Authors :
First Author: William Tatum, DO – Mayo Clinic Florida
Presenting Author: Brin Freund, MD – Mayo Clinic Florida
Aafreen Khan, MD – Mayo Clinic; Brin Freund, MD – Mayo Clinic; Charlene Gunakasera, MD – Mayo Clinic; Anteneh Feyissa, MD – Mayo Clinic; Joseph Sirven, MD – Mayo Clinic; eric middlebrooks, MD – Mayo Clinic; sanjeet grewal, MD – Mayo Clinic; kaisorn Chaichana, MD – Mayo Clinic; alfredo Quinones-Hinojosa, MD – Mayo Clinic
Rationale:
Awake craniotomy for intra-axial brain tumor resection relies on direct electrical stimulation (DES) for functional brain mapping (FBM) to define eloquent cortex and pathological borders. Electrocorticography (ECoG) enables identification of epileptiform activity and after-discharges during mapping but also reflects the integrity of the recording by stimulation-induced artifact. High-density customized grids are an advances beyond commercial strip electrodes during ECoG to provide real-time feedback to neurosurgeons to optimize safe surgical resection.
Methods:
All patients seen at Mayo Clinic Florida from January 10, 2020 to November 4, 2022 underwent awake craniotomy for resection of brain tumor. Direct electrocortical stimulation (DES) with one of two ECoG techniques included a strip compared with a custom circular grid. Patient demographics, tumor characteristics, and artifact and afterdischarge detection during stimulation are included for comparison. Chi-square testing (p= < .05) assessed categorical variables. We present preliminary data with ongoing sub-analysis.