A client receives a prescription for hydromorphone 1 mg IV every 2 to 3 hours PRN for pain. The medication is available in a 2 mg/mL vial. How many mL should the nurse administer? (Enter numerical value only.)
The Correct Answer is ["0.5"]
Calculation:
Identify the desired dose:
Desired dose = 1 mg
Available concentration = 2 mg/mL
Calculate the volume to administer:
Volume to administer (mL) = Desired dose (mg) / Available concentration (mg/mL)
= 1 mg / 2 mg/mL
= 0.5 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["6"]
Explanation
Calculation:
Determine the concentration of oxytocin in the IV solution in milliunits/mL:
Total units of oxytocin = 20 units
Convert units to milliunits:
20 units x 1000 milliunits/unit = 20000 milliunits
Total volume of solution = 1 liter = 1000 mL
Concentration = Total milliunits / Total volume
= 20000 milliunits / 1000 mL
= 20 milliunits/mL
Calculate the desired dose per hour in milliunits:
Desired dose per minute = 2 milliunits/min
Desired dose per hour = 2 milliunits/min x 60 minutes/hour
= 120 milliunits/hour
Calculate the infusion rate in mL/hour:
Infusion rate (mL/hour) = Desired dose per hour (milliunits/hour) / Concentration (milliunits/mL)
= 120 milliunits/hour / 20 milliunits/mL
= 6 mL/hour
Correct Answer is ["0.4"]
Explanation
Calculation:
Calculate the total daily dose in milligrams:
Total daily dose (mg) = Prescribed dose (mg/kg/day) x Child's weight (kg)
= 1.5 mg/kg/day x 42 kg
= 63 mg/day
Determine the number of doses per day:
Number of doses per day = 24 hours / Frequency of doses (hours)
= 24 hours / 6 hours/dose
= 4 doses/day
Calculate the dose to administer with each dose:
Dose per administration (mg) = Total daily dose (mg) / Number of doses per day
= 63 mg / 4 doses
= 15.75 mg
Calculate the volume to administer with each dose in mL:
Volume per dose (mL) = Desired dose (mg) / Available concentration (mg/mL)
= 15.75 mg / 40 mg/mL
=0.39375 mL
Round to the nearest tenth:
= 0.4 mL
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