Paediatrics numbers

 

Weight:

Estimate

·      Age x 2 + 9

Guestimate

·      Newborn: 3.5kg

·      1 year old: 10kg

·      5 year old: 20kg

·      10 year old: 30kg

 

Airway/breathing:

OPA size

·      00: neonate

·      0: infant

·      1: toddler / child

·      2: man-child

LMA size

·      1: <5kg

·      1.5: 5-10kg

·      2: 10-20kg

·      2.5: 20-30kg

·      3: 30-50kg

Laryngoscope

·      0: neonate

·      1: infant

·      2: toddler / child

·      3: man-child

ETT

·      Size = age/4 + 3.5 (cuffed)

o  Newborn: 3.5

o  1 year old: 4.0

o  5 year old: 5.0

o  10 year old: 6.0

·      Oral depth: age/2 + 12   OR   ETT size x 3

·      Nasal depth: add 25% (my rule)

Induction circuit

·      <20kg: T piece

·      >20kg: circle

Tidal volume

·      5-8mL/kg

 

Circulation:

Blood volume

·      Prem: 90mL/kg

·      Term: 85mL/kg

·      Infant: 80mL/kg

·      Child: 75mL/kg

·      Adolescent: 70mL/kg

Allowed bleeding

·      Blood volume x allowed % fall in Hb

o  e.g. If blood volume 500mL and accept Hb 100 -> 80

o  500mL x 20% = 100mL

Fluid bolus

·      10-20mL/kg

Infusion rate

·      10-20mL/kg/h

RBC

·      5mL/kg for 10 point rise

Plt

·      10mL/kg

FFP

·      10mL/kg

Cryo

·      10mL/kg

 

Drugs:

Propofol

·      3-5mg/kg

Sux

·      2mg/kg IV

·      4mg/kg IM

Atropine

·      10-20mcg/kg

Adrenaline

·      10mcg/kg arrest

·      1mcg/kg severe hypotension

DC shock

·      4J/kg

Synch shock

·      1J/kg