Fig. 3.

Case 1: defect on sacral area

(A) The three anticipated sites of the left superior gluteal artery perforators were marked with metal clips by using handheld Doppler. The black arrow indicates the location of the perforator with the loudest handheld Doppler signal. (B) Through the axial view of the three-dimensional computed tomography angiography of the lower extremity, we observed that the metal clip showed concordance with the perforator. The white arrow indicates the location of the perforator with the loudest handheld Doppler signal, which was denoted by black arrow in Fig. 3A. (C) During the surgery, the location of the perforator, which was denoted by the black arrow, was confirmed; it matched the location of the metal clip marking.