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Just to back up this last point, its been a well established fact in medicine that any ppO2 over 40% for more than 24 hours has a strong potential to cause permanent lung damage. When my son took a chamber ride at Duke last summer after a minor type I bend, the doc there told me that many of their patients have at least some lung symptoms after even the shortest table treatments. I wonder if they would have fewer problems and better treatment if they adopted a schedule of more frequent air breaks. The Comex treatment tables using heliox instead of pure oxygen at the deeper chamber stops are also intriguing along this line. Wendell G *Trey wrote: > Terry, even the 1.6 of 20 feet will give you a fit in the damage department, > and in fact pure oxygen at any partial pressure seems to have that effect, > it just happens faster and more decisively at the higher partials, meaning > you feel the damage on the spot whereas the lower partials take until the > next day to realize you "burnt" your lungs. > "Edited for bandwidth -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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