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.