Study to Determine if Hyperbaric Oxygen Therapy is Helpful for Treating Radiation Tissue Injuries

The principle objective of this research is to more precisely determine the degree of benefit that hyperbaric oxygen therapy affords in the treatment of late radiation tissue injury. The study has eight\* components. Seven involve the evaluation of established radionecrosis at varying anatomic sites (mandible, larynx, skin, bladder, rectum, colon, and gyn). The eighth will investigate the potential of hyperbaric oxygen (HBO) therapy to prophylax against late radiation tissue injury. \*(One of the arms, HORTIS IV - Proctitis has been closed to further patient recruitment. This decision was based on an interim statistical analysis which generated sufficient evidence to support closing down this arm of HORTIS.)