Question

calculate the 24 - hour maintenance fluid for a child who weighs 21 kg.
the provider wants this child to receive half of the daily maintenance fluid volume by iv.
calculate the ml/hr flow rate.

ml/hr (round answer to the whole number)

check

Explanation:

Step1: Calculate 24 - hour maintenance fluid

The formula for 24 - hour maintenance fluid for children is:
For the first \(10\) kg: \(100\space mL/kg\), for the second \(10\) kg: \(50\space mL/kg\), and for the remaining kg (\(> 20\) kg): \(20\space mL/kg\)
For a \(21\) kg child:

$$10\times100+(20 - 10)\times50+(21 - 20)\times20$$

$$=1000 + 500+20$$

$$=1520\space mL$$

Step2: Calculate half of the daily maintenance fluid

Half of \(1520\space mL\) is \(\frac{1520}{2}=760\space mL\)

Step3: Calculate mL/hr flow rate

Since we are calculating the flow rate over \(24\) hours for half of the daily fluid (assuming the provider wants the half - fluid to be given over \(24\) hours).
The flow rate \(r=\frac{760}{24}\approx32\space mL/hr\)

Answer:

\(32\)