| Re: Query on 'Off Effect'
As I understand it the "off effect" is a convulsion induced by a rapid drop in po2 after breathing very elevated po2's for a time.
Having had a "practical" demostration of this effect and a subsequent conversation with the hyperbaric doctor I am led to belive that if a diver has been breathing very high po2 without convulsion switching to a gas with a much lower po2 can trigger a convulsion. I dont think which ever inert gas is also present makes much difference.
In my case it was suggested that had I taken the diver to the surface without him bailing out (ie stayed on the loop) he MAY not have convulsed as the po2 would have reduced more slowly!
HTH
Dave |