In order to dialyze, a connection between your body and the dialysis system is required. This article describes AV fistula, graft, central venous catheter and PD catheter in more detail.
The AV fistula (=shunt) is the most common and also preferred vascular access for hemodialysis.
A dialysis shunt is typically required to perform dialysis. This article explains exactly what a dialysis shunt is and how you can best care for it so that it lasts a long time.