Using ultrasound always determine from 2 - 4 perforators in the upper triangle, the rate of the dissectible perforators compared to the expected result in ultrasound is 78%, the actual rate of perforator compared to expected result in ultrasound is 48%, the average number of perforators is 1.6 branches/71.5 cm2, the flap is used in the rotation, the most common complication is partial necrosis, account for 3 cases.