at 6000 m, 10 days at 7000 m, and 3.5 days at or above 8000 m. The barometric pressure of 380 mm Hg at base camp (5500 m) is approximately half that at sea level, resulting in a partial pressure of arterial oxygen of approximately 40 mm Hg. The barometric pressure above 8000 m is approximately one third that at sea level, resulting in a partial pressure of arterial oxygen of approximately . . . [Full Text of this Article]

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