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Pubmed for Handhelds

PUBMED FOR HANDHELDS

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  • Title: Interexaminer variance of median nerve compound muscle action potential measurements in hand position with and without fixation in plaster.
    Author: Higuchi K, Narita Y, Kuzuhara S.
    Journal: J Clin Neuromuscul Dis; 2008 Dec; 10(2):37-41. PubMed ID: 19169088.
    Abstract:
    OBJECTIVES: We examined how hand fixation affects interexaminer variance in measuring compound muscle action potential (CMAP) during nerve conduction studies of the median nerve. METHODS: Subjects comprised 6 experienced examiners [1 woman and 5 men; mean (SD) age, 38.3 +/- 8.5 years; range, 28-46 years]. The standardized median nerve motor conduction setting was used for electromyography. The mean of 5 serial stimulations was taken as 1 examination for each subject. Distal latency, conduction velocity, and peak-to-peak amplitude of CMAP were measured as parameters. Subjects were examined without hand fixation and with hands fixed in prepared plaster molds. RESULTS: Fixation yielded significantly decreased coefficient of variance for CMAP amplitude (5.0% +/- 3.4%) compared with measurement without fixation (8.4% +/- 3.7%; P = 0.028). No differences in distal latencies or conduction velocities were evident between fixation and nonfixation. CONCLUSIONS: This study provides quantitative evidence for empirical observations that hand fixation might decrease CMAP variability in median nerve studies.
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