Certified Clinical Medical Assistant Exam Practice Question
Which of the following actions should a medical assistant take when an evacuated tube contains sodium citrate?
Correct Answer: C
Rationale: When an evacuated tube contains sodium citrate, it acts as an anticoagulant, preserving the blood sample for accurate testing. Gently inverting the tube 3 to 4 times after drawing ensures proper mixing of the blood with the anticoagulant, preventing clot formation.
Option A is incorrect; pushing the needle through the stopper can lead to contamination or improper blood flow. Option B is also wrong; filling the tube only halfway compromises the sample's integrity and may lead to inaccurate results. Option D is not advisable, as centrifuging immediately can cause clotting before proper mixing occurs.
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