Scalp Recorded Somatosensory Evoked Potentials During Spinal Surgery
The experiences in 124 intraoperative examinations with scalp SEP in spinal surgery including 38 scoliosis operations and 35 traumatic cases are reported. Technically reliable results were obtained in 92% of cases. Among the changes observed where a continuously decreasing amplitude in 26%, constant amplitudes in 40% and unclassifiable fluctuation in the remainder cases. Neurologically-induced changes were seen in two cases, changes induced by shock and acidosis were found in another two cases. The value of a reproducable P40/N50-complex is stressed and the problems of a grey zone of responses with difficult interpretation is discussed.
KeywordsSpinal Cord Spinal Cord Injury Neurologic Deficit Spinal Surgery Grey Zone
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