Abstract：Objective To investigate the outcome and complications of localization of epileptogenic foci via video electroencephalography monitoring through the subdural electrodes implanted by sphenotresia.Methods The data on 65 intractable epilepsy patients who underwent the implantation of subdural electrodes by sphenotresia and video electroencephalography monitoring between November 2006 and October 2013 was reviewed and analyzed.Results Sixty-five cases of epileptogenic foci were identified , so the localization rate was 100%(65/65). One case of complications occurred, which was focal brain contusion and laceration,so the rate of complications was 1.54%. One patient died, and the mortality rate was 1.54%. There were no severe and permanent neurological complications in any of the patients. All the 65 cases underwent resection of epileptogenic foci. The mean postoperative follow-up was (24.8±10.5)months. According to the Engel classification on surgical outcomes, the surgical outcomes were as follows: Engel Ⅰ, n=40, 61.54%; Engel Ⅱ, n=9, 13.85%; Engel Ⅲ, 12, 18.46%; Engel Ⅳ, n=4, 6.15%. Good seizure control (Engel class Ⅰ and Ⅱ) was obtained in 49 (75.38%) patients.Conclusions The effect of localization of epileptogenic foci via video electroencephalography monitoring through the subdural electrodes implanted by sphenotresia is significant.This approach is safe and feasible.The result of resection of epileptogenic foci localized by this method is good.
Fatma O, Ziya A, Taner T, et al. Surgical morbidity of invasive monitoring in epilepsy surgery: an experience from a single institution [J]. Turk Neurosurg, 2010, 20(3): 364-372.
[2]
Richard F S, Wu C Y. Complications of subdural and depth electrodes in 269 patients undergoing 317 procedures for invasive monitoring in epilepsy[J].Epilepsia, 2016, 57(10):1697-1708.
[3]
Sumiya S, Takeharu K, Rika I, et al. Risk factors for infective complications with long-term subdural electrode implantation in patients with medically intractable partial epilepsy [J]. World Neurosurg, 2015, 84(2): 320-326.
[4]
Dinitris G P, Shariff S. Bilateral intracranial electrodes for lateralizing intractable epilepsy: efficacy, risk, and outcome[J].Neurosurg, 2010, 66:274-283.
[5]
Jamie J V C, Gregory A W. Intracranial electroencephalography (EEG) with grid electrodes: techniques, complications and outcomes[J]. Neurosurg, 2008, 63(3): 498-506.
[6]
Chong H W,Julie B. Risk factors for complications during intracranial electrode recording in presurgical evaluation of drug resistant partial epilepsy[J]. Acta Neurochir (Wien), 2009, 151:37-50.
[7]
Brekelmans G J, Van Emde boas W, Velis D N, et al. Comparison of combined versus subdural or intracerebral electrodes alone in presurgical focus localization[J]. Epilepsia,1998, 39(12): 1290-1301.
[8]
Collin C T, Alexander I E, Paul J C, et al. Evolution of cranial epilepsy surgery complication rates: a 32-year systematic review and meta-analysis[J].Neurosurg, 2014, 120: 1415-1427.
[9]
Ravindra A, Francesco T M. Adverse events related to extraoperative invasive EEG monitoring with subdural grid electrodes: a systematic review and meta-analysis[J]. Epilepsia, 2013, 54(5):828-839.
[10]
Keith W,MacDougall, David A,et al. Supplementary implantation of intracranial electrodes in the evaluation for epilepsy surgery[J]. Epilepsy Res, 2009, 87: 95-101.
2018, Vol. 29 
