Encephalopathy in critically ill patients.

Potentially reversible encephalopathies do add to the morbidity and mortality in critically ill patients. They are commonly seen in patients above 50 years between the 6th to 20th day of illness. Wernicke's encephalopathy, osmotic demyelination, hypoglycemia and other less common conditions like non-convulsive status, cerebral venous thrombosis and acute disseminated encephalomyelitis should be looked for in the appropriate setting as to facilitate early treatment.