The patient was lying flat, and the affected limb was routinely disinfected and toweled. After local anesthesia, an incision was made from the original distal incision after diversion to expose the artificial vessel about 4 cm long, without separating the anastomosis out, heparin 40 mg was given intravenously, the soft tissue on the surface of the artificial vessel was separated, an incision about 1 cm long was made, first a double-lumen thrombus retrieval catheter was inserted downward into the artificial vessel to try to remove the thrombus in the distal artificial vessel and take out more mixed thrombus; the artificial vessel sprayed blood well and blocked After the thrombus is removed, a guidewire is inserted through the incision and into the distal abdominal aorta, and more mixed thrombus is removed; after the thrombus is removed, a guidewire is placed through the incision and into the proximal artificial vessel above the anastomosis, and a contrast catheter is placed along the guidewire to perform an angiogram of the artificial vessel or other related vessels to understand the obstruction of the inflow tract, proximal anastomosis, artificial vessel or other related vessels. It was found that the distal anastomosis was narrowed and there was a piece of endothelium floating in the anastomosis, which could not be removed; and the N artery distal to the distal anastomosis was sclerotic and narrowed, with the appearance of entrapment, a 4mm-8mm balloon was used to dilate the N artery at low pressure for 4 minutes, then a stent (6mm-60mm) was placed in the distal anastomosis along the guidewire, and the stent was used to press the floating piece of endothelium. The endothelial piece floating in the anastomosis was pressed with the stent, the stent distally dilated the sclerotic stenotic N artery, and then the balloon was dilated; after completion of the imaging, the stent was well dilated. After suturing the artificial school tube, the angiogram showed good visualization of the artificial vessel and the distal end. The gauze instruments were counted without errors, and the subcutaneous and skin were sutured. Intraoperative bleeding was about 200 ml. .