A client receives a prescription for warfarin 2 mg IM daily. The pharmacy delivers a vial labeled, warfarin 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 mg should the nurse administer?
(Enter the numerical value only.)
The Correct Answer is ["2"]
Volume (mL) = Dose (mg) / Concentration (mg/mL)
Substituting the values, the nurse gets:
Volume (mL) = 2 mg / 2 mg/mL
Volume (mL) = 1 mL
Therefore, the nurse should administer 1 mL of the reconstituted solution to deliver 2 mg of warfarin to the client.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["6"]
Explanation
- To calculate the infusion rate, use the formula: infusion rate (mL/h) = dose (units/h) x volume (mL) / concentration (units)
- In this case, the dose is 2 milliunits/min or 0.12 units/h
- The volume is 1000 mL and the concentration is 20 units
- Plug in the values and simplify: infusion rate = 0.12 x 1000 / 20
- The infusion rate is 6 mL/h
- The nurse should program the pump to deliver 6 mL/h
Correct Answer is ["75 "]
Explanation
- Formula: Dose (mg) = Volume (mL) x Concentration (mg/mL)
- Solution:
- Dose (mg) = 15 mL x (12.5 mg / 5 mL)
- Dose (mg) = 15 mL x 2.5 mg/mL
- Dose (mg) = 37.5 mg
- Answer: The client receives 37.5 mg of diphenhydramine every 12 hours PRN for pruritus.
The total daily dose in mg is 37.5 x 2 = 75 mg.
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