An arteriovenous (AV) Fistula is an abnormal connection between an artery and a vein normally, blood flows from your arteries to your capillaries to your veins. Nutrients and oxygen in your blood travel from your capillaries to your veins. Nutrients and oxygen in your blood travel from your capillaries to tissues in your body. With an arteriovenous fistula, blood flows directly from the artery into a vein by passing some capillaries. Fistula needle are a crucial link between the patient and the dialysis machine. for this reason, all needles have to meet the requirements of highest quality, safety and comfort-both from the user’s as well as from the patient’s perspective