Süperior Semisirküler Kanal Dehissansı Olgularında oVEMP ve cVEMP Değerlendirmesi

Year 2024, Volume: 6 Issue: 1, 206 - 214, 25.04.2024

Ceren Uğur , Yeşim Gizem Ertürk , Bahriye Horasanlı

https://doi.org/10.46413/boneyusbad.1401029

Abstract

Süperior semisirküler kanal dehissansı, süperior semisirküler kanalın üzerini örten kemik tabakanın eksikliği veya zamanla incelip erimesi sonucunda oluşan odyovestibüler sistemin bir hastalığıdır. Hastalık, kemik tabakanın olmayışı nedeniyle iç kulakta oval ve yuvarlak pencere dışında üçüncü bir pencere oluşturur. Oluşan üçüncü pencere nedeniye saf ses odyometri testi sonrası kemik yolu eşiklerini azaltan yalancı iletim tipi işitme kaybı (psödo-konduktif) gözlenir. Vestibüler uyarılmış miyojenik potansiyeller ise akustik bir uyarana, boyun veya göz kaslarının verdiği cevapların elektrotlar aracılığıyla kaydedildiği elektrofizyolojik bir ölçüm yöntemidir. Kullanım amacı, vestibuler son organlar olan urtikül ve sakkülün fonksiyonlarını değerlendirmektir. En patognomonik olduğu hastalık semisirküler kanal dehissansı olmakla birlikte birincil amacı semisirküler kanal dehissansının tanısını koydurmaktır. Bu derlemede, son on yılın araştırmaları esas alınmış olup; süpeior semisirküler kanal dehissansı (SSKD) olgularında, oküler vestibüler uyarılmış miyojenik potansiyeller (oVEMP) ve servikal vestibüler uyarılmış miyojenik potansiyeller (cVEMP) testlerinin tanısal sonuçları değerlendirilmiştir. Çalışmalar, SSKD olgularında etkilenen tarafta Cvemp testi eşiklerinde anormal düşüşleri ifade etmektedir. Ayrıca oVEMP amplitüdünde, etkilenen tarafta belirgin bir artışta bildirilmiştir. Sonuçlar; bu iki testin birlikte değerlendirmeye alınmasının, semisirküler kanal dehisansı olgularına tanısal anlamda katkı sunacağını göstermektedir.

Keywords

SSCD, cVEMP, oVEMP, Psödo-konduktif işitme kaybı

Evaluation of oVEMP and cVEMP in Superior Semicircular Canal Dehiscence Cases

Abstract

Superior semisircular canal dehiscence (SSCD) is a disease of the audiovestibular system, which occurs as a result of the lack of bone layer covering the superior semisircular canal. The disease forms a third window in the inner ear due to the lack of bone layer. The third window that occurs forms a pseudo conductive type of hearing loss, which has decreased bone thresholds in the audiometry test. Vestibular evoked myogenic potentials are an electrophysiological measurement method in which the responses of the neck or eye muscles to an acoustic stimulus are recorded by means of electrodes. The purpose of use is to evaluate the functions of the urticle and saccule, which are the vestibular end organs. Therefore its primary purpose is to diagnose semicircular canal dehiscence. This review is based on research from the last decade; diagnostic results of ocular vestibular evoked myogenic potentials (oVEMP) and cervical vestibular evoked myogenic potentials (cVEMP) tests were evaluated in cases of superior semicircular canal dehiscence (SSCD). Studies indicate abnormal decreases in cVEMP test thresholds on the affected side in SSCD cases. Additionally, a significant increase in oVEMP amplitude on the affected side has been reported. Results; It shows that evaluating these two tests together will contribute to the diagnosis of semicircular canal dehiscence cases.

Keywords

Superior semicircular canal dehiscence, Cervical vestibular evoked myogenic potentials, Ocular vestibular evoked myogenic potentials

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