Surgical exposure of the internal auditory canal through the retrosigmoid approach with semicircular canals anatomical preservation.
Arq Neuropsiquiatr
; 73(5): 425-30, 2015 May.
Article
em En
| MEDLINE
| ID: mdl-26017209
OBJECTIVE: Evaluate the feasibility of an adequate exposure with anatomical preservation of labyrinth structures through retrosigmoid transmeatal approach (RSA) in surgeries for resection of acoustic neuromas/vestibular schwannomas (VS). METHOD: Thirty patients underwent surgical resection and were preoperatively evaluated with fine slice high definition CT scans and 3D-MRI volumetric reconstructions. Extension of internal auditory canal (IAC) opening during surgery was measured using 3 mm right-angle calibrated hook and neuronavigation parameters. Postoperatively, the extension of IAC opening and integrity of the labyrinth were confirmed through preoperatively images procedures. RESULTS: The preoperative length of IACs varied between 7.8 and 12.0 mm (mean 9.3 mm, SD 0.98, 95%CI 8.9 to 9.6, and median 9.0 mm). Postoperative images demonstrated adequate opening of the IAC and semicircular channels integrity. CONCLUSION: A complete drilling of the posterior wall of IAC through the RSA is feasible and allows direct visualization of the IAC-fundus without damaging the semicircular canals.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Canais Semicirculares
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Neuroma Acústico
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Tratamentos com Preservação do Órgão
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Orelha Interna
Tipo de estudo:
Evaluation_studies
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Observational_studies
Limite:
Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Arq Neuropsiquiatr
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Alemanha