After successful anesthesia, the operative field was routinely disinfected and toweled. An 8-cm-long longitudinal incision was made on the upper medial side of the knee, and the N artery was dissected under the quadriceps muscle, and a vessel loop was preset. The outflow tract was judged to be okay, and an end-lateral anastomosis of the artificial vessel to the N artery was proposed. A longitudinal incision of 5 cm was taken below the left groin along the course of the femoral artery, and the common femoral artery, superficial femoral and deep femoral arteries were dissected out layer by layer, and a vascular block (vesselloop) was preplaced; 40 mg of heparin was administered intravenously. The artificial vessel was trimmed and an end-lateral anastomosis (continuous external suture) was performed from the artificial vessel (GORE-TEX) to the N artery with a Gore CV7 vascular fusion line; the artificial vessel used was 8 mm in diameter with an external support ring. The artificial vessel was introduced into the inferior inguinal incision from the superior knee incision with a tunneling device. The common femoral artery was blocked, and the longitudinal incision was made, and the dilated vessel was seen to be about 1.2 cm in diameter and filled with thrombus. The thrombus was removed, the proximal blood spray was good, the lumen was flushed, and the artificial vessel was trimmed. Open the deep femoral and common femoral arteries before opening the artificial vessel and N artery, and the anastomosis is good with distal arterial pulsation. After complete hemostasis, the incision was closed layer by layer after counting the gauze and instruments. The operation went smoothly and there was not much intraoperative bleeding.