What should a phlebotomist do to avoid the risk of backflow of an anticoagulant from a blood vacuum tube into the patient's circulation during blood collection by venipuncture?

What will be an ideal response?

Answer: The phlebotomist needs to place the patient's arm in a downward position and the tube stopper (top) in the uppermost position to avoid the risk of backflow of an anticoagulant from a blood vacuum tube into the patient's circulation during venipuncture.