Science and Innovations in MedicineScience and Innovations in Medicine2500-13882618-754XFSBEI of Higher Education SamSMU of Ministry of Health of the Russian Federation2146310.35693/2500-1388-2018-0-1-55-58Research ArticleDIAGNOSTICS OF NON-INFLAMMATORY PERILYMPHATIC FISTULAS OF LABYRINTHINE WINDOWSKozarenkoM Ajunior research associate of the Department of Voice and Speech Pathophysiology of Saint Petersburg Research Institute of Ear, Throat, Nose and Speech.m.a.kozarenko@mail.ruSaint-Petersburg Research Institute of Ear, Throat, Nose and Speech1503201831555810032020Copyright © 2018, Kozarenko M.A.2018Aim -1. To remind of the difficulty of diagnosis of noninflammatory perilymphatic fistulas of labyrinthine windows and to allocate the most significant audiometric tests for the differential diagnosis of perilymphatic fistulas of labyrinthine windows (PFOLW). 2. To emphasize the absence of accurate data on the prevalence of this pathology up to date. Materials and methods. The methods of audiological testing used in 32 intraoperatively verified cases of PFOLW are listed and discussed. Clinical examples from own practice are given. Results. After analyzing the informativeness of the audio tests, the routing of the audiological examination of patients with PFOLW was determined. inclusion 1. The sequence of the tests used in the examination of patients suspected of PFOLW, the identification of which is difficult due to the absence of characteristic symptoms (including audiometric ones), is justified. 2. The expediency of a broader use of surgical treatment in cases of deafness of unknown origin is confirmed.clinical picture of perilymphatic fistulas of labyrinthine windowsaudiological testingperilymphorrhoeaклиническая картина перилимфатических фистул окон лабиринтааудиологическое тестированиеперилимфорея[Bhatia Nitin, Lehrer Joel F. 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