CAUSES pre-existing liver disease (+/- exacerbation) drug induced (paracetamol, statins, amiodarone, antibiotics, NSAIDs, beta-blockers, ranitidine, volatiles) ischaemic (post clamping above hepatic artery, thrombosis, embolic, hypotension) surgical injury nutrition (TPN, EN) acalculous cholecystitis transfusion related hepatitis ASSESSMENT History pre-operative liver function…