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Ati dosage calculation RN critical care proctored assessment 3.2 retake 1
Total Questions : 35
Showing 10 questions, Sign in for moreA nurse is preparing to administer propranolol 2 mg by intermittent IV bolus over 15 min. Available is propranolol 2 mg in 50 mL dextrose 5% in water. 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
Total volume to be infused = 50 mL.
Infusion time in minutes = 15 min.
- Convert the infusion time from minutes to hours.
Infusion time in hours = 15 min / 60 min/hr
= 0.25 hr.
- Calculate the infusion rate in mL per hour.
Infusion rate (mL/hr) = Total volume (mL) / Infusion time (hr)
= 50 mL / 0.25 hr
= 200 mL/hr.
A nurse is preparing to administer cefazolin 40 mg/kg/day IV bolus divided in equal doses every 12 hr to a neonate who weighs 5 kg. Available is cefazolin injection 330 mg/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
Calculate the total daily dose in milligrams (mg).
Total daily dose (mg) = Desired dose (mg/kg/day) × Weight (kg)
= 40 mg/kg/day × 5 kg
= 200 mg/day.
Calculate the dose per administration in milligrams (mg).
Number of doses per day = 24 hr / 12 hr
= 2 doses.
Dose per administration (mg) = Total daily dose (mg) / Number of doses per day
= 200 mg / 2 doses
= 100 mg.
Available concentration of the cefazolin injection = 330 mg/mL.
Calculate the volume in milliliters (mL) to administer per dose.
Volume per dose (mL) = Desired dose per administration (mg) / Available concentration (mg/mL)
= 100 mg / 330 mg/mL
= 0.303 mL.
Round the answer to the nearest tenth.
= 0.3 mL.
A nurse is preparing to administer cyclosporine 5 mg/kg IV bolus to a client who weighs 143 lb. Available is cyclosporine injection 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
Convert the client's weight from pounds (lb) to kilograms (kg).
Weight in kg = 143 lb / 2.2 lb/kg
= 65 kg
Calculate the total desired dose in milligrams (mg).
Desired dose (mg) = Desired dose (mg/kg) × Weight (kg)
= 5 mg/kg × 65 kg
= 325 mg
Available concentration of the cyclosporine injection = 50 mg/mL.
Calculate the volume in milliliters (mL) to administer.
Volume (mL) = Desired dose (mg) / Available concentration (mg/mL)
= 325 mg / 50 mg/mL
= 6.5 mL.
A nurse is preparing to administer lactated Ringer's 100 mL/hr by continuous IV infusion. The drop factor of the manual IV tubing is 15 gtt/mL. The nurse should set the IV flow rate to deliver how many gtt/min? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Infusion rate in mL/hr = 100 mL/hr.
Drop factor of the IV tubing = 15 gtt/mL.
Convert the infusion rate from mL/hr to mL/min.
Infusion rate in mL/min = 100 mL/hr / 60 min/hr
= 1.666... mL/min.
Calculate the IV flow rate in gtt/min.
IV flow rate (gtt/min) = Infusion rate (mL/min) × Drop factor (gtt/mL)
= 1.666... mL/min × 15 gtt/mL
= 25 gtt/min.
A nurse is preparing to administer a loading dose of phenytoin 10 mg/kg by IV bolus to a client who weighs 154 lb. Available is phenytoin injection 50 mg/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.)
Explanation
Convert the client's weight from pounds (lb) to kilograms (kg).
Weight in kg = 154 lb / 2.2 lb/kg
= 70 kg
Calculate the total desired dose in milligrams (mg).
Desired dose (mg) = Desired dose (mg/kg) × Weight (kg)
= 10 mg/kg × 70 kg
= 700 mg
Available concentration of the phenytoin injection = 50 mg/mL.
Calculate the volume in milliliters (mL) to administer.
Volume (mL) = Desired dose (mg) / Available concentration (mg/mL)
= 700 mg / 50 mg/mL
= 14 mL.
A nurse is preparing to administer furosemide 0.4 mg/kg/hr by continuous IV infusion to a client who weighs 82 kg. Available is furosemide in 50 mL of dextrose 5% in water with a final concentration of furosemide 1 mg/mL. The nurse should set the IV pump to administer how many mL/hr? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Calculate the total desired dose of furosemide in milligrams per hour (mg/hr).
Desired dose (mg/hr) = Desired dose (mg/kg/hr) × Weight (kg)
= 0.4 mg/kg/hr × 82 kg
= 32.8 mg/hr.
Available concentration of the furosemide solution = 1 mg/mL.
Calculate the volume in milliliters per hour (mL/hr) to administer.
Volume (mL/hr) = Desired dose (mg/hr) / Available concentration (mg/mL)
= 32.8 mg/hr / 1 mg/mL
= 32.8 mL/hr.
A nurse is reviewing the medication orders for a client who has heart failure. Which of the following prescriptions should the nurse clarify with the provider?
A nurse is caring for a client who has status epilepticus. The provider prescribes phenobarbital 400 mg IV bolus stat, then 200 mg IV bolus every 20 min until seizure activity stops, maximum 2 g. Available is phenobarbital injection 130 mg/mL. How many mL should the nurse administer per dose after the initial dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Desired dose per administration after the initial dose.= 200 mg.
Available concentration of the phenobarbital injection = 130 mg/mL.
Calculate the volume in milliliters (mL) to administer per dose.
Volume per dose (mL) = Desired dose per administration (mg) / Available concentration (mg/mL)
= 200 mg / 130 mg/mL
= 1.538 mL.
Round the answer to the nearest tenth.
= 1.5 mL.
A nurse is preparing to administer 0.9% sodium chloride 1,000 mL IV to infuse over 4 hr. The drop factor on the manual tubing is 12 gtt/mL. The nurse should regulate the flow rate to deliver how many gtt/min? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Total volume to be infused = 1,000 mL.
Infusion time in hours = 4 hr.
Convert the infusion time from hours to minutes.
Infusion time in minutes = 4 hr × 60 min/hr
= 240 min.
Drop factor of the manual IV tubing = 12 gtt/mL.
Calculate the flow rate in gtt/min.
Flow rate (gtt/min) = (Total volume (mL) × Drop factor (gtt/mL)) / Infusion time (min)
= (1,000 mL × 12 gtt/mL) / 240 min
= 12,000 / 240 gtt/min
= 50 gtt/min.
A nurse is preparing to administer dexamethasone 0.5 mg/kg/day IM to divide equally every 6 hr to a client who weighs 132 lb. Available is dexamethasone 4 mg/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
Convert the client's weight from pounds (lb) to kilograms (kg).
Weight in kg = 132 lb / 2.2 lb/kg
= 60 kg
Calculate the total daily desired dose in milligrams (mg).
Total daily desired dose (mg) = Desired dose (mg/kg/day) × Weight (kg)
= 0.5 mg/kg/day × 60 kg
= 30 mg/day.
Calculate the number of doses per day.
Doses are administered every 6 hr, so Number of doses per day = 24 hr / 6 hr
= 4 doses/day.
Calculate the dose per administration in milligrams (mg).
Dose per administration (mg) = Total daily desired dose (mg) / Number of doses per day
= 30 mg / 4 doses
= 7.5 mg.
Available concentration of the dexamethasone injection = 4 mg/mL.
Calculate the volume in milliliters (mL) to administer per dose.
Volume per dose (mL) = Desired dose per administration (mg) / Available concentration (mg/mL)
= 7.5 mg / 4 mg/mL
= 1.875 mL.
Round the answer to the nearest tenth.
= 1.9 mL.
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