5Folstein MF,Folstein SE,Mc Hugh P. Mini-mental state Apractical method for grading the cognitive state of patients for the clinician [J]. J Psychiatr Res,1999,12(3):189-198.
6Rasmussen LS,O' Brien JT,Silverstein JH,et al.Is perioperative cortisol secretion related to postoperative cognitive dysfunction? [J]. Acta Anaesthesiol Scand,2005,49(9):1225-1231.
7Sapolsky RM.Glucocorticoids and hippocampal atrophy in neuropsychiatric disorders [J]. Arch Gen Psychiatry,2000,57( 10):925-935.
8Bickel H,Gradinger R,Kochs E,et al.Incidence and risk factors of delirium after hip surgery [J]. Psyehiatr Prax,2004,31(7):360-365.
9Rohan D,Buggy DJ,Crowley S,et al.Increased incidence of Postoperative cognitive dysfunction 24hr after minor surgery in the elderly [J]. Can J Anaesth,2005,52(2):132-137.
10Ohtsuka M.Dexmedetomidine for postoperative sedation in elderly patients with cognitive impairment Masui[J].The Japanese Journal of Anesthesiology,2012,61(4):379-383.