Is delirium associated with pain and administered morphine in patients in the ICU after cardiac surgery

Delirium after cardiac surgery is associated with a prolonged length of stay in the ICU, prolonged ventilation time and higher in-hospital mortality. Although the exact pathophysiology of delirium is unknown, both the use of analgesics and the experience of pain have been suggested to be associated with the occurrence of delirium. The aim of the study was to evaluate the association between delirium and analgesics and pain in the ICU.