The common guideline is 6 mo and 2 yo. Those ages are commonly viewed as cutoffs for risk levels. In our hospital for example, the presence of an attending will

The common guideline is 6 mo and 2 yo. Those ages are commonly viewed as cutoffs for risk levels. In our hospital for example, the presence of an attending will be required for induction/waking up of anesthesia under 2 years old. Under 6 months, the risk of respiratory complication is far greater, which is why surgery is withheld until that age, except in emergencies.