5Betrfin AP, Merialdi M, Lauer JA, et al. Rates of caesarean section: analysis of global, regional and national estimates. Paediatr perinat Epidemiol, 2007,21 : 98-113.
6Langesaeter E, Rosseland LA, Stubhaug A. Continuous inva- sive blood pressure and cardiac output monitoring during ce- sarean delivery.- a randomized, double-blind comparison of low-dose versus high dose spinal anesthesia with intravenous phenylephrine of placebo infusion. Anesthesiology, 2008,109: 856-863.
7Ngan Kee WD, Lee A, Khaw KS, et al. A randomized doub le-blinded comparison of phenylephrine and ephedrine infusion combinations to maintain blood pressure during spinal anes- thesia for cesarean delivery., the effects on fetal acid-base sta- tus and hemodynamic control. Anesth Analg, 2008, 107: 1295-1302.
8Ngan Kee WD, Khaw KS. Low-dose spinal anesthesia with low-dose phenylephine infusion for cesarean delivery: better but not necessarily best. Anesthesiology, 2009,111 : 210 211.
9Tsen LC, Balki M. Oxytocin protocols during cesarean deliv- ery: time to acknowledge the risk/benefit ratio? Int J Obstet Anesth, 2010,19 .. 243-245.
10Bateman BT, Berman MF, Riley I.E, et al. The epidemiolo- gy of postpartum hemorrhage in a large nationwide of deliver- ies. Anesth Analg,2010,110:1368-t373.