LAUSR

Supplemental Digital Content is available in the text Abstract The pre-expanded medial arm flap provides suitable skin for the resurfacing of a periorbital or perioral defect. However, the flap must be intraoperatively split to imitate the appearance of the oral or ophthalmic fissure, which can compromise flap perfusion. This study aimed to evaluate the safety and effectiveness of splitting pre-expanded medial arm flaps with the aid of indocyanine green angiography. All 8 patients underwent periorbital or perioral soft tissue reconstruction using a split pre-expanded medial arm flap. Flap splitting was aided by indocyanine green angiography. It was used during 2 stages of the procedure, tissue expander placement and flap transfer. The pedicle was divided 3 weeks later, and the flaps were used to resurface the defect. The distal portion of the flap was split into a fishmouth pattern in 5 patients and a window pattern in 3 patients. The donor sites were closed directly or by using a latissimus dorsi myocutaneous flap. There were no perioperative complications or flap necrosis. A pre-expanded split medial arm flap could be an option for the reconstruction of periorbital and perioral defects. With the assistance of indocyanine green angiography, vessel distribution and distal flap perfusion can be reliably evaluated, facilitating the safe splitting of the flap for the reconstruction of defects.