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A cross-leg flap can be used to treat severely injured lower limbs but associated with complications. Herein, we describe a technique of a parallel cross-leg free flap combined with posterior tibial artery perforator pedicle propeller cable bridge flap for the treatment of lower extremity wounds. The artery and veins of the free flap are anastomosed to the contralateral posterior tibial artery and vein, respectively. The vascular pedicle is wrapped with a posterior tibial artery perforator pedicle propeller flap. The legs are allowed to remain in a straight, relaxed position which is maintained with a bandage or Kirschner wire placed at the distal limbs. Pedicle division is performed around 21 days after flap creation, and the posterior artery is re-anastomosed and pedicled flap returned to its original position. From June 2017 to March 2020, 7 patients with lower extremity wounds and tissue loss received reconstruction with this method. The recipient vessels for all flaps were the posterior tibial artery and vein. The average operation time was 5 hours. The average time to ambulation was 4 weeks, and the average follow-up time was 13.7 months. All flaps survived, and limb salvage was successful in all patients. Patients were not uncomfortable with the limbs held in position until pedicle division, and there were no complications. At the final follow-up, the function of all limbs was normal, and the esthetic appearance was acceptable to all patients. The method described overcomes the disadvantages of traditional cross-leg flaps for the treatment.

journal of investigative surgery

Parallel Cross-Leg Free Flap with Posterior Tibial Artery Perforator Pedicle Propeller Cable Bridge Flap for the Treatment of Lower Extremity Wounds: A Case Series Report