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Tympanogram types C and A

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Tympanogram types C and A

Şəkillər
04.05.2012 • Sonuncu dəyişiklik 09.08.2011
Turku University Hospital/Department of Paediatrics AinoRuohola

Tympanogram types C (left) and A (right). Different tympanogram types:

  • type A (normal tympanogram): a clear peak at the ear canal pressure that equals to the tympanic cavity pressure
  • type B = a flat, almost horizontal line: middle ear effusion is probable (picture )
  • type C: pressure readings below –200 dPa indicate poor ventilation of the middle ear.
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