To assess and monitor coagulation status related to therapeutic interventions and disorders such as vitamin K deficiency.
Plasma (1 mL) collected in a completely filled blue-top (sodium citrate) tube.
(Method: Clot detection) 10 to 13 sec.
- International normalized ratio (INR) = Less than 2 for patients not receiving anticoagulation therapy, 2 to 3 for patients receiving treatment for venous thrombosis, pulmonary embolism, and valvular heart disease.
- INR = 2.5 to 3.5 for patients with mechanical heart valves and/or receiving treatment for recurrent systemic embolism.
Prothrombin Time and International Normalized Ratio has been found in Davis's Lab & Diagnostic Tests
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