A nurse is preparing to administer verapamil 0.1 mg/kg via intermittent IV bolus over 2 min.
Available is verapamil 2.5 mg/mL. The client weighs 165 Ib. How many mL should the nurse administer?
The Correct Answer is ["3"]
Step 1 is: Convert client weight from pounds to kilograms. 165 Ib ÷ 2.2 Ib/kg = 75 kg.
Step 2 is: Calculate the total dose of verapamil needed. 0.1 mg/kg × 75 kg = 7.5 mg.
Step 3 is: Calculate the volume to administer in mL. 7.5 mg ÷ (2.5 mg/mL) = 3 mL. The nurse should administer 3 mL.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Acyclovir is primarily excreted renally, and its metabolism can lead to crystal formation in the renal tubules, particularly if the client is dehydrated or the infusion is too rapid. Monitoring for an increase in creatinine (normal range 0.6-1.2 mg/dL) is crucial as it indicates decreased glomerular filtration rate and potential nephrotoxicity or acute kidney injury, necessitating dose adjustment or hydration.
Choice B rationale
Administering oxygen prophylactically is not a standard or scientifically indicated action for acyclovir administration. Acyclovir does not inherently cause respiratory depression or compromise oxygenation. Its primary adverse effects are typically related to renal function, central nervous system, or gastrointestinal system, not respiratory compromise.
Choice C rationale
While some antiviral medications can affect hematopoiesis, acyclovir is not commonly associated with significant decreases in hemoglobin (normal range 12-18 g/dL) and hematocrit (normal range 37-52%). These parameters are generally monitored in clients with pre-existing hematological conditions or those on long-term, high-dose therapy, but it's not a primary immediate concern for IV administration.
Choice D rationale
Administering acyclovir IV over 30 minutes is the recommended infusion duration. Rapid intravenous infusion can increase the risk of renal tubular damage and crystal formation, leading to nephrotoxicity. A slower infusion rate allows for proper dilution and minimizes the concentration of the drug in the renal tubules, thus protecting kidney function and reducing adverse effects.
Correct Answer is ["200"]
Explanation
Step 1 is to determine the total volume to be infused, which is 100 mL.
Step 2 is to determine the infusion time in hours. The infusion time is 30 min, which is 0.5 hours.
Step 3 is to calculate the infusion rate in mL/hr by dividing the total volume by the infusion time in hours: 100 mL ÷ 0.5 hr = 200 mL/hr. The nurse should set the IV infusion pump to deliver 200 mL/hr.
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