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Otitis Externa - Cat and Dog (view source)
Revision as of 07:30, 2 September 2011
, 07:30, 2 September 2011no edit summary
<u>Foreign bodies</u>: grass seeds, grass awns,
<u>Foreign bodies</u>: grass seeds, grass awns,
<u>Abnormal epidermal turnover or sebum production</u>: endocrinopathy, nutritional problems, sebaceous adenitis
<u>Abnormal epidermal turnover or sebum production</u>: [[Seborrhea|seborrhea]], endocrinopathy, nutritional problems, sebaceous adenitis
<u>Primary keratinisation defects</u>: idiopathic seborrhoea
<u>Primary keratinisation defects</u>: [[Seborrhea|idiopathic seborrhoea]]
<u>Autoimmune disease</u>: pemphigus foliaceus
<u>Autoimmune disease</u>: pemphigus foliaceus
If an '''allergy''' is suspected, various tests such as intra-dermal allergy testing could be performed in order to provide a long-term means of control.
If an '''allergy''' is suspected, various tests such as intra-dermal allergy testing could be performed in order to provide a long-term means of control.
==Treatment and control==
==Medical Treatment and Control==
Underlying '''predisposing, primary and perpetuating factors''' should be corrected.
Underlying '''predisposing, primary and perpetuating factors''' should be corrected.
'''Astringents''' can be used for dogs who are used to swimming to minimise maceration. Hairs can be regularly '''plucked''' from the inside of the ear to improve ventilation.
'''Astringents''' can be used for dogs who are used to swimming to minimise maceration. Hairs can be regularly '''plucked''' from the inside of the ear to improve ventilation.
==Surgical Treatment==
Treatment of otitis externa should always be '''medical initially'''.
'''Palpation''' of the ear canals and '''radiographs''' will help determine if there are chronic changes to the ear canals such as calcification.
===Lateral wall resection===
This can be performed at an early stage to increased '''drainage and ventilation''' of the external ear canal.
It should be used in cases where otitis has recurred despite appropriate medical management.
The '''horizontal canal must be intact''' for this surgery to be effective, and irreversible canal stenosis and end-stage otitis can lead to failure of the procedure.
===Total Ear Canal Ablation and Lateral Bulla Osteotomy===
This involves the '''complete removal''' of all external ear tissue except the pinna, and also removal of infected tissue within the middle ear.
It is a '''salvage''' procedure that should only be performed in otitis externa cases that are chronic and endstage.
It can also be performed if otitis externa is still present following a lateral wall resection.
{{Learning
|flashcards = [[Small Animal Dermatology Q&A 19]]
}}
==References==
==References==