Posts Tagged ‘Stereoelectroencephalography’
Background: Despite the use of invasive subdural recording, failure to localize or resect the epileptogenic zone (EZ) occurs. Potential causes for this include EZ originating outside of the subdural grid coverage area, involvement of eloquent cortex, or complications requiring removal of electrodes without seizure localization. No study has examined the safety and efficacy of stereoelectroencephalography (SEEG) after subdural grid placement.
Objective: To determine the efficacy of SEEG in patients who have previously undergone subdural grid placement.
Methods: A prospective analysis was performed on 14 patients who had subdural grid evaluation and underwent subsequent SEEG monitoring. The follow-up period after the SEEG guided resections ranged from 11 months to 34 months with average follow-up of 20.1 months. MRI findings, EZ localization, outcomes, type of surgery, and perioperative complications were evaluated.
Background: Stereoelectroencephalography (SEEG) methodology, originally developed by Talairach and Bancaud, is progressively gaining popularity for the presurgical invasive evaluation of drug-resistant epilepsies.
Objective: To describe recent SEEG methodological implementations carried out in our center, to evaluate safety, and to analyze in vivo application accuracy in a consecutive series of 500 procedures with a total of 6496 implanted electrodes.
Methods: Four hundred nineteen procedures were performed with the traditional 2-step surgical workflow, which was modified for the subsequent 81 procedures. The new workflow entailed acquisition of brain 3-dimensional angiography and magnetic resonance imaging in frameless and markerless conditions, advanced multimodal planning, and robot-assisted implantation. Quantitative analysis for in vivo entry point and target point localization error was performed on a sub–data set of 118 procedures (1567 electrodes).