1. Cochlear patency following translabyrinthine vestibular schwannoma resection: implications for hearing rehabilitation.
- Author
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Carswell, V, Crowther, J A, Locke, R, Taylor, W, and Kontorinis, G
- Subjects
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DIAGNOSIS of ear diseases , *ACOUSTIC neuroma , *COCHLEAR implants , *EAR diseases , *HEARING impaired , *MAGNETIC resonance imaging , *POSTOPERATIVE care , *REHABILITATION , *SURGICAL complications , *FIBROSIS , *TREATMENT effectiveness , *RETROSPECTIVE studies , *DISEASE risk factors ,ACOUSTIC nerve diseases - Abstract
Objective: To examine when cochlear fibrosis occurs following a translabyrinthine approach for vestibular schwannoma resection, and to determine the safest time window for potential cochlear implantation in cases with a preserved cochlear nerve. Methods: This study retrospectively reviewed the post-operative magnetic resonance imaging scans of patients undergoing a translabyrinthine approach for vestibular schwannoma resection, assessing the fluid signal within the cochlea. Cochleae were graded based on the Isaacson et al. system (from grade 0 – no obstruction, to grade 4 – complete obliteration). Results: Thirty-nine patients fulfilled the inclusion criteria. The cochleae showed no evidence of obliteration in: 75 per cent of patients at six months, 38.5 per cent at one year and 27 per cent beyond one year. Most changes happened between 6 and 12 months after vestibular schwannoma resection, with cases of an unobstructed cochlear decreasing dramatically, from 75 per cent to 38.5 per cent, within this time. Conclusion: The progress of cochlear obliteration that occurred between 6 and 12 months following vestibular schwannoma resection indicates that the first 6 months provides a safer time window for cochlear patency. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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