• Mao Xu, Jun Wang, Li-ping Zhang, Min Li, and Xiang-yang Guo.
• Department of Anesthesiology, Peking University Third Hospital, Beijing 100191, China.
• Zhonghua Yi Xue Za Zhi. 2010 Feb 2;90(5):319-22.

ObjectiveTo evaluate the manipulation and effects of continuous femoral nerve block after performing a combined spinal and epidural anesthesia.Methods60 patients, ASAI-II, scheduled for elective total knee arthroplasty were randomized to PRE group or POST group (n = 30 for the each). CFNB was implemented before CSEA in PRE group, while CFNB was completed after the anesthesia in POST group. After the surgery, 1% lidocaine 10 ml was injected in through the catheter as the priming dose following a continuous rate of 5 ml/h of 0.2% ropivacaine. The performance time of CFNB, VAS scores, patient satisfaction and adverse effects were recorded.ResultsThe performance time of CFNB in POST group was significantly lower than it in PRE group ((10.5 +/- 2.5) min vs (13.4 +/- 3.0) min) (P < 0.05). The patient satisfaction was much higher (P < 0.05), while the VAS scores was significantly lower in POST group (0.8 +/- 0.2) than those in PRE group (3.4 +/- 0.5) (P < 0.05) during the performance of CFNB. There were no significant differences in VAS scores at postoperative 6, 12, 24, 36 and 48 h, total patient satisfaction and adverse effects.ConclusionThe effects of CFNB after CSEA were definitely fine with higher patient satisfaction during the manipulation. It was a better choice of performing CFNB after CSEA.

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