ATI: Medication Administration for Pediatrics

These equations are taken from the RN ATI portal videos.




Client Weight Formula for Maintaining Daily Fluid Balance:  When running 0.9 NS IV for pediatric fluid maintenance, use this formula:

The sum of:

100 ml/kg for the first 10 kg

50 ml/kg for the second 10 kg

20 ml/kg for the remaining kg

Example: Calculate the fluid required for a 98 lb child.  Round to the ten.
 98lb / (2.2 lb/kg) = 44.54 kg  <--I noticed that for the ATI, they rounded this to 44.5 kg right away.
1st 10 kg= 10 kg x 100 ml/kg = 1000 mL
2nd 10 kg = 10 kg x 50 ml/kg= 500 mL
remaining weight = 44.5 kg - 20 kg = 24.5 kg; 24.5 kg x (20ml/kg)= 490 mL
volume required to maintain daily fluid balance for a 98 lb child is: 1000 mL +500 mL + 490 mL=1549mL






Calculating Body Surface Area:  Sometimes, a doctor will prescribe medication by BSA (body surface area) when precise administration is required, such as with highly toxic medications.  The formula is:

http://dailymed.nlm.nih.gov/dailymed/archives/image.cfm?archiveid=19085&type=img&name=norvir-equation.jpg

Example: Calculate the BSA for a child weighing 9.5 kg and 74.5 cm.  Round to the hundredth.


Sqrt ( (9.5kg x 74.5 cm)/3600)
=Sqrt (707.75 kgcm/3600)
=Sqrt (0.1965972...kgcm)
=0.4433m^2
=0.44m^2