We believe that necrosis comes from long nitrogen exposures, whether they be deep or as part of extreme deco, as well as completely wrong decompressions from any gas, like what is taught out there now ( if it were to be applied to real diving like what we do). Lukily, anyone who does real diving quickly ignores this slop and gets the real truth. When I did do air dives ten years ago and more that were "deep" or even not so deep , the bottom times were extremely short. I have never done a long bottom time other than on gas, but I always did the decos short and sweet, from a deeper depth. My big exposures are all on gas, but here was no template for this behavior, and everyone said I would pay the price . So far they are full of shit. There are WKPP divers who ar no longer on the team who did get necrosis in the shoudlers, but they were doing very long cave dives on air at all kinds of depths, and they decoed on air as well. The big offenders in necrosis are the old "commercial" divers who did long dives at 200 or so on air - they have the lesions and the necrosis. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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