A nurse is preparing to administer adenosine 12 mg IV bolus to a client. Available is adenosine injection 60 mg/20 mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["4"]
Calculation:
Determine the desired dose:
Ordered dose: 12 mg
Determine the available concentration of the medication:
Available concentration: 60 mg / 20 mL
Calculate the volume needed to administer the desired dose:
Formula: Volume (mL) = Desired dose (mg) × (Volume of solution (mL) / Available dose (mg))
= 12 mg × (20 mL / 60 mg)
= 240 mL / 60
= 4 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["6.5"]
Explanation
Calculation:
Convert the client's weight from pounds (lbs) to kilograms (kg):
Formula: Weight in kg = Weight in lbs / 2.2 lbs/kg
= 143 lbs / 2.2 lbs/kg
≈ 65 kg
Calculate the total dose of cyclosporine needed:
Ordered dose: 5 mg/kg
Client's weight in kg: 65 kg
Formula: Total dose (mg) = Ordered dose (mg/kg) × Client's weight (kg)
= 5 mg/kg × 65 kg
= 325 mg
Determine the concentration of the available cyclosporine injection:
Available concentration: 50 mg/mL
Calculate the volume of cyclosporine to administer:
Formula: Volume to administer (mL) = Desired dose (mg) / Concentration (mg/mL)
= 325 mg / 50 mg/mL
= 6.5 mL
Correct Answer is ["33.8"]
Explanation
Calculation:
Convert the client's weight from pounds (lbs) to kilograms (kg):
Formula: Weight in kg = Weight in lbs / 2.2 lbs/kg
= 198 lbs / 2.2 lbs/kg
= 90 kg
Calculate the dopamine dosage in micrograms per minute:
Ordered dose: 5 mcg/kg/min
Client's weight in kg: 90 kg
Formula: Dosage (mcg/min) = Ordered dose (mcg/kg/min) × Client's weight (kg)
= 5 mcg/kg/min × 90 kg
= 450 mcg/min
Convert the dopamine dosage to micrograms per hour:
Conversion factor: 1 hour = 60 minutes
Formula: Dosage (mcg/hr) = Dosage (mcg/min) × 60 min/hr
= 450 mcg/min × 60 min/hr
= 27000 mcg/hr
Convert the dopamine concentration in the IV solution to micrograms per milliliter:
Available dopamine: 200 mg
Convert milligrams to micrograms: 200 mg × 1000 mcg/mg = 200000 mcg
Volume of solution: 250 mL
Formula: Concentration (mcg/mL) = Total micrograms / Total mL
= 200000 mcg / 250 mL
= 800 mcg/mL
Calculate the IV pump flow rate in mL/hr:
Formula: Flow rate (mL/hr) = Dosage needed (mcg/hr) / Concentration (mcg/mL)
= 27000 mcg/hr / 800 mcg/mL
= 33.75 mL/hr
Round the answer to the nearest tenth:
33.75 mL/hr rounded to the nearest tenth is 33.8 mL/hr.
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