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Management of stapes footplate fistula in inner ear malformations
Levent Sennaroglu1, Munir Demir Bajin1
1Department of Otolaryngology, Hacettepe University Medical Faculty, Turkey.
Background:
Certain inner ear malformations have stapes footplate fistula which may cause meningitis during otitis media. This may result in fatality. It is the responsibility of the otolaryngologist to diagnose and treat the condition to prevent further attacks of meningitis.
Materials And Methods:
Surgical findings of the 17 patients who have inner ear malformations with oval window fistula were retrospectively analyzed. Inner ear malformations were classified according to Sennaroglu classification. Different stages of stapes footplate fistula are classified.
Findings:
Seventeen patients had spontaneous stapes footplate fistula at the oval window. No patient had spontaneous leakage at the round window site. Proper sealing of the leakage area with fascia in a dumbbell fashion is mandatory. Keeping the stapes in place and lumbar drainage are the two most important factors in the successful management of fistula. Particularly important is the simultaneous fistula repair and cochlear implantation where combined postauricular-transcanal approach provides the best method. Vaccination is important but not sufficient to prevent meningitis in inner ear malformations unless repair of the fistula is performed.
Conclusion:
If the patient has a history of meningitis in the presence of inner ear malformation, particular attention should be given to oval window area to look for an opacity, cyst or a leaking lesion at the stapes footplate. Immediate surgical exploration and repair of the leak is mandatory to prevent further attacks of meningitis. Surgeon should not leave the operation without fully controlling the leak.
Insights
Inner ear malformations with stapes footplate fistula can cause fatal meningitis. Prompt surgical repair of oval window fistulas is crucial to prevent recurrent meningitis attacks in affected patients.
Area of Science:
- Otolaryngology
- Neurosurgery
- Pediatric Surgery
Background:
- Inner ear malformations can present with stapes footplate fistulas, increasing the risk of meningitis during otitis media.
- Meningitis secondary to otitis media in patients with inner ear malformations can be fatal.
- Otolaryngologists play a critical role in diagnosing and managing these conditions to prevent meningitis.
Purpose of the Study:
- To analyze surgical findings in patients with inner ear malformations and oval window fistulas.
- To classify inner ear malformations and stapes footplate fistulas.
- To identify key factors for successful surgical management and prevention of meningitis.
Main Methods:
- Retrospective analysis of surgical findings in 17 patients with inner ear malformations and oval window fistulas.
- Classification of inner ear malformations using the Sennaroglu classification.
- Classification of stapes footplate fistula stages.
Main Results:
- Spontaneous stapes footplate fistulas were observed at the oval window in all 17 patients; none occurred at the round window.
- Successful management requires proper sealing of the fistula with fascia and maintaining stapes position.
- Simultaneous fistula repair and cochlear implantation, using a combined postauricular-transcanal approach, is highlighted as an effective method.
Conclusions:
- Patients with inner ear malformations and a history of meningitis require careful examination of the oval window for leaks.
- Immediate surgical exploration and repair of stapes footplate fistulas are mandatory to prevent recurrent meningitis.
- Complete control of the fistula during surgery is essential for successful outcomes.
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