Evacuated blood collection tubes for whole blood hematology determinations Tubes with spray-coated K2EDTA, the anticoagulant of choice in specimen collection and cell blood counting Requires eight to ten inversions for thorough mixing of blood and anticoagulant Plastic tubes offer a safer alternative to glass, are virtually break-resistant, and can be incinerated Tubes marked as Best Practice Formulary meet demanding requirements of complex diagnostic instruments and current clinical guidelines Available with conventional tube stopper or Hemogard tube closure that prevents human contact with blood on the stopper or tube rim