Ober–Yount procedure. Release of the iliotibial band of fascia that runs from the hip to the knee in patients with contracted fascia who are wheelchair bound; incisions are made in the fascia at the hip and at the knee to release the tension
O’Connor operation. Strabisus surgery in which a stitch is placed in the lateral rectus muscle to allow for postsurgical lengthening of muscle, if necessary.
Ollier–Thiersch graft. A thin, split-thickness skin graft; also called Thiersch graft.
Olshausen suspension. Shortening of the round ligaments to elevate the uterus.
Orringer procedure. Esophagectomy with proximal stomach brought through the diaphragm to be anastomosed to remaining esophagus; requires both neck and abdominal incisions