Persistence of perilymph fistula mechanism in a completely paretic posterior semicircular canal.

نویسندگان

  • C Helmchen
  • E Gehrking
  • S Gottschalk
  • H Rambold
چکیده

The three dimensional eye movements (search coil technique) of a patient with a completely paretic left posterior semicircular canal as a result of a perilymph fistula (PLF) were studied. The patient still exhibited pressure induced nystagmus that obeyed Ewald's first law. This finding cannot be explained by otolith stimulation, but might indicate that PLF mechanisms either persist in canal plugging or act on the ampulla by directly deflecting the cupula.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Use of TissuePatchDural™ in the closure of an iatrogenic fistula following posterior semicircular canal occlusion surgery for intractable benign paroxysmal positional vertigo

Benign paroxysmal positional vertigo (BPPV) is a common disorder caused by the dislocation of otoconia most commonly into the posterior canal. The primary symptoms are brief episodes of head-position related vertigo which may be accompanied by nausea and disequilibrium. BPPV is usually managed conservatively with excellent results, however in a small number of cases the symptoms can become pers...

متن کامل

A Balance Test for Chronic Perilymph Fistula

Perilymph fistula is defined as a leak of perilymph at the oval or round window. It excludes other conditions with "fistula" tests due to a dehiscent semicircular canal from cholesteotoma and the superior canal dehiscence syndrome. First recognized as a complication of stapedectomy, it then became apparent that head trauma and barotraumatic trauma from flying or diving could be a cause. Descrip...

متن کامل

The Prevalence of Labyrinthine Fistula in Chronic Otitis Media Surgery in Shiraz, Southern Iran

BACKGROUND The incidence of fistulas found during the surgery for chronic otitis media with cholesteatoma has been reported in a wide range in different geographical areas. This study aims to find the prevalence of labyrinthine fistula in the south of Iran. METHODS A prospective cross sectional study of 787 (504 ears belong to 462 patients) consecutive tympanoplasty with or without mastoidect...

متن کامل

Labyrinthine Cyst Arising in a Longstanding Cavity After a Canal Wall Down Mastoidectomy

Objective: Describe the clinical course and management of a labyrinthine cyst associated with a labyrinthine fistula arising in a longstanding cavity after a canal wall down mastoidectomy. Study Design: Case report. Setting: University Hospital, tertiary referral center. Patients, Intervention, and Results: A 71-year-old woman who underwent left radical mastoidectomy at age 7 was referred to ou...

متن کامل

Tullio phenomenon in superior semicircular canal dehiscence (SSCD).

To cite: Pullicino R, Grech R. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2015213674 DESCRIPTION A 68-year-old woman presented with worsening sound-induced vertigo (Tullio phenomenon) and left-sided hearing loss. Weber’s test lateralised to the affected ear and audiography confirmed mild conductive hearing loss. Neurological assessment was remarkable for tors...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Journal of neurology, neurosurgery, and psychiatry

دوره 76 2  شماره 

صفحات  -

تاریخ انتشار 2005