kiwi, Dr Harch has not published results of the study he started a few years ago. I check his web site from time to time with hopes that he has something good to report. He has written plenty of anecdotal reports. He likes to write about that near drowning event.

The studies used 1.5 atmospheres if I recall correctly. There are plenty of studies that show 1.25 to 1.5 as adequate for benefit. It does not take much to increase oxygen perfusion. I tried searching for the Florida study. It might have been in Virginia, instead. Bay Pines did a different concussion study.