II. Definition

  1. Communication between inner and middle ear

III. Causes

  1. Direct blow to ear
  2. Scuba related Barotrauma
  3. Excessive straining on stooling, lifting, sneezing

IV. Pathophysiology

  1. Peripheral Cause of Vertigo

V. Symptoms

  1. Vertigo
  2. Associated with Hearing Loss

VI. Signs: Hennebert's Sign

  1. Pressure applied to tragus and external auditory meatus
    1. Pneumatic Otoscopy may also induce
  2. Results in Vertigo or Nystagmus when fistula present

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