Clinical effects of homodigital dorsal branch of the proper digital artery flap on repairing soft tissue defects of fingers.

Homodigital dorsal branch of proper digital artery flaps (HDBPDAF) have been proved to be an excellent alternative for repairing distal soft tissue defects of fingertip. This study was to evaluate the clinical effects of HDBPDAF on repairing various soft tissue defects of fingers, including thumb and multi-fingers defects. A retrospective study was conducted in 40 patients with 44 finger defects treated with HDBPDAF from August of 2014 to December of 2021. The defects were located on fingertip and finger pulp (n = 28), finger pulp (n = 10), and dorsum of fingers (n = 6) with bone, tendon or nerve exposed. The average size of the flaps was 1.9 × 3.9 cm. Semmes Weinstein monofilament (SWM) test, Static two-point discrimination (2-PD), Total active motion (TAM) scores, the mean Disabilities of the Arm, Shoulder, and Hand (DASH) score were evaluated through long-term follow-up. Forty-two flaps survived completely and uneventfully. Partial flap necrosis was observed in two flaps because of the absence of dorsal branch of proper digital artery. No visible scar contracture and joint limitation were noticed. The mean SWM score of flaps was 4.11 ± 0.4 g. The average 2-PD of the flaps was 8.9 ± 0.9 mm. The mean TAM of injured fingers was 268.7 ± 5.2° (contralateral side: 283.2 ± 6.4°, p < 0.05). The mean DASH score value was 29.7 ± 7.9. The HDBPDAF was an optimal and reliable alternative to repair various distal soft tissue defects of fingers, despite a lower absent rate of dorsal branch.