{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T04:25:34Z","timestamp":1773030334260,"version":"3.50.1"},"reference-count":32,"publisher":"American Animal Hospital Association","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2011]]},"abstract":"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.<\/jats:p>","DOI":"10.5326\/jaaha-ms-5545","type":"journal-article","created":{"date-parts":[[2011,8,19]],"date-time":"2011-08-19T00:31:55Z","timestamp":1313713915000},"page":"370-374","source":"Crossref","is-referenced-by-count":4,"title":["BAER Testing in a Dog with Bilateral External Ear Canal Atresia"],"prefix":"10.5326","volume":"47","author":[{"given":"Cona","family":"Anwer","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tobias","family":"Schwarz","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Susan W.","family":"Volk","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Charles","family":"Vite","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"3280","reference":[{"issue":"4","key":"bib1","series-title":"Vet Clin North Am Small Anim Pract","first-page":"913","article-title":"Electrodiagnostic evaluation of auditory function","volume":"18","author":"Sims","year":"1988","unstructured":"Sims\n MH\n \n . 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Aust Vet J1997;75(1):18\u201320."},{"key":"bib7","series-title":"Wien Tierarztl Mschr","first-page":"276","article-title":"Unilateral congenital malformation of the meatus acusticus externus in a dog (Einseitige Missbildung des Meatus acusticus externus bei einem Hund)","volume":"85","author":"Lorinson","year":"1998","unstructured":"Lorinson\n D\n , NellB. Unilateral congenital malformation of the meatus acusticus externus in a dog (Einseitige Missbildung des Meatus acusticus externus bei einem Hund). Wien Tierarztl Mschr1998;85:276\u20138."},{"key":"bib8","series-title":"Canine Pract","first-page":"9","article-title":"Bilateral vertical ear canal resection to correct atresia of the external acoustic meatus in a dog","volume":"17","author":"Harari","year":"1992","unstructured":"Harari\n J\n , MooreM, DupuisJ. Bilateral vertical ear canal resection to correct atresia of the external acoustic meatus in a dog. Canine Pract1992;17:9\u201312."},{"issue":"2","key":"bib9","series-title":"J Small Anim Pract","first-page":"88","article-title":"Atresia of the distal external acoustic meatus in a Bouvier des Flandres","volume":"42","author":"House","year":"2001","unstructured":"House\n A\n \n . Atresia of the distal external acoustic meatus in a Bouvier des Flandres. J Small Anim Pract2001;42(2):88\u20139."},{"issue":"4","key":"bib10","series-title":"J Small Anim Pract","first-page":"233","article-title":"External auditory canal atresia of probable congenital origin in a dog","volume":"48","author":"Schmidt","year":"2007","unstructured":"Schmidt\n K\n , PiaiaT, BertoliniG. External auditory canal atresia of probable congenital origin in a dog. J Small Anim Pract2007;48(4):233\u20136."},{"issue":"9","key":"bib11","series-title":"J Am Vet Med Assoc","first-page":"1457","article-title":"Atresia of the vertical ear canal in a dog","volume":"155","author":"Brodey","year":"1969","unstructured":"Brodey\n RS\n , HarveyCE. Atresia of the vertical ear canal in a dog. J Am Vet Med Assoc1969;155(9):1457\u20139."},{"issue":"3","key":"bib12","series-title":"Vet Radiol Ultrasound","first-page":"267","article-title":"Imaging diagnosis\u2014ear canal distension following external auditory canal atresia","volume":"49","author":"Caine","year":"2008","unstructured":"Caine\n AR\n , HerrtageME, LadlowJF. Imaging diagnosis\u2014ear canal distension following external auditory canal atresia. 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Vet Q1997;19(4):158\u201362."},{"issue":"6","key":"bib15","series-title":"J Am Vet Med Assoc","first-page":"949","article-title":"Effect of total ablation of the external acoustic meatus and bulla osteotomy on auditory function in dogs","volume":"202","author":"Krahwinkel","year":"1993","unstructured":"Krahwinkel\n DJ\n , PardoAD, SimsMH. Effect of total ablation of the external acoustic meatus and bulla osteotomy on auditory function in dogs. J Am Vet Med Assoc1993;202(6):949\u201352."},{"issue":"2","key":"bib16","series-title":"Vet Radiol Ultrasound","first-page":"137","article-title":"Review of diagnostic imaging of ear diseases in the dog and cat","volume":"44","author":"Garosi","year":"2003","unstructured":"Garosi\n LS\n , DennisR, SchwarzT. Review of diagnostic imaging of ear diseases in the dog and cat. 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Atresia of the external acoustic meatus in a dog. Aust Vet J1997;75(1):18\u201320."},{"key":"bib7","series-title":"Wien Tierarztl Mschr","first-page":"276","article-title":"Unilateral congenital malformation of the meatus acusticus externus in a dog (Einseitige Missbildung des Meatus acusticus externus bei einem Hund)","volume":"85","author":"Lorinson","year":"1998","unstructured":"Lorinson\n D\n , NellB. Unilateral congenital malformation of the meatus acusticus externus in a dog (Einseitige Missbildung des Meatus acusticus externus bei einem Hund). Wien Tierarztl Mschr1998;85:276\u20138."},{"key":"bib8","series-title":"Canine Pract","first-page":"9","article-title":"Bilateral vertical ear canal resection to correct atresia of the external acoustic meatus in a dog","volume":"17","author":"Harari","year":"1992","unstructured":"Harari\n J\n , MooreM, DupuisJ. Bilateral vertical ear canal resection to correct atresia of the external acoustic meatus in a dog. Canine Pract1992;17:9\u201312."},{"issue":"2","key":"bib9","series-title":"J Small Anim Pract","first-page":"88","article-title":"Atresia of the distal external acoustic meatus in a Bouvier des Flandres","volume":"42","author":"House","year":"2001","unstructured":"House\n A\n \n . Atresia of the distal external acoustic meatus in a Bouvier des Flandres. J Small Anim Pract2001;42(2):88\u20139."},{"issue":"4","key":"bib10","series-title":"J Small Anim Pract","first-page":"233","article-title":"External auditory canal atresia of probable congenital origin in a dog","volume":"48","author":"Schmidt","year":"2007","unstructured":"Schmidt\n K\n , PiaiaT, BertoliniG. External auditory canal atresia of probable congenital origin in a dog. J Small Anim Pract2007;48(4):233\u20136."},{"issue":"9","key":"bib11","series-title":"J Am Vet Med Assoc","first-page":"1457","article-title":"Atresia of the vertical ear canal in a dog","volume":"155","author":"Brodey","year":"1969","unstructured":"Brodey\n RS\n , HarveyCE. Atresia of the vertical ear canal in a dog. J Am Vet Med Assoc1969;155(9):1457\u20139."},{"issue":"3","key":"bib12","series-title":"Vet Radiol Ultrasound","first-page":"267","article-title":"Imaging diagnosis\u2014ear canal distension following external auditory canal atresia","volume":"49","author":"Caine","year":"2008","unstructured":"Caine\n AR\n , HerrtageME, LadlowJF. Imaging diagnosis\u2014ear canal distension following external auditory canal atresia. Vet Radiol Ultrasound2008;49(3):267\u20139."},{"issue":"10","key":"bib13","series-title":"J Feline Med Surg","first-page":"864","article-title":"Primary anastomosis of segmental external auditory canal atresia in a cat","volume":"11","author":"Coomer","year":"2009","unstructured":"Coomer\n AR\n , BaconN. Primary anastomosis of segmental external auditory canal atresia in a cat. J Feline Med Surg2009;11(10):864\u20138."},{"issue":"4","key":"bib14","series-title":"Vet Q","first-page":"158","article-title":"Comparison of air- and bone-conducted brain stem auditory evoked responses in young dogs and dogs with bilateral ear canal obstruction","volume":"19","author":"Wolschrijn","year":"1997","unstructured":"Wolschrijn\n CF\n , Venker-van HaagenAJ, van den BromWE. Comparison of air- and bone-conducted brain stem auditory evoked responses in young dogs and dogs with bilateral ear canal obstruction. 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