71. A nurse should evaluate the effects of coumadin, used in the treatment of deep vein thrombosis, by looking at the results of which laboratory tests?
71. A nurse should evaluate the effects of coumadin, used in the treatment of deep vein thrombosis, by looking at the results of which laboratory tests?
. Prothrombin time (PT).
. Lee-White clotting time.
. Partial thromboplastin time (PTT).
. Fibrinogen clotting time (FCT).
Test-Taking Tip
Know the differences between coumadin and heparin with regard to indications of effectiveness and monitoring of therapeutic level.
Content Area: Adult Health, Vascular; Integrated Process: Nursing Process, Analysis; Cognitive Level: Application; Client Need/Subneed: Physiological Integrity/Reduction of Risk Potential/Laboratory Values
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Answer 1 is correct because the PT is the specific test to determine the effectiveness of Coumadin therapy. Answer 2 is incorrect because the Lee-White clotting time monitors heparin therapy, but has been replaced by other tests. Answer 3 is incorrect because the PTT is the appropriate test to determine the effectiveness of heparin therapy. Answer 4 is incorrect because FCT is a measure of thrombin activity, and heparin prolongs the time.