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Life in the Fast Lane • LITFL • Medical Blog

Emergency medicine and critical care medical education blog

Critical Care Compendium | Paediatric Formulae

Paediatric Formulae

by Chris Nickson, Last updated January 15, 2013

GENERAL

  • Weight = (Age + 4) x2 (1-10yrs)
  • Vital signs

AIRWAY

  • Weight\Age ETT Length @ lips
  • 2yrs (Age\4) + 4 (age\2)+12
  • Length @ nose = (age\2) + 15
  • Aim for leak @ 20-30cmH2O in uncuffed
  • Length PO (Age\2) + 12
  • LMA #1 – < 6.5kg (4mL)
    LMA #1.5 – < 13kg
    LMA #2 – < 20kg (10mL)
    LMA #2.5 – < 25kg
    LMA #3 – 20-30kg (14mL)
    LMA #4 – > 30kg (20mL)
  • Air = (Size – 1) x 10mL
  • Dexamethasone

BREATHING

  • O2
  • Salbutamol
  • Adrenaline nebs

CIRCULATION

  • Epinehriene 0.1mL\kg of 1:10,000
  • Fluid Bolus 10-20mL\kg N\S
    Maintenance 4, 2, 1 -> 2.5% Dex + 1/2 N\S
  • Neonatal Art Line – 1.5mL\hr N\S
  • 3rd space loss – minor 2mL\kg\hr, major
  • Blood volume = 75mL\kg
  • Defibrillation 4 J\kg
  • Systolic BP = (Age x 2) + 80
  • Amiodarone 5mg\kg

Fluids

  • Crystalloid 20 mL/kg for resuscitation
  • RBC units 10mL\kg
  • Platelets 10mL\kg
  • FFP 15mL\kg
  • Cryo 5mL\kg

DRUGS FOR RSI/ RESUSCITIATION

  • Atropine 20mcg\kg
  • Propofol 4mg\kg
  • Thiopentone 3-6mg\kg
  • Suxamethonium
  • Larynygospasm 0.5-1mg\kg
  • RSI – neonates 2mg\kg, childrens 1mg\kg
  • IM dose >3mg\kg
  • Rocurnonium 0.6-1mg\kg
  • Vecuronium 0.1mg\kg
  • Atracurium 0.6-1mg\kg

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About Chris Nickson

FCICM FACEM BSc(Hons) BHB MBChB MClinEpid(ClinTox) DipPaeds DTM&H GCertClinSim

Chris is an Intensivist at the Alfred ICU in Melbourne and is an Adjunct Clinical Associate Professor at Monash University. He is also the Innovation Lead for the Australian Centre for Health Innovation and the Chair of the Australian and New Zealand Intensive Care Society (ANZICS) Education Committee. He has a passion for helping clinicians learn and for improving the clinical performance of individuals and collectives. After finishing his medical degree at the University of Auckland, he continued post-graduate training in New Zealand as well as Australia's Northern Territory, Perth and Melbourne. He has since completed further training in emergency medicine, clinical toxicology, clinical epidemiology and health professional education. He coordinates the Alfred ICU's education and simulation programmes and runs the unit’s education website, INTENSIVE. He created the 'Critically Ill Airway' course and teaches on numerous courses around the world. He is one of the founders of the FOAM movement (Free Open-Access Medical education) and is co-creator of Lifeinthefastlane.com, the RAGE podcast, the Resuscitology course, and the SMACC conference. His one great achievement is being the father of two amazing children. On Twitter, he is @precordialthump.

Reader Interactions

Comments

  1. Imran syed says

    January 11, 2018 at 11:29 am

    Hello everyone
    Calculating weight in children is always an issue and accuracy is lacking
    But the new APLS formula are supposed to be the most accurate ( ?)
    Old APLS formula , apparently underestimates weight in children in developed countries by almost 32%

    Here is the new formula( not accurate), bit the closest , I have started following this
    0-1 yr Age/2+4
    1-5 yrs (age*2)+8
    6-12 yrs (age*3)+7

    I love this website
    Keep up the good work

    Reply

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