For hyperbaric oxygen therapy, the affected person lies down on a stretcher that slides into an acrylic tube about 7 ft (2.1 m) long and 25 in. (64 cm) across. The pressure inside the tube is raised, and 100% oxygen is delivered under high pressure. Each treatment session lasts about 90 minutes. After treatment, the chamber is depressurized slowly while the person rests inside.
Providence Hyperbaric Medicine program
, based at Providence Portland Medical Center, is Oregon's only 24-hour hospital-based hyperbaric service.