The healthcare provider (HCP) prescribes lidocaine 4 mg/minute IV for a client experiencing premature ventricular contractions. The IV bag contains "Lidocaine 1 gram in dextrose 5% in water 500 mL. How many mL/hr should the nurse program the infusion pump to deliver? (Enter numerical value only.)
The Correct Answer is ["120"]
Here's how to calculate the rate (mL/hour) for the infusion pump to deliver lidocaine 4 mg/minute:
1. Lidocaine concentration:
The medication bag contains 1 gram of lidocaine in 500 mL of dextrose 5% in water.
Convert grams to milligrams: 1 gram = 1000 milligrams
Lidocaine concentration (mg/mL) = Total lidocaine (mg) / Volume (mL)
Lidocaine concentration (mg/mL) = 1000 mg / 500 mL
Lidocaine concentration (mg/mL) = 2 mg/mL (round to nearest whole number)
2. Prescribed lidocaine dose: 4 mg/minute (given)
3. We need to find the volume delivered per hour (mL/hour) to achieve the prescribed lidocaine dose (4 mg/minute) considering the concentration (2 mg/mL) in the bag.
Infusion rate (mL/hour) = Dose (mg/minute) x Minutes per hour / Concentration (mg/mL)
However, there's a mismatch in units between dose (mg/minute) and concentration (mg/mL).
To address this, we can convert the infusion duration (minutes) to hours to match the concentration units (mg/mL).
Conversion factor: 60 minutes/hour
Infusion rate (mL/hour) = Dose (mg/minute) x (60 minutes/hour) / Concentration (mg/mL)
Infusion rate (mL/hour) = 4 mg/minute * 60 minutes/hour / 2 mg/mL
Infusion rate (mL/hour) = 120 mL/hour (round to nearest whole number)
Therefore, the nurse should program the infusion pump to deliver approximately 120 mL/hour.
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Related Questions
Correct Answer is ["200"]
Explanation
Here's why:
The entire dose (400 mg) is contained within the 200 mL bag.
The information doesn't suggest the bag needs to be emptied completely during the infusion.
Our goal is to deliver the 400 mg dose over the 1-hour infusion period.
Therefore, the nurse should program the infusion pump to deliver the entire volume of the bag (200 mL) containing the medication over the 1-hour timeframe.
Calculation:
Volume to deliver (mL/hr) = Total volume of bag (mL) / Infusion time (hours)
Volume to deliver (mL/hr) = 200 mL / 1 hour
Volume to deliver (mL/hr) = 200 mL/hr
Therefore, the nurse should program the infusion pump to deliver 200 mL/hr.
Correct Answer is ["0.29"]
Explanation
Here's how to calculate the volume (mL) of epoetin alfa the nurse should administer:
1. Client weight conversion:
Client weight: 126 pounds
Medication dosage is based on weight per kilogram (kg).
We need to convert the weight to kg for accurate calculation.
Conversion factor: 1 kg = 2.205 lbs
Client weight (kg) = 126 pounds / 2.205 lbs/kg
Client weight (kg) = 57.14 kg (round to nearest hundredth)
2. Epoetin alfa dosage:
Prescribed dose: 50 units/kg (given)
3. Epoetin alfa concentration:
Vial label: 10,000 Units/mL
4. We need to find the volume (mL) to administer that provides the prescribed dose (50 units/kg) based on the client's weight (57.14 kg) and the medication concentration (10,000 Units/mL).
Calculation:
Total epoetin alfa dose (units): Dose (units/kg) x Client weight (kg)
Total epoetin alfa dose (units): 50 units/kg * 57.14 kg
Total epoetin alfa dose (units): 2857 units (round to nearest whole number)
Volume to administer (mL): Total dose (units) / Concentration (units/mL)
Volume to administer (mL): 2857 units / 10,000 Units/mL
Volume to administer (mL): 0.2857 mL (round to nearest hundredth as requested)
Therefore, the nurse should administer approximately 0.29 mL of epoetin alfa subcutaneously.
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