As a ex-scuba diver i think you will be fine.I a life time ago a introduction course how to operate a hyperbaric tank with noordhoek diving in rotterdam.But that is ages ago.
I think you will breath pure oxigen true your mask.How many sessions are you going to do for that 6000 dollars?o

What also could be the case with many of us is that our own immune system is attacking our bodies.
I have often thought of why my nerves got so damaged long after i took the medicine that is responsible for my nerve damage.

I found a very interesting article in the dailymail
http://www.dailymail.co.uk/health/ar...NT-KILLER.html