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Mobile phone app Vs bucket test as a subjective visual vertical test: a validation study

BACKGROUND: The SVV tests the ability of a person to perceive the gravitational vertical. A tilt in SVV indicates vestibular imbalance in the roll plane, and thus injuries to the utricle or its connecting nerves. A validated bedside method (et, al., 2009, 72(19):1689–1692, Neurol, Zwergal) is the bu...

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Autores principales: Dai, Tianyang, Kurien, George, Lin, Vincent YW
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7001292/
https://www.ncbi.nlm.nih.gov/pubmed/32020884
http://dx.doi.org/10.1186/s40463-020-0402-3
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author Dai, Tianyang
Kurien, George
Lin, Vincent YW
author_facet Dai, Tianyang
Kurien, George
Lin, Vincent YW
author_sort Dai, Tianyang
collection PubMed
description BACKGROUND: The SVV tests the ability of a person to perceive the gravitational vertical. A tilt in SVV indicates vestibular imbalance in the roll plane, and thus injuries to the utricle or its connecting nerves. A validated bedside method (et, al., 2009, 72(19):1689–1692, Neurol, Zwergal) is the bucket method, in which the subject estimates the true vertical by attempting to properly align a straight line visible on the bottom of a bucket that is rotated at random by the examiner. In our study, the subjects need to align the plumb line on the Visual Vertical iOS app to the vertical direction. METHODS: Measurements of the SVV were made in 22 healthy subjects (16 females and 6 males). Each subject conducted 10 iterations of bucket test and 10 iterations of iOS app test. The reliability and validity of the iOS app was analyzed by SPSS21. RESULTS: Cronbach’s α for the plumb line method was 0.976, and the iOS app was 0.978. Statistical comparison of SVV values measured by the iOS app and the bucket method showed no significant difference in distribution (Mann Whitney U test U = 0.944). CONCLUSION: The Visual Vertical iOS app is an effective and accessible substitute to the plumb line for the measurement of the validated bucket test.
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spelling pubmed-70012922020-02-10 Mobile phone app Vs bucket test as a subjective visual vertical test: a validation study Dai, Tianyang Kurien, George Lin, Vincent YW J Otolaryngol Head Neck Surg Original Research Article BACKGROUND: The SVV tests the ability of a person to perceive the gravitational vertical. A tilt in SVV indicates vestibular imbalance in the roll plane, and thus injuries to the utricle or its connecting nerves. A validated bedside method (et, al., 2009, 72(19):1689–1692, Neurol, Zwergal) is the bucket method, in which the subject estimates the true vertical by attempting to properly align a straight line visible on the bottom of a bucket that is rotated at random by the examiner. In our study, the subjects need to align the plumb line on the Visual Vertical iOS app to the vertical direction. METHODS: Measurements of the SVV were made in 22 healthy subjects (16 females and 6 males). Each subject conducted 10 iterations of bucket test and 10 iterations of iOS app test. The reliability and validity of the iOS app was analyzed by SPSS21. RESULTS: Cronbach’s α for the plumb line method was 0.976, and the iOS app was 0.978. Statistical comparison of SVV values measured by the iOS app and the bucket method showed no significant difference in distribution (Mann Whitney U test U = 0.944). CONCLUSION: The Visual Vertical iOS app is an effective and accessible substitute to the plumb line for the measurement of the validated bucket test. BioMed Central 2020-02-05 /pmc/articles/PMC7001292/ /pubmed/32020884 http://dx.doi.org/10.1186/s40463-020-0402-3 Text en © The Author(s). 2020 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Original Research Article
Dai, Tianyang
Kurien, George
Lin, Vincent YW
Mobile phone app Vs bucket test as a subjective visual vertical test: a validation study
title Mobile phone app Vs bucket test as a subjective visual vertical test: a validation study
title_full Mobile phone app Vs bucket test as a subjective visual vertical test: a validation study
title_fullStr Mobile phone app Vs bucket test as a subjective visual vertical test: a validation study
title_full_unstemmed Mobile phone app Vs bucket test as a subjective visual vertical test: a validation study
title_short Mobile phone app Vs bucket test as a subjective visual vertical test: a validation study
title_sort mobile phone app vs bucket test as a subjective visual vertical test: a validation study
topic Original Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7001292/
https://www.ncbi.nlm.nih.gov/pubmed/32020884
http://dx.doi.org/10.1186/s40463-020-0402-3
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