Distribution of evoked paraesthesiae and effectiveness of brachial plexus block.
The distribution of paraesthesiae evoked by a low power nerve stimulator during performance of supraclavicular brachial plexus block was studied in 120 patients. Evoked paraesthesiae in the distribution of the median nerve was associated with a significant improvement in effectiveness of the block when compared with evoked paraesthesiae in the ulnar and radial distributions. A possible explanation for this finding is proposed.
D000328:Adult; D001917:Brachial Plexus / Q000502:physiology; D004558:Electric Stimulation / Q000295:instrumentation; D004582:Electronics, Medical; D006801:Humans; D008475:Median Nerve / Q000502:physiology*; D009407:Nerve Block; D011826:Radial Nerve / Q000502:physiology*; D014459:Ulnar Nerve / Q000502:physiology*