Experience of application of intraoperative neurophysiological monitoring (IOM)in surgery of cerebral arterial aneurysms
Objective: The aims of this study were to analyze and compare the efficiency of motor evoked potentials (MEPs) and somatosensory evoked potentials (SSEPs) in the detection of impending motor impairment from subcortical ischemia in aneurysm surgery. Methods: A retrospective analysis was performed, involving 147 operations (2014 - 2018). MEPs were monitored in 66 cases, and SSEPs - in 81 cases. Clinical outcome was assessed before, 1 day after operation and on a hospital discharge day. Conclusions: Any more high prognostic value was showed by MEPs in prediction of new neurologic deficit after operation. Four critical moments of operation was observed. Transient critical MEPs and SSEPs amplitude decrease result in new permanent moderate neurologic deficit in 31,6% of cases.