1.Variety of the Wave Change in Compound Muscle Action Potential in an Animal Model.
Zenya ITO ; Shiro IMAGAMA ; Kei ANDO ; Akio MURAMOTO ; Kazuyoshi KOBAYASHI ; Tetsuro HIDA ; Kenyu ITO ; Yoshimoto ISHIKAWA ; Mikito TSUSHIMA ; Akiyuki MATSUMOTO ; Satoshi TANAKA ; Masayoshi MOROZUMI ; Yukihiro MATSUYAMA ; Naoki ISHIGURO
Asian Spine Journal 2015;9(6):952-957
STUDY DESIGN: Animal study. PURPOSE: To review the present warning point criteria of the compound muscle action potential (CMAP) and investigate new criteria for spinal surgery safety using an animal model. OVERVIEW OF LITERATURE: Little is known about correlation palesis and amplitude of spinal cord monitoring. METHODS: After laminectomy of the tenth thoracic spinal lamina, 2-140 g force was delivered to the spinal cord with a tension gage to create a bilateral contusion injury. The study morphology change of the CMAP wave and locomotor scale were evaluated for one month. RESULTS: Four different types of wave morphology changes were observed: no change, amplitude decrease only, morphology change only, and amplitude and morphology change. Amplitude and morphology changed simultaneously and significantly as the injury force increased (p<0.05) Locomotor scale in the amplitude and morphology group worsened more than the other groups. CONCLUSIONS: Amplitude and morphology change of the CMAP wave exists and could be the key of the alarm point in CMAP.
Action Potentials*
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Animals*
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Contusions
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Gravitation
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Laminectomy
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Models, Animal*
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Spinal Cord
Result Analysis
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