A nurse is preparing to administer dobutamine 5mcg/kg/min by continuous IV infusion to client who weigh 250 lb. Available is dobutamine 250 mg in dextrose 5% in water 250 mL. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to nearest whole number. Use a leading zero if it applies, do not use a trailing zero.)
The Correct Answer is ["34"]
Convert the Client's Weight from Pounds to Kilograms:
1 kg = 2.205 lbs
Weight in kg = 250 lbs / 2.205 lbs/kg
Weight in kg ≈ 113.38 kg
Calculate the Dobutamine Dose in mcg/min:
Dose = 5 mcg/kg/min x 113.38 kg
Dose ≈ 566.9 mcg/min
Convert the Dobutamine Dose from mcg/min to mg/min:
1 mg = 1000 mcg
Dose in mg/min = 566.9 mcg/min / 1000 mcg/mg
Dose in mg/min ≈ 0.5669 mg/min
Calculate the Dobutamine Dose in mg/hr:
Dose in mg/hr = 0.5669 mg/min x 60 min/hr
Dose in mg/hr ≈ 34.014 mg/hr
Calculate the Infusion Rate in mL/hr:
Available concentration = 250 mg / 250 mL = 1 mg/mL
Infusion Rate (mL/hr) = Dose in mg/hr / Concentration (mg/mL)
Infusion Rate (mL/hr) = 34.014 mg/hr / 1 mg/mL
Infusion Rate (mL/hr) ≈ 34.014 mL/hr
Round to the Nearest Whole Number:
34 mL/hr
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["4"]
Explanation
Identify the Desired Dose and Available Concentration:
Desired Dose: 5 mg of enalapril
Available Concentration: 1.25 mg/mL (This means there are 1.25 mg of enalapril in every 1 mL of solution)
Set up the Calculation:
We need to find the volume (in mL) that contains the desired dose of 5 mg.
We can use the following formula:
Volume (mL) = Desired Dose (mg) / Available Concentration (mg/mL)
Plug in the Values and Calculate:
Volume (mL) = 5 mg / 1.25 mg/mL
Volume (mL) = 4 mL
Round to the Nearest Whole Number (if necessary):
4mL
Correct Answer is ["38"]
Explanation
Identify the Given Information:
Infusion Rate: 150 mL/hr
Drop Factor: 15 gtt/mL
Convert the Infusion Rate to mL/min:
There are 60 minutes in 1 hour.
Infusion Rate (mL/min) = 150 mL/hr / 60 min/hr
Infusion Rate (mL/min) = 2.5 mL/min
Calculate the Drip Rate (gtt/min):
Drip Rate (gtt/min) = Infusion Rate (mL/min) x Drop Factor (gtt/mL)
Drip Rate (gtt/min) = 2.5 mL/min x 15 gtt/mL
Drip Rate (gtt/min) = 37.5 gtt/min
Round to the Nearest Whole Number:
38 gtt/min
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