Arteriovenous Fistula (AVF)
Arteriovenous fistulae are created by vascular surgeons to allow a patient to undergo kidney dialysis. During the operation an artery (usually in the forearm) will be joined to a vein to create a very high flow vessel.
Duplex ultrasound is used to assess the quality of the arteries and veins of the arm using ultrasound prior to AVF surgery. This helps the surgeon in planning the best site to place the fistula.
Additionally, if there are any problems with dialysis, duplex ultrasound is used to check the AVF for any narrowing ("stenosis") or blockage ("occlusion").