Spinal cord monitoring in patients with nonidiopathic spinal deformities using somatosensory evoked potentials

Randall T. Loder, Gregory J. Thomson, Richard L. Lamont

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

Seventy-nine somatosensory evoked potentials were intraoperatively recorded in 52 patients undergoing spinal surgery for nonidiopathic spinal deformities. There were 37 true-negative, 28 true-positive (a significant change in the somatosensory evoked potential related to the surgical process), and 14 false-positive (a significant change in the somatosensory evoked potential not related to a surgical event) readings. There were, however, no postoperative neurologic deficits with any of the true-positive readings and no false negatives. Spinal and subcortical somatosensory evoked potentials gave few false-positive readings. True-positive somatosensory evoked potentials occurred in 44% of the patients with neuromuscular deformities, 17% with congenital deformities, 45% with Luque instrumentation, 22% with Harrington instrumentation, and none with fusion in situ. Fifty percent of the true positives occurred while the sublaminar wires were tightened. The predictive accuracy of intraoperative spinal cord monitoring in this patient population is not high, but the sensitivity to potentially harmful surgical events is high.

Original languageEnglish (US)
Pages (from-to)1359-1364
Number of pages6
JournalSpine
Volume16
Issue number12
DOIs
StatePublished - Dec 1991
Externally publishedYes

Keywords

  • Nonidiopathic deformities
  • Somatosensory evoked potentials
  • Spinal surgery

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Clinical Neurology

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