Ablação de canal auditivo vertical em um cão

Valente, Fernanda SoldatelliReis, Kauê Danilo Helene Lemos dosSoares, Frederico Aécio CarvalhoMottin, Tatiane da SilvaEmerson Antonio Contesini

Background: The external otitis is an inflammatory process that gets at the pinna and the external acoustic meatus of many animals; it can be a pathological process with acute, chronic or still recurrent chronic evolution. In dogs, the external otitis has high clinic importance. This condition could do stenosis or acoustic duct occlusion, inhibiting the ear’s cleanliness and the application of topical preparations as a way of medical treatment. The vertical acoustic duct’s ablation is indicated when all this are ill; however the horizontal duct keeps normal. This employment’s goal is report a case of ablation at vertical acoustic duct in a male dog, Husky Siberiano race, seven years old which showed chronic and recurrent external otitis. Case: A dog with chronic and recurrent otitis historic and some bids of medicated treatments, without success therapeutic, it was rescued at Hospital of Clínicas Veterinárias at Universidade Federal do Rio Grande do Sul. The owner also reported that the acoustic duct was completely closed and the canine was prostrate and aggressive. In the physical exam was observed stenosis of the right acoustic canal, where had a small orifice, approximately 2 mm, whereby purulent secretion was drained. The patient was submitted to screening’s exams like: complete CBC and skull radiography. In the presence of the historic and alterations observed in the clinical exam, it was routed to make an ablation of the vertical acoustic duct. The postoperative consisted of antibiotic, anti-inflammatory and analgesics. External point dehiscence happened, choosing healing it for second intention. At forty-fifth day postsurgical, the canine had already shown completely wound’s healing, without secretion by ostium at horizontal auditory duct and without any sign of pain to handle the ear. Discussion: The acoustic duct’s stenosis in the canine reported happened because of the chronicle external otitis that can change permanently the size and the external acoustic duct’s characteristics. The surgical proceeding made is an alternative technique that has been used when the entire vertical duct is found, grossly, distorted or filled in with a hyperplastic mucosa. The antibiotic used after surgery until the culture result and susceptibility testing it was amoxicillin with clavulanic acid, once which has already known the effectiveness on external and medium otitis treatment. The dehiscence of some points and the wound’s infection happened probably cause of the surgical manipulation of inflamed and septic tissues or still cause of the inappropriate dead space closing or inappropriate drainage. It was chosen the healing for second intention using in it an ointment composed by collagenase and chloramphenicol. It was used an ear solution in locus, containing anti-inflammatory, antibacterial and anesthetic to minimize the inflammation, infection and pain at external ear, even after surgical treatment. The discomfort and the pain to manipulate and touch at right ear were obvious on clinical treatment and also what it was identified by the owner like an aggressive animal’s behavior decreased substantially after the surgical proceeding, could be classified as absent at the revaluation in forty-fifth days postoperative. The vertical portion’s ablation of the acoustic duct is a technique little used and documented in veterinary medicine, once that has really indications points. The surgical proceeding showed to be important, because allow the secretions drainage, the application of topical agents in the horizontal acoustic duct and the pain’s control caused by chronicle and recurrent otitis in this patient.(AU)

1. otopatias
2. stenosis
3. ear diseases
4. optical surgery
5. cirurgia ótica
6. canine
7. estenose
8. canino