Early case series with placement of NeuroOne Evo stereoelectroencephalography depth electrodes and review of other Food and Drug Administration-approved products.

Background: Stereoelectroencephalography (SEEG) is a common diagnostic surgical procedure for patients with medically refractory epilepsy. We aimed to describe our initial experience with the recently released NeuroOne Evo SEEG electrode product (Zimmer Biomet, Warsaw, IN) and review technical specifications for other currently approved depth SEEG electrodes.

Methods: We performed a record review on the first five patients implanted with NeuroOne Evo SEEG electrode product using the robotic stereotactic assistance robot platform and described our surgical technique in detail. We recorded technical specifications of all currently Food and Drug Administration-approved SEEG electrodes for comparison.

Results: Our initial 5 surgical patients were reviewed. The average total time of operation was 92 min, with an average of 16.8 electrodes. The estimated time per electrode insertion was <2 min. There were no intracranial hemorrhages or hardware complications noted during monitoring. Monitoring provided diagnostic information in all patients, and removal and incision healing proceeded without issues.

Conclusion: NeuroOne SEEG electrodes can be implanted with efficiency and provide a valuable additional tool for the epilepsy surgeon. A tapered drill bit prevents the bolt from being placed beyond the inner cortex and may reduce the risk of brain contusion or inadvertent advancement of anchor bolts, and the electrode internal stylet also affords the potential to reduce the number of trajectory passes.

Mesh terms: Epilepsy, EEG, Drug-resistant Epilepsy, Intracranial EEG.