Dosage Calculation RN Critical Care
Assessment |ATI RN Critical Care Dosage
Calculation Proctored Assessment 3.1 Exam
Questions and Correct Answers. Graded A+
Question 1
A nurse is caring for a patient who weighs 128 lb. What is the patient's weight in kg?
(Round to nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer
Answer: 58.2 kg
Follow these steps for the Ratio and Proportion method of calculation:
Step 1: What is the unit of measurement the nurse should calculate? kg
Step 2: Set up an equation and solve for X.
2.2 lb/ 1 kg = Client's weight in lb /X kg
2.2 lb/ 1 kg = 128 lb / X kg
X kg = 58.181818 kg
Step 3: Round if necessary. 58.181818 kg = 58.2 kg
Step 4: Determine whether the weight conversion makes sense. If the client weighs 128
lb and 2.2 lb equals 1 kg, it makes sense that the client weighs 58.2 kg.
Page 1 of 37
,Question 2
A nurse is preparing to administer eszopiclone 2,000 mcg PO to a client. How many mg
should the nurse administer?
(Round to the nearest whole number. Use a leading zero if it applies. Do not use a
trailing zero.)
Correct Answer
Answer: 2 mg
Follow these steps for the Ratio and Proportion method of calculation:
Step 1: What is the unit of measurement the nurse should calculate? mg
Step 2: What is the dose the nurse should administer? Dose to administer = Desired
2,000 mcg
Step 3: What is the dose available? Dose available = Have 1 mg
Step 4: Should the nurse convert the units of measurement? Yes (mcg does not equal
mg)
1,000 mcg/1 mg = 2,000 mcg/X mg
X mg = 2 mg
Step 5: Round if necessary.
Step 6: Determine whether the amount to administer makes sense. If the prescription
reads 2,000 mcg and 1,000 mcg equals 1 mg, it makes sense to administer 2 mg. The
nurse should administer eszopiclone 2 mg PO.
Page 2 of 37
,Question 3
A nurse is preparing to administer benzathine penicillin G 1,200,000 units IM. Available is
benzathine penicillin G injection 600,000 units/mL. How many mL should the nurse
administer?
(Round answer to nearest whole number. Use a leading zero if it applies. Do not use a
trailing zero.)
Correct Answer
Answer: 2 mL
Follow these steps for the Ratio and Proportion method of calculation:
Step 1: What is the unit of measurement the nurse should calculate? mL
Step 2: What is the dose the nurse should administer? Dose to administer = Desired
1,200,000 units
Step 3: What is the dose available? Dose available = Have 600,000 units
Step 4: Should the nurse convert the units of measurement? No
Step 5: What is the quantity of the dose available? 1 mL
Step 6: Set up an equation and solve for X.
Have/Quantity = Desired/X
600,000 units / 1 mL = 1,200,000 units / X mL
X mL = 2 mL
Step 7: Round if necessary.
Step 8: Determine whether the amount to administer makes sense. If there are 600,000
units/mL and the prescription reads 1,200,000 units, it makes sense to administer 2 mL.
The nurse should administer benzathine penicillin G 2 mL IM.
Page 3 of 37
, Question 4
A nurse is preparing to administer furosemide 20 mg IM. Available is furosemide
injection 10 mg/mL. How many mL should the nurse administer?
(Round answer to nearest whole number. Use a leading zero if it applies. Do not use a
trailing zero.)
Correct Answer
Answer: 2 mL
Follow these steps for the Ratio and Proportion method of calculation:
Step 1: What is the unit of measurement the nurse should calculate? mL
Step 2: What is the dose the nurse should administer? Dose to administer = Desired 20
mg
Step 3: What is the dose available? Dose available = Have 10 mg
Step 4: Should the nurse convert the units of measurement? No
Step 5: What is the quantity of the dose available? 1 mL
Step 6: Set up an equation and solve for X.
Have/Quantity = Desired/X
10 mg/ 1 mL = 20 mg / X mL
X mL = 2 mL
Step 7: Round if necessary.
Step 8: Determine whether the amount to administer makes sense. If there are 10
mg/mL and the prescription reads 20 mg, it makes sense to administer 2 mL. The nurse
should administer furosemide 2 mL IM.
Question 5
Total intake:75% 4 oz. Boost, 50% 8 oz. juice, 350 mL ice chips, 1.4 L fluid bolus, 25% 6
oz. coffee. Calculate in mL.
Correct Answer
2,280 mL
Page 4 of 37
Assessment |ATI RN Critical Care Dosage
Calculation Proctored Assessment 3.1 Exam
Questions and Correct Answers. Graded A+
Question 1
A nurse is caring for a patient who weighs 128 lb. What is the patient's weight in kg?
(Round to nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer
Answer: 58.2 kg
Follow these steps for the Ratio and Proportion method of calculation:
Step 1: What is the unit of measurement the nurse should calculate? kg
Step 2: Set up an equation and solve for X.
2.2 lb/ 1 kg = Client's weight in lb /X kg
2.2 lb/ 1 kg = 128 lb / X kg
X kg = 58.181818 kg
Step 3: Round if necessary. 58.181818 kg = 58.2 kg
Step 4: Determine whether the weight conversion makes sense. If the client weighs 128
lb and 2.2 lb equals 1 kg, it makes sense that the client weighs 58.2 kg.
Page 1 of 37
,Question 2
A nurse is preparing to administer eszopiclone 2,000 mcg PO to a client. How many mg
should the nurse administer?
(Round to the nearest whole number. Use a leading zero if it applies. Do not use a
trailing zero.)
Correct Answer
Answer: 2 mg
Follow these steps for the Ratio and Proportion method of calculation:
Step 1: What is the unit of measurement the nurse should calculate? mg
Step 2: What is the dose the nurse should administer? Dose to administer = Desired
2,000 mcg
Step 3: What is the dose available? Dose available = Have 1 mg
Step 4: Should the nurse convert the units of measurement? Yes (mcg does not equal
mg)
1,000 mcg/1 mg = 2,000 mcg/X mg
X mg = 2 mg
Step 5: Round if necessary.
Step 6: Determine whether the amount to administer makes sense. If the prescription
reads 2,000 mcg and 1,000 mcg equals 1 mg, it makes sense to administer 2 mg. The
nurse should administer eszopiclone 2 mg PO.
Page 2 of 37
,Question 3
A nurse is preparing to administer benzathine penicillin G 1,200,000 units IM. Available is
benzathine penicillin G injection 600,000 units/mL. How many mL should the nurse
administer?
(Round answer to nearest whole number. Use a leading zero if it applies. Do not use a
trailing zero.)
Correct Answer
Answer: 2 mL
Follow these steps for the Ratio and Proportion method of calculation:
Step 1: What is the unit of measurement the nurse should calculate? mL
Step 2: What is the dose the nurse should administer? Dose to administer = Desired
1,200,000 units
Step 3: What is the dose available? Dose available = Have 600,000 units
Step 4: Should the nurse convert the units of measurement? No
Step 5: What is the quantity of the dose available? 1 mL
Step 6: Set up an equation and solve for X.
Have/Quantity = Desired/X
600,000 units / 1 mL = 1,200,000 units / X mL
X mL = 2 mL
Step 7: Round if necessary.
Step 8: Determine whether the amount to administer makes sense. If there are 600,000
units/mL and the prescription reads 1,200,000 units, it makes sense to administer 2 mL.
The nurse should administer benzathine penicillin G 2 mL IM.
Page 3 of 37
, Question 4
A nurse is preparing to administer furosemide 20 mg IM. Available is furosemide
injection 10 mg/mL. How many mL should the nurse administer?
(Round answer to nearest whole number. Use a leading zero if it applies. Do not use a
trailing zero.)
Correct Answer
Answer: 2 mL
Follow these steps for the Ratio and Proportion method of calculation:
Step 1: What is the unit of measurement the nurse should calculate? mL
Step 2: What is the dose the nurse should administer? Dose to administer = Desired 20
mg
Step 3: What is the dose available? Dose available = Have 10 mg
Step 4: Should the nurse convert the units of measurement? No
Step 5: What is the quantity of the dose available? 1 mL
Step 6: Set up an equation and solve for X.
Have/Quantity = Desired/X
10 mg/ 1 mL = 20 mg / X mL
X mL = 2 mL
Step 7: Round if necessary.
Step 8: Determine whether the amount to administer makes sense. If there are 10
mg/mL and the prescription reads 20 mg, it makes sense to administer 2 mL. The nurse
should administer furosemide 2 mL IM.
Question 5
Total intake:75% 4 oz. Boost, 50% 8 oz. juice, 350 mL ice chips, 1.4 L fluid bolus, 25% 6
oz. coffee. Calculate in mL.
Correct Answer
2,280 mL
Page 4 of 37
