The extended SCIP flap: An anatomical and clinical study of a new SCIP flap design.

[PURPOSE] We describe a variation of the superficial circumflex inguinal artery perforator (SCIP) flap, based the superficial branch of the superficial circumflex inguinal artery (SCIA) METHODS: The vascular supply of the SCIP flap was prospectively studied in 91 preoperative CT angiograms in patients undergoing reconstruction with other flaps, and verified randomly with a hand-held doppler in 20% of them. Based on the results, a new SCIP flap was designed medial and cranial to the anterosuperior iliac spine (ASIS) using the superficial branch of the SCIA. This flap was used in 39 patients to reconstruct lower limb and head and neck defects RESULTS: The superficial branch of the SCIA was found in all patients and its exit point through Hesselbach's fascia was located within a 21 mm-radius circumference drawn 18 mm medial and 17 mm distal to the ASIS in 90% of the patients. Reconstruction with this SCIP flap was successful in 92.3% of the patients. Complications were present in 17.9% of the patients CONCLUSIONS: The design of the SCIP flap can be displaced cranially to obtain a larger flap with a long and constant vascular pedicle that is based on the main trunk of the SCIA. This facilitates the reconstruction of large and complex three-dimensional defects that require thin and pliable tissue, such as those located in the head and neck or limbs. Furthermore, supramicrosurgical expertise is not required.

[LEVEL OF EVIDENCE] IV.