Evaluation of Cervical Vestibular Evoked Myogenic Potentials in Conductive and Mixed Hearing Losses
cVEMP in air-bone gaps
Keywords:Cervical vestibular evoked myogenic potentials, conductive hearing loss, mixed hearing loss, air-bone gap, otosclerosis, semicircular canal dehiscence
Objective: To evaluate the role of Cervical Vestibular Evoked Myogenic Potentials (cVEMP) test in the differential diagnosis of middle and inner ear pathologies by analyzing the test results in conductive and mixed hearing loss in patients with intact tympanic membrane.
Material and Methods: The study included 50 patients (64 ears) with intact tympanic membranes and air-bone gap in pure tone audiometry test, who applied to İzmir Katip Çelebi University Atatürk Training and Research Hospital Ear, Nose and Throat Diseases polyclinic between January 2019 and September 2022. The cVEMP test results of these patients were evaluated and analyzed.
Results: The age range of the patients was 18-75, the mean age was 47.55±13.59, half of them were male and half were female. While the most common middle ear pathology was otosclerosis, inner ear pathology was superior semicircular canal dehiscence. In the other patients, pathologies such as tympanosclerosis, chronic mastoiditis, serous otitis media, ossicular chain pathology, otic capsule dehiscence, and middle ear mass were found. While no cVEMP response was obtained in 41 (82%) of the patients, cVEMP response was obtained in 9 (18%) patients.
Conclusion: The response to cVEMP test before surgery and the threshold and amplitude values determined in the test can help differential diagnosis and prevent unnecessary surgery in conductive and mixed hearing loss in patients with intact tympanic membrane.
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