What is the recommended distance between needle tips during AVF/AVG cannulation?

The recommended distance between needle tips during arteriovenous fistula (AVF) or arteriovenous graft (AVG) cannulation is at least 1.5 inches. This guideline is crucial for several reasons.

A distance of 1.5 inches allows for proper blood flow between the two needles, ensuring each needle can draw or return blood efficiently without causing turbulence or compromising the access site. This spacing also minimizes the risk of damaging the blood vessels or creating unnecessary trauma, which could lead to complications like clotting or hematoma formation.

Maintaining this recommended distance is an essential practice that promotes patient safety and the long-term viability of the vascular access. It helps in achieving optimal hemodialysis performance and preserving the access site for future treatments.