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Ati dosage calculation rn paediatrics nursing proctored assessment 3.2
Total Questions : 32
Showing 10 questions, Sign in for moreA nurse is preparing to administer gentamicin 36 mg IM to a school-age child. Available is gentamicin injection 40 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
Desired dose = 36 mg.
Available concentration = 40 mg/mL.
- Calculate the volume in milliliters (mL) to administer.
Volume (mL) = Desired dose (mg) / Available concentration (mg/mL)
= 36 mg / 40 mg/mL
= 0.9 mL.
A nurse is preparing to administer vancomycin 20 mg/kg by intermittent IV bolus every 8 hr to a child who weighs 64 lb. The amount available is vancomycin injection 50 mg/mL. How many mL of vancomycin should the child receive per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
- Convert the child's weight from pounds (lb) to kilograms (kg) using the conversion factor of 2.2 lb/kg.
= 11.6 mL.
Volume (mL) = Dose (mg) / Available concentration (mg/mL)
= 581.818 mg / 50 mg/mL
= 11.6363 mL.
Round the answer to the nearest tenth.
Dose (mg) = Ordered dose (mg/kg) × Patient's weight (kg)
= 20 mg/kg × 29.0909 kg
= 581.818 mg.
Available concentration = 50 mg/mL.
Calculate the volume in milliliters (mL) to administer per dose.
Patient's weight in kg = 64 lb / 2.2 lb/kg
= 29.0909 kg.
Calculate the dose in milligrams (mg) for the child.
A nurse is preparing to administer hydrocortisone 60 mg IV bolus to a child. The amount available is hydrocortisone 100 mg powder. Reconstituting with 2 mL of bacteriostatic water yields hydrocortisone 50 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
Desired dose = 60 mg.
- Determine the concentration of the medication after reconstitution.
The reconstituted concentration is 50 mg/mL.
- Calculate the volume in milliliters (mL) to administer.
Volume (mL) = Desired dose (mg) / Concentration (mg/mL)
= 60 mg / 50 mg/mL
= 1.2 mL.
A nurse is preparing to administer 7.5 mL of ampicillin 250 mg oral suspension to a toddler who has otitis media. The nurse should recognize that 7.5 mL is equivalent to how many tsp? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
Volume to be converted = 7.5 mL.
1 tsp = 5 mL.
- Calculate the equivalent volume in teaspoons.
Volume (tsp) = Volume (mL) / Conversion factor (mL/tsp)
= 7.5 mL / 5 mL/tsp
= 1.5 tsp.
A nurse is preparing to administer acetaminophen 10 mg/kg PO every 4 to 6 hr PRN pain to a toddler who weighs 26.4 lb. Available is acetaminophen liquid 160 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if applicable. Do not use a trailing zero.)
Explanation
Calculation:
- Convert the child's weight from pounds (lb) to kilograms (kg) using the conversion factor of 2.2 lb/kg.
Patient's weight in kg = 26.4 lb / 2.2 lb/kg
= 12 kg.
- Calculate the dose in milligrams (mg) for the child.
Dose (mg) = Ordered dose (mg/kg) × Patient's weight (kg)
= 10 mg/kg × 12 kg = 120 mg.
- Determine the concentration of the available medication.
The available concentration is 160 mg in 5 mL.
= 160 mg / 5 mL
= 32 mg/mL.
- Calculate the volume in milliliters (mL) to administer per dose.
Volume (mL) = Dose (mg) / Concentration (mg/mL)
= 120 mg / 32 mg/mL
= 3.75 mL.
- Round the answer to the nearest tenth.
= 3.8 mL.
A nurse is preparing to administer clindamycin phosphate IM 15 mg/kg/day divided in equal doses every 6 hr to an infant who weighs 21 lb. Available is clindamycin phosphate injection 150 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
- Convert the infant's weight from pounds (lb) to kilograms (kg) using the conversion factor of 2.2 lb/kg.
Patient's weight in kg = 21 lb / 2.2 lb/kg
= 9.5454 kg.
- Calculate the total daily dose in milligrams (mg).
Total daily dose = Ordered dose (mg/kg/day) × Patient's weight (kg)
= 15 mg/kg/day × 9.5454 kg
= 143.181 mg/day.
- Calculate the dose per administration (every 6 hr, which is 4 doses per day).
Dose per administration = Total daily dose (mg/day) / 4 doses/day
= 143.181 mg / 4
= 35.795 mg/dose.
Available concentration = 150 mg/mL.
- Calculate the volume in milliliters (mL) to administer per dose.
Volume (mL) = Dose per administration (mg) / Available concentration (mg/mL)
= 35.795 mg / 150 mg/mL
= 0.2386 mL.
- Round the answer to the nearest hundredth.
= 0.24 mL.
A nurse is preparing to administer digoxin 7.5 mcg/kg/day PO daily to a school-age child who weighs 52 lb. Available is digoxin elixir 50 mcg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
- Convert the child's weight from pounds (lb) to kilograms (kg) using the conversion factor of 2.2 lb/kg.
Patient's weight in kg = 52 lb / 2.2 lb/kg
= 23.6363 kg.
- Calculate the total daily dose in micrograms (mcg) for the child.
Total daily dose = Ordered dose (mcg/kg/day) × Patient's weight (kg)
= 7.5 mcg/kg/day × 23.6363 kg
= 177.272 mcg/day.
Since the medication is ordered "daily," the dose per administration is the same as the total daily dose.
Dose per administration = 177.272 mcg.
Available concentration = 50 mcg/mL.
- Calculate the volume in milliliters (mL) to administer per dose.
Volume (mL) = Dose per administration (mcg) / Available concentration (mcg/mL)
= 177.272 mcg / 50 mcg/mL
= 3.5454 mL.
- Round the answer to the nearest tenth.
= 3.5 mL.
A nurse is preparing to administer cephalexin 50 mg/kg/day PO divided in equal doses every 6 hr to a preschooler who weighs 37 lb. Available is cephalexin suspension 250 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
- Convert the preschooler's weight from pounds (lb) to kilograms (kg) using the conversion factor of 2.2 lb/kg.
Patient's weight in kg = 37 lb / 2.2 lb/kg
= 16.8181 kg.
- Calculate the total daily dose in milligrams (mg) for the child.
Total daily dose = Ordered dose (mg/kg/day) × Patient's weight (kg)
= 50 mg/kg/day × 16.8181 kg
= 840.905 mg/day.
- Calculate the dose per administration (every 6 hr, which is 4 doses per day).
Dose per administration = Total daily dose (mg/day) / 4 doses/day
= 840.905 mg / 4
= 210.226 mg/dose.
- Determine the concentration of the available medication.
The available concentration is 250 mg in 5 mL.
Concentration = 250 mg / 5 mL
= 50 mg/mL.
- Calculate the volume in milliliters (mL) to administer per dose.
Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)
= 210.226 mg / 50 mg/mL
= 4.2045 mL.
- Round the answer to the nearest tenth.
= 4.2 mL.
A nurse is preparing to administer 0.45% sodium chloride 1,000 mL IV to infuse over 8 hr. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
Total volume = 1,000 mL.
Infusion time = 8 hr.
- Calculate the flow rate in mL/hr.
Flow rate (mL/hr) = Total volume (mL) / Infusion time (hr)
= 1,000 mL / 8 hr
= 125 mL/hr.
A nurse is preparing to administer ondansetron 0.1 mg/kg IV bolus to a toddler who weighs 32 lb. Available is ondansetron injection 2 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculation:
- Convert the toddler's weight from pounds (lb) to kilograms (kg) using the conversion factor of 2.2 lb/kg.
Patient's weight in kg = 32 lb / 2.2 lb/kg
= 14.5454 kg.
- Calculate the dose in milligrams (mg) for the child.
Dose (mg) = Ordered dose (mg/kg) × Patient's weight (kg)
= 0.1 mg/kg × 14.5454 kg
= 1.45454 mg.
Available concentration = 2 mg/mL.
- Calculate the volume in milliliters (mL) to administer per dose.
Volume (mL) = Dose (mg) / Available concentration (mg/mL)
= 1.45454 mg / 2 mg/mL
= 0.72727 mL.
- Round the answer to the nearest hundredth.
= 0.73 mL.
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