A 3 yr old male castrated Labrador retriever presented for evaluation and treatment of bilateral atresia of the external ear canals. The owners reported that the dog could hear only loud and high-pitched noises. Computed tomography of the head revealed intact vertical and horizontal ear canals filled with debris and a debris-filled right tympanic bulla. Air- and bone-conducted brainstem auditory evoked response (BAER) testing revealed an elevated response threshold to air-conducted stimuli and greater amplitude waveforms evoked by bone-conducted stimuli. The ear canals were surgically corrected via lateral ear canal resection. BAER testing postoperatively revealed a decrease in the air-conducted BAER threshold. This case is an example of the use of bone-conducted BAER testing to aid in the diagnosis of conductive deafness, and in determining prognosis for normal hearing after surgical treatment of external ear canal atresia.
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September/October 2011
Case Reports|
September 01 2011
BAER Testing in a Dog with Bilateral External Ear Canal Atresia
Cona Anwer, DVM;
Cona Anwer, DVM
*
Department of Clinical Studies, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA.
Correspondence: canwer@ucdavis.edu (C.A.)
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Tobias Schwarz, Dr.med.vet., DACVR;
Tobias Schwarz, Dr.med.vet., DACVR
†
Department of Clinical Studies, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA.
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Susan W. Volk, VMD, PhD, DACVS;
Susan W. Volk, VMD, PhD, DACVS
Department of Clinical Studies, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA.
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Charles Vite, DVM, PhD, DACVIM (Neurology)
Charles Vite, DVM, PhD, DACVIM (Neurology)
Department of Clinical Studies, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA.
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J Am Anim Hosp Assoc (2011) 47 (5): 370–374.
Citation
Cona Anwer, Tobias Schwarz, Susan W. Volk, Charles Vite; BAER Testing in a Dog with Bilateral External Ear Canal Atresia. J Am Anim Hosp Assoc 1 September 2011; 47 (5): 370–374. doi: https://doi.org/10.5326/JAAHA-MS-5545
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