ABSTRACT
1.1 Regarding fluid and electrolyte homeostasis in a child:
Normal maintenance requirement in a child weighing 20 kg is 1.5 litre/day
A fluid deficit of 50ml/kg produces a body weight loss of 10%
Hypotension is a useful sign, which indicates moderate dehydration
Normal maintenance needs of sodium are 5-6mmol/kg/day
The characteristic metabolic abnormality in a child with pyloric stenosis is hyperkalaemic hypochloraemic metabolic alkalosis
