Test ID: Z5514
CPT code: 85260
LOINC: 28657-5
Specimen Type: Blue (sodium citrate)
Frequency: 2 – 3 days
Instructions: 1 mL Plasma from Blue-top (sodium citrate), Frozen, platelet poor plasma. FREEZE immediately
Text: Useful in monitoring patients on vitamin K antagonist therapy where baseline PT is prolonged. Factor X deficiency should be considered when a patient with bleeding history has both extended protime (PT) and activated partial thromboplastin time (aPTT).
Methodology: Chromogenic