Pure perforator free sensory proximal ulnar artery perforator flap for resurfacing hand defects.

Objective This prospective study was performed to investigate the distribution of proximal ulnar artery perforating vessels through three-dimensional blood vessel reconstruction and examine the presence and consistency of the perforating vessels intraoperatively. Methods For anatomical guidance, three-dimensional blood vessel reconstruction was performed to determine the consistent presence of perforating vessels in the proximal ulnar artery. A free proximal ulnar artery perforator flap was then transferred in 17 patients to resurface skin defects on the hands. Color Doppler ultrasound was used to identify and mark the perforating vessels. Intraoperative evaluation was conducted to check for anastomosis of the perforating vessels at the marked sites and assess the vessel anastomosis conditions. Results No vascular crisis, flap necrosis, or wound infection occurred after surgery in 15 patients. Postoperative follow-up was conducted for 6 to 36 months. The appearance of the flap was satisfactory, the texture of the flap was soft, sensation was well restored, and hand function was not limited. The mean two-point discrimination of the flap was 7.6 +/- 2.2 mm. Conclusions Free sensory proximal ulnar artery perforator flap transfer is a safe and reliable surgical technique with respect to restoration of both the appearance and sensory function of the hand.