نتایج جستجو برای: round window niche
تعداد نتایج: 122463 فیلتر نتایج به سال:
OBJECTIVE To improve the efficacy of intratympanic therapy using perilymphatic entry through the round window membrane. MATERIAL AND METHODS The perilymphatic entry characteristics of 2 neutral molecules, mannitol (182.2 Da) and inulin (7,000 Da), were studied. A polyethylene catheter was placed in contact with the guinea pig round window membrane and sealed with cyanoacrylate glue. This cath...
Since the 1980's, various types of implantable hearing aids using unique means for delivering acoustic power to the inner ear have been developed. Recently, implantable hearing aids that stimulate the round window by the middle ear transducer have received great attention because it reduces loading effect at the ossicular chain. In this study, we have implemented a direct install 3-pole type EM...
Both the increasing usage of intratympanic medication to the inner ear through the round window and the popularity of cochlear implantation have raised interest in the anatomy of the round-window niche (RWN). The objectives of this study were to measure the RWN and to standardize a computed tomographic projection for measuring it. We included patients of all ages who underwent computed tomograp...
This study was designed to verify an eventual perilymphatic fistula (PLF) in 264 patients with sensorineural hearing loss (SNHL) and/or vertigo. The patients were exposed to a low-frequency sound stimulation (LFS) on posturography to objectively test Tullio's phenomenon and Hennebert's sign. Endoscopes with 5 degree and 25 degree of visual angle and an outer diameter of 1.7 mm were used. The ro...
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