Ava weighs 53 kg and has been ordered 100% maintenance fluid with D5W + NS. a) What will the maintenance fluid volume over 24 hours be? b) What will the IV rate be set to?
Understand the Problem
The question is asking for calculations related to pediatric IV fluid maintenance for a child weighing 53 kg. It requires determining the total maintenance fluid volume over 24 hours and the IV administration rate.
Answer
The maintenance fluid volume is $2232$ mL and the IV rate should be $93$ mL/hour.
Answer for screen readers
The maintenance fluid volume over 24 hours is 2232 mL and the IV rate should be set to 93 mL/hour.
Steps to Solve
- Calculate the Maintenance Fluid Volume To determine the total maintenance fluid volume over 24 hours, we can use the following formula for pediatric patients:
For the first 10 kg: 10 kg × 4 mL/kg = 40 mL
For the next 10 kg: 10 kg × 2 mL/kg = 20 mL
For the remaining weight above 20 kg:
(53 kg - 20 kg) × 1 mL/kg = 33 mL
Adding these together gives:
$$ 40 , \text{mL} + 20 , \text{mL} + 33 , \text{mL} = 93 , \text{mL/hour} $$
To get the total volume for 24 hours:
$$ 93 , \text{mL/hour} \times 24 , \text{hours} = 2232 , \text{mL} $$
- Determine the IV Rate
The IV rate can be calculated by dividing the total volume by the time in hours. Since we need the rate in mL/hour:
$$ \frac{2232 , \text{mL}}{24 , \text{hours}} = 93 , \text{mL/hour} $$
Thus, the IV rate should be set to 93 mL/hour.
The maintenance fluid volume over 24 hours is 2232 mL and the IV rate should be set to 93 mL/hour.
More Information
This calculation uses the "4-2-1 rule" for estimating fluid needs in pediatric patients. The results ensure that the child maintains adequate hydration based on her weight.
Tips
- Forgetting to apply the correct formula for the weight segments can lead to inaccurate results.
- Not converting the total hourly volume into a daily volume.
- Rounding too early in calculations can introduce errors.
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