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Easy answer: no.
CNS ox-tox is a totally different problem than pulmonary toxicity.  You
can accumulate lung injury over time if you have repeated exposures
without sufficient time for recovery in between.  CNS toxicity on the
other hand is not well understood in terms of exactly how it happens,
all we know is what situations increase your risks of it happening.  
It is a problem of the interaction of brain chemistry and/or circulation
and high oxygen concentration (gas tension).  What ever the trigger is,
it is more of an immediate response to the current oxygen concentration,
not related to the cumulative exposure over time.  That's not to say its
always instantaneous, rather, its an active process over a period of
minutes.
(I will now exit Professor mode)
Wendell


Jsuw@ao*.co* wrote:
> 
> JT has mentioned that there was a 24 hour surface interval before the
> dive
> where the seizure occurred.  Even with that amount of time, I can't
> help but
> wonder about the possibility that repetitvve high PO2 exposures may
> have
> contributed.
> 
> Jan
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