Question

The healthcare provider prescribes cefazolin 800 mg IM every 6 hours. The available vial is labeled, "Cefazolin 1 gram," and the instructions for reconstitution state, "For IM use, add 2.5 mL sterile water for injection to provide a total volume of 3.0 mL.. "How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

Answer 1

Correct Answers:

2.4

Rationale :

🧪Step 1: Convert the available dose to milligrams.

1 gram = 1,000 mg

🧪Step 2: Determine the concentration after reconstitution.

1,000 mg in 3.0 mL

1,000 mg ÷ 3.0 mL = 333.3 mg/mL

🧪 Step 3: Calculate the volume needed for 800 mg.

800 mg ÷ 333.3 mg/mL

2.4 mL

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Answer 2

Correct Answers:

1

Rationale :

🔷Step 1: Calculate the volume for hydromorphone:

4 mg ÷ 10 mg/mL = 0.4 mL

🔷 Step 2: Calculate the volume for hydroxyzine:

25 mg ÷ 50 mg/mL = 0.5 mL

🔷 Step 3: Add both volumes together:

0.4 mL + 0.5 mL = 0.9 mL,

rounded to 1.0 mL

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Answer 3

Correct Answers:

440

Rationale :

📌 Step 1: Identify the volume of the secondary infusion.

Pantoprazole 40 mg is in 110 mL

📌 Step 2: Convert infusion time to hours.

15 minutes ÷ 60 = 0.25 hours

📌 Step 3: Use the formula:

mL/hour = Volume ÷ Time

110 mL ÷ 0.25 hr

440 mL/hour

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Answer 4

Correct Answers:

8

Rationale :

📘Step 1: Determine how many doses the client receives in 24 hours.

Every 6 hours = 4 doses per day

📘 Step 2: Each dose is 800 mg.

Total daily dose = 800 mg × 4 = 3,200 mg/day

📘 Step 3: Each tablet is 400 mg, so:

3,200 mg ÷ 400 mg/tablet

8 tablets/day

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Answer 5

Correct Answers:

60

Rationale :

🧮Step 1: Convert the child’s weight from pounds to kilograms.

66 lb ÷ 2.2 = 30 kg

🧮 Step 2: Multiply the weight by the prescribed dose.

2 mg/kg × 30 kg

60 mg per dose

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Answer 6

Correct Answers:

20

Rationale :

🔷Step 1: Determine the concentration of insulin in the IV solution.

50 units in 100 mL

0.5 units/mL

🔷 Step 2: Use the formula:

mL/hour = Prescribed units/hour ÷ Concentration

10 units/hour ÷ 0.5 units/mL

20 mL/hour

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Answer 7

Correct Answers:

200

Rationale :

🔶Step 1: Identify the total volume to be infused:

200 mL

🔶 Step 2: Identify the infusion time:

1 hour

🔶 Step 3: Use the formula:

mL/hour = Volume ÷ Time

200 mL ÷ 1 hour

200 mL/hour

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Answer 8

Correct Answers:

0.5

Rationale :

🔷Step 1: Convert the client’s weight from pounds to kilograms.

132 lb ÷ 2.2 = 60 kg

🔷 Step 2: Calculate the total prescribed dose in micrograms.

5 mcg/kg/day × 60 kg

300 mcg/day

🔷 Step 3: Determine the concentration of the available medication.

The vial contains 480 mcg in 0.8 mL, so:

480 mcg ÷ 0.8 mL

600 mcg/mL

🔷 Step 4: Calculate the volume to administer.

300 mcg ÷ 600 mcg/mL

0.5 mL

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Answer 9

Correct Answers:

21

Rationale :

🔵 Step 1: Convert total volume to mL:

1 liter = 1,000 mL

🔵 Step 2: Convert infusion time to minutes:

8 hours × 60 = 480 minutes

🔵 Step 3: Use the formula:

gtt/min = (Volume × Drop factor) ÷ Time

(1,000 mL × 10 gtt/mL) ÷ 480 min

10,000 ÷ 480

20.83

🔵 Step 4: Round to the nearest whole number:

21 gtt/min

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Answer 10

Correct Answers:

0.25

Rationale :

🔷 Step 1: Identify the prescribed dose:

1.25 mg

🔷 Step 2: Identify the concentration after reconstitution:

5 mg/mL

🔷 Step 3: Calculate the volume to administer:

1.25 mg ÷ 5 mg/mL

0.25 mL

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Hesi-RN Dosage Calculation IV

No.

4 :
The healthcare provider prescribes acyclovir 800 mg by mouth (PO) every 6 hours for an adolescent with chicken pox. The medication is available in 400 mg tablets PO. How many tablets should the nurse administer to the client every 24 hours? (Enter the numeric value only.)

5 :
A 9-year-old child who weighs 66 lb is to receive gentamicin sulfate 2 mg/kg/dose every 8 hours for an Escherichia coli urinary tract infection. How many mg per dose should this child receive? (Enter numeric value only.)

6 :
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.)

7 :
A client receives a prescription for IV ciprofloxacin 400 mg every 12 hours, which is to be infused over an hour. The IV bag contains ciprofloxacin 400 mg in dextrose 5% in water (DSW) 200 mL. How many mL/hr should the nurse program the infusion pump to deliver? (Enter numerical value only)

9 :
A client receives a prescription for 1 liter of lactated Ringer's IV to be infused over 8 hours. The IV administration set delivers 10 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.)

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Hesi-RN Dosage Calculation IV

No.

4 : The healthcare provider prescribes acyclovir 800 mg by mouth (PO) every 6 hours for an adolescent with chicken pox. The medication is available in 400 mg tablets PO. How many tablets should the nurse administer to the client every 24 hours? (Enter the numeric value only.)

5 : A 9-year-old child who weighs 66 lb is to receive gentamicin sulfate 2 mg/kg/dose every 8 hours for an Escherichia coli urinary tract infection. How many mg per dose should this child receive? (Enter numeric value only.)

6 : 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.)

7 : A client receives a prescription for IV ciprofloxacin 400 mg every 12 hours, which is to be infused over an hour. The IV bag contains ciprofloxacin 400 mg in dextrose 5% in water (DSW) 200 mL. How many mL/hr should the nurse program the infusion pump to deliver? (Enter numerical value only)

9 : A client receives a prescription for 1 liter of lactated Ringer's IV to be infused over 8 hours. The IV administration set delivers 10 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 :
The healthcare provider prescribes acyclovir 800 mg by mouth (PO) every 6 hours for an adolescent with chicken pox. The medication is available in 400 mg tablets PO. How many tablets should the nurse administer to the client every 24 hours? (Enter the numeric value only.)

5 :
A 9-year-old child who weighs 66 lb is to receive gentamicin sulfate 2 mg/kg/dose every 8 hours for an Escherichia coli urinary tract infection. How many mg per dose should this child receive? (Enter numeric value only.)

6 :
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.)

7 :
A client receives a prescription for IV ciprofloxacin 400 mg every 12 hours, which is to be infused over an hour. The IV bag contains ciprofloxacin 400 mg in dextrose 5% in water (DSW) 200 mL. How many mL/hr should the nurse program the infusion pump to deliver? (Enter numerical value only)

9 :
A client receives a prescription for 1 liter of lactated Ringer's IV to be infused over 8 hours. The IV administration set delivers 10 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.)