A client receives a prescription for warfarin sodium 2 mg IM daily. The pharmacy delivers a vial labeled, "Warfarin sodium 5 mg/single-use vial. The instructions read, "Reconstitute with 2.7 mL of sterile water for injection to yield 2 mg/mL. How many mL should the nurse administer? (Enter the numerical value only.)
The Correct Answer is ["1"]
Desired dose = 2 mg
Available concentration after reconstitution = 2 mg/mL
Calculate the volume to administer:
Volume to administer (mL) = Desired dose (mg) / Available concentration (mg/mL)
= 2 mg / 2 mg/mL
= 1 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["20"]
Explanation
Determine the concentration of heparin in the IV solution:
Heparin concentration (units/mL) = Total heparin units / Total volume of solution (mL)
= 25,000 units / 500 mL
= 50 units/mL
Calculate the new infusion rate in mL/hour based on the new prescribed heparin dose:
New infusion rate (mL/hour) = Desired heparin dose (units/hour) / Heparin concentration (units/mL)
= 1,000 units/hour / 50 units/mL
= 20 mL/hour
Correct Answer is ["3"]
Explanation
Prescribed dose = 15 mg
Available dose per tablet = 5 mg/tablet
Calculate the number of tablets to administer:
Number of tablets = Prescribed dose / Available dose per tablet
= 15 mg / 5 mg/tablet
= 3 tablets
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