Quote: (Originally Posted by Marcin Kaluza)
The idea is that oxygen is a vasoconstrictor and it means that breathing it for prolonged time means that your gas exchange gets impaired. By how much nobody knows but it seems to be a goood idea to let your body rest for a while after breathing pure O2 for some time.
I really need to find somebody who knows more about this all. The doctor I asked did not seem to give me a satisfactory answer to my question about the effects of breathing 100% percent oxygen, and certainly not after how much time this happened, and which aspect caused the problems (the high concentration in the lungs? The higher pO2 in the blood?). Anyway, I decided I could not continue my questions to the more difficult bit about oxygen above atmospheric pressure. I think I will have to pester some more doctors
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I hadn't heard about the vasoconstrictor effects. It surprises me, als hyperbaric oxygen ("deco tanks") have an important role in the treatment of wounds which take a long time healing (eg. in diabetics or other patients where blood supply to the extremities is impaired).
Any experts on board?