Causes of hearing loss in AAD

Conductive

1)      Perforation

2)      Ossicular discontinuity

3)      Ossicular fixation

4)      Fluid in middle ear

5)      Cholesteatoma flakes blocking RW or OW

6)      TM retraction / atelectasis

7)      Otitis externa

8)      Discharge filling EAC

SNHL

1)      Peri labyrinthine fistula

2)      Labyrinthitis

3)      Toxins going thru RW & OW into inner ear

4)      Ototoxic medication use e.g gentamycin ear drops

5)      Temporal lobe abcess