1, 10 days after incision removal after surgery can be local exercise to promote fistula maturation. Method: Hold a rubber grip ring in your hand 3-4 times a day for 10 minutes each time; you can also use your hand, tourniquet or blood pressure cuff above the anastomosis (e.g. upper arm) and gently apply pressure until the vein is moderately dilated and release it every 15-20 minutes, which can be repeated 3 times a day. 2.For 10 days after surgery, keep the limb on the operated side clean and avoid moisture to prevent wound infection; if you find that there is more than bleeding and pain, contact your doctor immediately for timely treatment. 3, learn how to determine whether the internal fistula is open, that is, non-surgical hand touch the vein on the side of the operation, if you feel the tremor, or hear a vascular murmur, then it suggests open. Otherwise, you should contact your doctor immediately and deal with it in time. 4, early after endovascular surgery, should try to wear cuff loose underwear, elevate the operated side of the limb to promote blood return, reduce the swelling of the limb. Avoid pressure on the affected limb, do not wear a watch, do not measure blood pressure, do not carry weight, and do not use the internal fistula for intravenous injection or infusion. 5. Give low molecular heparin sodium 3000U subcutaneously for 7 days of anticoagulation as appropriate in hypercoagulated patients.