Difficulty: Medium

Average Score: 67%

Which of the following methods should a phlebotomist use to invert tubes to prevent clotting?

Rationale

Rolling the tubes between the palms of the hands 4 to 8 times after collection.

This method gently mixes the blood with the anticoagulant in the tube, helping to prevent clotting while minimizing the risk of hemolysis that can occur with more aggressive movements.

A (Shaking the tubes 4 to 8 × after collection) YOUR ANSWER

Shaking the tubes can introduce too much agitation, potentially leading to hemolysis of the blood sample. This method is not recommended as it can damage red blood cells and compromise the integrity of the sample.

B (Moving the tubes in a figure-eight motion 4 to 8 × after collection) YOUR ANSWER

While this method may seem gentle, it can still create excessive turbulence within the tube, risking hemolysis. It is not the most effective way to ensure proper mixing of the anticoagulant with the blood sample.

D (Passing the tubes from hand to hand 4 to 8 × after collection) YOUR ANSWER

This method does not provide adequate mixing of the blood with the anticoagulant and may lead to uneven distribution within the tube. Simply passing the tubes back and forth does not ensure that clotting is effectively prevented.

Conclusion

For optimal prevention of clotting, rolling the tubes between the palms of the hands is the preferred method, as it achieves gentle mixing without risking damage to the blood cells. Other methods may either cause hemolysis or fail to adequately mix the sample, compromising the quality of the blood work performed. Proper technique in handling blood samples is essential for accurate laboratory results.

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