Sean:
Another interesting and unique patient.
I want to be sure of one thing ... before we hazard into unknown and unsupported 'guessing.'
Are you absolutely positive that you pressurized on oxygen? If the patient was at 2.0ATA for 90 minutes of air, I could come up with a 'rare' incidence of truncal skin changes looking like skin bends .... BUT given the patient's history of already having 43 treatments without this event, I'd look somewhere else.
If you did think this skin bends, did you have the patient breathe surface O2 after the treatment, and did the rash disappear?
Other items to check ... like changes in antibiotics, laundry changing the soap brand, etc. etc.
Others feel free to assist.
My bottom line opinion is that I've never seen a case of true skin bends in someone who didn't breathe air during pressurization. On 100% oxygen, it shouldn't be possible.
gene