 Hyperbaric oxygenation chambers are FDA-approved and regulated devices. Hyperbaric oxygenation therapy HBOT is a medical procedure in which participants inspire enriched oxygen while their bodies are subjected to pressure greater than ambient barometric pressure at sea level i.e., greater than 1 atmosphere absolute, or 760 mmHg. Hyperbaric oxygen therapy elevates tissue oxygen levels, thereby increasing the rate of tissue healing, and enhancing leukocyte-mediated phagocytosis. It may also elevate growth factors, which promotes angiogenesis and healing Siddiqui, Davidson, Mustoe, 1997. 