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Residual vestibular function after vestibular schwannoma surgery
R. Černý, Z. Balatková, S. Hrubá, M. Danková, P. Volf, P. Kutílek, J. Plzák, V. Bandúrová, V. Koucký, E. Mrázková, Z. Čada,
Jazyk angličtina Země Francie
Typ dokumentu časopisecké články
- MeSH
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- nervová vlákna MeSH
- neurochirurgické výkony metody MeSH
- pooperační komplikace patofyziologie MeSH
- pooperační období MeSH
- prognóza MeSH
- pulsní rotační test MeSH
- senioři MeSH
- vestibulární aparát patofyziologie MeSH
- vestibulární funkční testy MeSH
- vestibulární schwannom patofyziologie chirurgie MeSH
- vestibulookulární reflex MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
OBJECTIVES: This study aimed to assess vestibular function in 39 patients who underwent neurectomy for vestibular schwannoma. METHOD: Semicircular canal reactivity was measured by video head-impulse test using high-frequency passive head acceleration. Response gain was calculated as a ratio between the areas under the eye-velocity curve and the head-velocity curve. STATISTICAL ANALYSIS: Student t-test was used for to compare quantitative variables. ANOVA was used to test inter-group differences in categoric variables. RESULTS: In all cases, surgery-side gain on head impulse test was low, with increased gain asymmetry. A subgroup of 7 patients (18%) showed relatively high gain in vestibulo-ocular reflex on the surgery side. Caloric reaction was absent in all cases. These findings indicate that residual vestibular function can be conserved following vestibular schwannoma extirpation. CONCLUSION: Cases with moderate vestibulo-ocular reflex gain were a subgroup with partial conservation of vestibular nerve fibers. Whether this is a predictor of better functional prognosis remains to be elucidated. Higher gain correlated with less extensive surgery and sparing of the inferior vestibular nerve. Low gain correlated with complete vestibular neurectomy. This information may guide rehabilitation strategy following surgery.
Citace poskytuje Crossref.org
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- $a Černý, R $u Department of Neurology, 2(nd) Faculty of Medicine, Charles University in Prague and Motol University Hospital, V Úvalu 84, Prague 150 06, Czech Republic. Electronic address: rudolf.cerny@lfmotol.cuni.cz.
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- $a OBJECTIVES: This study aimed to assess vestibular function in 39 patients who underwent neurectomy for vestibular schwannoma. METHOD: Semicircular canal reactivity was measured by video head-impulse test using high-frequency passive head acceleration. Response gain was calculated as a ratio between the areas under the eye-velocity curve and the head-velocity curve. STATISTICAL ANALYSIS: Student t-test was used for to compare quantitative variables. ANOVA was used to test inter-group differences in categoric variables. RESULTS: In all cases, surgery-side gain on head impulse test was low, with increased gain asymmetry. A subgroup of 7 patients (18%) showed relatively high gain in vestibulo-ocular reflex on the surgery side. Caloric reaction was absent in all cases. These findings indicate that residual vestibular function can be conserved following vestibular schwannoma extirpation. CONCLUSION: Cases with moderate vestibulo-ocular reflex gain were a subgroup with partial conservation of vestibular nerve fibers. Whether this is a predictor of better functional prognosis remains to be elucidated. Higher gain correlated with less extensive surgery and sparing of the inferior vestibular nerve. Low gain correlated with complete vestibular neurectomy. This information may guide rehabilitation strategy following surgery.
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