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On Wed, 7 Sep 1994, J Shepherd wrote: > I don't think it has to be that deep even... I think I've heard > of those symptoms as 'subclinical'DCS. It seemed (IME) to occur after > dives in the 40-50m range (Air) early in the season when doing the stops > called for BSAC 88 tables (i.e. no extra stops - I've got into the habit > of adding lots of 'safety stops'). Basically you get very tired - I have > dozed off in the Compressor shack at Lochaline dive centre whilst the > damn thing was running, for two hours, after diving the Rondo. At the > time I don't think I was quite 'worked up' to it (short bottom time at > 50m). Oh yes - a couple other things. We ONLY get "slow-tissue blues" (STB) after deep (50m+) air dives....NEVER after mixed-gas dives - even though the mixed-dives require much more in-water time (and hence, should INCREASE fatigue). That bit about falling asleep in spite of loud compressors or other distractions is VERY TYPICAL of our experience with STB. The main symptom of STB for us is an overwhelming urge to sleep. I read in an old physiology booklet that this was caused by the body treating pre-symptomatic (pre-classic symptoms, anyway) as foreign "invaders", and that one of the side-effects of the associated released enzymes is an urge to sleep (why we sleep so much when we are sick with cold or flu). Perhaps the medical-types out there could support or refute that hypothesis. Aloha, Rich deepreef@bi*.bi*.ha*.or*
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