What is Vein Mapping?

Vein mapping is a painless, non-invasive ultrasound exam that creates a detailed image of the veins in your arms. It helps your care team determine which veins are suitable for creating a hemodialysis access, such as a fistula or graft.

Vein Mapping by Carolina Nephrology

When to Schedule Vein Mapping

Your provider may recommend this test if:

  • You are approaching the need for dialysis
  • You’ve had previous access complications
  • You’re planning surgery to place a fistula or graft

What to Expect

  • The test is performed in our vascular lab
  • No needles, dyes, or radiation involved
  • Takes about 30–45 minutes
  • A technician applies gel and moves a small device over your arm to visualize your veins

After the Exam

  • Results are reviewed by your vascular specialist
  • Recommendations are shared with your nephrologist and surgical team
  • Next steps are discussed during your follow-up appointment

Why is Vein Mapping Important?

  • Identifies the best vein for creating long lasting access
  • Helps avoid unnecessary surgeries or complications
  • Ensures personalized, effective dialysis planning
  • Often required prior to AV fistula or graft placement