6Persson J, Flisbeerg P, Lundberg J. Thoracic epidural anes- thesia and epidural hematoma[ J ]. Aeta Anaesthesiol Scand, 2002,46(9) :1171-1174.
7Brull R, McCartney C J, Chan V W, et al. Neurological complications after regional anesthesia: contemporary esti- mates of risk[J]. Anesth Analg, 2007,104(4) :964-974.
8Zaric D, Christianen C, Pace N L, et al. Transient neuro- logic symptoms after spinal anesthesia with lidocaine versus other local anesthetic:a systematic review of randomized, controlled trims [ J ]. Anesth Analg, 2005,100 (6) : 1811-1816.