Emergency Paediatric Calculation

🔑 Key Priorities

• Rapid, accurate calculation of critical doses

• Use age or weight-based tools

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Formulae and Rules of Thumb

Parameter	Formula/Guide
Weight (1–10 yrs)	(Age in years × 2) + 8
ETT size (uncuffed)	(Age ÷ 4) + 4
ETT size (cuffed)	(Age ÷ 4) + 3.5
ETT depth	ETT size × 3
Fluid bolus	10–20 mL/kg
Adrenaline (arrest)	10 mcg/kg IV/IO every 3–5 min
Adrenaline (anaphylaxis)	10 mcg/kg IM (max 300 mcg)
Atropine	20 mcg/kg IV (min 100 mcg)
Fentanyl	1–2 mcg/kg IV
Ketamine (induction)	1–2 mg/kg IV
Propofol (induction)	2–4 mg/kg IV

Consider CREDD book, Broselow tape or smartphone apps (e.g., PaedCalc) in real-time

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🔄 Ideal Crisis Flow

     Paediatric Emergency: Unstable Child
                  ↓
     Estimate Weight with Formula or Tape
                  ↓
       Calculate ETT, Drug Doses, Fluids
                  ↓
      Use Broselow or App to Confirm + Act