Optimum dose of normal saline for preloading epidural space required to prevent injury to blood vessel by epidural catheter placement for caesarean section

• DOI: 10.3760/cma.j.issn.0254-1416.2012.08.007
• Publication Date: 2012-08-20
• Authors: Chuanbao Han; Li Yu; Xiuhong Jiang; Xia Wu; Qinhai Zhou; Zhengnian Ding; Yanning Qian
• Keywords: Epidural space; Ropivacaine; Tuohy needle; Epidural administration

Objective To determine the optimum dose of normal saline (NS) for preloading epidural space required to prevent injury blood vessel by catheter placement caesarean section.Methods Two hundred ASA Ⅰ or Ⅱ parturients with a single baby at full term in vertex presentation,aged 24-35 yr,weighing 63-78 kg,scheduled section under continuous anesthesia,were randomly divided into4 groups (n-50 each):control group (group Ⅰ),NS2 ml Ⅱ),NS5 Ⅲ)and NS 10 Ⅳ).The puncture was performed L2-3 interspace Tuohy needle attached 5 syringe.Loss resistance used identify space.In C no fluid injected into before insertion catheter,while Ⅱ,Ⅲ and Ⅳ 2,5 were respectively.After test 3 1.5％ lidocaine,0.75％ ropivacaine 10-20 administered through catheter.MAP HR recorded (T0),at 20 min after end administration (T1.2),and surgery (T3).The number patients whom tinted withdrawn from recorded.The amount consumed upper level anesthesia measured pin-prick degree motor block assessed using modified Bromagc scale T2.Results The hemodynamic parameters range four groups.MAP significantly lower T2,the higher,and smaller than Ⅰ,Ⅱ Ⅲ (P ＜ 0.05).There significant difference MAP among ＞ 0.05).The fiom compared 0.05).Conclusion Preloading can occurrence induced influence on efficacy is dose.

Key words: Sodium chloride; Injections, epidural; Hematoma, epidural, spinal; Cesarean