Fistula maturation is generally defined with the help of the 6S rule, which includes-
The flow within the fistula is greater than 600 mL/min.
The diameter of the fistula is around 6mm.
It must be 6mm below the skin.
A minimum of 6 cm of the vein is used for cannulation.
A thorough examination of the fistula is needed after 6 weeks.