Effects of different sedatives and analgesic on memory during fiberoptic intubation in patients scheduled for cervical spine surgery

Objective To investigate the effects of different combinations of sedatives and analgesic on memory during fiberoptic intubation in spontaneously breathing patients scheduled for cervical spine surgery. Methods Forty-five ASA Ⅰ or Ⅱ patients aged 16-55 yrs scheduled for cervical spine surgery were randomly divided into 3 groups according to the sedatives and analgesic used during fiberoptic tracheal intubation （ n = 15 each） ;