UPSC-CMS 2012 - ENT PYQs Practice Questions

Q: Which one of the following conditions produces sensorineural deafness ?

Mixed otosclerosis. ***Mixed otosclerosis*** - **Otosclerosis** is a bone remodeling disease primarily affecting the **ossicles** and **otic capsule**. - **Mixed otosclerosis** involves both **stapes fixation (conductive component)** and **cochlear involvement (sensorineural component)**. - Among the given options, this is the **only condition that produces sensorineural hearing loss**, although it presents as a mixed hearing loss with both conductive and sensorineural components. - The **cochlear otosclerosis** component causes the sensorineural deafness through involvement of the **otic capsule** and **cochlear structures**. *Atelectatic middle ear* - This condition involves the collapse of the **tympanic membrane** onto the ossicles due to **negative middle ear pressure**. - It causes **pure conductive hearing loss** by impairing sound transmission through the middle ear, with no sensorineural component. *Eustachian tube blockage* - Blockage of the **Eustachian tube** leads to **negative pressure** in the middle ear space. - This results in **pure conductive hearing loss** due to impaired movement of the tympanic membrane and ossicles, with no sensorineural component. *Tympanic membrane rupture* - A rupture in the **tympanic membrane** creates a direct opening between the external ear canal and the middle ear. - This condition causes **pure conductive hearing loss** by disrupting the normal sound conduction mechanism, with no sensorineural component. [Practice more ENT PYQs on OnCourse]

Question 1

The treatment of choice for a mastoid fracture with immediate complete facial nerve paralysis is

Accepted Answer

Nerve decompression

Answer

Sling operation

Answer

Steroid therapy

Answer

Mastoidectomy with nerve grafting

Question 2

Which one of the following conditions produces sensorineural deafness ?

Accepted Answer

Mixed otosclerosis

Answer

Atelectatic middle ear

Answer

Eustachian tube blockage

Answer

Tympanic membrane rupture

UPSC-CMS 2012 — ENT