13. Differentiate between conduction deafness and sensorineural deafness, and st

Question

13. Differentiate between conduction deafness and sensorineural deafness, and state several examples of each type. 14. Define otitis media and common microorganisms causing the infection. 15. Discuss the treatment options for otitis media. 16. Name the structures involved in otitis externa and the possible causative agents. 17. Briefly outline the pathophysiology and describe the manifestations of Ménière's syndrome. 18. Identify individuals who are at high risk for developing the following conditions: i. otitis media: i. otitis externa: iii. Ménière's syndrome

Explanation / Answer

13) Difference between sensorineural deafness and Conduction deafness

sensorineural deafness refers to hearing loss that is the result of nerve damage. It takes place in the inner ear or the cochlea or anywhere along the nerve pathways that connect the inner ear to the brain. it is permenant hearing loss Examples: acoustic neuroma and meningioma

Conductive hearing loss affects the outer ear. It happens when sound waves are not traveling efficiently from the outside world through to the outer or middle ear.The trouble can occur anywhere in the outer ear.Conductive deafness is treatable and therefore it is temporary something is physically blocking the ear canal, which prevents you from hearing well. As with sensorineural hearing loss, Examples tiny ear bones that conduct sounds, infectious material etc

14 Otitis media is an infection of the middle ear or it is a group of inflammatory diseases of the middle ear which is located behind the eardrum. There are two main types of otitis media viz:

acute otitis media (AOM) and otitis media with effusion (OME)

The microorganisms which causes the infection are as under:

Otitis media may be caused by either viruses or bacteria. Viral infections account for approximately 15 percent of cases. The majority of other cases are caused by a variety of bacteria. The three most common bacteria are Streptococcus pneumoniae Haemophilus influenzae and Moraxella catarrhalis

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