Key result
Dry-electrode EEG yields poorer signal quality than standard EEG, but maintains ~87% interpretability.
Why the study?
The usefulness of a prototype battery-powered dry electrode system EEG recording headset in Veteran patients compared to standard EEG was evaluated.
Does a prototype dry electrode system EEG headset provide comparable technical quality to standard EEG in Veteran patients?
Cross-Sectional (n=21)
Blinded
Does a prototype dry electrode system EEG headset provide comparable technical quality to standard EEG in Veteran patients?
Absolute Event Rate: 2.41% vs 1.25%
p-value: p=< 0.0001
A dry electrode EEG headset provides faster setup and better patient comfort with interpretable, though lower quality, recordings compared to standard EEG.
Prototype dry electrode EEG feasible in Veterans; leaves open larger validation trials before clinical adoption.
OBJECTIVE: This purpose of this study was to evaluate the usefulness of a prototype battery-powered dry electrode system (DES) EEG recording headset in Veteran patients by comparing it with standard EEG. METHODS: Twenty-one Veterans had both a standard electrode system recording and DES recording in nine different patient states at the same encounter. Setup time, patient comfort, and subject preference were measured. Three experts performed technical quality rating of each EEG recording in a blinded fashion using the web-based EEGnet system. Power spectra were compared between DES and standard electrode system recordings. RESULTS: The average time for DES setup was 5.7 minutes versus 21.1 minutes for standard electrode system. Subjects reported that the DES was more comfortable during setup. Most subjects (15 of 21) preferred the DES. On a five-point scale (1-best quality to 5-worst quality), the technical quality of the standard electrode system recordings was significantly better than for the DES recordings, at 1.25 versus 2.41 (P < 0.0001). But experts found that 87% of the DES EEG segments were of sufficient technical quality to be interpretable. CONCLUSIONS: This DES offers quick and easy setup and is well tolerated by subjects. Although the technical quality of DES recordings was less than standard EEG, most of the DES recordings were rated as interpretable by experts. SIGNIFICANCE: This DES, if improved, could be useful for a telemedicine approach to outpatient routine EEG recording within the Veterans Administration or other health system.
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Halford et al. (2016) conducted a cross-sectional in Patients requiring EEG (n=21). Dry electrode system (DES) EEG recording headset vs. Standard electrode system recording was evaluated on Technical quality rating on a five-point scale (1-best to 5-worst) (p=< 0.0001). A prototype dry electrode system EEG headset yielded lower technical quality scores than standard EEG (2.41 vs 1.25; P<0.0001), although 87% of recordings were deemed interpretable.
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