The Study Of Intraoperative Monitoring Of Cranial Nerve During Large Acoustic Neuroma Surgery

. The majority of acoustic neuromas were treated by surgery and radiosurgery, but surgery is still the main management for the large acoustic neuromas. Facial nerve paresis is the major morbidity of the surgery. Patient with facial nerve paresis will have heave mental effect. One of the current objective is excellent preservation of facial function. By using the microsurgery and intraoperative cranial nerve monitoring the goal is hopeful.In this study, we use intraoperative cranial nerve monitoring to 50 patients with large acoustic neuroma. Review the surgical outcome to show that intraoperative cranial nerve monitoring is helpful to the preservation of the function of facial nerve.Object: Provide a detailed analysis of intraoperative cranial nerve monitoring with respect to their surgical significance.Methods: 100 patient divided to two groups, monitoring group: 50 patient treating with microsurgery and intraoperative cranial nerve monitoring. Unmonitoring group: 50 patient treating with microsurgery only. Compare the different facial nerve function of two group in preoperation and postoperation. Results unmonitoring group: total or subtotal removal of tumor is 46 (92%).the number of anatomical and functional preservation of facial nerve is 40 and 30. Monitoring group: 50 patient treating with microsurgery only. Compare the different facial nerve function of two group in preoperation and postoperation. Results unmonitoring group: total or subtotal removal of tumor is 48 (96%).the number of anatomical and functional preservation of facial nerve is 50 and 45.There is statistical difference between two groups on the rate of anatomicaland functional preservation of facial nerve.Conclusions: intraoperative cranial nerve monitoring is useful to thepreservation of the function of facial nerve.