@Duke Dive Medicine I think I worded that poorly. Going deeper than 30ft would be done on nitrox/air/something not exceeding a 2.0 ppO2, and the interval of something between 10-30ft would be your belief. I.e. I am going in 10ft, 15ft, 30ft etc. intervals of depth. Wouldn't ever go below 30ft on O2 in the water.
I think a big disconnect we are going to end up having in these discussions is the severity of DCS that we're talking about, and the extend of IWR that we're going to do because of it.
Do I have some pain in my knee/shoulder etc which on my personally, if I get it before I get out, I'm not going to deem that worthy of going to a chamber and not just dropping back down for a bit. If I have any neuro symptoms, then yeah, get me to the chamber. If I'm already warm/dry and something comes on, then I'm going to call DAN and see how quick I can get to the chamber, and depending on how I'm feeling, sort it out from there.
me personally, cave centric, and not advocating obviously
If I can drop down to 20ft and my symptoms resolve *which they have twice before*, I'll hang out for 30mins, go up to 10ft, and hang out as long as I am warm/comfortable/have available O2. Get to the surface, do a surface deco for at least 10-15 mins while I shed all of my gear before I get out of the water, and then hop on O2 for at least a half hour. I have had to do that twice, once from an improper fitting harness in my right shoulder, the other in my knee from being dumb and slipping on a step and landing on it wrong *how I got a bubble in that same knee during the FAD study at Duke actually but several years after the fact*. Symptoms resolved in those instances immediately after I stabilized at depth, and I felt fine once I got out. That to me isn't worth the expense/hassle of going into the chamber for 6 hours. That would be a do as I say not as I do with any students obviously and they'd be booking it to the chamber, but not what I'd personally do.
Musculoskeletal or skin? If I'm in the water, I'm more than likely going back down. I have the O2 and I'm already in the water. No real risk in doing that. If I'm out and dry, it depends on how bad it is and I'll make that call myself
Any neuro or pulmonary symptoms? no way I'm getting back in the water. Surface O2 all the way to the chamber for that guy
My buddies or anyone around me gets to make their own decisions. I make sure that I have all the gear and gas to do Pyle's IWR table, and if they feel comfortable doing it, I'll support them in any and every way that I can.