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Does anyone know the mechanism behind this low 02 phenomena? Why would not 02 saturation in hemoglobin go right back to 98-99% very quickly after the start of breathing?
PS - Blueface, I forgot to say " well done on your rescue!!!" no matter how you feel you handled the situation, you managed to keep the airway above the water, and that is the most important thing!!!
great story Skip, thanks for sharing it. The scenario is OH so classic. At that depth, a correctly weighted diver would take about 30 seconds to reach surface. The feeling of well being due to the pressure, and a new eager spearo.. perfect BO ingredients.
Glad you were all OK learned a lot, and great save on your part.
hyperventilation and the "feeling of well being" are separate issues.
Yes azapa, thanks for making that clear. I get that "feeling of well being "at about 25 meters and when I first experienced it I was tempted to stay for as long as I could but I had been warned about it by a friend. When I feel that I pay closer attention to the time.
Skip
Don't feel bad, it happens to us all. And the truth is, everybody is ultimately responsible for themselves.
I invited a DBer that I'd never met on a Bahamas trip (unirdna). He B0ed on me the first day on a 125 ft dive. First time I'd ever seen anybody do a long dive in that kind of depth, much less actually rescue anybody. Sobered us both up.
By fortunate coincidence, that was my first dive trip after a PFI course (and I still screwed up the rescue).
There is a good thread on his B0, a few pages back in Freediving stories, worth reading. "Lessons leaned in the Bahamas, an intimate account of our greatest enemy" or something like that.
Connor
It was "interesting" all right. I'd just as soon be stay on the boring side!
Personal opinion, yes, unirdna was having a touch of narcosis. Since then, I've watched the forums closely for further information, little bits, trickling out slowly. Efattah especialy has had some good observations.
Narcosis is an issue that isn't well known or fully understood for freedivers. Its been known for a while that narcosis is a major problem for deep competition CWF or no limits dives. There appear to be two causes, N2 and C02, probably in combination. Could be, for freedivers, the C02 side is more important. Further, it appears that dives to moderate depths, like 30 meters or slightly less, can run into narcosis issues. Diving exhale (frc) is thought to minimize narcosis problems and I've certainly noticed a distinctly more "clear headed" feeling than normal on deeper frc dives. That could be lessened narcosis, maybe.
Connor