• Regional anesthesia · Sep 1992

    Brachial plexus block with the nerve stimulator: motor response characteristics at three sites.

    • F X Riegler.
    • Department of Anesthesia, University of Pennsylvania, Philadelphia.
    • Reg Anesth. 1992 Sep 1;17(5):295-9.

    Background And ObjectivesDifferences in motor response patterns, minimum electrical currents, and success rates using a nerve stimulator for brachial plexus block were determined for the interscalene, supraclavicular, and axillary approaches.MethodsSupervised, resident physicians performed 106 brachial plexus blocks. For each block, the minimum stimulating current, the strongest joint motion at the minimum current immediately before local anesthetic injection, presence or absence of other joint motion, and anesthetic success or failure were recorded.ResultsIn the interscalene group (n = 43), strongest joint motions clustered at the shoulder (40%) and elbow (54%). In the supraclavicular group (n = 29), strongest joint motions distributed bimodally at the elbow (62%) and fingers (31%). In the axillary group (n = 34), strongest joint motions clustered at the wrist (35%) and fingers (61%). Overall, concurrent, weaker joint motion was observed in 26% (p not significant). Overall, the minimum current producing visually observable or palpable upper extremity motor responses was 0.69 +/- 0.02 mA (mean +/- SEM, range 0.2-1.5). No significant differences were found for minimum currents by site of approach, presence or absence of weaker joint motion, or success or failure of anesthesia. The overall success rate was 89%, with the rate being 91% for interscalene, 97% for supraclavicular, and 79% for axillary approaches (p not significant). Within the axillary group, elbow flexion as the strongest joint motion was a significant predictors of failure compared with other responses (p < 0.05).ConclusionsLocalization of the brachial plexus with the nerve stimulator is equally effective at the interscalene, supraclavicular, and axillary sites. Current values in the range reported have no predictive value for success. Advantages of the nerve stimulator for brachial plexus block include an objective endpoint and continuous feedback.

      Pubmed     Copy Citation     Plaintext  

      Add institutional full text...

    Notes

     
    Knowledge, pearl, summary or comment to share?
    300 characters remaining
    help        
    You can also include formatting, links, images and footnotes in your notes
    • Simple formatting can be added to notes, such as *italics*, _underline_ or **bold**.
    • Superscript can be denoted by <sup>text</sup> and subscript <sub>text</sub>.
    • Numbered or bulleted lists can be created using either numbered lines 1. 2. 3., hyphens - or asterisks *.
    • Links can be included with: [my link to pubmed](http://pubmed.com)
    • Images can be included with: ![alt text](https://bestmedicaljournal.com/study_graph.jpg "Image Title Text")
    • For footnotes use [^1](This is a footnote.) inline.
    • Or use an inline reference [^1] to refer to a longer footnote elseweher in the document [^1]: This is a long footnote..

    hide…