Document Detail

Audit of EEG reporting temporal abnormalities.
MedLine Citation:
PMID:  21059545     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: To ensure the overall quality of our electroencephalogram (EEG) laboratory, we decided to perform an audit of EEGs interpreted at our institution, focusing initially on EEGs reporting temporal abnormalities.
METHODS: Reports of all EEGs performed between January 1st and June 30th, 2006 were reviewed in order to identify tracings mentioning abnormalities in the temporal regions. These records were then independently reviewed by two epileptologists on two distinct occasions, separated by an interval of at least six months. If the recording was considered normal after this process, the cause for misinterpretation was identified and the patient's chart was reviewed to determine if he was epileptic or not based on available evidence until June 2009.
RESULTS: In the first half of 2006, 143 out of 773 EEGs mentioned temporal abnormalities (18.5%). In general, intra- and interrater agreement ratios between our two epileptologists were moderate to substantial for normality, presence of epileptic activity and presence of slowing. Forty-five recordings (31.5%) were reported as normal independently by them on two distinct sittings six months apart. The most common causes for misinterpretation were the presence of benign epileptiform variants, normal sharply contoured patterns of somnolence or hyperventilation. Chart review confirmed that most were non-epileptic patients (60% non-epileptic, 27% epileptic, 13% unknown).
CONCLUSION: Moderate to substantial intra- and interrater agreement as well as frequent misinterpretation of physiological variants indicate that some corrective measures need to be implemented to improve the consistency of EEG interpretation amongst our group of electroencephalographers.
Dang Khoa Nguyen; Marie-Eve Girard; Patrick Cossette; Jean-Marc Saint-Hilaire
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Canadian journal of neurological sciences. Le journal canadien des sciences neurologiques     Volume:  37     ISSN:  0317-1671     ISO Abbreviation:  Can J Neurol Sci     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-11-09     Completed Date:  2011-01-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0415227     Medline TA:  Can J Neurol Sci     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  819-25     Citation Subset:  IM    
Service de neurologie, Centre hospitalier de l'Université de Montréal - Hôpital Notre-Dame, Montréal, Québec, Canada.
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MeSH Terms
Aged, 80 and over
Clinical Audit* / statistics & numerical data
Electroencephalography / standards*
Epilepsy / pathology*,  physiopathology
Follow-Up Studies
Middle Aged
Models, Statistical
Retrospective Studies
Temporal Lobe / physiopathology*
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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