How long after surgery fistula?

Autogenous fistula arteriovenous fistula waiting period "mature", ie vein dilation, the vein wall thickening can puncture hemodialysis, which normally takes 4-8 weeks after surgery. Artificial arteriovenous fistula theoretically do not have to wait after vascular "mature", can puncture immediately, but often local swelling after surgery, and can not find out the artificial blood vessels running yet healed, and artificial blood vessels and surrounding tissue, hematoma puncture prone and secondary infection, the impact of the use of the fistula, therefore, generally in January after use