CPT® Code 20972

A free osteocutaneous flap is a surgical procedure utilized to repair complex defects involving both soft tissue and bone. This technique is particularly important in reconstructive surgery, where the goal is to restore both the functional and aesthetic aspects of the affected area. The procedure involves the careful harvesting of a flap that includes skin, subcutaneous tissue, and bone from a donor site, which is then transferred to the site of the defect. The specific details of the procedure can vary based on the location of the defect and the chosen donor site. During the operation, the dimensions of the defect are measured to ensure that the harvested flap will adequately cover and fill the area. The incision lines are meticulously marked on the skin at the donor site, and the skin is incised and dissected to preserve the vascular pedicle, which is crucial for maintaining blood supply to the flap. The underlying muscle and nerves are also preserved to enhance the viability of the flap. Once the bone is exposed, the necessary amount is harvested while ensuring that its vascular supply remains intact. After the flap is severed from the donor site, it is transferred to the recipient site where the bone is positioned into the defect and secured. The vascular structures of the flap are then anastomosed to the recipient's blood vessels using microvascular techniques, ensuring proper blood flow. Finally, the skin portion of the flap is secured in place, and the donor site may be closed with sutures or, if necessary, a separate skin graft may be applied. This procedure is essential for restoring function and appearance in areas affected by trauma, disease, or congenital defects.