1.Treatment principle: Through C-arm guidance, precise positioning of the oval foramen, puncture, and mechanical compression of the semilunar ganglion after microballoon expansion, the trigeminal nerve root position can be changed, the brain pool segment shortened, focal axonal injury and demyelination changes; ② slight hemorrhage and small round cell infiltration in the ganglion, resulting in the destruction of defective coarse myelin and abnormal neurons associated with trigeminal neuralgia, to The treatment purpose of relieving facial pain. As long as coagulation dysfunction and severe bradycardia unresponsive to atropine are excluded, patients in general can tolerate the surgery. In China, the oldest patient who successfully performed this procedure was 98 years old. (2) Less patient pain, intraoperative general anesthesia, no pain during puncture, while local anesthesia puncture during radiofrequency treatment, especially when entering the foramen ovale, the patient is in abnormal pain, and the trigeminal nerve inhibition reflex is strong. (3) Short hospitalization time, generally 2-3 days of surgery can be discharged . (4) The cost of surgery is low, and the current treatment cost of this technology in our department is about 10,000 yuan.