
998 Section XII • Vascular
STEP 3: OPERATIVE STEPS—ARTERIOVENOUS GRAFTS
1. APPROACH AND INCISION
◆ Although primary arteriovenous fi stulae are preferred, some patients do not have adequate
veins to allow fi stula creation. In these cases, artifi cial conduit, most commonly standard
wall 6-mm polytetrafl uoroethylene (PTFE), is used. Occasionally, more distal PTFE grafts
can bridge to later arteriovenous fi stula creation by arterializing the downstream vein.
◆ Incisions are made according to the target vessels. Grafts may be placed in a looped,
curved, or straight confi guration, based on the availability of arterial infl ow and venous
outfl ow, as well as the anatomic position and future ease of access at the dialysis center.
Again, the principle of distal placement is followed. Grafts that cross joints or have a sharp
turn (e.g., a forearm hairpin turn) may require a short segment of ringed graft. Femoral
grafts are avoided if possible, because they may interfere with future kidney transplant
(Figures 90-17 through 90-21).