This research studies the influence of a multifactor-adjusted intervention based on NICE's guideline on prevention of delirium Patients admitted for open heart surgery of Imam Khomine hospital at 2014. In this semi-experimental clinical trial, 88 recruit patients are divided in two intervention and control groups. Inclusion criteria are who has no alcohol, addiction, Dementia, psychotropic drugs. Patients are removed required emergency surgery. Intervention is overcome cognitive disorders, dehydration, constipation, and infection, pain and sleep disorders. Demographic, sleep information are completed by questioners. The incidence of delirium is recorded by CAM-ICU.