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	In other words, the risk levels go up but good diving practices
keep them acceptable. If you are known to have a PFO or one of these
stress opening FO thingies, you ought to be a bit more careful and
conservative.

	At the moment our acceptable levels of risk are based on an
amalgam of PFO and nonPFO subjects. What is important is whether, *if*
PFO elevates risk, that level of risk is acceptable. If it is, then
there is no reason why PFO cases shouldn't dive.

	What might be discussed is whether ascent rates, tables, dive
practices etc should be altered for people with PFO to bring their risk
down.

	Lets face it, DCI risk, whilst one of the biggies as far as
divers are concerned, is pretty low all told. It's up to everybody to
make their own cost benefit on every dive. I get f**king cold extending
my stops to make myself happy, and I know Prof Pyle has good reason to
err big time on the side of caution. Others have weighed the system and
trimmed it to an acceptable level of risk with minimum stops (and don't
let us forget it! :-) ).

	Cheers,

	Jason

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