2Oshvandi K, Shiri FH, Fazel MR , et al. The effect of pre - warmed intravenous fluids on prevention of intraoperative hypothermia in cesarean section[J]. I- ran J Nurs Midwifery Res, 2014,19(1) :64- 69.
3Merboth MK, Barnason S . Managing pain : the fifth vital sign [J]. Nuts Clin North Am ,2000,35(2) :375 - 383.
