title: The optimal radiofrequency temperature in radiofrequency thermocoagulation for idiopathic trigeminal neuralgia: A cohort study.
abstract: OBJECTIVE
  Our previous study evaluated the effectiveness and safety of radiofrequency thermocoagulation (RFT) of trigeminal gasserian ganglion for idiopathic trigeminal neuralgia (ITN). The aim of this study was to evaluate the optimal radiofrequency temperature of computed tomography (CT)-guided RFT for treatment of ITN.
  
  
  METHODS
  A retrospective study of patients with ITN treated with a single CT-guided RFT procedure between January 2002 and December 2013. Patients were divided into ≤75 °C, 75 °C, and ≥80 °C groups according to the highest radiofrequency temperature used. Pain relief was graded from poor to excellent, and facial numbness/dysesthesia from I (absent) to IV (most severe).
  
  
  RESULTS
  A total of 1161 RFT procedures were undertaken in the 1137 patients. The mean follow-up time was 46 ± 31 months. There were no significant differences in the rate of excellent pain relief according to the radiofrequency temperature used. However, more patients experienced with no facial numbness or facial numbness gradually resolved and those patients treated at 75 °C had a lower rate of grade IV facial numbness/dysesthesia than other groups.
  
  
  CONCLUSIONS
  The optimal radiofrequency temperature to maximize pain relief and minimize facial numbness or dysesthesia may be 75 °C, but this requires confirmation.
authors.affiliation: Department of Pain Management, Xuanwu Hospital of Capital Medical University, Beijing, China.
authors.forename: Yuan-Zhang
authors.initials: YZ
authors.lastname: Tang
authors.forename: Li-Qiang
authors.initials: LQ
authors.lastname: Yang
authors.forename: Jian-Ning
authors.initials: JN
authors.lastname: Yue
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Wang
authors.forename: Liang-Liang
authors.initials: LL
authors.lastname: He
authors.forename: Jia-Xiang
authors.initials: JX
authors.lastname: Ni
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004564:Electrocoagulation / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013696:Temperature; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D014277:Trigeminal Neuralgia / Q000628:therapy*