1Datta S, Lambert DH, Gregus J,et al. Differential sensitivities of mammalian nerve fibers during pregnancy. Anesth Analg, 1983,62 : 1070-1072.
2Flanagan HL, Datta S, Lambert DH,et al. Effect of pregnancy on bupivacaine-induced conduction blockade in the isolated rabbit vagus nerve. Anesth Analg, 1987,66 : 123-126.
3Butterworth JF 4th, Walker FO, Lysak SZ. Pregnancy increases median nerve susceptibility to lidocaine. Anesthesiology, 1990,72 : 962-965.
4Datta S, Hurley RJ, Naulty JS,et al. Plasma and cerebrospinal fluid progesterone concentrations in pregnant and non- pregnant women. Anesth Analg, 1986,65 : 950-954.
5Arakawa M, Aoyama Y, Ohe Y. Blockade of the sacral segments in lumbar epidural anaesthesia. Br J Anaesth, 2003, 90:173-178.
6Curatolo M, Petersen-Felix S, Arendt-Nielsen L, et al. Adding sodium bicarbonate to lidocaine enhances the depth of epidural blockade. Anesth Analg, 1998,86 : 341-347.
7Arendt-Nielsen L, Brennum J, Sindrup S,et al. Electrophysiological and psychophysical quantification of temporal summation in the human nociceptive system. Eur J Appl Physiol Occup Physiol, 1994,68: 266-273.
8Arakawa M, Aoyama Y, Ohe Y. Epidural bolus injection with alkalinized lidocaine improves the blockade of the firstsacral segment. Can J Anesth,2002,49:566-570.
9Fagraeus L, Urban BJ, Bromage PR. Spread of epidural analgesia in early pregnancy. Anesthesiology, 1983,58: 184- 187.
10Dietz FB, Jaffe RA. Pregnancy does not increase susceptibility to bupivaeaine in spinal root axons. Anesthesiology, 1997, 87:610-616.
