What is the preferred long-term access for hemodialysis and why?

• A. Tunneled catheter
• B. Central venous catheter
• C. Arteriovenous fistula
• D. Arteriovenous graft

Answer: (C)

For long-term hemodialysis access, creating an arteriovenous fistula is preferred because it uses the patient’s own vessels to provide durable, high-flow access with the lowest risk of infection and the longest patency. Surgically connecting an artery to a vein allows the vein to enlarge and strengthen over several weeks to months, so it can tolerate repeated needle cannulations for many dialysis sessions. This native connection reduces the chances of infection and thrombosis and usually requires fewer interventions over time, making it the most reliable option for ongoing dialysis.

Keep in mind that a fistula needs time to mature before it can be used. If dialysis is needed urgently, a temporary access like a catheter may be used as a bridge until the fistula matures. Central venous catheters and arteriovenous grafts are quicker to access but carry higher infection rates and lower long-term patency, with grafts also needing more frequent interventions compared to fistulas.