You can manage bookmarks using lists, please log in to your user account for this.
Media type:
E-Article
Title:
Pure‐tone Audiometry in Otosclerosis: Insufficient Evidence for the Diagnostic Value of the Carhart Notch
Contributor:
Wegner, Inge;
Bittermann, Arnold J. N.;
Hentschel, Mayke A.;
van der Heijden, Geert J. M.;
Grolman, Wilko
Published:
Wiley, 2013
Published in:
Otolaryngology–Head and Neck Surgery, 149 (2013) 4, Seite 528-532
Language:
English
DOI:
10.1177/0194599813495661
ISSN:
0194-5998;
1097-6817
Origination:
Footnote:
Description:
ObjectiveTo evaluate whether the Carhart notch on pure‐tone audiometry is reliable as a diagnostic test for predicting otosclerosis in patients with conductive hearing loss.Data SourcesPubMed, Embase, the Cochrane Library, CINAHL, and Scopus.MethodsA systematic search was conducted. Studies reporting original study data were included. After assessment of directness of evidence and risk of bias of the selected articles, the prevalences and the positive and negative predictive values were extracted.ResultsA total of 1402 unique studies was retrieved. Three of these satisfied the eligibility criteria. One study provided direct evidence, while all studies carried moderate to high risk of bias. One study with moderate directness of evidence and high risk of bias was not further analyzed. In a study with a high directness of evidence, a high risk of bias, and a low prevalence of otosclerosis (8%) in patients with conductive hearing loss, the presence of a Carhart notch at 2000 Hz increased the risk of otosclerosis with 33%. In a second study with moderate directness of evidence, moderate risk of bias, and a high prevalence of otosclerosis (72%) in patients with a surgically confirmed congenital ossicular anomaly or otosclerosis, the presence of a Carhart notch at 2000 Hz increased the risk of otosclerosis with 2%.Conclusion and RecommendationAlthough there is insufficient high‐quality evidence regarding the diagnostic value of the Carhart notch, it seems it is a useful hint for the presence of otosclerosis, but it cannot be used to confirm a diagnosis of otosclerosis.