Objective To analyse the safety and effectiveness of microvascular decompression completely under endoscopy-assisted or microscope-assisted (EVD or MYD) for trigeminal neuralgia.Methods A retrospective analysis was conducted for patients who underwent completely EVD or MVD from January,2014 to September,2016.The clinical data,operative data and results were analyzed.The patients were divided into two groups according to the techniques.The all procedure of distinguishing the responsible vessels and decompressing which was done completely under endoscope were EVD group (n=141).Those being done completely under microscope were MVD group (n=125).All operations were done by same operator and same approach.Results The intracranial nerve symptoms disappeared in 137 cases(97.2％) in EVD group and 120 cases(96.0％) in MVD group.There were no severe operative complications such as intracranial infection,facial paralysis,intracranial hematoma and death.Mild hearing loss was happened in 2 cases (1.42％) in EVD group and 5 cases (4.00％) in MVD group;facial hypoesthesia,5 cases (3.54％) in EVD group,8 cases(6.40％) in MVD group;Transient ataxia,3 cases (2.13％) in EVD group,5 cases(4.00％) in MVD group;cerebrospinal fluid leakage,3 cases(2.13％) in EVD group,3 cases(2.40％) in MVD group;Oral herpes,23 cases (22.5％) in EVD group,27 cases(24.3％) in MVD group.There was no statistically significant differences in curative effect and complications between two groups (P＞ 0.05).Conclusion There is no difference in curative effect and complications between the two methods of completely EVD and MVD.

Objective To summarize the microvascular decompression(MVD)surgery of vertebrobasilar blood vessel for primary trigeminal neuralgia patients. Methods Clinical data of 28 primary trigeminal neuralgia patients caused by vertebrobasilar blood vessel from October 2008 to June 2016 in our hospital were retrospectively analyzed.There were 25 patients receving MVD and 3 patients receiving MVD and trigeminal sensory-root partial rhizotomy. Results The neuralgia in all the 28 patients immediately disappeared after surgery.Facial hypesthesia on the operation side occurred in 3 patients receiving MVD and trigeminal sensory-root partial rhizotomy.During follow-ups for 3 -24 months(mean, 18.6 months), none of the trigeminal neuralgia relapsed. Conclusions For primary trigeminal neuralgia patients caused by vertebrobasilar blood vessel, adequate nerve decompression and restoration of normal nerve anatomy are the guarantee for the efficacy of MVD surgery.For vessels with tensions and can not be passaged by one-time,multi-point decompression can complete the surgery.