index finger dorsal island flap transplantation

The blood supply to the dorsal skin of the second metacarpal is mainly the first dorsal metacarpal artery. The artery is equivalent to the intersection of the lateral edge of the long extensor muscle of the thumb and the lateral edge of the second metacarpal iliac crest. The distal end of the metacarpophalangeal joint and the dorsal humerus of the proximal phalanx are in agreement with the dorsal branch of the finger pterygopalatine. The dorsal artery network. Treating diseases: hand trauma Indication Repair of the thumb finger end, the dorsal side of the palm and the skin defect of the tiger's mouth. Surgical procedure Flap cutting range: the proximal end of the extensor tendon of the thumb and the second metacarpal joint, the distal end of the proximal interphalangeal joint, both sides of the midline. According to the skin defect area of the wound, a smear was made, and the incision was designed in the range of the back flap of the index finger; an "S"-shaped incision was made on the dorsal side of the second metacarpal, and the dorsal metacarpal vein of the second metacarpal side was exposed. The nerve and its deep first dorsal metacarpal artery, with the first dorsal metacarpal artery as the axis, make a fascia pedicle with a width of 1 to 1.5 cm, so that the accompanying vein and nerve are included, in the first dorsal bone. In the superficial muscle, the blood vessels in the fascia pedicle are picked up together, and then the flap is lifted along the incision on the back of the finger, so that the flap and the fascia pedicle are freed to the proximal end until the junction of the long extensor tendon and the second metacarpal. In the wound and the fascia pedicle, a wide tunnel under the skin is made, and the flap is guided to the wound surface through the tunnel, and the flap is sutured with the wound edge. The back side of the index finger was wrapped with a medium-thick or full-thickness skin graft.

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