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One Quick Question: What is the 421 Formula? – Video

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Video at a Glance

  • In PALS, the 4-2-1 formula assists the provider in calculating maintenance IV rates for pediatric patients.
  • The provider must know the child’s weight in kilograms.
  • The 4 refers to infusing 4 mLs of fluid for the first 10 kg bodyweight.
  • The 2 refers to infusing 2 mLs of fluid for the next 10 kg bodyweight.
  • The 1 refers to infusing 1 mLs of fluid for bodyweight left over.
  • Add the three numbers to get the total hourly amount for fluid maintenance.

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