4Sprague DH.Effects of position and uterine displacement on spinal anesthesia for cesarean section[J].Anesthesiology,1976,44:164-166.
5曹泽毅.中华妇产科学[M].北京:人民卫生出版社,2004.2170-2172.
6曾因明,邓小明.米勒麻醉学.北京:北京大学医学出版社,2011:2233-2234.
7Ngan Kee WD, Khaw KS, Tan PE,et al. Placental transfer and fetal metabolic effects of phenylephrine and ephedrine during spinal anesthesia for cesarean delivery. Anesthesiology, 2009, 11 (3) .. 506-512.
8Magalhaes E,Goveia CS, Ladeira LC, et al. Ephedrine veraus phenylephrine: prevention of hypotension during apinal block for cesarean section and effects on the fetus. Rev Bras Aneate- siol, 2009,59(1) : 11-20.
