Which of the following should be performed if an evacuated tube contains a clot activator?

Question

Quizplus · Accepted Answer

Gently inverting the tube five times after drawing it will ensure proper mixing of the clot activator with the blood. This is necessary to prevent clotting of the blood sample within the tube. Pushing the posterior needle through the tube stopper is not necessary if the tube is properly filled and there is no resistance during the draw. Filling the tube only one-half full with blood may affect the ratio of blood to clot activator, leading to inaccurate test results. Centrifuging the tube immediately after drawing it may also affect test results, as the clot activator needs time to properly mix with the blood sample before the sample is separated from the serum or plasma.

Which of the Following Should Be Performed If an Evacuated