scholarly journals The Clinical Effectiveness and Selectivity of Radiofrequency Trigeminal Rhizotomy Using a 2 mm Active Tip Electrode for the Treatment of Trigeminal Neuralgia

2005 ◽  
Vol 48 (6) ◽  
pp. 619 ◽  
Author(s):  
Seong Won Jung ◽  
Jeong Beom Lee ◽  
Seong Jun Hong ◽  
Keun Man Shin
Keyword(s):  
Trigeminal Neuralgia ◽  
Clinical Effectiveness ◽  
Radiofrequency Trigeminal Rhizotomy

scholarly journals Early postsurgical diffusivity metrics for prognostication of long-term pain relief after Gamma Knife radiosurgery for trigeminal neuralgia

2019 ◽  
Vol 131 (2) ◽  
pp. 539-548 ◽  
Author(s):  
Sarasa Tohyama ◽  
Peter Shih-Ping Hung ◽  
Jidan Zhong ◽  
Mojgan Hodaie
Keyword(s):  
Pain Relief ◽  
Trigeminal Neuralgia ◽  
Fractional Anisotropy ◽  
Gamma Knife ◽  
Trigeminal Nerve ◽  
Gamma Knife Radiosurgery ◽  
Mean Diffusivity ◽  
Clinical Effectiveness ◽  
Radial Diffusivity

OBJECTIVEGamma Knife radiosurgery (GKRS) is an important treatment modality for trigeminal neuralgia (TN). Current longitudinal assessment after GKRS relies primarily on clinical diagnostic measures, which are highly limited in the prediction of long-term clinical benefit. An objective, noninvasive, predictive tool would be of great utility to advance the clinical management of patients. Using diffusion tensor imaging (DTI), the authors’ aim was to determine whether early (6 months post-GKRS) target diffusivity metrics can be used to prognosticate long-term pain relief in patients with TN.METHODSThirty-seven patients with TN treated with GKRS underwent 3T MRI scans at 6 months posttreatment. Diffusivity metrics of fractional anisotropy, axial diffusivity, radial diffusivity, and mean diffusivity were extracted bilaterally from the radiosurgical target of the affected trigeminal nerve and its contralateral, unaffected nerve. Early (6 months post-GKRS) diffusivity metrics were compared with long-term clinical outcome. Patients were identified as long-term responders if they achieved at least 75% reduction in preoperative pain for 12 months or longer following GKRS.RESULTSTrigeminal nerve diffusivity at 6 months post-GKRS was predictive of long-term clinical effectiveness, where long-term responders (n = 19) showed significantly lower fractional anisotropy at the radiosurgical target of their affected nerve compared to their contralateral, unaffected nerve and to nonresponders. Radial diffusivity and mean diffusivity, correlates of myelin alterations and inflammation, were also significantly higher in the affected nerve of long-term responders compared to their unaffected nerve. Nonresponders (n = 18) did not exhibit any characteristic diffusivity changes after GKRS.CONCLUSIONSThe authors demonstrate that early postsurgical target diffusivity metrics have a translational, clinical value and permit prediction of long-term pain relief in patients with TN treated with GKRS. Importantly, an association was found between the footprint of radiation and clinical effectiveness, where a sufficient level of microstructural change at the radiosurgical target is necessary for long-lasting pain relief. DTI can provide prognostic information that supplements clinical measures, and thus may better guide the postoperative assessment and clinical decision-making for patients with TN.

Clinical effectiveness of lamotrigine and plasma levels in essential and symptomatic trigeminal neuralgia

Neurology ◽  
1997 ◽  
Vol 48 (6) ◽  
pp. 1714-1717 ◽  
Author(s):  
G. Lunardi ◽  
M. Leandri ◽  
C. Albano ◽  
S. Cultrera ◽  
M. Fracassi ◽  
...  
Keyword(s):  
Trigeminal Neuralgia ◽  
Plasma Levels ◽  
Clinical Effectiveness

Percutaneous Controlled Radiofrequency Trigeminal Rhizotomy for the Treatment of Idiopathic Trigeminal Neuralgia: 25-year Experience with 1600 Patients

Neurosurgery ◽  
2001 ◽  
Vol 48 (3) ◽  
pp. 524-534 ◽  
Author(s):  
Yücel Kanpolat ◽  
Ali Savas ◽  
Ahmet Bekar ◽  
Caglar Berk
Keyword(s):  
Pain Relief ◽  
Trigeminal Neuralgia ◽  
Cranial Nerves ◽  
High Rate ◽  
Cerebrospinal Fluid Leakage ◽  
Single Procedure ◽  
Idiopathic Trigeminal Neuralgia ◽  
Experienced Pain ◽  
Radiofrequency Trigeminal Rhizotomy

Abstract OBJECTIVE The objective of this study was to evaluate the effectiveness of percutaneous, controlled radiofrequency trigeminal rhizotomy (RF-TR). The outcome of 1600 patients with idiopathic trigeminal neuralgia after RF-TR was analyzed after a follow-up period of 1 to 25 years. METHODS A total of 1600 patients with idiopathic trigeminal neuralgia underwent 2138 percutaneous radiofrequency rhizotomy procedures between 1974 and 1999. Sixty-seven patients had bilateral idiopathic trigeminal neuralgia, and 36 of them were treated with bilateral RF-TR; 1216 patients (76%) were successfully managed with a single procedure, and the remainder were treated with multiple procedures. Benzodiazepines and narcotic analgesics were used for anesthesia because patient cooperation during the procedures was essential so that the physician could create selective, controlled lesions. RESULTS The average follow-up time was 68.1 ± 66.4 months (range, 12–300 mo). Acute pain relief was accomplished in 97.6% of patients. Complete pain relief was achieved at 5 years in 57.7% of the patients who underwent a single procedure. Pain relief was reported in 92% of patients with a single procedure or with multiple procedures 5 years after the first rhizotomy was performed. At 10-year follow-up, 52.3% of the patients who underwent a single procedure and 94.2% of the patients who underwent multiple procedures had experienced pain relief; at 20-year follow-up, 41 and 100% of these patients, respectively, had experienced pain relief. No mortalities occurred. After the first procedure was performed, early pain recurrence (<6 mo) was observed in 123 patients (7.7%) and late pain recurrence was observed in 278 patients (17.4%). Complications included diminished corneal reflex in 91 patients (5.7%), masseter weakness and paralysis in 66 (4.1%), dysesthesia in 16 (1%), anesthesia dolorosa in 12 (0.8%), keratitis in 10 (0.6%), and transient paralysis of Cranial Nerves III and VI in 12 (0.8%). Permanent Cranial Nerve VI palsy was observed in two patients, cerebrospinal fluid leakage in two, carotid-cavernous fistula in one, and aseptic meningitis in one. CONCLUSION Percutaneous, controlled RF-TR represents a minimally invasive, low-risk technique with a high rate of efficacy. The procedure may safely be repeated if pain recurs.

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