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From: Jason Rogers <gasdive@sy*.DI*.oz*.au*>
Subject: Re: CNS O2 toxicity in humans
To: ddoolett@me*.ad*.ed*.au* (David Doolette)
Date: Sat, 27 May 1995 18:14:48 +1000 (EST)
Cc: techdiver@terra.net

Hi,
David asked everyone to list any o2 symptoms along the lines of:
****
1. convulsions
2. definate symptoms = nausea, dizziness, muscle twitching (indicate which)
3. probably symptoms = anything else (indicate what symptoms)
****
I've had symptoms of *something* 4 times.  On each occasion I had
visual disturbance, (tunnel vision).

Once at 30m, while using *totally* inadequate breathing equipment, while
working *very* hard.
Twice at 50m, once using poor equipment and working quite hard, (this
one I allowed to reach the stage of totall visiual loss) once working
*very* hard while breathing good equipment.
Once at 60m, breathing ok equipment (well tuned 70's scubapro, MK2?)
wile not working very hard at all.

According to the VENTID thing, these belong in cat 2, but my personal
feeling is that they belong in 3.  Oh, and they were all on air.

Symptoms disappeared after a couple of minutes of rest.

Hope this helps, Jason :)

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