<unk>  <unk>  is a decline in<unk>  function (especially in memory and executive functions) that may last from 1–12 months after surgery, or longer. In some cases, this disorder may persist for several years after major surgery.<unk>  is distinct from emergence delirium. Its causes are under investigation and occurs commonly in older patients and those with pre-existing<unk>  impairment. The causes of<unk>  are not understood. It does not appear to be caused by lack of oxygen or impaired blood flow to the brain and is equally likely under regional and general anesthesia. It may be mediated by the body's inflammatory response to surgery.
Postoperative cognitive dysfunction
Postoperative nausea and vomiting
Post-chemotherapy cognitive impairment
Complications of traumatic brain injury
Stroke recovery
Primary and secondary brain injury
Postoperative fever
Central nervous system fatigue