Craniotomy Size for Subdural Grid Electrode Placement in Invasive Epilepsy Diagnostics.

Area of Science:

• Neurosurgery
• Epilepsy Surgery
• Minimally Invasive Techniques

Background:

• Traditionally, large craniotomies were used for subdural grid electrode placement.
• Microneurosurgeons increasingly favor patient-tailored, minimally invasive approaches.
• Craniotomy size data for this procedure was previously unreported.

Observation:

• 58 patients with focal epilepsies underwent navigation-based, patient-tailored craniotomies for subdural grid implantation.
• Craniotomy sizes were retrospectively measured and analyzed.
• Comparison was made with 16 historical control patients.

Findings:

• Patient-tailored craniotomies averaged 28 cm², significantly smaller than historical controls (65 cm²).
• Comparable numbers of electrodes were implanted with shorter operation times and reduced complications.
• Temporal lobe diagnostics utilized even smaller craniotomies (21 cm²).

Implications:

• Advocates for patient-tailored, minimally invasive approaches in epilepsy surgery.
• Demonstrates feasibility and benefits of smaller craniotomies for subdural electrode placement.
• Establishes a precedent for measuring and reporting craniotomy sizes in neurosurgical procedures.