What is hyperbaric oxygen therapy (HBOT) ? When in a Hyperbaric Oxygen Chamber, you are breathing 95-98% oxygen (the air that we breath contains 21% oxygen). However, it is not this alone that increases the oxygen in your blood. Hyperbaric means increased pressure. When in a hyperbaric chamber, the air around you increases in pressure. Your … Continue reading Hyperbaric Oxygen Therapy- John Fairbrother, Concordia Clinic.