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Conductive/Mixed Hearing Loss: Otosclerosis and Other Causes

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1.  On an audiogram, patients with otosclerosis commonly have conductive hearing loss with a greatest drop in the bone-conduction threshold at? 500 Hz 1000 Hz 2000 Hz 8000 Hz

2.  Circumferential collagen of the tympanic membrane relates to: Low frequency Mid frequency High frequency None of the above

3.  Radial collagen of the tympanic membrane relates to: Low frequency Mid frequency High frequency None of the above

4.  The ossicular chain in the middle ear consists of the: Malleus, Incus, and _____. Tympanic membrane Stapes Round window Scala tympani

5.  Otosclerosis is most common among: Asians African Americans Native Americans Caucasians

6.  What is the bilateral prevalence of otosclerosis? Less than 5% 20-50% 60-90% 100%

7.  During the early phase of otosclerosis, ____ frequency conductive hearing loss is typically seen on the audiogram. Low Middle High None of the above

8.  During the late phase of otosclerosis, ____ conductive hearing loss is typically seen on the audiogram. Low frequency only Middle frequency only High frequency only Flat CHL- through all frequencies

9.  On an otosclerosis audiogram, the depression in bone conduction threshold at 2000 Hz is called? Carrey’s Notch Carhart’s Notch Cathy’s Notch Cambria’s Notch

10.  Treatment of otosclerosis with fluoride: Histology shows no evidence of effectiveness. CT studies have confirmed resolution of lesions. Sodium fluoride therapy is used less commonly now, but it still has supporters. All of the above