Quantifying the Carhart effect in otosclerosis

The Carhart effect consists of a depression in bone conduction thresholds in the presence of a conductive hearing loss. However, the mathematical relationship between the degree of conductive hearing loss and the degree of depression of bone conduction has not before been described. We have reviewed...

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Bibliographic Details
Published inClinical otolaryngology and allied sciences Vol. 20; no. 3; p. 258
Main Authors Cook, J A, Krishnan, S, Fagan, P A
Format Journal Article
LanguageEnglish
Published England 01.06.1995
Subjects
Adolescent
Adult
Aged
Audiometry
Auditory Threshold
Bone Conduction
Female
Hearing Loss, Conductive - etiology
Hearing Loss, Conductive - physiopathology
Humans
Male
Middle Aged
Otosclerosis - complications
Otosclerosis - diagnosis
Otosclerosis - physiopathology
Stapes - physiopathology
Stapes Surgery
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Summary:The Carhart effect consists of a depression in bone conduction thresholds in the presence of a conductive hearing loss. However, the mathematical relationship between the degree of conductive hearing loss and the degree of depression of bone conduction has not before been described. We have reviewed pre- and post-operative pure-tone audiograms performed on 102 consecutive patients having stapedectomy in an attempt to identify relationships between changes in bone conduction and air conduction and air-bone gap closure. Significant linear relationships were found between bone conduction and air conduction at 0.5. 1, 2 & kHz. Bone conduction was linearly related to air bone gap closure at 2 kHz.
ISSN:0307-7772
DOI:10.1111/j.1365-2273.1995.tb01862.x