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Audiogram - Wikipedia
https://en.wikipedia.org/wiki/Audiogram#:~:text=An%20audiogram%20showing%20typical%20slight%20hearing%20variation.%20Otosclerosis,of%20either%20otosclerosis%20or%20a%20congenital%20ossicular%20anomaly.
Audiological Evaluation of the Patient with Otosclerosis ...
https://entokey.com/audiological-evaluation-of-the-patient-with-otosclerosis/
(B) Pure tone audiogram of a patient who has a central perforation. There is no notch at 2000 Hz. (Adapted from Beales, PH. Otosclerosis . Bristol; John Wright and Sons: 1981. Used with permission.) Carhart’s notch is thought to be typical of otosclerosis (Carhart 1950, 1962). It is characterized by the elevation of bone conduction thresholds of approximately 5 dB …
Abnormal Audiograms in Ear Pathology
https://entpa.org/resources/Pictures/2016%20ENT%20for%20the%20PA-C/Presentations/Abnormal%20audiograms%20in%20ear%20pathology%20-%20Klingenberg.pdf
– Describe the audiogram by configuration from least amount of hearing loss to the most (ex: mild to severe) – Pure tone average is 500 Hz, 1000 Hz, and 2000 Hz added and divided by 3. Degree of hearing loss Degree of hearing loss: • 0‐15 dB WNL • 16‐25 dB Slight • 26‐40 dB Mild
Audiological evaluation of the patient with otosclerosis
https://drchrisdesouza.com/ENT-surgeon/audiological-investigation-of-otosclerosis.htm
The typical pattern of cochlear otosclerosis in the early stages is the “cookie bite”pattern where the greatest degree of hearing loss occurs in the mid-frequency hearing range and is characteristically a mixed hearing loss.(Hannley 1993). Tinnitus is usually present in a large percentage of patients.
Carhart notch and electric bone-conduction audiometry
https://pubmed.ncbi.nlm.nih.gov/8085115/
Carhart notch and electric bone-conduction audiometry. 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.
Audiological evaluation of patients with otosclerosis
https://pubmed.ncbi.nlm.nih.gov/17245032/
Standard clinical immittance measurements are used to confirm (or exclude) otosclerosis, the typical pattern being a normally shaped tympanogram and absent stapedial reflexes. Multifrequency tympanometry adds little information. Aside from establishing a preoperative diagnosis, audiological evaluation provides quantification of hearing loss, upon which the …
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