We dove patients for many reasons, some proven reasons such as gas gangrene, and decompression sickness. Other research dives included cardiovascular disease, more rapid healing of Oral Surgery procedures, C-cut Osteotomies, to evaluate removing wires earlier after surgery. There were a host of studies that we were looking at, and some looked promising, while others were pure bunk.
We have, I think, seven (eight?) interlocking chambers, anything as small as one patient and two attendants to eight patients and three attendants. Most dives are wound related, decomp sickness, CO poisoning (in light of the evidence it doesn't really work), an occasional AGE; for research, we have done flying after diving and altitude research. We also get a lot of military guys from Bragg/Pope, Lejeune, Norfolk, both for treatment purposes and to chamber ride for pre-dive school.
I enjoy it. It's mostly boring, but with the critical care patients it's very autonomous....my typical "order set" is: "Don't let the patient die."