You will find you get better outcomes when treating at 2.4 ATA vs 2.0 ATA. Not all patients respond to 2.0 ATA. If you can do an in-chamber TCOM, you will see the difference in some patients. At our facility we treat at 2.4 ATA with two 5 minute Air Breaks. Air Breaks are given regardless of treatment pressure. Not all patients fit this criteria, ie: COPD pts, pts with a history of seizures, those on pain mangement programs etc etc. We have specific protocols drafted up for them. If you want a good idea on what is safe to treat patients, I highly recommend purchasing "Hyperbaric Medicine Practice" by Eric Kindwall, MD & Harry Whelan, MD, if you have not done so already. Every unit should have this.