Use of Skull Vibration-Induced Nystagmus in the Follow-up of Patients With Ménière Disease Treated With Intratympanic Gentamicin

Alonso, Susana Marcos; Ayerve, Nicole Almeida; Roca, Chiara Monopoli; Touma, Guillermo Coronel; Dios, Juan Carlos del Pozo de; Gómez, Hortensia Sánchez; Ruíz, Santiago Santa Cruz; Caletrío, Ángel Batuecas

doi:10.21053/ceo.2023.00129

Cited by 2 publications

(1 citation statement)

References 39 publications

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“…However, when patients with some response during visual fixation are considered, then the mean fixation index falls to 0.4. It will be interesting to analyze whether, with time and in the case of vestibular periphery functional recovery, as occurs in some cases after intratympanic gentamicin [ 27 ], there is some modification of the fixation index.…”

Section: Discussionmentioning

confidence: 99%

Visual Fixation of Skull-Vibration-Induced Nystagmus in Patients with Peripheral Vestibulopathy

Blanco,

Monopoli-Roca,

Álvarez de Linera-Alperi

et al. 2024

Audiology Research

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Nystagmus induced by applying an intense vibratory stimulus to the skull (SVIN) indicates vestibular functional asymmetry. In unilateral vestibular loss, a 100 Hz bone-conducted vibration given to either mastoid immediately causes a primarily horizontal nystagmus. The test is performed in darkness to avoid visual fixation (VF) but there are no data about how much VF affects the often-intense SVIN. The aim is to analyze the amount of reduction in SVIN when VF is allowed during testing. Thus, all patients seen in a tertiary hospital for vertigo or dizziness with positive SVIN were included. SVIN was recorded for 10 s for each condition: without VF (aSVINwo) and with VF (aSVINw). We obtained an aSVINwo and an aSVINw as average slow-phase velocities (SPV) without and with VF. VF index (FISVIN) was calculated as the ratio of SPV. Among the 124 patients included, spontaneous nystagmus (SN) was found in 25% and the median slow phase velocity (mSPV) (without VF) of SN was 2.6 ± 2.4°/s. Mean FISVIN was 0.27 ± 0.29. FISVIN was 0 in 42 patients, and FISVIN between 0 and 1 was found in 82 (mean FISVIN 0.39 ± 0.02). Fixation suppression was found in all patients with SVIN in cases of peripheral vestibulopathy. FISVIN clearly delineates two populations of patients: with or without a complete visual reduction in nystagmus.

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Section: Discussionmentioning

confidence: 99%

Visual Fixation of Skull-Vibration-Induced Nystagmus in Patients with Peripheral Vestibulopathy

Blanco,

Monopoli-Roca,

Álvarez de Linera-Alperi

et al. 2024

Audiology Research

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Clinical Advancements in Skull Vibration-Induced Nystagmus (SVIN) over the Last Two Years: A Literature Review

Alonso,

Caletrío

2024

JCM

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Introduction and Objectives: Skull vibration-induced nystagmus (SVIN) has become a validated tool for evaluating the vestibular function. The presence of SVIN is a useful indicator of the asymmetry of vestibular function between the two ears. In unilateral vestibular loss, a 100 Hz bone-conducted vibration given to either mastoid immediately causes a primarily horizontal nystagmus. The aim of this study is to review the usefulness of this tool in different clinical situations according to the results published. Methods: We performed an electronic search using PubMed and BVS. Eleven studies were discussed. Results: A progressive linear relationship has been identified between the slow-phase velocity (SPV) of SVIN determined using a 100 Hz skull vibrator and the gain difference (healthy ear/affected ear) measured by video head impulse test (vHIT). The SPV of SVIN may be more sensitive than vHIT in identifying the recovery of vestibular function following intratympanic gentamicin (ITG) administration. A link between a reduction in SPV and the likelihood of vertigo episodes in patients with MD who have been treated with intraympanic gentamicin (ITG) has been illustrated. SVIN in superior canal dehiscence (SCD) patients has greater sensitivity than the air-conducted Tullio phenomenon (ACTP) or the Hennebert sign. SVIN can be combined with vHIT to reveal vestibular asymmetry in nonprogressive vestibular schwannomas. An upbeating SVIN may reveal superior branch vestibular neuritis. Vibration-induced downbeat nystagmus should be added to the list of central vestibular signs and is likely due to cerebellar dysfunction. Conclusions: SVIN has become an interesting screening tool for diagnosing or during the follow-up of many different vestibular pathologies.

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Use of Skull Vibration-Induced Nystagmus in the Follow-up of Patients With Ménière Disease Treated With Intratympanic Gentamicin

Abstract: Objectives: Ménière

Cited by 2 publications

References 39 publications

Visual Fixation of Skull-Vibration-Induced Nystagmus in Patients with Peripheral Vestibulopathy

Visual Fixation of Skull-Vibration-Induced Nystagmus in Patients with Peripheral Vestibulopathy

Clinical Advancements in Skull Vibration-Induced Nystagmus (SVIN) over the Last Two Years: A Literature Review

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Use of Skull Vibration-Induced Nystagmus in the Follow-up of Patients With Ménière Disease Treated With Intratympanic Gentamicin

Abstract: Objectives: M&#233;ni&#232;re

Cited by 2 publications

References 39 publications

Visual Fixation of Skull-Vibration-Induced Nystagmus in Patients with Peripheral Vestibulopathy

Visual Fixation of Skull-Vibration-Induced Nystagmus in Patients with Peripheral Vestibulopathy

Clinical Advancements in Skull Vibration-Induced Nystagmus (SVIN) over the Last Two Years: A Literature Review

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Abstract: Objectives: Ménière