New cutoffs for intraoperative somatosensory and motor evoked potentials during brain surgery

We aimed to identify the most reliable cutoff points for changes in somatosensory (SEPs) and motor (MEPs) evoked potentials predict postoperative deterioration after brain surgery. The data of 104 patients who had undergone surgery between December 2015 2016 were reviewed. muscle strength evaluated on day before, within 48 h 4 weeks sensitivity specificity existing alarm criteria intraoperative SEP MEP evaluated, receiver operating characteristic (ROC) curve analysis was performed optimal cutoffs. sensitivities pre-existing SEPs MEPs 8.3% 16.7%, with specificities 96.7% 95.7%, respectively. ROC estimated discriminating latency change amplitude 7.1% 21.0%, With these cutoffs, 66.7% 91.7%, 79.4% 55.4%, For surgery, we suggest new values a prolongation or 21.0% reduction amplitude.