Prospective analysis of 3185 anaesthetic procedures revealed a complication rate of 201 per 1000 intraoperatively and 93 per 1000 during recovery. Cardiovascular complications were most frequent intra-operatively, whilst hyperglycaemia, nausea and vomiting were most common during recovery. Risk factors included ASA status, age, co-morbid conditions, prolonged anaesthesia, high surgical risk and intubation.