66. Which of the following methods should a phlebotomist use to invert tubes to prevent clotting?
Answer: C
Rolling the tubes between the palms of the hands 4 to 8 times after collection is the correct method.
This technique helps to gently mix the blood with the additives in the tubes, thereby preventing clotting effectively.
A) Shaking the tubes 4 to 8 × after collection
Shaking the tubes can introduce air bubbles and may lead to hemolysis of the blood samples, which can compromise the integrity of the results. This method is not recommended for mixing blood samples in phlebotomy.
B) Moving the tubes in a figure-eight motion 4 to 8 × after collection
While a figure-eight motion might seem effective, it can be less efficient for mixing compared to rolling. This method may not adequately ensure that the blood is mixed thoroughly with the additives in the tubes.
C) Rolling the tubes between the palms of the hands 4 to 8 × after collection
This method is the recommended practice because it provides a gentle and thorough mixing of the blood with the tube additives, ensuring proper anticoagulation and preventing clot formation.
D) Passing the tubes from hand to hand 4 to 8 × after collection
Passing the tubes from hand to hand does not provide adequate mixing of the blood and additives. This method may not sufficiently prevent clotting, as it lacks the necessary contact and motion to effectively mix the components.
Conclusion
The method of rolling the tubes between the palms of the hands is the most effective way to prevent clotting by ensuring proper mixing of the blood with the additives. Other methods either risk damaging the sample or fail to provide adequate mixing, making them inappropriate choices for phlebotomy practices.