The primary outcome is duration of delirium symptoms with ICDSC and CAM-ICU in the N-ICU based on a hypothesis that it is possible to decrease time with delirium in the N-ICU 20% or more. Power calculation: 56 patients will be enrolled during a 4-month period, in the baseline and the intervention group respectively, yielding a total of 112 patients (20% drop-out rate, 5% significance, 80% power).