Arteriovenous Fistula Development in the First 6 Weeks after Creation

Area of Science:

• Vascular Surgery
• Nephrology
• Medical Imaging

Background:

• Arteriovenous fistulas (AVFs) are crucial for hemodialysis access.
• Assessing AVF maturation early is vital for timely dialysis initiation and patient outcomes.
• Ultrasonography (US) is a key tool for evaluating AVF development.

Purpose of the Study:

• To evaluate the early anatomic development of native AVFs within the first six weeks post-creation.
• To utilize ultrasonographic (US) measurements to track AVF maturation.
• To compare the predictive accuracy of early US measurements for long-term AVF success.

Main Methods:

• A prospective, multicenter study involving 602 participants undergoing AVF creation.
• Preoperative US mapping of arteries and veins was performed.
• AVF draining vein diameter and blood flow rate were assessed postoperatively at 1 day, 2 weeks, and 6 weeks using US.

Main Results:

• Early AVF blood flow rates at 1 day often reached over 50% of the 6-week rate.
• Two-week US measurements of AVF diameter and blood flow were more accurate predictors of 6-week outcomes than 1-day measurements.
• Upper-arm AVFs generally showed higher mean diameters and flow rates compared to forearm AVFs at all time points.

Conclusions:

• Early ultrasonographic assessment of AVF maturation is feasible and informative.
• Two-week postoperative US measurements can reliably predict 6-week AVF development.
• US at 2 weeks may help identify fistulas with suboptimal maturation potential early on.