What is Hyperbaric Oxygen?
Hyperbaric oxygen therapy (HBOT) is breathing 100% oxygen while pressurized greater than one atmosphere (one atmosphere is the pressure at sea level). HBOT systematically delivers oxygen in high concentrations resulting in the substantial increase of tissue oxygenation.
History
Accounts of increased atmosphere pressures used on humans date to the fifth century BC. A British clergyman named Henshaw, built the first sealed chamber in 1662.