1, arteriovenous endovascular fistula can generally be used within 6 to 8 weeks after surgery, and can be used earlier in emergencies. Patients should pay special attention to not exerting force on the limb on the side of the fistula at the early stage of use, and not to lift heavy objects. Intravenous fistulae are usually used within 6 to 8 weeks after surgery, and can be used earlier in emergencies. Patients should pay special attention to not exerting force or lifting heavy objects on the fistula side during the initial period of use. 2. After dialysis with an endovascular fistula, a hemostatic patch is applied to the needle opening and then a gauze ball is used to stop the bleeding. The patient removes the gauze ball between 20 and 30 minutes after the needle is removed. If there is still bleeding after removal of the gauze ball: if the puncture needle is bleeding and blood is seeping under the skin to form a local hematoma, continue to apply gentle pressure with the gauze ball until there is no bleeding or the hematoma no longer increases in size. The pressure should be strong enough not to bleed and to feel the vibrations of the blood vessels before and after the endovascular puncture. The hemostatic patch that is attached to the needle is usually removed 24 hours after the needle is removed. If the patch has blood or is wet, it should be replaced promptly. It is recommended to touch the fistula with your hand at least 3 times a day to determine whether it is open or not. If the fistula is open, the blood flow is sufficient and you can hear the vascular murmur with your ear, and there is a sense of vascular vibration when you touch it. 4. If you find that the vibration of the blood vessels is weakened or disappears when you touch the fistula, it is recommended that you contact the doctor in charge as soon as possible. If signs of sclerosis of the internal fistula vessels are found, it is recommended to apply external slices of potatoes to the sclerotic vessel segment, but avoiding the puncture needle opening, three times a day for 20-30 minutes each time. The method should be used only after 24 hours. 5. If a local hematoma of the endovascular fistula is found, gauze soaked in saffron alcohol can be used to dress the hematoma, and the gauze should be kept moist all the time, and it is recommended to apply it 3 times a day for 30 minutes each time. The method should be used only 24 hours after the needle is removed. If Xanax is applied topically, it can be applied to the swollen area 4 hours after needle extraction, but not to the puncture opening.