Intracranial EEG (IEEG) studies are performed in patients with intractable focal epilepsy when noninvasive studies do not provide adequate information for resective epilepsy surgery. The complication risk with IEEG implantation, albeit small, increases proportional to the number of electrodes implanted, with a hemorrhage rate of 0.2% per electrode, which is one reason to limit the number of implanted electrodes [1].
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