Comparison in placement location of disposable surface electrode in antidromic sensory nerve conduction study

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  • Sekiguchi Kenji
    Division of Neurology, Kobe University Graduate School of Medicine
  • Kohara Nobuo
    Department of Neurology, Kobe City Medical Center General Hospital
  • Kanda Fumio
    Division of Neurology, Kobe University Graduate School of Medicine
  • Toda Tatsushi
    Division of Neurology, Kobe University Graduate School of Medicine

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Other Title
  • 逆行性感覚神経伝導検査における貼布型ディスポーザブル表面電極の貼布位置による比較
  • ギャッコウ セイカンカク シンケイ デンドウ ケンサ ニ オケル チョウフガタ ディスポーザブル ヒョウメン デンキョク ノ チョウフ イチ ニ ヨル ヒカク

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Abstract

Although ring electrodes generally used in antidromic sensory nerve conduction studies of the hand, disposable surface electrodes for recording, which offer numerous advantages in terms of infection control and usability, are becoming increasingly popular. However, no studies on optimal electrode placement for disposable surface electrodes have been reported. The aim of this study was to determine optimal surface recording electrode placement in antidromic median sensory nerve conduction studies. The sensory nerve action potentials (SNAP) recorded in both hands of the ten healthy subjects evoked by median nerve stimulation at the wrist. The potentials were recorded from ring electrode at the base of the second digit as commonly used and disposable surface electrodes placed at 4 different locations (radial, volar, and medial aspects of the second digit, and radial aspect of the third digit). The latency and the amplitude of the SNAP delivered by disposable surface electrodes placed on midline volar aspect of the second digit were similar to measurements obtained by using ring electrodes. The responses delivered by surface electrode placement on radial aspect of the second digit had lower amplitude and shorter latency than responses using ring electrodes with statistically significance (p<0.001, paired t-test), suggesting that responses were influenced by volume conduction. These data indicate that disposable surface recording electrodes must be placed on the second digit volar midline in order to obtain similar results using ring electrodes in antidromic median sensory nerve conduction studies.

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