Question

The healthcare provider prescribes a loading dose of digoxin 0.6 mg intravenously (IV) for a client with heart failure (HF). The nurse obtains digoxin Injection 500 mcg in 2 mL vial from the electronic medication system. How many mL should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

Answer 1

Correct Answers:

1.2

Rationale :

🧪The prescribed dose is 0.6 mg, and the available concentration is 500 mcg per 2 mL, which equals 0.5 mg in 2 mL.

📏To find how many mL deliver 0.6 mg, use the proportion: 0.5 mg : 2 mL = 0.6 mg : X mL.

🧮Solving this proportion: 0.6 × 2 ÷ 0.5 = 2.4 ÷ 0.5 = 1.2 mL.

💉This ensures the client receives the full loading dose accurately from the concentrated vial.

📌Core Message

Use unit conversion and proportional reasoning to determine the correct volume for IV doses when concentrations are different.

Answer 2

Correct Answers:

1.2

Rationale :

⚖️The client weighs 132 lb, which equals 60 kg (132 ÷ 2.2).

🧮The total daily dose is 1 mg/kg twice a day, so 60 × 2 = 120 mg daily.

💧Since 60 mg is in 0.6 mL, then 120 mg requires 1.2 mL per day.

🩺This accounts for both doses within 24 hours.

📌Core Message

Accurate weight-based dosing requires pound-to-kilogram conversion and understanding the dose frequency.

Answer 3

Correct Answers:

21

Rationale :

📦The total volume is 2000 mL over 24 hours, which equals 83.3 mL/hour.

💧To convert to drops/min: 83.3 mL/hr ÷ 60 min/hr × 15 gtt/mL = 20.8 ≈ 21 gtt/min.

📏Rounding to the nearest whole number ensures safe and effective delivery.

🩺This calculation helps maintain proper fluid and glucose balance.

📌Core Message

Calculate mL per hour, then apply drop factor conversion to determine drip rate accurately.

Answer 4

Correct Answers:

6

Rationale :

🧮20 units in 1000 mL means each mL contains 0.02 units.

📈To deliver 2 milliunits/min, convert to hourly dose: 2 × 60 = 120 milliunits/hour.

💉120 ÷ 0.02 = 6000 mL/hour, which is incorrect, indicating we must convert properly.

🧪Instead, use the ratio: 20 units = 20,000 milliunits in 1000 mL ⇒ 20 milliunits/mL.

🧮So, 2 ÷ 20 = 0.1 mL/min × 60 = 6 mL/hour.

📌Core Message

Understand unit conversions and use ratio-proportion methods when calculating infusion rates for medications like oxytocin.

Answer 5

Correct Answers:

0.8

Rationale :

💉The vial concentration is 10,000 units/mL.

📏To deliver 8200 units, calculate: 8200 ÷ 10,000 = 0.82 mL, then round to 0.8 mL.

🧪This ensures the patient receives an accurate subcutaneous epoetin alfa dose.

⚕️Proper rounding maintains dose safety within clinical tolerance.

📌Core Message

Use unit-dose division and round correctly for safe subcutaneous injections.

Answer 6

Correct Answers:

4.8

Rationale :

📏Beractant is available as 100 mg per 4 mL.

🧮To give 120 mg, use the proportion: 100 mg : 4 mL = 120 mg : X mL.

💉Solving gives 120 × 4 ÷ 100 = 4.8 mL.

👶This dose delivers precise surfactant replacement therapy for neonates.

📌Core Message

Use dose-to-volume proportions to calculate precise amounts for neonatal medications.

Answer 7

Correct Answers:

20

Rationale :

📦The prescription is 200 mg twice a day = 400 mg/day.

📏The suspension provides 100 mg/5 mL, so 400 ÷ 100 = 4 × 5 = 20 mL/day.

💉This ensures the patient receives the correct total daily dose.

🩺It also supports safe administration for those who cannot swallow pills.

📌Core Message

Use daily total dose and available concentration to determine volume of oral suspensions.

Answer 8

Correct Answers:

0.9

Rationale :

💉Hydromorphone 4 mg from 10 mg/mL = 4 ÷ 10 = 0.4 mL.

📏Hydroxyzine 25 mg from 50 mg/mL = 25 ÷ 50 = 0.5 mL.

🧪Combined dose = 0.4 + 0.5 = 0.9 mL.

⚕️This ensures both medications are drawn into a single syringe accurately.

📌Core Message

Calculate each medication dose individually, then sum for combined injection volume.

Answer 9

Correct Answers:

17

Rationale :

📦Volume is 150 mL over 90 min = 1.67 mL/min.

💧To convert to drops: 1.67 × 10 gtt/mL = 16.7 ≈ 17 gtt/min.

📏This ensures a consistent delivery rate of the antiviral medication.

🧪Using correct drip factor prevents under- or over-infusion.

📌Core Message

Convert volume/time into drops/min using the correct drip factor.

Answer 10

Correct Answers:

7.5

Rationale :

📏750 mg in 100 mL gives a concentration of 750 ÷ 100 = 7.5 mg/mL.

💉This reconstituted solution allows accurate dosing for each administration.

📦Label instructions must be followed precisely to avoid dilution errors.

⚕️Knowing concentration post-reconstitution supports safe IV preparation.

📌Core Message

Calculate mg/mL concentration after reconstitution to ensure accurate dose preparation.

RN HESI Dosage Calculations 2023 Exam-1

No.

2 :
The healthcare provider prescribes enoxaparin 1 mg/kg SUBQ every 12 hours for a client who weighs 132 pounds. The medication is available in 60 mg/0.6 mL prefilled syringe. How many mL should the nurse administer per day? (Enter numerical value only.)

3 :
The healthcare provider prescribes 2 L of 5% dextrose in water (DW).IV to infuse in 24 hours. The IV administration set delivers 15 gtt/mL. How many gtt/min should the nurse regulate the infusion? (Enter numerical value only. If rounding is required, round to the nearest whole number.)

4 :
A client receives a prescription for oxytocin 2 milliunits/min intravenously (IV) for labor augmentation. The IV bag contains oxytocin 20 units in lactated Ringer's 1 liter. How many mL/hour should the nurse program the infusion pump to deliver? (Enter numerical value only.)

7 :
The healthcare provider prescribes cefixime oral suspension 200 mg PO twice a day for an older adult who has difficulty swallowing tablets. The bottle is labeled, "Cefixime for Oral Suspension, USP 100 mg per 5 mL." How many mL should the nurse administer daily? (Enter numerical value only.)

RN HESI Dosage Calculations 2023 Exam-1

No.

2 : The healthcare provider prescribes enoxaparin 1 mg/kg SUBQ every 12 hours for a client who weighs 132 pounds. The medication is available in 60 mg/0.6 mL prefilled syringe. How many mL should the nurse administer per day? (Enter numerical value only.)

3 : The healthcare provider prescribes 2 L of 5% dextrose in water (DW).IV to infuse in 24 hours. The IV administration set delivers 15 gtt/mL. How many gtt/min should the nurse regulate the infusion? (Enter numerical value only. If rounding is required, round to the nearest whole number.)

4 : A client receives a prescription for oxytocin 2 milliunits/min intravenously (IV) for labor augmentation. The IV bag contains oxytocin 20 units in lactated Ringer's 1 liter. How many mL/hour should the nurse program the infusion pump to deliver? (Enter numerical value only.)

7 : The healthcare provider prescribes cefixime oral suspension 200 mg PO twice a day for an older adult who has difficulty swallowing tablets. The bottle is labeled, "Cefixime for Oral Suspension, USP 100 mg per 5 mL." How many mL should the nurse administer daily? (Enter numerical value only.)

2 :
The healthcare provider prescribes enoxaparin 1 mg/kg SUBQ every 12 hours for a client who weighs 132 pounds. The medication is available in 60 mg/0.6 mL prefilled syringe. How many mL should the nurse administer per day? (Enter numerical value only.)

3 :
The healthcare provider prescribes 2 L of 5% dextrose in water (DW).IV to infuse in 24 hours. The IV administration set delivers 15 gtt/mL. How many gtt/min should the nurse regulate the infusion? (Enter numerical value only. If rounding is required, round to the nearest whole number.)

4 :
A client receives a prescription for oxytocin 2 milliunits/min intravenously (IV) for labor augmentation. The IV bag contains oxytocin 20 units in lactated Ringer's 1 liter. How many mL/hour should the nurse program the infusion pump to deliver? (Enter numerical value only.)

7 :
The healthcare provider prescribes cefixime oral suspension 200 mg PO twice a day for an older adult who has difficulty swallowing tablets. The bottle is labeled, "Cefixime for Oral Suspension, USP 100 mg per 5 mL." How many mL should the nurse administer daily? (Enter numerical value only.)