A nurse is preparing to administer a daily dose of warfarin to a client. Which of the following laboratory values should the nurse check prior to administration?

WBC

INR

Platelets

АPTT

Answer and Explanation

The Correct Answer is B

A. WBC: White blood cell count is unrelated to warfarin therapy.
B. INR: Warfarin’s anticoagulant effect is monitored using the International Normalized Ratio (INR). A therapeutic INR range is typically 2–3 for most indications.
C. Platelets: While platelets are important for overall clotting, INR is the specific measure for warfarin.
D. APTT: Activated partial thromboplastin time (APTT) is used to monitor heparin, not warfarin.

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Free Nursing Study Resources

Correct Answer is B

Explanation

A. Inject 0.3 to 0.5 mL of the solution: The typical volume for a tuberculin skin test is 0.1 mL.
B. Select an injection site that is free of scar tissue: Scar tissue can interfere with the reading of the tuberculin skin test, so a site free of scars should be selected.
C. Hold the needle at a 30° angle during injection: The needle should be held at a 5–15° angle for intradermal injections.
D. Massage the site following the injection: Massaging the site is not recommended as it could affect the accuracy of the test.

A. Calculate the correct amount of the medication. B. Validate the prescription with the available medication. C. Document the time of the medication administration. D. Identify the client using two means of identification.

Correct Answer is D

Explanation

A. Calculate the correct amount of the medication: This is an important step but should be done after confirming the client's identity to ensure medication safety.
B. Validate the prescription with the available medication: Validating the prescription is essential, but client identification should be the priority before administering the medication.
C. Document the time of the medication administration: Documentation is done after the medication is administered, and client identification must come first.
D. Identify the client using two means of identification: This is the most critical first step to ensure the correct patient is receiving the correct medication.

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A nurse is preparing to administer a daily dose of warfarin to a client. Which of the following laboratory values should the nurse check prior to administration?

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