Answer
A fistula (AVF) is a permanent vascular access created by surgically joining an artery and a vein in your arm. It takes a few weeks to mature; in the long term it is the healthiest method with the lowest risk of infection.
A catheter (CVC), on the other hand, is a temporary access placed in a large vein in the neck or chest that can be used immediately. It is preferred in emergencies or until a fistula matures.
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