Spectrogram screening of adult EEGs is sensitive and efficient

Area of Science:

• Neuroscience
• Clinical Neurophysiology
• Medical Technology

Background:

• Continuous EEG (cEEG) monitoring is crucial for hospitalized adults but is time-intensive to interpret.
• Expert review of cEEG studies requires significant time commitment from neurophysiologists.
• Developing efficient protocols for cEEG analysis is essential for timely diagnosis and patient care.

Purpose of the Study:

• To quantitatively evaluate the practicality and time-effectiveness of using compressed spectral arrays (CSAs) for assisting expert review of cEEG studies.
• To compare the review times and detection rates of CSA-guided review versus conventional visual interpretation of cEEG.

Main Methods:

• Three neurophysiologists reviewed 118 cEEG studies, initially using a CSA-guided protocol and subsequently performing conventional page-by-page interpretation.
• Reviewers examined raw EEG data surrounding suspicious CSA segments and compared findings to a gold standard established by more experienced neurophysiologists.
• Study design involved comparing review times and the detection rates of seizures and other pathologic patterns between CSA-guided and conventional review methods.

Main Results:

• CSA-guided review reduced the average time to review 24 hours of cEEG data by 78% (8 ±4 minutes vs. 38 ±17 minutes, p < 0.005).
• The CSA-guided approach demonstrated high sensitivity for detecting various EEG abnormalities, including seizures (87.3%), periodic epileptiform discharges (100%), and rhythmic delta activity (97.1%).
• Even in studies with seizures, CSA-guided review remained significantly faster (10 ±4 minutes) than conventional review (44 ±20 minutes, p < 0.005).

Conclusions:

• Compressed spectral arrays (CSAs) offer a practical and time-effective protocol for screening continuous EEG (cEEG) studies.
• CSA-guided review significantly reduces cEEG interpretation time by approximately 78% while maintaining high sensitivity for critical findings.
• This method efficiently assists expert review, improving workflow for neurophysiologists analyzing cEEG data.