Objective To analyze the relationship between trigeminal neuralgia and various nerve compression sites. Methods Forty patients with trigeminal neuralgia were enrolled in this study. The upper and lower jaw patients were treated as observation group (20 cases), and eye branch or one branch pain patients were as the control group (20 cases). Two groups of patients were treated with microvascular decompression, position of responsible vascular of the two groups of patients was analyzed and explored. Results Compared with the control group, the patients in the observation group had more blood vessels, and the oppression rate of the trigeminal tract was higher than that of the control group:80%(16/20) vs. 30% (6/20) (P<0.05). Conclusions The relationship between trigeminal neuralgia with different facial position and the location of nerve compression is different.

Objective To investigate the related factors affecting the efficacy of microvascular decompression (MVD) in the treatment of primary trigeminal neuralgia (TN). Methods MVD was performed in 120 patients with primary TN and single factor χ2 test and Logistic regression analysis were performed on the clinical data to evaluate the independent risk factors influencing the efficacy of MVD in the treatment of primary TN. Results The pain completely disappeared in 101 cases, the pain was relieved in 16 cases and the unhealed in 3 cases. Sixty cases had pure arterial compression,57 cases had venous compression, and 3 cases had no obvious responsibility vessel. Complete elimination of pain in the patients with venous compressionwaslower than that in patients with pure arterial oppression: 73.7% (42/57) vs. 86.7% (52/60), and the difference was statistically significant (P<0.05). The complete pain relief rate in patients with V2 bronchial pain was lower than that in other pain distribution areas: 13/19 vs. 87.1%(88/101), With significant difference (P<0.05). In patients with V2 bronchitis, the responsible vessels were mostly compressed from the ventral surface of the trigeminal nerve, and the difference was statistically significant (P<0.05). Logistic regression analysis showed , Venous compression and V2 pain were the independent risk factors influencing the clinical efficacy of MVD in the treatment of primary TN. Conclusions Patients with venous compression and V2 pain are less likely to havegood postoperative outcomes, and venous compression and V2 painare independent risk factors. In patients with V2 pain, the responsible vasculature tends to ventrally massage the trigeminal nerve, which is a new study direction of refractory V2 pain.