The Cabin Air Itself: No Blood Clot Correlation

But the sardine-seating? Get-up and walk.

http://www.nytimes.com/2006/05/17/he...=1&oref=slogin

Airplane Air Found Not to Cause Blood Clots
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By REUTERS
Published: May 17, 2006
Reduced air pressure and oxygen levels do not appear to promote the
formation of deadly blood clots on long commercial flights, an ailment
sometimes called "economy-class syndrome," a new report said. The
findings seem to bolster the belief that clots develop in otherwise
healthy people mainly because they sit in cramped quarters that slow
blood flow, especially in the legs, not because of cabin environment.
Travelers have been advised for several years to try to exercise their
leg and calf muscles or walk around the cabin to prevent the
development of clots that can travel to the lungs, brain or heart. The
same problem can occur on long car or train trips. The study was
published in this week's Journal of the American Medical Association.

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