Sepsis 2. Inborn error of metabolism 3. Severe respiratory distress 4. Non-accidental injury
All may be accompanied by hypoperfusion, hypothermia, hypoglycaemia, acidosis. A big liver may suggest heart failure, or else an inborn error of glucose metabolism, or else a hyperinflated chest. A high pCO2 suggests respiratory failure, a low pCO2 suggests respiratory compensation for metabolic acidosis. Subconjunctival or retinal haemorrhages suggest NAI.