Question

A client with neuroleptic malignant syndrome receives a prescription for dantrolene 1.5 mg/kg IV. The client weighs 198 pounds. The label on 250 mg vial reads, "Reconstitute with 5 mL sterile water for injection, USP. Reconstitution yields 50 mg/mL." How many mg should the nurse administer? (Enter numeric value only)

Answer 1

Correct Answers:

135

Rationale :

🟩Step 1: Convert weight to kilograms

198 lb÷2.2=90 kg

🟩 Step 2: Calculate prescribed dose

1.5 mg/kg×90 kg=135 mg

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Answer 2

Correct Answers:

1.1

Rationale :

🔹Convert weight from pounds to kilograms

132 pounds ÷ 2.2 = 60 kg (rounded to nearest whole number).

🔹Calculate the required dose in micrograms:

5 mcg/kg/day × 60 kg = 300 mcg/day.

🔹Determine the volume to administer:

The concentration is 480 mcg/0.8 mL.

300 mcg ÷ 480 mcg × 0.8 mL = 1.1 mL.

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Answer 3

Correct Answers:

3

Rationale :

🔹 Calculate the volume needed to administer 1,800,000 units

The concentration is 1,200,000 units/2 mL.

1,800,000 units ÷ 1,200,000 units = 1.5

🔹 Calculate the volume to administer:

1.5 × 2 mL = 3 mL.

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Answer 4

Correct Answers:

4.7

Rationale :

🔹Determine the dose required

The prescribed dose is 140 mg.

🔹Calculate the volume required from the available concentration

The available concentration is 30 mg/mL.

140 mg ÷ 30 mg/mL = 4.7 mL.

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Answer 5

Correct Answers:

2.4

Rationale :

🟩Step 1: Convert the prescribed dose to micrograms

0.6 mg = 600 mcg

🟩 Step 2: Determine the concentration from the vial

The vial contains 500 mcg in 2 mL.

🟩 Step 3: Calculate the volume to administer

600 mcg ÷ 500 mcg = 1.2

1.2 × 2 mL = 2.4 mL

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Answer 6

Correct Answers:

0.9

Rationale :

🔶Step 1: Calculate the volume of hydromorphone

The prescribed dose is 4 mg.

The concentration is 10 mg/mL.

4 mg ÷ 10 mg/mL = 0.4 mL

🔶 Step 2: Calculate the volume of hydroxyzine

The prescribed dose is 25 mg.

The concentration is 50 mg/mL.

25 mg ÷ 50 mg/mL = 0.5 mL

🔶 Step 3: Add the volumes together

0.4 mL (hydromorphone) + 0.5 mL (hydroxyzine) = 0.9 mL

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Answer 7

Correct Answers:

7.5

Rationale :

🟩Step 1: Identify the total amount of the drug

The total amount is 750 mg.

🟩Step 2: Identify the total volume after reconstitution

The total volume after reconstitution is 100 mL.

🟩 Step 3: Calculate the concentration

750 mg ÷ 100 mL = 7.5 mg/mL

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Answer 8

Correct Answers:

6

Rationale :

🟩Step 1: Convert the prescribed dose to units/min

2 milliunits/min = 0.002 units/min.

🟩 Step 2: Determine the concentration in the IV bag

20 units in 1 liter (1000 mL) = 20 units/1000 mL = 0.02 units/mL.

🟩 Step 3: Calculate the volume to deliver per minute

0.002 units/min ÷ 0.02 units/mL = 0.1 mL/min.

🟩 Step 4: Convert to mL/hour

0.1 mL/min × 60 min = 6 mL/hour.

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Answer 9

Correct Answers:

20

Rationale :

🟩Step 1: Identify the total amount of insulin in the IV bag

The total amount of insulin in the bag is 50 units.

🟩Step 2: Determine the infusion rate for insulin

The prescribed rate is 10 units/hour.

🟩 Step 3: Calculate the volume to administer per hour

The concentration is 50 units in 100 mL.

50 units/100 mL = 0.5 units/mL.

🟩 Step 4: Calculate the required volume for 10 units

10 units ÷ 0.5 units/mL = 20 mL/hour.

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Answer 10

Correct Answers:

3

Rationale :

🟩Step 1: Identify the prescribed dose

The prescribed dose is 120 mg.

🟩 Step 2: Determine the rate of administration

The recommended rate for IV administration is 40 mg/minute.

🟩 Step 3: Calculate the time to administer the full dose

120 mg ÷ 40 mg/minute = 3 minutes.

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HESI-RN Dosage Calc

No.

8 :
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.)

9 :
The pharmacy delivers an IV infusion of sodium chloride 100 mL with regular insulin 50 units for a client in diabetic ketoacidosis. The prescription rate is 10 units/hour. How many mL/hour should the nurse program the infusion pump? (Enter numeric value only.)

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HESI-RN Dosage Calc

No.

8 : 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.)

9 : The pharmacy delivers an IV infusion of sodium chloride 100 mL with regular insulin 50 units for a client in diabetic ketoacidosis. The prescription rate is 10 units/hour. How many mL/hour should the nurse program the infusion pump? (Enter numeric value only.)

8 :
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.)

9 :
The pharmacy delivers an IV infusion of sodium chloride 100 mL with regular insulin 50 units for a client in diabetic ketoacidosis. The prescription rate is 10 units/hour. How many mL/hour should the nurse program the infusion pump? (Enter numeric value only.)