One second of critical thinking tells you the theory is worthless.
So how common are hyperbaric chambers in trauma centers?
I know the Navy brought some to the hospital (the carrier took a chunk out of a pedestrian walkway), but what would happen if they needed one and one wasn't there?
Hopkins in Baltimore had two of them in 1983. One reason they told me was because drugs have an easier time getting into the bloodstream.
I got into a nasty accident on a bike and gotta helicopter ride to shock-trauma that year.
I needed a few operations to make things work again and I woke from most of those in the hyperbaric. I even had some hyperbaric therapy which was basically sitting in there for 2-4 hrs a day.
Seemed to work, I can walk again.