臂丛；神经传导阻滞；麻醉，局部；神经刺激器。

Brachial plexus; Nerve block; Local anesthesia; Nerve stimulator.

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电生理检查以运动神经传导阻滞或部分阻滞为特点；

The electromyogram showed general and partial motor nerve conduction block.

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考虑到时间离散的影响因素，建议将CMAP波幅衰减大于相应神经节段95%正常上限值诊断为肯定的部分性运动神经传导阻滞。

For differentiating conduction block from temporal dispersion, the 95% normal upper limits of CMAP decay over different nerve segments is recommended for a definite partial conduction block.

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