6b23daca_rs___Mayo_Medical_Laboratories__Procedural_Steps
[0] 9 [Impact on Testing] • Blood flow should be uninterrupted • Immediately mix collection tube containing additives by gentle inversion (end-to-end mixing 5–6 times) • Numerous inversions or vigorous shaking can cause hemolysis [Procedural Steps] 
Perform venipuncture; once blood flow begins, request the patient to open his/her hand
Communiqué - Preanalytic Laboratory Errors - Mayo Medical Laboratories
Procedural Steps