结论差异性起搏可准确鉴别峡部形成完全阻滞还是存在缓慢传导。

Conclusions An accurate assessment of isthmus block or persistent isthmus conduction is possible with this technique of differential pacing.

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结论：0.5%，0.75%和1%罗哌卡因用于连续蛛网膜下腔运动神经完全阻滞时间无差异，恢复时间与剂量有关。

Conclusion There is no significant change of motor black time and it is related to drug dose for 0.5%, 0.75% and 1% ropivacaine in continuous spinal anesthesia.

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结果用传统判断峡部阻滞的方法做参照标准，选取位点进行差异性起搏共54次，峡部完全阻滞前18次，峡部完全阻滞后36次。

Results The results were compared with traditional criteria for isthmus block . 54 sites were assessed: 18 before and 36 after the achievement of complete isthmus block.

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