IRCT2015050122029N1 IRCT 2017-05-30 Vice chancellor for research, Kashan University of Medical Sciences The effect of environmental simulation on the incidence of delirium Assessing the effect of environmental simulation on the incidence of delirium after coronary artery bypass graft surgery 2015-04-05 anticipated 100 Complete https://irct.ir/trial/19111 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Supportive. N/A Coronary artery bypass grafting. Intervention 1: In the intervention group: After using the MMSE test to rule out the delirium, the patients and one of their main companions will be interviewed to gather the information about the patients personal interests, personal belongings and emotional dependence to other family members. Then, patients’ personal belongings such as blanket sheet, spoon, fork and …. as well as favorite belongings such as photo frame, prayer book, Quran or favorite book is received at morning of operation day and after disinfection, they will be arranged in patient’s bedside. After consciousness (during the weaning and before exrtubation), the patient's companion will be presented at the patient's bedside for 10 minutes. Intervention 2: The control group: This group will receive no intervention other than the routine care of the ICU.