The "perioperative" period for elderly patients is prone to a significant level of morbidity and mortality. Chronological age and comorbidities are the main causes of mortality. Loco-regional anaesthesia is used in 50% of cases. When general anaesthesia is used, invasive monitoring is the rule, with titration of medication and pain treatment. Cognitive dysfunctions are related to age rather than the anaesthetic technique. The aim is for early rehabilitation perhaps through ambulatory care.