After successful anesthesia, the patient was placed in prone position and routinely disinfected and toweled. An “S”-shaped incision was made in the N fossa of the left lower extremity, about 10 cm long, and the skin and subcutis were incised layer by layer, and the fatty tissue in the middle of the N fossa was separated to find the N artery, which was not pulsating. The distal N artery was not pulsating and was hard, and the distal superficial femoral artery was palpable; a vascular blocking tape was applied. Intraoperatively, a few fibrous adhesions were seen between the outer membrane of the N artery and the vascular nerve sheath, and the fibrous tissue was separated. Heparin 40 mg was given intravenously, an incision of about 1.5 cm in length was made at the distal end of the N artery, and the Fogarty 4 and 3 embolization catheters were used to remove the embolus distally, respectively, to remove the old thrombus, which was about 6 cm long, and repeatedly until no thrombus could be removed, with good blood return, the distal end was injected with heparin saline to block the distal N artery, and then the proximal N artery was embolized, and the old thrombus, which was about 3 cm long, was also removed proximally. After the N artery incision was flushed, the incision was closed with 6-0 Prolene sutures with continuous external sutures, and 5% sodium bicarbonate 250 ml was given intravenously. no significant bleeding was observed in the incision, and the gauze instruments were counted correctly, and the incision was closed layer by layer. Intraoperative bleeding was low. The patient’s status was stable.