II. Definition
- Communication between inner and middle ear
III. Causes
- Direct blow to ear
- Scuba related Barotrauma
- Excessive straining on stooling, lifting, sneezing
IV. Pathophysiology
- Peripheral Cause of Vertigo
V. Symptoms
- Vertigo
- Associated with Hearing Loss
VI. Signs: Hennebert's Sign
- Pressure applied to tragus and external auditory meatus
- Pneumatic Otoscopy may also induce
- Results in Vertigo or Nystagmus when fistula present