Oh, they have chambers.
They reserve them for scheduled hyperbaric medicine patients (wound care, etc.), and the chambers are staffed for that schedule. DCS patients screw that up.
Teenager with DCS, mother in denial, treatment delayed
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They reserve them for scheduled hyperbaric medicine patients (wound care, etc.), and the chambers are staffed for that schedule. DCS patients screw that up.
OP
Grandma died earlier.
admikar
Contributor
Does anyone have an update on how he is doing now?
That's a just "going into deco" with extra steps.
I don't understand this at all. He said he sets his computer to something close to pure Buhlmann, never exceeds it, and then hangs around for an extra long safety stop. That's all he really said. How is it "Going into deco with extra steps" if he never goes into deco?
On the other hand, here is a procedure I described years ago that got me into trouble because one user got all hot and bothered by it. When I was deco diving, I used a GF high of 70, which is very cautious. When I did a NDL dive, I never changed my GFs because (1) I am lazy and (2) I know what the numbers mean. That means I technically went into deco on an NDL dive before others did, but I knew that if I had just changed the settings to a higher GF, I would not be in deco. So was in deco or not?
I just did what the computer said was a deco stop at about the same time other people were doing their safety stops, and usually my deco would clear before they were done with their safety stops.
I don't do that anymore because people who do not have the mental capacity to understand these things get all upset if I talk about it, and, who knows, maybe someone might look at my wrist late in a dive and have a coronary.
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That's why I dive 80/95 and use SurfGF to determine my surfacing. I never go into deco on a no deco dive, have maximum bottom time, and surface when I think it is quite safe.
a) every dive is a decompression dive. b) the risk he's taking is the same (or greater) than just sitting your computer to the gradient factors you wish to surface at because of the potential for the loss of situational awareness
The time you spent under pressure is the risk, modifying the settings on the computer so you are not "in deco" doesn't change that risk, but it does remove tools to help you manage it.
dmaziuk
Contributor
That's what you get for shelling out all those bucks on a computer with a shiny oled screen: now you have to worry that others can see it.
By strict definition of the term, that is true, but as we really use the term, it is not true.
With the tremendous assistance of Dr. Simon Mitchell, I wrote this article on the then latest thinking on ascent profiles for decompression dives. (Not much, if anything, has changed.) When I was done, I was stoked to do the same thing for NDL diving, and I asked Simon if he would help as he had for the decompression diving. He politely refused, saying there was not much of any good research on different approaches, and he frankly did not have an opinion. Undaunted, I did my own research, and when I was done, I concluded that there is not much of any good research on different approaches, and I frankly do not have an opinion.
But I did conclude strongly that there really is a significant difference between dives where we have incurred required decompression stops and true NDL dives, with kind of a fuzzy no man's land in between (the realm of required optional safety stops).
This explanation will be overly simple. When you have required decompression and take longer than the optimal amount of time to ascend from depth, you incur a penalty that you must pay in added decompression time. With an NDL dive, if you begin your ascent within NDLs, you can take your sweet time heading up, taking as long as you want as long as you don't violate NDLs. You should still be able to go directly to the surface, although a safety stop is recommended to be on the safe side.
If I do a 90 foot dive using EANx 32, the NDL on the PADI tables is 35 minutes. If I start my ascent at, say, 32 minutes and then stop at, say, 75 feet for a while, and then maybe go to 60 feet, etc. I could easily end up with an 80 minute dive, and it should still be OK for me to go straight to the surface. (I pulled those numbers off the top of my head, but they are reasonable.)
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