Certified Pediatric Nurse Exam Practice 2025 – Complete Study Resource

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For a 3-year-old admitted with dehydration, how would you calculate the hourly fluid maintenance rate for a child weighing 13kg?

52 mL/hr

46 mL/hr

To calculate the hourly fluid maintenance rate for a child, the commonly used formula is based on the child's weight in kilograms. For the first 10 kg of body weight, the maintenance fluid requirement is approximately 100 mL/kg. For the next 10 kg, it's about 50 mL/kg, and for any weight beyond 20 kg, it’s 20 mL/kg.

In this case, the child weighs 13 kg. We can break this down as follows:

1. For the first 10 kg:

- 10 kg x 100 mL/kg = 1000 mL.

2. For the next 3 kg (since the child is 13 kg):

- 3 kg x 50 mL/kg = 150 mL.

Now, adding these together gives:

1000 mL + 150 mL = 1150 mL for a 24-hour period.

To find the hourly rate, divide the total by 24 hours:

1150 mL ÷ 24 hours ≈ 47.92 mL/hr, which can be rounded to 46 mL/hr.

Thus, the correct answer is indeed 46 mL/hr. This calculation emphasizes the

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36 mL/hr

26 mL/hr

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