Certified Phlebotomy Technician Cpt Quiz
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A phlebotomist receives an order for therapeutic drug monitoring of digoxin levels. The specimen is collected at 8:00 AM, 12 hours after the patient's last dose. Due to laboratory workflow, the specimen sits in the automated processor queue until 11:30 AM before serum separation occurs. The separated serum is then stored at room temperature until analysis at 3:00 PM. What is the primary concern regarding specimen integrity?
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