Abstract Objective：To discuss the application of intraoperative neurophysiological monitoring in the microsurgery made for intraspinal tumor patients.Method：The clinical data of 20 patients with instraspinal tumor from May 2012 to October 2014 were analyzed retrospectively. The data suggested that all of the 20 cases had adopted microscopic resection and the surgeries were assisted with somatosensory evoked potentials，motion evoked potential and electromyogram. Result：12 cases tumors were totally resected and 8 cases tumors were partially resected.Postoperative pathological analysis 4 spinal meningiomas，5 epidermoid cysts，4 neurilemmomas，1 neurofibroma，2 lipomas，2 astrocytomas（1 grade Ⅰ astrocytoma and 1 grade Ⅱ astrocytoma），2 cystic teratomas.3-12 months follow-up by outpatient service and telephone back-visiting after the surgeries suggested that 18 patients’ neurological function had become stable or had been improved，1 recurred，1 exacerbated and no death case.Conclusion：Intraoperative neurophysiological monitoring can forewarn surgeons timely and reduce surgical interference to the spinal cord function，can protect spinal nerves effectively，avoid spinal cord function dropping after the surgeries， increase total removal rate and security and improve the patients’ prognosis.
