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On Sun, 29 May 1994 ddoolett@me*.ad*.ed*.au* wrote However there is no sound physiological > basis for deep recompression. Recompression for DCI has two aims, to > shrink bubbles and to provide HBO. To address the former, the volume > of a bubble is related to the cube of its radius and the area to the > square of its radius (I can never remember the formulas so check this > V=(4Pi/3)r^3 and A=(4Pi)r^2). So the effect of compression on bubble > radius and area diminishes with increasing pressure (cf. Boyle's law), > after the first couple bar of compression you aren't getting much value > in bubble shrinking. Next you want to breath HBO so that that you are > not putting any more inert gas back into your tissues or your bubbles. > HBO should also speed up the offgassing of inert gas from your tissues > and bubbles. If you try recompression therapy breathing an inert gas > you will be on-gassing in some tissues which will provide a inert gas > resevoir for further bubble growth during subsequent decompression. > Trying to recompress to below symptom relief will likely require > breathing other than pure O2. Let's not fool ourselves, IWR is a > quick and dirty solution to your problem, ideally you should be in a > RCC, so I would not try anythig too flash, I would stay shallow and > use pure O2, this will help and likely not exacerbate the DCI, > trying to recompress breathing an inert gas may make things worse. > If you have no submersible O2 supply stay on the surface. > Ditto David and VERY WELL SAID ... have to agree with you on that one.. i worked at the chamber for a while here, it's true that they are a BIT behind the times.. (in my opinion). ALSO FOR ANY ONE READING AND NOT PAYING ATTENTION, PLEASE NOTE THAT YOU SHOULD *NEVER EVER* GO PAST TWENTY FEET ON O2 UNLESS YOU HAVE A FULL FACE MASK, AND ONLY THEN IF YOU ARE READY TO CONVULSE... *AND* AFTER 20 MINUTES ON O2 YOU SHOULD GO BACK TO AIR FOR FIVE MINUTES (NOT TO BE INCLUDED IN YOUR DECO SCHEDULE), THAT'S AFTER *EVERY* TWENTY MINUTES.. > David Doolette > ddoolett@me*.ad*.ed*.au* > -- > Send mail for the `techdiver' mailing list to `techdiver@opal.com'. > Send subscription/archive requests to `techdiver-request@opal.com'. >
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