Risk factors for postoperative delirium in chronic hemodialysis patients after cardiac surgery

Abstract

We retrospectively studied the factors influencing the occurrence of postoperative delirium (POD) in maintenance dialysis patients who had undergone cardiac surgery at the Saitama Medical University International Medical Center between April 2010 and July 2012. POD was diagnosed using the Confusion Assessment Method for the Intensive Care Unit (CAM-ICU). We divided the 71 patients into two groups, based on the presence (Group D, n=9) and absence (Group N, n=62) of POD. Group D patients were significantly older and had a higher postoperative APACHEⅡ scores (p＜0.05) than Group N patients. Moreover, their mechanical ventilation period, continuous renal replacement therapy (CRRT) duration, and postoperative ICU stay were also significantly longer (p＜0.05). Since the demographic factor of age was strongly associated with the presence of POD in maintenance dialysis patients, it was believed to have had an effect on the postoperative APACHEⅡ score, mechanical ventilation period, CRRT duration, and postoperative ICU stay.