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Carhart notch and electric bone-conduction audiometry.

https://arctichealth.org/en/permalink/ahliterature46554
Source
Scand Audiol. 1994;23(2):139-41
Publication Type
Article
Date
1994
Author
K. Laitakari
H. Löppönen
Author Affiliation
Department of Otolaryngology, University of Oulu, Finland.
Source
Scand Audiol. 1994;23(2):139-41
Date
1994
Language
English
Publication Type
Article
Keywords
Adult
Audiometry
Bone Conduction
Comparative Study
Ear, Middle - physiopathology
Electric Stimulation
Female
Hearing Loss, Sensorineural - etiology - physiopathology
Humans
Male
Middle Aged
Otosclerosis - complications - physiopathology
Stapes Surgery
Abstract
The Carhart notch is a depression in the bone-conduction audiogram of patients with clinical otosclerosis. The middle frequencies from 0.5 to 2 kHz, which correspond to the resonance frequency of the middle ear, can be substantially improved following successful stapes surgery. Twenty-nine consecutive patients with clinical otosclerosis were tested 2 weeks before and 7 months after stapes surgery with conventional air-conduction (AC) and bone-conduction (BC) audiometry and electric bone-conduction (EBC) audiometry using an Audimax 500 audiometer. The BC thresholds improved at 0.5-2.0 kHz corresponding to the Carhart notch. On average, the EBC thresholds remained more stable, showing no Carhart phenomenon, which supports the concept that EBC stimulation is not entirely equivalent to conventional BC audiometry, but has a different mode of action on the inner ear.
PubMed ID
8085115 View in PubMed
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[The results of the surgical treatment of otosclerosis in the elderly subjects].

https://arctichealth.org/en/permalink/ahliterature258719
Source
Vestn Otorinolaringol. 2014;(3):17-9
Publication Type
Article
Date
2014
Author
L A Kulakova
E P Poliakova
I V Bodrova
A S Lopatin
Source
Vestn Otorinolaringol. 2014;(3):17-9
Date
2014
Language
Russian
Publication Type
Article
Keywords
Aged
Audiometry - methods
Female
Hearing Loss - diagnosis - etiology - physiopathology - surgery
Humans
Male
Otosclerosis - complications - physiopathology - surgery
Retrospective Studies
Russia
Stapes - pathology - physiopathology
Stapes Surgery - methods - rehabilitation - statistics & numerical data
Treatment Outcome
Abstract
The objective of the present study was to evaluate the effectiveness of the surgical treatment of otosclerosis in the subjects of advanced age. The medical histories of 19 patients aged above 65 years (20 ears) presenting with otosclerosis were available for the retrospective analysis. All of them had undergone surgical interventions (a total of 22 ones or 4.49% of the 489 operations performed between 2001 and 2012). The audiometric assessment was made at four wavelengths (0.5, 1, 2, and 4 kHz). Primary surgery (n=18) was preceded by the determination of the high air and bone conductivity thresholds (76.18 dB and 42.15 dB respectively), with the mean bone to air interval (BAI) being 33.99 dB. The surgical treatment resulted in the improvement of hearing; in 83.33% of the cases, BAI was reduced to 10 dB or below this value. It is concluded that the surgical intervention on the stirrup bone for the treatment of otosclerosis in the patients above 65 years of age is a safe and efficacious method despite marked hearing impairment in this group of patients.
PubMed ID
25246202 View in PubMed
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