[1]Myles PS, Leslie K, McNeil J, et al. Bispectral index monitoring to prevent awareness during anaesthesia: the B-Aware randomised controlled trial[J]. Lancet,2004,363(9423):1757-1763.[2]Struys MM, Jensen EW, Smith W, et al. Performance of the ARX-derived auditory evoked potential index as an indicator of anesthetic depth: a comparison with bispectral index and hemodynamic measures during propofol administration[J]. Anesthesiology,2002,96(4):803-816.[3]Park KS, Hur EJ, Han KW, et al. Bispectral index does not correlate with observer assessment of alertness and sedation scores during 0.5% bupivacaine epidural anesthesia with nitrous oxide sedation[J]. Anesth Analg,2006,103(2):385-389.[4]Suzuki M, Edmonds HL Jr, Tsueda K, et al. Effect of ketamine on bispectral index and levels of sedation[J]. J Clin Monit Comput,1998,14(5):373.[5]Ngwenyama NE, Anderson J, Hoernschemeyer DG, et al. Effects of dexmedetomidine on propofol and remifentanil infusion rates during total intravenous anesthesia for spine surgery in adolescents[J]. Paediatr Anaesth,2008,18(12):1190-1195.[6]Nelson LE, Lu J, Guo T, et al. The alpha2-adrenoceptor agonist dexmedetomidine converges on an endogenous sleep-promoting pathway to exert its sedative effects[J]. Anesthesiology, 2003,98(2):428-436.[7]Huupponen E, Maksimow A, Lapinlampi P, et al. Electroencephalogram spindle activity during dexmedetomidine sedation and physiological sleep[J]. Acta Anaesthesiol Scand,2008,52(2):289-294.[8]Smith WD, Dutton RC, Smith NT. Measuring the performance of anesthetic depth indicators[J]. Anesthesiology,1996,84(1):38-51.[9]Struys MM, De Smet T, Depoorter B, et al. Comparison of plasma compartment versus two methods for effect compartment-controlled target-controlled infusion for propofol[J]. Anesthesiology, 2000, 92(2): 399-406.