> In the absence of clinical signs or symptoms, after a blowup from 220,
> I would be inclined to make the decision based on what my bottom time

I think it was something like 20-25 minutes.

>  I'd probably be
> inclined to go to 5/4 of the violation depth and resume as before,

So would I, but my point is, all sorts of differnet kinds of such situations
have proven successful, so it's hard to pinpoint the "best" approach.

> Your 25 foot compromise sounds
> like a good general guideline - perhaps 30 to 20 feet depending on the
> accumulated oxygen dose during the dive?

As I learn more and more about CNS O2 toxicity, I become less and less
convinced that accumpated "dose" (i.e., prior exposure) has much influence
on probability of convulsion.

Aloha,
Rich

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