"Informal" In-water Recompression
Although in-water recompression is regarded as risky, and to be avoided, there is increasing evidence that technical divers who surface and demonstrate mild DCS symptoms may often get back into the water and breathe pure oxygen at a depth 20 feet/6 meters for a period of time to seek to alleviate the symptoms. This trend is noted in paragraph 3.6.5 of DAN's 2008 accident report. The report also notes that whilst the reported incidents showed very little success, "e must recognize that these calls were mostly because the attemped IWR failed. In case the IWR were successful, diver would not have called to report the event. Thus we do not know how often IWR may have been used successfully."
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