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Ati lpn adult med surg dosage calculation quiz proctored exam
Total Questions : 20
Showing 10 questions, Sign in for moreA nurse is preparing to administer lithium 300 mg PO every 8 hr. Available is lithium carbonate 150 mg capsules. How many capsules should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Ordered Dose (D) = 300 mg
Available Dose (H) = 150 mg
Quantity (Q) = 1 capsule
Have Method to Calculate the Number of Capsules
Capsules = (Dose Ordered (D) / Dose Available (H)) x Quantity (Q)
= (300 mg / 150 mg) x 1 capsule
= 2 x 1 capsule
= 2 capsules
A nurse is administering a unit of RBC 350 mL over 3 hr to a client who has anemia. 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 Infuse = 350 mL
Total Infusion Time = 3 hr
Calculate the Flow Rate in mL/hr
Flow Rate (mL/hr) = Total Volume (mL) / Total Infusion Time (hr)
= 350 mL / 3 hr
= 116.6667 mL/hr
Round to the Nearest Whole Number
= 117
A nurse is preparing to administer haloperidol 5 mg IM to a client. The amount available is haloperidol 20 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
Ordered Dose (D) = 5 mg
Available Dose (H) = 20 mg
Quantity (Q) = 1 mL
Calculate Volume (mL)
Volume (mL) = (Dose Ordered (D) / Dose Available (H)) x Quantity (Q)
= (5 mg / 20 mg) x 1 mL
= 0.25 x 1 mL
= 0.25 mL
A nurse is preparing to administer vancomycin 15 mg/kg/day divided equally every 12 hr. The client weighs 198 lb. How many mg should the nurse administer with each dose? (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)
Given weight = 198 lb
Conversion factor: 1 kg = 2.2 lb
Weight (kg) = 198 lb / 2.2 lb/kg
= 90 kg
Calculate the Total Daily Dose (mg/day)
Prescribed dose = 15 mg/kg/day
Total Daily Dose (mg/day) = Weight (kg) x Dose (mg/kg/day)
= 90 kg x 15 mg/kg/day
= 1,350 mg/day
Calculate the Single Dose (mg/dose)
The total daily dose is divided equally every 12 hours (2 doses per day).
Single Dose (mg) = Total Daily Dose / Number of doses per day
= 1,350 mg / 2
= 675 mg
A nurse is preparing to administer an IV fluid bolus of 500 mL 0.9% sodium chloride over 60 min. The drop factor of the manual IV tubing is 10 gtt/mL. The nurse should set the manual IV infusion 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 Infuse = 500 mL
Total Infusion Time = 60 min
Drop Factor = 10 gtt/mL
Calculate the Flow Rate in drops per minute (gtt/min)
Flow Rate (gtt/min) = (Total Volume (mL) / Time (min)) x Drop Factor (gtt/mL)
= (500 mL / 60 min) x 10 gtt/mL
= 8.333 x 10 gtt/mL
= 83.333 gtt/min
Round to the Nearest Whole Number
= 83.
A nurse is preparing to administer lidocaine 50 mg IV bolus. Available is lidocaine 200 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
Ordered Dose (D) = 50 mg
Available Dose (H) = 200 mg
Quantity (Q) = 1 mL
Calculate Volume (mL)
Volume (mL) = (Dose Ordered (D) / Dose Available (H)) x Quantity (Q)
= (50 mg / 200 mg) x 1 mL
= 0.25 x 1 mL
= 0.25 mL
Round to the Nearest Tenth
= 0.3.
A nurse is preparing to administer 0.45% sodium chloride (NaCl) 2000 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
Total Volume to Infuse = 2000 mL
Total Infusion Time = 8 hr
Calculate the Flow Rate in mL/hr
Flow Rate (mL/hr) = Total Volume (mL) / Total Infusion Time (hr)
= 2000 mL / 8 hr
= 250 mL/hr
A nurse is preparing to administer diphenhydramine 50 mg PO every 6 hr to a client who has acute dystonia. Available is diphenhydramine 25 mg tablets. How many tablets should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Ordered Dose (D) = 50 mg
Available Dose (H) = 25 mg
Quantity (Q) = 1 tablet
Calculate the Number of Capsules
Capsules = (Dose Ordered (D) / Dose Available (H)) x Quantity (Q)
= (50 mg / 25 mg) x 1 tablet
= 2 x 1 tablet
= 2 tablets
A nurse is preparing to administer 250 mg of an antibiotic IM. Available is 3 g/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
Convert the Available Dose from grams (g) to milligrams (mg)
Available Dose = 3 g
Conversion factor: 1 g = 1,000 mg
Available Dose (mg) = 3 g x 1,000 mg/g
= 3,000 mg
Calculate Volume (mL)
Ordered Dose (D) = 250 mg
Available Dose (H) = 3,000 mg
Quantity (Q) = 5 mL
Volume (mL) = (Dose Ordered (D) / Dose Available (H)) x Quantity (Q)
= (250 mg / 3,000 mg) x 5 mL
= 0.08333 x 5 mL
= 0.41667 mL
Round to the Nearest Tenth
= 0.4.
A nurse is preparing to administer heparin 2,000 units by IV bolus. Available is heparin injection 5,000 units/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
Ordered Dose (D) = 2,000 units
Available Dose (H) = 5,000 units
Quantity (Q) = 1 mL
Calculate Volume (mL)
Volume (mL) = (Dose Ordered (D) / Dose Available (H)) x Quantity (Q)
= (2,000 units / 5,000 units) x 1 mL
= 0.4 x 1 mL
= 0.4 mL
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