Davidson E B, Brodie H A, Breznock E M
Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California, Davis 95616, USA.
J Am Vet Med Assoc. 1997 Dec 15;211(12):1549-53.
A new surgical method for treating cholesteatoma in dogs is described. Although rarely reported in dogs, cholesteatomas may be more common than previously believed. Complete excision of a cholesteatoma is associated with low recurrence and good long-term prognosis. Surgical intervention, with total ear canal ablation and lateral bulla osteotomy, has been recommended in dogs with tumors of the middle ear; however, this technique often results in conductive hearing loss. Through a caudal auricular approach to the tympanic bulla, we were able to preserve the external ear canal, reconstruct the auditory ossicles, and graft the tympanic membrane. Results of brain stem auditory-evoked response tests in the dog revealed intact conduction potentials. A caudal auricular approach to the tympanic bulla is technically possible, preserves normal appearance, and may maintain, or even improve, hearing conduction of affected ears in dogs.
本文描述了一种治疗犬胆脂瘤的新手术方法。虽然犬胆脂瘤鲜有报道，但可能比之前认为的更为常见。胆脂瘤的完整切除与低复发率及良好的长期预后相关。对于中耳肿瘤的犬，推荐采用全耳道切除及外侧鼓泡骨切开术进行手术干预；然而，该技术常导致传导性听力损失。通过经耳后尾侧入路至鼓泡，我们能够保留外耳道、重建听小骨并移植鼓膜。犬的脑干听觉诱发电位测试结果显示传导电位完整。经耳后尾侧入路至鼓泡在技术上可行，能保持正常外观，且可能维持甚至改善患犬患耳的听力传导。
