I had an abdominal wound that required special wound care for many months (several years ago). They considered HBOT, but after extensive treatment, it finally healed on it's own so I didn't need the HBOT.

It seems logical that diabetics have a hard time with wound healing due to reduced nerve fibers (especially in extremeties) and I know that this was the majority of patients using the HBOT while I was in the wound care center. It was very helpful and really only good option for these patients. Since I was being considered for HBOT, they did discuss its effectiness with me and apparently it has a great success rate (compared to traditional wound care).

Sorry I don't have more to offer, but the impression I got from watching patients use it over the months I was being treated in the wound center and the comments about it's effectness from the staff all were very positive.