6b23daca_rs___Mayo_Medical_Laboratories__Procedural_Steps
[0] 6 [Impact on Testing] • Tourniquet placement should not exceed 2 minutes, which may result in hemoconcentration and erroneously increased levels of protein-based analytes, packed cell volume, and other cellular elements • Preferred site is antecubital fossa [Procedural Steps] 
Apply tourniquet and select the venipuncture site and vein
Communiqué - Preanalytic Laboratory Errors - Mayo Medical Laboratories
Procedural Steps