ATI Dosage Calculation RN Medical-Surgical Proctored Assessment 3.1 Questions & Answers | Complete Study Guide with Solutions 2026/2027

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Ati dosage calculation rn medical surgical proctored assessment
3.1

Total Questions : 30

Showing 30 questions

Question 1:

A nurse is preparing to administer hydrochlorothiazide 150 mg PO daily in 3
equally divided doses. Available is hydrochlorothiazide oral solution is 50 mg/5
mL. How many mL 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
Correct Answer: 5

Determine the single dose:

Total daily dose = 150 mg

Divided into 3 equal doses = 150 mg / 3 = 50 mg per dose

Determine the volume to administer:

Available concentration = 50 mg/5 mL

Desired dose = 50 mg

Volume to administer = (Desired dose / Available concentration) * Volume per dose

Volume to administer = (50 mg / 50 mg/mL) * 5 mL = 5 mL

Therefore, the nurse should administer 5 mL per dose.




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Question 2:

A nurse is preparing to administer phenytoin 200 mg via a gastrostomy tube.
Available is phenytoin oral suspension 125 mg/5 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
Correct Answer: 8

Desired dose: 200 mg

Available concentration: 125 mg/5 mL

To find the volume to administer, we can use the following formula:

Volume to administer (mL) = Desired dose (mg) / Concentration (mg/mL) * Volume per
dose

Volume to administer = (200 mg / 125 mg/mL) * 5 mL = 8 mL

Therefore, the nurse should administer 8 mL of phenytoin oral suspension.




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Question 3:

A nurse is preparing to administer methylprednisolone sodium succinate 30
mg/kg via intermittent IV bolus to a client who weighs 169 lb. Available is
methylprednisolone sodium succinate 125 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
Correct Answer: 18

Step 1: Convert pounds to kilograms

1 lb = 0.453592 kg

169 lb * 0.453592 kg/lb = 76.65 kg

Step 2: Calculate the total dose of methylprednisolone

Dose = 30 mg/kg * 76.65 kg = 2299.5 mg

Step 3: Calculate the volume to administer

The medication concentration is 125 mg/mL.

Volume = Total dose / Concentration = 2299.5 mg / 125 mg/mL = 18.396 mL

Step 4: Round to the nearest whole number

Volume = 18 mL

Therefore, the nurse should administer 18 mL of methylprednisolone sodium
succinate.




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Question 4:

A nurse is preparing to administer gentamicin 5 mg/kg via intermittent IV bolus
to a client who weighs 210 lb. The amount available is gentamicin 10 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
Correct Answer: 48

Step 1: Convert pounds to kilograms

1 lb = 0.453592 kg

210 lb * 0.453592 kg/lb = 95.25 kg

Step 2: Calculate the total dose of gentamicin

Dose = 5 mg/kg * 95.25 kg = 476.25 mg

Step 3: Calculate the volume to administer

The medication concentration is 10 mg/mL.

Volume = Total dose / Concentration = 476.25 mg / 10 mg/mL = 47.625 mL

Step 4: Round to the nearest whole number

Volume = 48 mL

Therefore, the nurse should administer 48 mL of gentamicin.




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