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Pressure Sensor System for Customized Scoliosis Braces

Hard-shell thoracolumbar sacral orthoses (TLSOs) are used for treating idiopathic scoliosis, a deformation of the spine with a sideways curvature. The pressure required inside the TLSO for ideal corrective results remains unclear. Retrofitting TLSOs with commercially available pressure measurement s...

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Detalles Bibliográficos
Autores principales: Fuss, Franz Konstantin, Ahmad, Asliza, Tan, Adin Ming, Razman, Rizal, Weizman, Yehuda
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7915694/
https://www.ncbi.nlm.nih.gov/pubmed/33562166
http://dx.doi.org/10.3390/s21041153
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author Fuss, Franz Konstantin
Ahmad, Asliza
Tan, Adin Ming
Razman, Rizal
Weizman, Yehuda
author_facet Fuss, Franz Konstantin
Ahmad, Asliza
Tan, Adin Ming
Razman, Rizal
Weizman, Yehuda
author_sort Fuss, Franz Konstantin
collection PubMed
description Hard-shell thoracolumbar sacral orthoses (TLSOs) are used for treating idiopathic scoliosis, a deformation of the spine with a sideways curvature. The pressure required inside the TLSO for ideal corrective results remains unclear. Retrofitting TLSOs with commercially available pressure measurement systems is expensive and can only be performed in a laboratory. The aim of this study was to develop a cost-effective but accurate pressure sensor system for TLSOs. The sensor was built from a piezoresistive polymer, placed between two closed-cell foam liners, and evaluated with a material testing machine. Because foams are energy absorbers, the pressure-conductance curve was affected by hysteresis. The sensor was calibrated on a force plate with the transitions from loading to unloading used to establish the calibration curve. The root mean square error was 12% on average within the required pressure range of 0.01–0.13 MPa. The sensor reacted to the changing pressure during breathing and different activities when tested underneath a chest belt at different tensions. The peak pressure reached 0.135 MPa. The sensor was further tested inside the scoliosis brace during different activities. The measured pressure was 0.014–0.124 MPa. The results from this study enable cheaper and mobile systems to be used for clinical studies on the comfort and pressure of braces during daily activities.
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spelling pubmed-79156942021-03-01 Pressure Sensor System for Customized Scoliosis Braces Fuss, Franz Konstantin Ahmad, Asliza Tan, Adin Ming Razman, Rizal Weizman, Yehuda Sensors (Basel) Article Hard-shell thoracolumbar sacral orthoses (TLSOs) are used for treating idiopathic scoliosis, a deformation of the spine with a sideways curvature. The pressure required inside the TLSO for ideal corrective results remains unclear. Retrofitting TLSOs with commercially available pressure measurement systems is expensive and can only be performed in a laboratory. The aim of this study was to develop a cost-effective but accurate pressure sensor system for TLSOs. The sensor was built from a piezoresistive polymer, placed between two closed-cell foam liners, and evaluated with a material testing machine. Because foams are energy absorbers, the pressure-conductance curve was affected by hysteresis. The sensor was calibrated on a force plate with the transitions from loading to unloading used to establish the calibration curve. The root mean square error was 12% on average within the required pressure range of 0.01–0.13 MPa. The sensor reacted to the changing pressure during breathing and different activities when tested underneath a chest belt at different tensions. The peak pressure reached 0.135 MPa. The sensor was further tested inside the scoliosis brace during different activities. The measured pressure was 0.014–0.124 MPa. The results from this study enable cheaper and mobile systems to be used for clinical studies on the comfort and pressure of braces during daily activities. MDPI 2021-02-06 /pmc/articles/PMC7915694/ /pubmed/33562166 http://dx.doi.org/10.3390/s21041153 Text en © 2021 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
Fuss, Franz Konstantin
Ahmad, Asliza
Tan, Adin Ming
Razman, Rizal
Weizman, Yehuda
Pressure Sensor System for Customized Scoliosis Braces
title Pressure Sensor System for Customized Scoliosis Braces
title_full Pressure Sensor System for Customized Scoliosis Braces
title_fullStr Pressure Sensor System for Customized Scoliosis Braces
title_full_unstemmed Pressure Sensor System for Customized Scoliosis Braces
title_short Pressure Sensor System for Customized Scoliosis Braces
title_sort pressure sensor system for customized scoliosis braces
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7915694/
https://www.ncbi.nlm.nih.gov/pubmed/33562166
http://dx.doi.org/10.3390/s21041153
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