ATI RN Fundamentals Dosage Calculations 3.1
Exam Questions and Rationales 2024
A nurse is preparing to reconstitute amoxicillin/clavulanate oral suspension for a client.
According to the medication label, what will the total volume of medication in the
container be following reconstitution? (Round the answer to the nearest whole number.
Use a leading zero if it applies. Do not use a trailing zero.
The correct answer and explanation is:
RATIONALE
According to the medication label, the total volume of medication in the container
following reconstitution will be 75 mL.
The label states that when reconstituted, the total volume of the medication will be 75
mL.
A nurse is preparing to administer metronidazole 7.5 mg/kg PO to a client who weighs
146.7 lb. Available is metronidazole 500 mg tablets. How many tablets 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.)
RATIONALE
The first step is to convert the client's weight from pounds (lb) to kilograms (kg).
146.7 lb ÷ 2.2 lb/kg = 66.68 kg
Next, the nurse should calculate the total dose of metronidazole the client needs.
7.5 mg/kg x 66.68 kg = 500.1 mg
Since the available tablets are 500 mg each, the nurse should administer:
500.1 mg ÷ 500 mg/tablet = 1 tablet (rounded to the nearest whole number)
A nurse is preparing to administer valproic acid 125 mg PO. Available is valproic acid
syrup 250 mg/5 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.)
RATIONALE
, To determine how many mL of valproic acid syrup the nurse should administer, we need
to use a ratio and proportion:
250 mg : 5 mL = 125 mg : x mL Cross-multiplying, we get:
250 mg x x mL = 5 mL x 125 mg Simplifying, we get:
x = (5 mL x 125 mg) / 250 mg x = 2.5 mL
A nurse is converting a medication dose from g to mcg. The amount available is 5g. The
nurse should recognize that this amount is equal to how many mcg? (Round the answer
to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
RATIONALE
To convert grams (g) to micrograms (mcg), we need to multiply the number of grams by
1,000,000 (because
there are 1,000,000 mcg in 1 g):
5 g x 1,000,000 mcg/g = 5,000,000 mcg
A nurse is preparing to administer filgrastim 480 mcg subcutaneously daily. Filgrastim
injection 300 mcg/mL is available. 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."
RATIONALE
To calculate the number of mL the nurse should administer per dose, you need to divide
the dose of filgrastim in mcg by the concentration of the filgrastim injection in mcg/mL.
480 mcg ÷ 300 mcg/mL = 1.6 mL
So, the nurse should administer 1.6 mL of filgrastim injection per dose.
A nurse is assisting an assistive personnel to document a client's weight in
the medical record. Which of the following should the nurse identify as a
metric unit?
Exam Questions and Rationales 2024
A nurse is preparing to reconstitute amoxicillin/clavulanate oral suspension for a client.
According to the medication label, what will the total volume of medication in the
container be following reconstitution? (Round the answer to the nearest whole number.
Use a leading zero if it applies. Do not use a trailing zero.
The correct answer and explanation is:
RATIONALE
According to the medication label, the total volume of medication in the container
following reconstitution will be 75 mL.
The label states that when reconstituted, the total volume of the medication will be 75
mL.
A nurse is preparing to administer metronidazole 7.5 mg/kg PO to a client who weighs
146.7 lb. Available is metronidazole 500 mg tablets. How many tablets 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.)
RATIONALE
The first step is to convert the client's weight from pounds (lb) to kilograms (kg).
146.7 lb ÷ 2.2 lb/kg = 66.68 kg
Next, the nurse should calculate the total dose of metronidazole the client needs.
7.5 mg/kg x 66.68 kg = 500.1 mg
Since the available tablets are 500 mg each, the nurse should administer:
500.1 mg ÷ 500 mg/tablet = 1 tablet (rounded to the nearest whole number)
A nurse is preparing to administer valproic acid 125 mg PO. Available is valproic acid
syrup 250 mg/5 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.)
RATIONALE
, To determine how many mL of valproic acid syrup the nurse should administer, we need
to use a ratio and proportion:
250 mg : 5 mL = 125 mg : x mL Cross-multiplying, we get:
250 mg x x mL = 5 mL x 125 mg Simplifying, we get:
x = (5 mL x 125 mg) / 250 mg x = 2.5 mL
A nurse is converting a medication dose from g to mcg. The amount available is 5g. The
nurse should recognize that this amount is equal to how many mcg? (Round the answer
to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
RATIONALE
To convert grams (g) to micrograms (mcg), we need to multiply the number of grams by
1,000,000 (because
there are 1,000,000 mcg in 1 g):
5 g x 1,000,000 mcg/g = 5,000,000 mcg
A nurse is preparing to administer filgrastim 480 mcg subcutaneously daily. Filgrastim
injection 300 mcg/mL is available. 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."
RATIONALE
To calculate the number of mL the nurse should administer per dose, you need to divide
the dose of filgrastim in mcg by the concentration of the filgrastim injection in mcg/mL.
480 mcg ÷ 300 mcg/mL = 1.6 mL
So, the nurse should administer 1.6 mL of filgrastim injection per dose.
A nurse is assisting an assistive personnel to document a client's weight in
the medical record. Which of the following should the nurse identify as a
metric unit?
