It's based on the maximum recommended duration for a tourniquet plus the duration of a stretch. Since stretching reduces the diameter of vessels and reduces other flow channels, the addition of a tourniquet should reduce the maximum to keep all things equal (in a manner of speaking).SirKyle;460424 said:20min is what everybody does. Don't really know why.
jnuyjuikikl;486253 said:20min is what everybody does. Don't really know why.