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Previous Volume 357:1445-1446 October 4, 2007 Number 14 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: Muhm et al. (July 5 issue)¹ report that at a barometric pressure equivalent to an altitude of 8000 ft (2438 m) above sea level, participants in their study had a maximum decrease of only 4.4 percentage points in oxygen saturation, as measured by pulse oximetry. We are concerned about the accuracy in their setting.² To simulate high-altitude exercise in aircraft-cabin personnel, we examined 75 subjects between the ages of 24 and 62 years under normobaric, hypoxic conditions in a closed cabin with an oxygen content of 14.8%, the equivalent of conditions at an altitude of 9186 ft . . . [Full Text of this Article]

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