Breathing pure oxygen to save hips from collapsing

This study aims to see if adding hyperbaric oxygen therapy—breathing pure oxygen in a pressurized chamber—to a specific hip surgery helps patients with avascular necrosis (bone death due to poor blood supply) feel less pain and function better. It will involve 400 patients at Yale who have early-stage hip bone death and are candidates for a surgery that drills into the bone and injects concentrated bone marrow. The main goal is to measure changes in pain levels after the combined treatment.