4TAKAHASIN R,YAMEDA K,YOSHIYANA T,et al.Comparison of double-segment technique with single-space technique for cesarean section using Combined spinal epidural anesthesia[J].masui,1999,48(1):57-61.
5CHOI DH,KIM JA.Chang IS comparison of Combined spinal epidural anesthesia and epidural anesthesia for cesarean section[J].Acta Anaesthasion SC,2000,44(2):214-219.
