Prothrombin Time (PT)

Analyte [material]

Prothrombin time (PT) [P]

Reference range, target level, or decision threshold

12-16 sLD !

INR: 2.0-3.0 – target range for most patients treated with vitamin K antagonistsLD !

Interpretation of results

↑ Congenital or acquired deficiencies of fibrinogen and/or factors II, V, VII, or X due to vitamin K deficiency or treatment with vitamin K antagonists, liver disease, disseminated intravascular coagulation, hemodilution, anticoagulant interference (eg, direct thrombin or factor Xa inhibitors), high levels of unfractionated heparin

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