Which of the following additives is preferred when drawing blood samples to measure parathyroid hormone (PTH)? A) Acid citrate dextrose because PTH is least stable using this additive B) Potassium (3)-EDTA (K₃-EDTA) because PTH is most stable using this additive C) Sodium citrate because PTH is most stable using this additive D) Sodium fluoride/potassium oxalate because PTH will complex with oxalate to increase its stability

Question

Quizplus · Accepted Answer

Potassium EDTA (K3-EDTA) is the preferred anticoagulant for drawing blood samples for PTH measurement because it helps in preserving the stability of the hormone.

Which of the Following Additives Is Preferred When Drawing Blood