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A moving fluoroscope to capture tibiofemoral kinematics during complete cycles of free level and downhill walking as well as stair descent

Videofluoroscopy has been shown to provide essential information in the evaluation of the functionality of total knee arthroplasties. However, due to the limitation in the field of view, most systems can only assess knee kinematics during highly restricted movements. To avoid the limitations of a st...

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Autores principales: List, Renate, Postolka, Barbara, Schütz, Pascal, Hitz, Marco, Schwilch, Peter, Gerber, Hans, Ferguson, Stephen J., Taylor, William R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5633186/
https://www.ncbi.nlm.nih.gov/pubmed/29016647
http://dx.doi.org/10.1371/journal.pone.0185952
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author List, Renate
Postolka, Barbara
Schütz, Pascal
Hitz, Marco
Schwilch, Peter
Gerber, Hans
Ferguson, Stephen J.
Taylor, William R.
author_facet List, Renate
Postolka, Barbara
Schütz, Pascal
Hitz, Marco
Schwilch, Peter
Gerber, Hans
Ferguson, Stephen J.
Taylor, William R.
author_sort List, Renate
collection PubMed
description Videofluoroscopy has been shown to provide essential information in the evaluation of the functionality of total knee arthroplasties. However, due to the limitation in the field of view, most systems can only assess knee kinematics during highly restricted movements. To avoid the limitations of a static image intensifier, a moving fluoroscope has been presented as a standalone system that allows tracking of the knee during multiple complete cycles of level- and downhill-walking, as well as stair descent, in combination with the synchronous assessment of ground reaction forces and whole body skin marker measurements. Here, we assess the ability of the system to keep the knee in the field of view of the image intensifier. By measuring ten total knee arthroplasty subjects, we demonstrate that it is possible to maintain the knee to within 1.8 ± 1.4 cm vertically and 4.0 ± 2.6 cm horizontally of the centre of the intensifier throughout full cycles of activities of daily living. Since control of the system is based on real-time feedback of a wire sensor, the system is not dependent on repeatable gait patterns, but is rather able to capture pathological motion patterns with low inter-trial repeatability.
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spelling pubmed-56331862017-10-30 A moving fluoroscope to capture tibiofemoral kinematics during complete cycles of free level and downhill walking as well as stair descent List, Renate Postolka, Barbara Schütz, Pascal Hitz, Marco Schwilch, Peter Gerber, Hans Ferguson, Stephen J. Taylor, William R. PLoS One Research Article Videofluoroscopy has been shown to provide essential information in the evaluation of the functionality of total knee arthroplasties. However, due to the limitation in the field of view, most systems can only assess knee kinematics during highly restricted movements. To avoid the limitations of a static image intensifier, a moving fluoroscope has been presented as a standalone system that allows tracking of the knee during multiple complete cycles of level- and downhill-walking, as well as stair descent, in combination with the synchronous assessment of ground reaction forces and whole body skin marker measurements. Here, we assess the ability of the system to keep the knee in the field of view of the image intensifier. By measuring ten total knee arthroplasty subjects, we demonstrate that it is possible to maintain the knee to within 1.8 ± 1.4 cm vertically and 4.0 ± 2.6 cm horizontally of the centre of the intensifier throughout full cycles of activities of daily living. Since control of the system is based on real-time feedback of a wire sensor, the system is not dependent on repeatable gait patterns, but is rather able to capture pathological motion patterns with low inter-trial repeatability. Public Library of Science 2017-10-09 /pmc/articles/PMC5633186/ /pubmed/29016647 http://dx.doi.org/10.1371/journal.pone.0185952 Text en © 2017 List et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
List, Renate
Postolka, Barbara
Schütz, Pascal
Hitz, Marco
Schwilch, Peter
Gerber, Hans
Ferguson, Stephen J.
Taylor, William R.
A moving fluoroscope to capture tibiofemoral kinematics during complete cycles of free level and downhill walking as well as stair descent
title A moving fluoroscope to capture tibiofemoral kinematics during complete cycles of free level and downhill walking as well as stair descent
title_full A moving fluoroscope to capture tibiofemoral kinematics during complete cycles of free level and downhill walking as well as stair descent
title_fullStr A moving fluoroscope to capture tibiofemoral kinematics during complete cycles of free level and downhill walking as well as stair descent
title_full_unstemmed A moving fluoroscope to capture tibiofemoral kinematics during complete cycles of free level and downhill walking as well as stair descent
title_short A moving fluoroscope to capture tibiofemoral kinematics during complete cycles of free level and downhill walking as well as stair descent
title_sort moving fluoroscope to capture tibiofemoral kinematics during complete cycles of free level and downhill walking as well as stair descent
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5633186/
https://www.ncbi.nlm.nih.gov/pubmed/29016647
http://dx.doi.org/10.1371/journal.pone.0185952
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