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Updated: Feb 19, 2026
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Published on: March 31, 2023
Subdural electrode-associated complications: a 20-year experience.
Kostas N Fountas1, Joseph R Smith
1Department of Neurosurgery, Medical College of Georgia, Augusta, GA, USA. knfountasmd@excite.com
Subdural electrode implantation for epilepsy monitoring is generally safe, but complications like hematomas and infections can occur. Early identification and management of these risks are crucial for patient safety.
Area of Science:
- Neurosurgery
- Epileptology
- Neurology
Background:
- Subdural strip and grid electrodes are frequently used for invasive epilepsy evaluation.
- While generally safe, implantation can lead to complications.
Purpose of the Study:
- To retrospectively analyze complications associated with subdural electrode implantation.
Main Methods:
- 185 patients (ages 16-48) underwent subdural grid/strip implantation.
- Electrodes were implanted under general anesthesia; monitoring lasted 2-25 days.
- Follow-up ranged from 24-60 months.
Main Results:
- Most common complication: epidural hematoma (1.6%).
- Other complications included subdural hematoma (1.1%), brain edema (1.1%), infection (1.1%), and transient aphasia (1.1%).
- Fatal outcomes occurred in 1.1% of patients; nonhabitual seizures in 2.7%.
Conclusions:
- Understanding and prompt management of complications are key.
- Minimizing risks associated with subdural electrode implantation is achievable.
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