3Woodhouse A, Mather LE. The minimum effective concentration of opioids: a revisitation with patientcontrolled analgesia fentanyl[J].Reg Anesth Pain Med,2000,25(3):259- 267.
4Nelson KE,Rauch T,Terebuh V,et al.A comparison of intrathecal fentanyl and sufentanil for labor analgesia.Anesthesiolgy,2002,96:1070.
5Capogna G,Camorcia M,Columb MO.Minimum analgesic doses of fentanyl and sufentanil for epidural analgesia in the first stage of labor.Anesth Analg,2003,96:1178.
7Bodner-Adler,Bodner K,Kimberger O,et al.The effect of epidura analgesia on obstetric lacerations and neonatal outcome during sponta-neous vaginal delivery.Arch Gynecol Obstet,2003,267:130-133.
9Ngan Kee WD, Khaw KS, Ng FF, et al. Synergistic interaction between fentanyl and bupivacaine given intrathecally for labor analgesia [ J ] . Anesthesiology,2014,120(5 ) : 1126-1136.
10Kate J, Melzack R. Measurement of pain [ J ]. Surg Clin North Am, 1999,79(2) :231-352.
