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Arteriovenous fistula. Close-up of a woman's arm, showing a radial arteriovenous fistula (AV fistula) created for dialysis. AV fistula surgery joins an artery to a vein. This makes needle insertion easier during haemodialysis. Kidney dialysis (haemodialysis) is used for those with reduced or failing kidney function. A machine is used to remove waste and excess water from the blood, a function normally served by the kidneys.
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