Coagulation Tests and Pathways

Which clotting factors are assessed by the Prothrombin Time (PT) test?

• Factors XII, XI, IX, and VIII

• Factors X, V, II, and VII

• Factors IX, X, and XIII

• Factors VIII, IX, and XIII

Which test is commonly used to monitor patients on warfarin therapy?

• aPTT

• PT/INR

• TT

• D-dimer

What does Thrombin Time (TT) specifically measure?

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Which of the following can cause a prolonged PT?

• Hemophilia A

• Warfarin therapy

• Heparin therapy

• Factor XIII deficiency

Which laboratory test is used to monitor unfractionated heparin therapy?

• PT

• aPTT

• TT

• Bleeding time

A patient with a deficiency in Factor VIII would most likely show which abnormality in their lab results?

• Prolonged PT

• Prolonged aPTT

• Prolonged TT

• Normal PT and aPTT

Which test evaluates the final step in the coagulation cascade?

• Conversion of fibrinogen to fibrin

• Conversion of prothrombin to thrombin

• Platelet aggregation

• Function of Factor VII

Which of the following tests is prolonged in Vitamin K deficiency?

• PT only

• aPTT only

• PT and aPTT

• TT only

The INR (International Normalized Ratio) is calculated based on which of the following tests?

• aPTT

• TT

• PT

• Bleeding time

Which pathway is mainly affected by a vitamin K deficiency?

• Intrinsic pathway

• Extrinsic pathway

• Common pathway

• Fibrinolytic pathway