ATI RN
ATI N211 Pharmacology Exam I Questions
Extract:
Question 1 of 5
A nurse is caring for a client who has deep vein thrombosis and has been on heparin continuous infusion for 5 days. The provider prescribes warfarin PO without discontinuing the heparin. The client asks the nurse why both anticoagulants are necessary. Which of the following statements should the nurse make?
Correct Answer: D
Rationale: The correct answer is D: Warfarin takes several days to work, so the IV heparin will be used until the warfarin reaches a therapeutic level. Warfarin works by inhibiting the synthesis of vitamin K-dependent clotting factors, which takes time to achieve a therapeutic effect. By continuing the IV heparin, the client is protected against clot formation until the warfarin reaches its full anticoagulant effect. Option A is incorrect as heparin and warfarin do not work together to dissolve clots but have different mechanisms of action. Option B is incorrect as the provider has already prescribed warfarin without discontinuing heparin. Option C is incorrect as IV heparin does not directly increase the effects of warfarin.
Question 2 of 5
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Question 3 of 5
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Question 4 of 5
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Question 5 of 5
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