Delirium is a common problem in the critically ill, affecting between 60-80% of mechanically ventilated patients. The importance of trying to prevent and when present, treat this condition, has only recently been appreciated.
Delirium is a form of organ dysfunction affecting the brain, in much the same way as shock represents dysfunction of the cardiovascular system.
3. Onset within hours or days, with a tendency to fluctuate.
3. Mixed delirium with fluctuation between hyperactive and hypoactive forms.
The hypoactive form is commonly overlooked unless appropriate testing is undertaken.