Select the single answer below that correctly fills in the names of the coagulation tests described. The __________________test is performed to monitor patients on Coumadin therapy, and the _________________test is performed to monitor patients on Heparin therapy:

Question

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The prothrombin time (PT) test is used to monitor patients on Coumadin therapy, as it measures the activity of factors II, V, VII, and X, which are affected by Coumadin. The activated partial thromboplastin time (APTT or PTT) test is used to monitor patients on Heparin therapy, as it measures the activity of factors II, V, VIII, IX, X, XI, and XII, which are affected by Heparin. Choice A (FDP/PT) refers to a test that measures fibrin degradation products and prothrombin time, but it is not specific to monitoring patients on Coumadin or Heparin therapy. Choice B (PT/fibrinogen) refers to a test that measures prothrombin time and the amount of fibrinogen in the blood, but it does not specifically monitor patients on Coumadin or Heparin therapy. Choice D (BT/plt) refers to tests that measure bleeding time and platelet count, but they do not specifically monitor patients on Coumadin or Heparin therapy.

Select the Single Answer Below That Correctly Fills in the Names