4Kim H Y,Lee M J,Kim M N.Effect of position changes after spinal anesthesia with low-dose bupivacaine in elderly patients:sensory block characteristics and hemodynamic changes[J].Korean J Anesthesiol,2013,64(3):234-239.
6Kitamura H,Kitayama M,Tanimo T.Successful anesthetic ma-nagement in a patient with chronic obstructive pulmonary disease (COPD) using dexmedetomidine and combined spinal-epidural anesthesia for low anterior resection of the rectum[J].Masui,2012,61(8):840-843.
7Ohtsuka M.Dexmedetomidine for postoperative sedation in el-derly patients with cognitive impairment[J].Masui,2012,61(4):379-383.
9Zhou Q H,Xiao W P,Yun X.Epidural anaesthesia with goal-directed administration of ropivacaine improves haemodynamic stability when combined with general anaesthesia in elderly patients undergoing major abdominal surgery[J].Anaesth Intensive Care,2013,41(1):82-89.
2Grant SA, Breslin DS, Macleod DB, et al. Variability indetermination of point of needle in sertion in peripheral nerve blocks:acomparison of experienced and inexperienced anaesthetists. Anaethesia,2003, 58(7):688-692.
3Van Zundert A, Brimacombe J. The LMA Supreme:a pilot study.Anaesthesia, 2008, 63:209-210.