M K Hatley

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The insertion of pedicle screws monitored by evoked electromyography (EMG) was prospectively evaluated in the 132 consecutive patients. The technique involved constant-voltage stimulation and was statistically evaluated at both the arbitrary 20- and 40-V settings. The patients were postoperatively evaluated clinically and radiographically. Computed(More)
A prospective evaluation of a consecutive series of patients undergoing anterior cervical surgery monitored by the neurogenic motor evoked-potential technique. To evaluate the efficacy of neurogenic motor evoked-potential (NMEP) monitoring and its ability to predict clinical outcome in anterior cervical surgery. Forty-nine consecutive patients undergoing(More)
STUDY DESIGN A prospective comparison of impedance measurements, electrically elicited electromyograms, and mechanically elicited electromyograms to detect pedicle wall breakthrough. OBJECTIVE To determine whether impedance measurements are as sensitive as electromyogram measurements in evaluating pedicle wall breakthrough. SUMMARY OF BACKGROUND DATA In(More)
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