Dorsal vascular network of the first web space. Anatomical bases of the kite flap.

Thirty dissections were performed on adult non embalmed cadavers, after vascular injection with MICROFIL or Methylene blue. In contrast to the classical descriptions of a single dorsal metacarpal artery, this study shows the existence of a vascular network with 1 or 2 vessels running over or under the deep aponeurosis. Direct cutaneous arteries provide blood supply to the kite flap when the only dorsal metacarpal vessel of the first web space is in a deep situation. The main source of blood supply to the kite flap is described in each anatomical variation of the dorsal network.