1) Bilotta F, Lauretta MP, Borozdina A, et al:Postoperative delirium:Risk factors, diagnosis and perioperative care. Minerva Anestesiol 79:1066-1076, 2013
2) Furuya M, Miyaoka T, Yasuda H, et al:Marked improvement in delirium with ramelteon:Five case reports. Psychogeriatrics 12:259-262, 2012
3) Hatta K, Kishi Y, Wada K, et al:Preventive effects of ramelteon on delirium:A randomized placebo-controlled trial. JAMA Psychiatry 71:397-403, 2014
4) Hirota T, Kishi T:Prophylactic antipsychotic use for postoperative delirium:A systematic review and meta-analysis. J Clin Psychiatry 74:36-44, 2013
5) Howland RH:Delirium and its prevention with melatonergic drugs. J Psychosoc Nurs Ment Health Serv 52:13-16, 2014
6) 井上雄一:高齢者における不眠治療の課題—メラトニン受容体アゴニスト,ラメルテオンの可能.PROGRESS IN MEDICINE 33:491-494, 2013
7) Lipowski ZJ:Delirium:Acute confusional states. Oxford Univ Press, London, 1990
8) Oresanya LB, Lyons WL, Finlayson E:Preoperative assessment of the older patient:A narrative review. JAMA 311:2110-2120, 2014
9) Parikh SS, Chung F:Postoperative delirium in the elderly. Anesth Analg 80:1223-1232, 1995
10) Rudolph JL, Jones RN, Rasmussen LS, et al:Independent vascular and cognitive risk factors for postoperative delirium. Am J Med 120:807-813, 2007