Using a standalone ear-EEG device for focal-onset seizure detection

Area of Science:

• Neuroscience and Biomedical Engineering
• Development of novel wearable neurophysiological monitoring systems

Background:

• Current limitations in long-term neurophysiological monitoring for seizure detection outside clinical settings.
• Need for comfortable, reliable, and practical devices for continuous electroencephalography (EEG) recording.
• Development of a discreet, unobtrusive in-ear sensing system for long-term EEG.

Purpose of the Study:

• To systematically compare the seizure detection capability of in-ear EEG with intracranial EEG.
• To compare in-ear EEG with simultaneously recorded scalp EEG for seizure detection.
• To evaluate the feasibility and patient tolerance of a novel in-ear EEG system.

Main Methods:

• Clinical feasibility study involving 20 patients with refractory focal epilepsy.
• Simultaneous recording of 1255 hours of ear-EEG data alongside scalp or intracranial EEG.
• Blinded, independent review of ear-EEG signals by two epileptologists for seizure detection.

Main Results:

• Ear-EEG system detected 86.4% of seizures identified by gold-standard EEG modalities.
• Achieved a low false detection rate of 0.1 per day, suitable for ambulatory monitoring.
• High patient tolerance reported, with minor adverse events primarily in the scalp EEG group.

Conclusions:

• Ear-EEG shows potential for routine, prolonged, remote neurophysiological data collection.
• Enables real-time detection of paroxysmal events like seizures and epileptiform discharges.
• May aid clinicians in epilepsy diagnosis, treatment efficacy assessment, and medication management.