Feasibility of stereo electroencephalogram (SEEG) with little to no scalp bone; a case report

Wabulya, Angela; Nacionales, David; Shin, Hae Won; Abumoussa, Andrew; Hadar, Eldad

doi:10.1016/j.ebr.2020.100394

Epilepsy & Behavior Reports

2021

DOI: 10.1016/j.ebr.2020.100394

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Feasibility of stereo electroencephalogram (SEEG) with little to no scalp bone; a case report

Angela Wabulya

David Nacionales

Hae Won Shin

et al.

Abstract: Highlights SEEG is feasible with little to no skull to anchor a bolt. To the best of our knowledge, this is the first report describing SEEG electrode placement with no skull bone.

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2024

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Accuracy of Boltless Frame-Based Stereo-Electroencephalography Electrode Implantation

Fujita,

Khoo,

Kimoto

et al. 2024

Operative Neurosurgery

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BACKGROUND AND OBJECTIVES: Boltless implantation of stereo-electroencephalography electrode is a useful alternative especially when anchor bolt is not available such as in country with limited resources or is less appropriate such as placement in patients with thin skull or at the occiput area, despite some drawbacks including potential dislodgement. While the accuracy of implantation using anchor bolt is well-studied, data on boltless implantation remain scarce. This study aimed to reveal the accuracy, permissible error for actual placement of electrodes within the grey matter, and delayed electrode dislodgement in boltless implantation. METHODS: A total of 120 electrodes were implanted in 15 patients using a Leksell Stereotactic G Frame with each electrode fixed on the scalp using sutures. Target point error was defined as the Euclidean distance between the planned target and the electrode tip on immediate postimplantation computed tomography. Similarly, delayed dislodgement was defined as the Euclidean distance between the electrode tips on immediate postimplantation computed tomography and delayed MRI. The factors affecting accuracy were evaluated using multiple linear regression. The permissible error was defined as the largest target point error that allows the maximum number of planned gray matter electrode contacts to be actually placed within the gray matter as intended. RESULTS: The median (IQR) target point error was 2.6 (1.7-3.5) mm, and the permissible error was 3.2 mm. The delayed dislodgement, with a median (IQR) of 2.2 (1.4-3.3) mm, was dependent on temporal muscle penetration (P = 5.0 × 10−4), scalp thickness (P < 5.1 × 10−3), and insertion angle (P = 3.4 × 10−3). CONCLUSION: Boltless implantation of stereo-electroencephalography electrode offers an accuracy comparable to those using anchor bolt. During the planning of boltless implantation, target points should be placed within 3.2 mm from the gray-white matter junction and a possible delayed dislodgement of 2.2 mm should be considered.

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Accuracy of Boltless Frame-Based Stereo-Electroencephalography Electrode Implantation

Fujita,

Khoo,

Kimoto

et al. 2024

Operative Neurosurgery

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Feasibility of stereo electroencephalogram (SEEG) with little to no scalp bone; a case report

Abstract: Highlights SEEG is feasible with little to no skull to anchor a bolt. To the best of our knowledge, this is the first report describing SEEG electrode placement with no skull bone.

Cited by 1 publication

References 7 publications

Accuracy of Boltless Frame-Based Stereo-Electroencephalography Electrode Implantation

Accuracy of Boltless Frame-Based Stereo-Electroencephalography Electrode Implantation

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