The healthcare provider prescribes dobutamine 6 mcg/kg/min IV for a client who weighs 140 pounds. The IV bag contains dobutamine 250 mg in 250 mL dextrose 5% in water (DW). How many mL/hr should the nurse program the infusion pump to deliver? (Enter numeric value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["22.9"]
First, let’s convert the client’s weight from pounds to kilograms since the dosage is prescribed in mcg/kg/min. We know that 1 kg is approximately 2.2 lbs. So,
Weight in kg = 140 lbs/2.2 ≈ 63.64 kg
The prescribed dose is 6 mcg/kg/min. Therefore, the total dose for this client per minute would be:
Dose per minute=6 mcg/kg/min×63.64 kg = 381.84 mcg/min
We need to convert this to mcg/hr since we want the rate in mL/hr and our final concentration is in mcg/mL. There are 60 minutes in an hour, so:
Dose per hour = 381.84 mcg/min×60 = 22910.4 mcg/hr
The IV bag contains 250 mg of dobutamine in 250 mL of solution. This is equivalent to 250,000 mcg in 250 mL, or 1000 mcg/mL.
Finally, we can find the rate in mL/hr by dividing the dose per hour by the concentration:
Rate in mL/hr = 22910.4 mcg/hr / 1000 mcg/mL = 22.91 mL/hr
If rounding is required to the nearest tenth, the nurse should program the infusion pump to deliver 22.9 mL/hr.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1.8"]
Explanation
Here's how to calculate the volume (mL) of diazepam the nurse should administer:
Calculate the total dose of diazepam for the child:
Dose per kg: 0.3 mg/kg (given)
Child's weight: 30 kg (given)
Total dose (mg) = Dose per kg (mg/kg) x Child's weight (kg)
Total dose (mg) = 0.3 mg/kg * 30 kg
Total dose (mg) = 9 mg (round to nearest whole number)
Concentration of the medication:
The medication is available in 5 mg/mL vials (given).
Calculate the volume to administer:
Volume to administer (mL) = Total dose (mg) / Concentration (mg/mL)
Volume to administer (mL) = 9 mg / 5 mg/mL
Volume to administer (mL) = 1.8 mL (round to nearest tenth)
Therefore, the nurse should administer approximately 1.8 mL of diazepam intravenously.
Correct Answer is ["0.9"]
Explanation
Here's how to calculate the total volume the nurse should administer for the combined medication:
1. Calculate the volume of hydromorphone:
Dose: 4 mg
Concentration: 10 mg/mL (from ampule label)
Volume (mL) for hydromorphone = Dose (mg) / Concentration (mg/mL)
Volume (mL) for hydromorphone = 4 mg / 10 mg/mL
Volume (mL) for hydromorphone = 0.4 mL
2. Calculate the volume of hydroxyzine:
Dose: 25 mg
Concentration: 50 mg/mL (from vial label)
Volume (mL) for hydroxyzine = Dose (mg) / Concentration (mg/mL)
Volume (mL) for hydroxyzine = 25 mg / 50 mg/mL
Volume (mL) for hydroxyzine = 0.5 mL
3. Add the volumes for each medication to find the total volume:
Total volume = Volume (mL) for hydromorphone + Volume (mL) for hydroxyzine
Total volume = 0.4 mL + 0.5 mL
Total volume = 0.9 mL (round to nearest tenth as requested)
Therefore, the nurse should administer a total of 0.9 mL.
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