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Portable Ultrasound-Based Device for Detecting Older Adults’ Sit-to-Stand Transitions in Unsupervised 30-Second Chair–Stand Tests

Lower-limb strength is a marker of functional decline in elders. This work studies the feasibility of using the quasi-periodic nature of the distance between a subjects’ back and the chair backrest during a 30-s chair–stand test (CST) to carry out unsupervised measurements based on readings from a l...

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Autores principales: Cobo, Antonio, Villalba-Mora, Elena, Hayn, Dieter, Ferre, Xavier, Pérez-Rodríguez, Rodrigo, Sánchez-Sánchez, Alberto, Bernabé-Espiga, Raquel, Sánchez-Sánchez, Juan-Luis, López-Diez-Picazo, Andrea, Moral, Cristian, Rodriguez-Mañas, Leocadio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7180983/
https://www.ncbi.nlm.nih.gov/pubmed/32244761
http://dx.doi.org/10.3390/s20071975
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author Cobo, Antonio
Villalba-Mora, Elena
Hayn, Dieter
Ferre, Xavier
Pérez-Rodríguez, Rodrigo
Sánchez-Sánchez, Alberto
Bernabé-Espiga, Raquel
Sánchez-Sánchez, Juan-Luis
López-Diez-Picazo, Andrea
Moral, Cristian
Rodriguez-Mañas, Leocadio
author_facet Cobo, Antonio
Villalba-Mora, Elena
Hayn, Dieter
Ferre, Xavier
Pérez-Rodríguez, Rodrigo
Sánchez-Sánchez, Alberto
Bernabé-Espiga, Raquel
Sánchez-Sánchez, Juan-Luis
López-Diez-Picazo, Andrea
Moral, Cristian
Rodriguez-Mañas, Leocadio
author_sort Cobo, Antonio
collection PubMed
description Lower-limb strength is a marker of functional decline in elders. This work studies the feasibility of using the quasi-periodic nature of the distance between a subjects’ back and the chair backrest during a 30-s chair–stand test (CST) to carry out unsupervised measurements based on readings from a low-cost ultrasound sensor. The device comprises an ultrasound sensor, an Arduino UNO board, and a Bluetooth module. Sit-to-stand transitions are identified by filtering the signal with a moving minimum filter and comparing the output to an adaptive threshold. An inter-rater reliability (IRR) study was carried out to validate the device ability to count the same number of valid transitions as the gold-standard manual count. A group of elders (age: mean (m) = 80.79 years old, SD = 5.38; gender: 21 female and seven male) were asked to perform a 30-s CST using the device while a trained nurse manually counted valid transitions. Ultimately, a moving minimum filter was necessary to cancel the effect of outliers, likely produced because older people tend to produce more motion artefacts and, thus, noisier signals. While the intra-class correlation coefficient (ICC) for this study was good (ICC = 0.86, 95% confidence interval (CI) = 0.73, 0.93), it is not yet clear whether the results are sufficient to support clinical decision-making.
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spelling pubmed-71809832020-04-30 Portable Ultrasound-Based Device for Detecting Older Adults’ Sit-to-Stand Transitions in Unsupervised 30-Second Chair–Stand Tests Cobo, Antonio Villalba-Mora, Elena Hayn, Dieter Ferre, Xavier Pérez-Rodríguez, Rodrigo Sánchez-Sánchez, Alberto Bernabé-Espiga, Raquel Sánchez-Sánchez, Juan-Luis López-Diez-Picazo, Andrea Moral, Cristian Rodriguez-Mañas, Leocadio Sensors (Basel) Article Lower-limb strength is a marker of functional decline in elders. This work studies the feasibility of using the quasi-periodic nature of the distance between a subjects’ back and the chair backrest during a 30-s chair–stand test (CST) to carry out unsupervised measurements based on readings from a low-cost ultrasound sensor. The device comprises an ultrasound sensor, an Arduino UNO board, and a Bluetooth module. Sit-to-stand transitions are identified by filtering the signal with a moving minimum filter and comparing the output to an adaptive threshold. An inter-rater reliability (IRR) study was carried out to validate the device ability to count the same number of valid transitions as the gold-standard manual count. A group of elders (age: mean (m) = 80.79 years old, SD = 5.38; gender: 21 female and seven male) were asked to perform a 30-s CST using the device while a trained nurse manually counted valid transitions. Ultimately, a moving minimum filter was necessary to cancel the effect of outliers, likely produced because older people tend to produce more motion artefacts and, thus, noisier signals. While the intra-class correlation coefficient (ICC) for this study was good (ICC = 0.86, 95% confidence interval (CI) = 0.73, 0.93), it is not yet clear whether the results are sufficient to support clinical decision-making. MDPI 2020-04-01 /pmc/articles/PMC7180983/ /pubmed/32244761 http://dx.doi.org/10.3390/s20071975 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Cobo, Antonio
Villalba-Mora, Elena
Hayn, Dieter
Ferre, Xavier
Pérez-Rodríguez, Rodrigo
Sánchez-Sánchez, Alberto
Bernabé-Espiga, Raquel
Sánchez-Sánchez, Juan-Luis
López-Diez-Picazo, Andrea
Moral, Cristian
Rodriguez-Mañas, Leocadio
Portable Ultrasound-Based Device for Detecting Older Adults’ Sit-to-Stand Transitions in Unsupervised 30-Second Chair–Stand Tests
title Portable Ultrasound-Based Device for Detecting Older Adults’ Sit-to-Stand Transitions in Unsupervised 30-Second Chair–Stand Tests
title_full Portable Ultrasound-Based Device for Detecting Older Adults’ Sit-to-Stand Transitions in Unsupervised 30-Second Chair–Stand Tests
title_fullStr Portable Ultrasound-Based Device for Detecting Older Adults’ Sit-to-Stand Transitions in Unsupervised 30-Second Chair–Stand Tests
title_full_unstemmed Portable Ultrasound-Based Device for Detecting Older Adults’ Sit-to-Stand Transitions in Unsupervised 30-Second Chair–Stand Tests
title_short Portable Ultrasound-Based Device for Detecting Older Adults’ Sit-to-Stand Transitions in Unsupervised 30-Second Chair–Stand Tests
title_sort portable ultrasound-based device for detecting older adults’ sit-to-stand transitions in unsupervised 30-second chair–stand tests
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7180983/
https://www.ncbi.nlm.nih.gov/pubmed/32244761
http://dx.doi.org/10.3390/s20071975
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