Evaluation of Vertical Semicircular Canal Function in Patients With Vestibular Schwannoma

Fujiwara, Kazutoshi; Yanagi, Hiroko; Morita, Shinya; Hoshino, Kimiko; Fukuda, Atsushi; Nakamaru, Yuji; Homma, Akihiro

doi:10.1177/0003489418808545

Cited by 15 publications

(8 citation statements)

References 18 publications

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“…The anterior semicircular canal is the least affected in our study; this is in line with the robustness of this canal observed in vestibular pathology. Fujiwara observed a greater preservation of responses of the anterior semicircular canal in a cohort of patients with vestibular schwannoma (Fujiwara et al 2019). During embryogenesis, the anterior canal is the first of the semicircular canals to develop, well before the cochlea: this may explain its greater resistance (Catala 2018).…”

Section: Differential Consequences In the Vestibular Part Of The Inne...mentioning

confidence: 99%

Audiovestibular Consequences of Congenital Cytomegalovirus Infection: Greater Vulnerability of the Vestibular Part of the Inner Ear

et al. 2022

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Objectives: To investigate the impact of congenital cytomegalovirus infection on cochlear and vestibular function.Design: This retrospective study conducted between March 2014 and March 2020 included children with confirmed congenital cytomegalovirus infection who underwent a complete audio-vestibular evaluation. It included a bithermal caloric test, a video head impulse test and a cervical vestibular evoked myogenic potential associated with a complete hearing assessment. Results:The cohort of 130 children included in the study had a median age of 21 months (interquartile range: 12 to 37 months). Eighty-three children (64%) showed an inner ear impairment (both cochlear and vestibular). The vestibular part of the inner ear was significantly more frequently impaired than the cochlear part (ρ = 0.003). Sixty-two children (48%) showed confirmed hearing impairment. The severity of hearing loss was variable, with a high proportion of profound hearing loss (30/62, 48%), which was often bilateral (47/62, 76%). The vestibular assessment showed a canal function disorder in 67 children (88%) and an otolith function disorder in 63 children (83%; ρ = 0.36). The video head impulse test was significantly less altered (64%) compared with the bithermal caloric test (80%; ρ = 0.02) and the cervical vestibular evoked myogenic potential (83%; ρ = 0.009). Only seven out of 83 children (8%) showed hearing loss without vestibular dysfunction, of which only one had a normal hearing screening test at birth. For the children who passed the hearing screening test at birth and presented an inner ear impairment [n = 36, median age: 16 (11 to 34) months], vestibular disorders were later found in 35 children (97%) and 17 of them (47%) developed hearing loss secondarily. This underlines the importance of assessing both vestibular and auditory parts of the inner ear. When comparing the agreement of cochlear and vestibular impairment, the severity and the laterality of the impairment were low [Cohen's kappa 0.31 (0.22 to 0.40) and 0.43 (0.32 to 0.55), respectively]. Conclusion:In our study, we demonstrated that although both cochlear and vestibular parts of the inner ear can be impaired by congenital cytomegalovirus infection, the vestibular part seems more often impaired compared with the cochlear part. This underlines the importance of vestibular evaluation in the follow-up of cytomegalovirus-infected children associated with hearing assessment.

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Section: Differential Consequences In the Vestibular Part Of The Inne...mentioning

confidence: 99%

Audiovestibular Consequences of Congenital Cytomegalovirus Infection: Greater Vulnerability of the Vestibular Part of the Inner Ear

et al. 2022

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“…A normal gain was defined as ≥0.80 for the horizontal canal and ≥0.70 for the vertical canals (13). The catch-up saccade (CUS) was defined as abnormal in this study if the velocity of the CUS exceeded 90°/s based on our previous study (12). In this study, the judgement of semicircular canal dysfunction was made when a reduction in VOR gain and the presence of CUS were observed.…”

Section: Methodsmentioning

confidence: 99%

“…Our video head impulse testing (vHIT) methodology has been described previously (12). Briefly, semicircular canal function was evaluated using an ICS impulse 3-D video head impulse system (GN Otometrics, Taastrup, Denmark).…”

Section: Video Head Impulse Testingmentioning

confidence: 99%

Evaluation of Semicircular Canal Function by Video Head Impulse Test in Patients With Labyrinthine Fistula Due to Cholesteatoma

Fujiwara

Morita

Fukuda

et al. 2022

Otology &Amp; Neurotology

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Objectives: To evaluate semicircular canal function in patients with labyrinthine fistula (LF) due to cholesteatoma by the video Head Impulse Test (vHIT). Study Design: Retrospective case review. Setting: Tertiary referral center. Patients: Ten patients with LF due to cholesteatoma and six without LF underwent vestibular examination. Intervention: Diagnostic. Main Outcome Measures: The gain in vestibulo-ocular reflex (VOR) and the presence of catch-up saccade were examined for the semicircular canals in patients with LF. Results: Seven of 10 cases (70.0%) in the fistula group were judged to have semicircular canal dysfunction based on preoperative evaluation. VOR gains in the patients with LF were significantly lower than those in the patients without LF. VOR gain decreased significantly in accordance with the severity of the LF. The postoperative VOR gain more than 6 months after surgery was significantly improved compared with the preoperative VOR gain. Conclusions: The vHIT is thought to be the most suitable method for evaluating semicircular canal function in patients with LF due to cholesteatoma as it is not influenced by middle ear pathology and can evaluate the function of the vertical canals. The vHIT could predict whether a LF is present or not before surgery, and the vHIT is essential for surgery for patients with LF.

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“…Fujiwara et al 11 studied the function of the vertical canal in patients with vestibular schwannoma, and found that dysfunction in the anterior and posterior semicircular canals was detected by the vHIT in 26.7% and 60.0% of the patients respectively. Fukushima et al 12 described vertical canal dysfunction in a patient with early-stage Menière disease.…”

Section: Right Anteriormentioning

confidence: 99%

Vestibular Disorders Limited to the Vertical Semicircular Canals

Albernaz,

Cusin,

Ramos

et al. 2024

Int Arch Otorhinolaryngol

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Introduction The advent of the video head impulse test (vHIT) enables the study of each one of the six semicircular canals. In the present study, certain patients present disorders related only to the vertical semicircular canals, and they were carefully evaluated. Objective To investigate vestibular disorders limited to the vertical semicircular canals. Methods In total, 9,891 patients were submitted to the vHIT in our clinic; 26 (2.63%) of them, 11 men and 15 women, showed reduced vestibulo-ocular reflex (VOR) limited to the vertical canals. All of these patients had vestibular symptoms. Results These patients presented different disorders of the vestibular system, and ten of them presented vestibular neuritis. Conclusions Now, vestibular disorders limited the vertical canals can be evaluated through the vHIT. These disorders, however, may relate do different labyrinthine diseases.

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Evaluation of Vertical Semicircular Canal Function in Patients With Vestibular Schwannoma

Cited by 15 publications

References 18 publications

Audiovestibular Consequences of Congenital Cytomegalovirus Infection: Greater Vulnerability of the Vestibular Part of the Inner Ear

Audiovestibular Consequences of Congenital Cytomegalovirus Infection: Greater Vulnerability of the Vestibular Part of the Inner Ear

Evaluation of Semicircular Canal Function by Video Head Impulse Test in Patients With Labyrinthine Fistula Due to Cholesteatoma

Vestibular Disorders Limited to the Vertical Semicircular Canals

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