학술논문
Tympanic membrane perforations cannot be reliably detected using computed tomography based on 15 cadaver dogs.
Document Type
Academic Journal
Author
Stokowski S; Department of Small Animal Clinical Sciences, University of Tennessee, Knoxville, Tennessee, USA.; Hespel AM; Department of Small Animal Clinical Sciences, University of Tennessee, Knoxville, Tennessee, USA.; Drake E; Department of Small Animal Clinical Sciences, University of Tennessee, Knoxville, Tennessee, USA.; de Swarte M; VetCT, Orlando, Florida, USA.; Cole R; Department of Clinical Sciences, Auburn University, Auburn, Alabama, USA.; Johnson K; Department of Radiology, MedVet Animal Hospital, Cincinnati, Ohio, USA.; Morandi F; Department of Small Animal Clinical Sciences, University of Tennessee, Knoxville, Tennessee, USA.; Zhu X; Office of Information Technology, University of Tennessee, Knoxville, Tennessee, USA.
Source
Publisher: Blackwell Country of Publication: England NLM ID: 9209635 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1740-8261 (Electronic) Linking ISSN: 10588183 NLM ISO Abbreviation: Vet Radiol Ultrasound Subsets: MEDLINE
Subject
Language
English
Abstract
The integrity of the tympanic membrane is an important factor when deciding treatment and therapeutic recommendations for dogs with ear disease; however, otoscopic examination may be difficult to perform due to features of external ear canal disease or patient compliance. CT is useful for the evaluation of middle ear disease, including cases in which middle ear disease is detected incidentally. The tympanic membrane is detectable using CT, but anecdotally, apparent focal defects or discontinuities of the tympanic membrane are often seen in patients with and without ear disease. The purpose of this prospective, observer agreement study was to determine if perforations of the tympanic membrane are reliably detectable on CT. Fifteen cadaver dogs underwent CT and video otoscopy to verify the integrity of each tympanic membrane. Cadavers were randomly assigned to have the tympanic membranes left intact or to undergo a myringotomy on either the left, the right, or both sides. CT was performed immediately following the myringotomies. Four blinded evaluators evaluated the pre- and post-myringotomy scans for a total of 30 scans (60 tympanic membranes). Average accuracy was low (44%), and interobserver agreement for all four evaluators was fair. Although the tympanic membrane is visible on CT, perforations of the tympanic membrane are unlikely to be accurately detected or excluded. The appearance of an intact tympanic membrane or defect in the membrane on CT should not be used as criteria to guide clinical treatment recommendations based on this cadaver model.
(© 2024 American College of Veterinary Radiology.)
(© 2024 American College of Veterinary Radiology.)