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An Atypical Case of Benign Paroxysmal Positional Vertigo of the Anterior Semicircular Canal
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Minbum Kim, Hyun Su Kim, Hee Nam Kim
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Res Vestib Sci. 2011;10(3):100-102.
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 Abstract
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- Benign paroxysmal positional vertigo (BPPV) of anterior semicircular canal (ASC) is the rarest variant of BPPV, which is thought to be due to the anatomically superior position of ASC during most activities. This type of BPPV is currently diagnosed by detecting positional down-beating nystagmus in the Dix-Hallpike test. A 62-year-old female presented with positional vertigo, especially when sitting up. No nystagmus was induced by both Dix-Hallpike tests, however, positional down-beating nystagmus was observed with the left torsional component when sitting up from both Dix-Hallpike positions and supine position. After the reverse Epley maneuver, up-beating nystagmus was newly observed in the left Dix-Hallpike test, which was compatible with BPPV of the left posterior semicircular canal. This patient was thought to suffer from canalithiasis of the left ASC.
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Effect of Intratympanic Chemical Labyrinthectomy with Streptomycin on Auditory Symptoms
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Hyun Su Kim, Sung Huhn Kim, Dae Bo Shim, Sang Cheol Kim, Won Sun Yang
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Res Vestib Sci. 2009;8(1):32-36.
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Abstract
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- Background and Objectives Background and Objectives: Intratympanic treatment with aminoglycosides for Ménière’s disease has been used, trying to eliminate vertigo complaints, while preserving hearing. This study was undertaken to evaluate the therapeutic outcomes for auditory symptoms in Ménière’s disease patients after intratympanic application with single low-dose streptomycin powder.
Materials and Methods Ninty-eight patients diagnosed with definite Ménière’s disease who underwent chemical labyrinthectomy with streptomycin at Yonsei University Medical Center from March 1997 to June 2006 were enrolled. Low dose streptomycin powder (10 mg) was applied into the round window niche directly. Changes of hearing threshold, tinnitus and aural fullness were evaluated postoperatively according to Committee on Hearing and Equilibrium guidelines for the diagnosis and evaluation of therapy in Ménière’s disease of American Academy of Otolaryngology–Head and Neck Surgery.
Results Hearing threshold was not changed significantly after the procedure (from 65.5±19.1 to 69.3±20.0 p>0.05) and was improved in 7% of the patients. Hearing deterioration after the procedure was detected only in 17%. Tinnitus and aural fullness was improved in 51% and 25% respectively.
Conclusion Single application of streptomycin powder filling round window niche showed minimal deterioration of hearing threshold. It is the useful method to improve or prevent the progress of auditory symptoms in patients with Ménière’s disease.
Key Words: Streptomycin; Hearing loss; Tinnitus; Meniere Disease; Aural fullness
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