If your kidneys fail, unless and until you have a successful kidney transplant, you will need dialysis therapy to clean and filter your blood. The first step is establishing dialysis access.

An AV fistula—taking a piece of a vein from your arm or leg and sewing it into a nearby artery, and allowing the sewn-in vein to enlarge and become thicker, like an artery. Considered the best option because it has the lowest risk of infection.

When your kidneys fail, your body is unable to clean and filter your blood. Electrolyte levels, such as potassium and phosphorous, can become dangerously high. When kidney function falls below a certain threshold dialysis is needed.

Here are the steps for creating an AV fistula or AV graft (the most common procedures), usually involving your non-dominant arm: 

ASSESSMENT  

• Your dialysis access surgeon will explain the procedure and perform a physical exam, focusing on the arm or leg selected.
• Usually, an ultrasound scan is used to “map” your veins to see if they are large enough for an AV fistula. If not, an AV graft will be needed. 

ANESTHESIA  

A variety of anesthesia techniques can be used:  

• Local anesthesia—numbing medication given by injection at the fistula or graft site, often along with sedation medication given through an IV.  
• A regional block—numbing the nerves so that your entire arm or leg “sleeps.” 
• General anesthesia—usually involves sedation medication given through an IV, sometimes along with gas that you breathe from a mask, and often includes placing a tube into your throat to make sure you breathe properly. 

PROCEDURE 

• In the operating room, your arm or leg is cleansed with an antiseptic solution and sterile drapes are placed around it.  
• An incision is made between the artery and vein, and the vessels to be joined are prepared.  
• If creating a fistula, your surgeon may divide the vein and sew one end to the side of the artery, or may sew the two vessels side-to-side without dividing the vein.  
• If a graft will be placed, your surgeon will sew it between the artery and vein. 
• The incision in your arm or leg will be closed and a sterile dressing will be applied.