ATI DOSAGE CALCULATION RN MATERNAL
NEWBORN PRACTICE EXAM 100 Q AND A
WITH RATIONALES ULTIMATE STUDY
GUIDE AND SECRETS TO PASS
1. Oxytocin Titration for Labor Induction
A nurse is caring for a client at 39 weeks of gestation who requires
labor induction. The provider prescribes oxytocin 2
milliunits/min IV infusion
, to increase by 2 milliunits/min every 30 minutes. The pharmacy
provides oxytocin 30 units in 500 mL of 0.9% Sodium
Chloride. The nurse should set the infusion pump to deliver how
many mL/hr?
A) 1 mL/hr
B) 2 mL/hr
C) 3 mL/hr
D) 4 mL/hr
CORRECT ANSWER: B
RATiONAlE: First, convert units to milliunits: 30 units =
30,000 milliunits. Find the concentration per mL: 30,000
milliunits / 500 mL = 60 milliunits/mL. The required dose is 2
milliunits/min. Convert this to an hourly rate: 2 milliunits/min ×
60 min/hr = 120 milliunits/hr. Calculate the pump rate: 120
milliunits/hr ÷ 60 milliunits/mL = 2 mL/hr.
2. Magnesium Sulfate Loading Dose
,A nurse is preparing to administer a loading dose of magnesium
sulfate 4 g IV piggyback over 20 minutes to a client with
severe preeclampsia. The pharmacy supplies magnesium
sulfate 4 g in 100 mL of 5% Dextrose in Water (D5W). The
nurse should set the IV infusion pump to deliver how many
mL/hr?
A) 100 mL/hr
B) 200 mL/hr
C) 300 mL/hr
D) 400 mL/hr
CORRECT ANSWER: C
RATiONAlE: Use the volume-over-time formula: (Total
Volume in mL ÷ Time in minutes) × 60 min/hr. (100 mL ÷ 20
min) × 60 = 5 × 60 = 300 mL/hr.
3. Magnesium Sulfate Maintenance Dose
Following the loading dose, the provider prescribes a
maintenance infusion of magnesium sulfate at 2 g/hr IV.
The available IV bag contains magnesium sulfate 20 g in 500
mL of Lactated Ringer's. The nurse should set the infusion
pump to deliver how many mL/hr?
A) 25 mL/hr
B) 40 mL/hr
C) 50 mL/hr
D) 60 mL/hr
,CORRECT ANSWER: A
RATiONAlE: Determine the concentration of the solution
first: 20 g / 500 mL = 0.04 g/mL. To find the hourly rate for a 2
g/hr dose: 2 g/hr ÷ 0.04 g/mL = 50 mL/hr.
4. Neonatal Gentamicin Weight-Based Dosing
A nurse in the NICU is preparing to administer gentamicin 4
mg/kg IV piggyback to a newborn who weighs 6 lb 10 oz. How
many milligrams should the nurse administer per dose? (Round
the final answer to the nearest tenth).
A) 11.2 mg
B) 12.0 mg
C) 13.2 mg
D) 26.5 mg
CORRECT ANSWER: B
RATiONAlE: Convert ounces to pounds: 10 oz ÷ 16 oz/lb =
0.625 lb. Total weight = 6.625 lb. Convert pounds to kilograms:
6.625 lb ÷ 2.2 = 3.011 kg. Calculate the dose: 3.011 kg × 4 mg/kg
= 12.044 mg. Rounded to the nearest tenth, this is 12.0 mg.
5. Postpartum Methylergonovine Injection
A nurse is caring for a client experiencing postpartum
hemorrhage. The provider prescribes methylergonovine 0.2
mg IM immediately. The available vial is labeled
methylergonovine 0.2 mg/mL. How many mL should the
nurse administer?
, A) 0.5 mL
B) 1.0 mL
C) 1.5 mL
D) 2.0 mL
CORRECT ANSWER: B
RATiONAlE: Using the formula Dose Desired / Dose on Hand
× Volume: 0.2 mg / 0.2 mg × 1 mL = 1 mL.
6. Terbutaline Subcutaneous Dosing
A nurse is preparing to administer terbutaline 0.25 mg
subcutaneously to a client experiencing tachysystole during
labor induction. The available ampule is labeled terbutaline 1
mg/mL. How many mL should the nurse draw up?
A) 0.25 mL
B) 0.5 mL
C) 0.75 mL
D) 1 mL
CORRECT ANSWER: A
RATiONAlE: Desired dose (0.25 mg) ÷ Available dose (1 mg)
× 1 mL = 0.25 mL.
7. Ampicillin IV Piggyback Flow Rate
A provider prescribes ampicillin 2 g IV piggyback every 6
hours for a client with chorioamnionitis. The pharmacy dilutes
the ampicillin in 100 mL of 0.9% Sodium Chloride to be
NEWBORN PRACTICE EXAM 100 Q AND A
WITH RATIONALES ULTIMATE STUDY
GUIDE AND SECRETS TO PASS
1. Oxytocin Titration for Labor Induction
A nurse is caring for a client at 39 weeks of gestation who requires
labor induction. The provider prescribes oxytocin 2
milliunits/min IV infusion
, to increase by 2 milliunits/min every 30 minutes. The pharmacy
provides oxytocin 30 units in 500 mL of 0.9% Sodium
Chloride. The nurse should set the infusion pump to deliver how
many mL/hr?
A) 1 mL/hr
B) 2 mL/hr
C) 3 mL/hr
D) 4 mL/hr
CORRECT ANSWER: B
RATiONAlE: First, convert units to milliunits: 30 units =
30,000 milliunits. Find the concentration per mL: 30,000
milliunits / 500 mL = 60 milliunits/mL. The required dose is 2
milliunits/min. Convert this to an hourly rate: 2 milliunits/min ×
60 min/hr = 120 milliunits/hr. Calculate the pump rate: 120
milliunits/hr ÷ 60 milliunits/mL = 2 mL/hr.
2. Magnesium Sulfate Loading Dose
,A nurse is preparing to administer a loading dose of magnesium
sulfate 4 g IV piggyback over 20 minutes to a client with
severe preeclampsia. The pharmacy supplies magnesium
sulfate 4 g in 100 mL of 5% Dextrose in Water (D5W). The
nurse should set the IV infusion pump to deliver how many
mL/hr?
A) 100 mL/hr
B) 200 mL/hr
C) 300 mL/hr
D) 400 mL/hr
CORRECT ANSWER: C
RATiONAlE: Use the volume-over-time formula: (Total
Volume in mL ÷ Time in minutes) × 60 min/hr. (100 mL ÷ 20
min) × 60 = 5 × 60 = 300 mL/hr.
3. Magnesium Sulfate Maintenance Dose
Following the loading dose, the provider prescribes a
maintenance infusion of magnesium sulfate at 2 g/hr IV.
The available IV bag contains magnesium sulfate 20 g in 500
mL of Lactated Ringer's. The nurse should set the infusion
pump to deliver how many mL/hr?
A) 25 mL/hr
B) 40 mL/hr
C) 50 mL/hr
D) 60 mL/hr
,CORRECT ANSWER: A
RATiONAlE: Determine the concentration of the solution
first: 20 g / 500 mL = 0.04 g/mL. To find the hourly rate for a 2
g/hr dose: 2 g/hr ÷ 0.04 g/mL = 50 mL/hr.
4. Neonatal Gentamicin Weight-Based Dosing
A nurse in the NICU is preparing to administer gentamicin 4
mg/kg IV piggyback to a newborn who weighs 6 lb 10 oz. How
many milligrams should the nurse administer per dose? (Round
the final answer to the nearest tenth).
A) 11.2 mg
B) 12.0 mg
C) 13.2 mg
D) 26.5 mg
CORRECT ANSWER: B
RATiONAlE: Convert ounces to pounds: 10 oz ÷ 16 oz/lb =
0.625 lb. Total weight = 6.625 lb. Convert pounds to kilograms:
6.625 lb ÷ 2.2 = 3.011 kg. Calculate the dose: 3.011 kg × 4 mg/kg
= 12.044 mg. Rounded to the nearest tenth, this is 12.0 mg.
5. Postpartum Methylergonovine Injection
A nurse is caring for a client experiencing postpartum
hemorrhage. The provider prescribes methylergonovine 0.2
mg IM immediately. The available vial is labeled
methylergonovine 0.2 mg/mL. How many mL should the
nurse administer?
, A) 0.5 mL
B) 1.0 mL
C) 1.5 mL
D) 2.0 mL
CORRECT ANSWER: B
RATiONAlE: Using the formula Dose Desired / Dose on Hand
× Volume: 0.2 mg / 0.2 mg × 1 mL = 1 mL.
6. Terbutaline Subcutaneous Dosing
A nurse is preparing to administer terbutaline 0.25 mg
subcutaneously to a client experiencing tachysystole during
labor induction. The available ampule is labeled terbutaline 1
mg/mL. How many mL should the nurse draw up?
A) 0.25 mL
B) 0.5 mL
C) 0.75 mL
D) 1 mL
CORRECT ANSWER: A
RATiONAlE: Desired dose (0.25 mg) ÷ Available dose (1 mg)
× 1 mL = 0.25 mL.
7. Ampicillin IV Piggyback Flow Rate
A provider prescribes ampicillin 2 g IV piggyback every 6
hours for a client with chorioamnionitis. The pharmacy dilutes
the ampicillin in 100 mL of 0.9% Sodium Chloride to be
