Clinical Scorecard: Challenges and Solutions in Stereoelectroencephalography Techniques Utilizing the Leksell Vantage Frame

At a Glance

Key Highlights

• SEEG uses 6–15 depth electrodes implanted stereotactically to map seizure onset zones and surrounding margins.
• The Leksell Vantage frame is a lightweight, MRI-compatible stereotactic frame facilitating precise electrode placement with minimized RF heating.
• Preoperative planning with 3D MRI and CT angiography is essential to avoid vascular injury and optimize electrode trajectories.

Guideline-Based Recommendations

Diagnosis

• Use 3D MRI (T1-weighted and FLAIR) and CT angiography for preoperative planning and co-registration to identify avascular trajectories.
• Place electrodes targeting suspected seizure onset zones and surrounding areas to delineate resection margins.

Management

• Perform SEEG electrode implantation under general anesthesia using the Leksell Vantage frame and stereotactic instruments.
• Avoid entry points anterior to the hairline for cosmetic reasons unless targeting anterior insula, especially in children.
• Plan electrode trajectories perpendicular to skull and cortex to minimize deviation and prevent drill bit skiving.
• Avoid sulci and areas with brain atrophy or previous surgical cavities to reduce hemorrhage risk.

Monitoring & Follow-up

• Conduct post-implantation CT scan to verify electrode placement and detect complications such as bleeding.

Risks

• Approximately 1% risk of clinically relevant hemorrhage, potentially underreported.
• Electrode deviation risk increases with longer transcerebral trajectories and non-perpendicular insertion angles.
• Frame setup conflicts may require intraoperative trajectory adjustments, increasing operative time.

Patient & Prescribing Data

Patients with pharmaco-resistant epilepsy undergoing SEEG for seizure localization

SEEG electrode implantation using the Leksell Vantage frame allows precise targeting of epileptogenic zones with MRI compatibility and reduced procedural complications when planned carefully.

Clinical Best Practices

• Interdisciplinary planning involving neurosurgeon and neurologist to confirm working hypotheses based on seizure semiology and scalp EEG.
• Use lubricated components and correct orientation of frame axes (x, y, z) to avoid mechanical conflicts during electrode placement.
• Measure electrode insertion angle and bone thickness preoperatively to optimize trajectory and fixation with bone anchors.
• Avoid sulcal and vascular structures by detailed imaging and trajectory planning to minimize hemorrhagic complications.
• Employ a preoperative planning routine specific to the Leksell Vantage frame to prevent restricted lead positions and reduce intraoperative adjustments.

References

• Leksell Vantage Stereotactic System - Elekta
• Meta-analysis on SEEG placement accuracy by Vakharia et al.
• Systematic review on hemorrhage risk in SEEG by Mullin et al.