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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1"]
Explanation
Here's the breakdown:
Prescribed dose: 2 mg midazolam (given)
Vial concentration: 4 mg/2 mL (label)
We need to find the volume containing the 2 mg dose considering the concentration.
Calculation:
Volume (mL) = Dose (mg) / (Concentration (mg/mL) / 2)
We divide the concentration by 2 because we need the volume that delivers 2 mg (half the concentration).
Volume (mL) = 2 mg / (4 mg/mL / 2)
Volume (mL) = 2 mg / 2 mg/mL
Volume (mL) = 1 mL
Therefore, the nurse should administer 1 mL of midazolam to deliver the prescribed dose of 2 mg.
Correct Answer is ["168"]
Explanation
here's how to calculate the total zidovudine dosage the nurse should prepare for the client:
Client weight conversion:
Client weight: 185 lbs
Medication dosage is based on weight per kilogram (kg). Therefore, we need to convert the weight to kg for accurate calculation.
Conversion factor: 1 kg = 2.205 lbs
Client weight (kg) = 185 lbs / 2.205 lbs/kg
Client weight (kg) = 84.0 kg (round to nearest tenth)
Prescribed zidovudine dose per kilogram:
Dose per kg: 2 mg/kg (given)
Calculate the total zidovudine dosage (mg) for the client:
Total dose (mg) = Dose per kg (mg/kg) x Client weight (kg)
Total dose (mg) = 2 mg/kg * 84.0 kg
Total dose (mg) = 168 mg (round to nearest whole number)
Therefore, the nurse should prepare approximately 168 mg of zidovudine for the client.
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