To do hemodialysis requires making vascular access to direct deep arterial blood to superficial veins so that nurses can easily administer injections and direct enough blood (high arterial blood flow) out of the body for dialysis. There are 3 types of vascular accesses made for long-term use: own blood vessels, artificial blood vessels, and tunneled deep vein catheters with polyester sleeves. First of all, of course, it is best to make a fistula from one’s own vessels, which is easy to puncture, has good blood flow, and has the lowest rate of infection and blockage. In general, 6 fistulas can be done for both upper limbs. If your own blood vessels do not work, you should not place a tube, but should first do artificial blood vessels, but domestic artificial blood vessels are expensive, inexperienced and easy to fail, so many doctors do catheters directly, so the effect of dialysis is the worst, affecting the life of the patient. Finally there is no way out before placing a tunnel catheter with a polyester sleeve, which has the highest incidence of infection and bad flow.