Hyperbaric Oxygen (Hard Chamber) Therapy?

Hyperbaric oxygen  therapy (HBOT) is the intermittent inhalation of up to 100% oxygen at pressures FAR greater than at sea level. The technique may be implemented in a multi-place chamber (usually a large steel cylinder) highly pressurized with air while the patients breathe 100% oxygen. Alternatively, a monoplace (1-person) chamber, highly pressurized with 100% oxygen, may be utilized. A variation is the "'mildly/soft" pressurized chamber but is way less effective than the hard chambers.