Theoretical observation on diagnosis maneuver for benign paroxysmal positional vertigo

Yang, Xiaokai; Zheng, Yufeng; Yang, Xiao-Guo

doi:10.1080/00016489.2016.1271451

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…Accurate structural information about the semicircular canals can aid the clinical diagnosis and treatment. Excluding patients with an inner ear deformity or superior semicircular canal dehiscence, we can use the orientations of semicircular canals to improve or develop a new BPPV treatment to reposition the otolith ( 31 , 32 ). Approximately 10–20% of patients with suspected BPPV cannot be accurately diagnosed or effectively treated using routine procedures, such as the Dix–Hallpike, Epley, or Semont maneuvers ( 9 , 10 ), which may be due to individual differences in the orientations of the semicircular canals and the speed of operation ( 11 , 12 , 33 ).…”

Section: Discussionmentioning

confidence: 99%

A New Coordinate System for Magnetic Resonance Imaging of the Vestibular System

et al. 2022

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Objectives: To develop and evaluate a new coordinate system for MRI of the vestibular system.Methods: In this study, 53 internal auditory canal MRI and 78 temporal bone CT datasets were analyzed. Mimics Medical software version 21.0 was used to visualize and three-dimensionally reconstruct the image data. We established a new coordinate system, named W–X, based on the center of the bilateral eyeballs and vertex of the bilateral superior semicircular canals. Using the W–X coordinate system and Reid's coordinate system, we measured the orientations of the planes of the anterior semicircular canal (ASCC), the lateral semicircular canal (LSCC), and the posterior semicircular canal (PSCC).Results: No significant differences between the angles measured using CT and MRI were found for any of the semicircular canal planes (p > 0.05). No statistical differences were found between the angles measured using Reid's coordinate system (CT) and the W–X coordinate system (MRI). The mean values of ∠ASCC & LSCC, ∠ASCC & PSCC, and ∠LSCC & PSCC were 84.67 ± 5.76, 94.21 ± 3.81, and 91.79 ± 5.22 degrees, respectively. The angle between the LSCC plane and the horizontal imaging plane was 15.64 ± 3.92 degrees, and the angle between the PSCC plane and the sagittal imaging plane was 48.79 ± 4.46 degrees.Conclusion: A new W–X coordinate system was developed for MRI studies of the vestibular system and can be used to measure the orientations of the semicircular canals.

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Section: Discussionmentioning

confidence: 99%

A New Coordinate System for Magnetic Resonance Imaging of the Vestibular System

et al. 2022

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“…The left bone labyrinthine model obtained by micro-CT data segmentation is calibrated with the final standard inner ear model established before, and then the membrane labyrinthine model is transformed in three dimensions to establish the spatial direction of the membrane labyrinthine model [8].…”

Section: Modeling the Statistical Shape Of The Inner Earmentioning

confidence: 99%

Analysis of Dix-Hallpike maneuver induced nystagmus based on virtual simulation

Zheng

Yang

2021

Acta Oto-Laryngologica

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Background: How to interpret the various forms of nystagmus induced by the Dix-Hallpike maneuver has been the hotspot and difficulty of research. Objectives: Analysis of the types of nystagmus induced by Dix-Hallpike maneuver, and establish a diagnosis strategy based on dynamic nystagmus observation. Materials and methods: We observed the otolithic movements at different locations during the Dix-Hallpike maneuver through physical virtual simulation experiments and inferred the nystagmus performance, so as to establish the nystagmus interpretation rules for the repeated Dix-Hallpike maneuver. Results: There are six types of nystagmus induced by the Dix-Hallpike maneuver. Nystagmus induced by the unilateral Dix-Hallpike maneuver does not accurately locate the otolith. The typical nystagmus that is consistent before and after the repetition of the Dix-Hallpike maneuver is the outward and upbeat nystagmus, considering the ipsilateral posterior semicircular canal BPPV. Conclusion: The atypical nystagmus often turns negative when the Dix-Hallpike maneuver is repeated. If the repeat test is positive and consistent with the results of the first diagnostic test, the otolith can be accurately located.

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“…The spatial orientation of the three semicircular canals (SCs) has been a matter of interest since early anatomical studies of the inner ear and temporal bone. Recent clinical studies show that SCC spatial orientation plays a main role in specific pathologies (i.e., positional vertigoes [1]). In addition, the specific morphology of the vestibular system can explain the variability on the induced adverse symptoms (i.e., vertigoes and dizziness) on patients that are subjected to MRI high magnetic fields [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Systematic Method for Morphological Reconstruction of the Semicircular Canals Using a Fully Automatic Skeletonization Process

et al. 2019

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We present a novel method to characterize the morphology of semicircular canals of the inner ear. Previous experimental works have a common nexus, the human-operator subjectivity. Although these methods are mostly automatic, they rely on a human decision to determine some particular anatomical positions. We implement a systematic analysis where there is no human subjectivity. Our approach is based on a specific magnetic resonance study done in a group of 20 volunteers. From the raw data, the proposed method defines the centerline of all three semicircular canals through a skeletonization process and computes the angle of the functional pair and other geometrical parameters. This approach allows us to assess the inter-operator effect on other methods. From our results, we conclude that, although an average geometry can be defined, the inner ear anatomy cannot be reduced to a single geometry as seen in previous experimental works. We observed a relevant variability of the geometrical parameters in our cohort of volunteers that hinders this usual simplification.

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Theoretical observation on diagnosis maneuver for benign paroxysmal positional vertigo

Cited by 5 publications

References 12 publications

A New Coordinate System for Magnetic Resonance Imaging of the Vestibular System

A New Coordinate System for Magnetic Resonance Imaging of the Vestibular System

Analysis of Dix-Hallpike maneuver induced nystagmus based on virtual simulation

Systematic Method for Morphological Reconstruction of the Semicircular Canals Using a Fully Automatic Skeletonization Process

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