Postoperative cerebral dysfunction in the elderly: Diagnosis and prophylaxis. 
Post-operative cerebral dysfunction includes delirium, usually occurring early and reversible, and post-operative cognitive disorders, usually occurring later and prolonged.  This is a frequent complication in patients older than 75 years old.  The two neurological pictures are often inter-related.  The pathophysiology of both entities is similar and related to post-operative neuro-inflammation; therefore onset may occur independently of any surgical complication.  Post-operative cerebral dysfunction is a serious organic complication.  Reduction of inflammation represents the most logical preventive measure but currently there are no studies that show this to be effective.  Prevention therefore means combining several minor measures, elements that fit well into programs of enhanced post-operative recovery after surgery.  Diminished pre-operative cognitive status being a major risk factor, pre-operative rehabilitation combining nutritional, physical and cognitive support can be helpful.