The healthcare provider prescribes streptomycin 300 mg IM every 12 hours for a client with tuberculosis. The available vial is labeled, "Streptomycin 1 gram/2.5 mL." How many milliliters should the nurse administer? (Enter the numerical value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["0.8"]
Desired dose in milligrams = 300 mg
Convert the available concentration to mg/mL:
Available concentration = 1 gram / 2.5 mL
= 1000 mg / 2.5 mL
= 400 mg/mL
Calculate the volume to administer in mL:
Volume to administer (mL) = Desired dose (mg) / Available concentration (mg/mL)
= 300 mg / 400 mg/mL
= 0.75 mL
Round to the nearest tenth:
Rounded volume = 0.8 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["8"]
Explanation
Convert the prescribed dose to milligrams:
Prescribed daily dose = 150 mcg / 1000 mcg/mg
= 0.150 mg
Identify the strength of each available tablet:
Tablet strength = 0.075 mg/tablet
Calculate the number of tablets needed for one day:
Tablets per day = Prescribed daily dose / Tablet strength
= 0.150 mg / 0.075 mg/tablet
= 2 tablets
Calculate the number of days the remaining tablets will last:
Days remaining = Number of remaining tablets / Tablets per day
= 16 tablets / 2 tablets/day
= 8 days.
Correct Answer is ["180"]
Explanation
Convert the client's weight from pounds to kilograms:
Weight (kg) = Weight (pounds) / 2.2 pounds/kg
= 165 pounds / 2.2 pounds/kg
= 75 kg
Calculate the prescribed dose in mcg/minute:
Dose (mcg/minute) = Prescribed dose (mcg/kg/min) x Client's weight (kg)
= 2 mcg/kg/min x 75 kg
= 150 mcg/minute
Calculate the total amount of dobutamine prescribed per hour:
Dose per hour (mcg/hour) = Dose (mcg/minute) x 60 minutes/hour
= 150 mcg/minute x 60 minutes/hour
= 9000 mcg/hour
Convert the total amount of dobutamine in the IV solution to micrograms:
Total dobutamine (mcg) = Total dobutamine (mg) x 1000 mcg/mg
= 50 mg x 1000 mcg/mg
= 50000 mcg
Determine the concentration of the dobutamine solution in mcg/mL:
Concentration (mcg/mL) = Total dobutamine (mcg) / Total volume (mL)
= 50000 mcg / 1000 mL
= 50 mcg/mL
Calculate the infusion rate in mL/hour:
Infusion rate (mL/hour) = Desired dose per hour (mcg/hour) / Concentration (mcg/mL)
= 9000 mcg/hour / 50 mcg/mL
= 180 mL/hour
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