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Rotational knee laxity: Reliability of a simple measurement device in vivo
BACKGROUND: Double bundle ACL reconstruction has been demonstrated to decrease rotational knee laxity. However, there is no simple, commercially-available device to measure knee rotation. The investigators developed a simple, non-invasive device to measure knee rotation. In conjunction with a rigid...
Autores principales: | , , , , , , |
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Formato: | Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2008
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2315651/ https://www.ncbi.nlm.nih.gov/pubmed/18366671 http://dx.doi.org/10.1186/1471-2474-9-35 |
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author | Tsai, Andrew G Musahl, Volker Steckel, Hanno Bell, Kevin M Zantop, Thore Irrgang, James J Fu, Freddie H |
author_facet | Tsai, Andrew G Musahl, Volker Steckel, Hanno Bell, Kevin M Zantop, Thore Irrgang, James J Fu, Freddie H |
author_sort | Tsai, Andrew G |
collection | PubMed |
description | BACKGROUND: Double bundle ACL reconstruction has been demonstrated to decrease rotational knee laxity. However, there is no simple, commercially-available device to measure knee rotation. The investigators developed a simple, non-invasive device to measure knee rotation. In conjunction with a rigid boot to rotate the tibia and a force/moment sensor to allow precise determination of torque about the knee, a magnetic tracking system measures the axial rotation of the tibia with respect to the femur. This device has been shown to have acceptable levels of test re-test reliability to measure knee rotation in cadaveric knees. METHODS: The objective of this study was to determine reliability of the device in measuring knee rotation of human subjects. Specifically, the intra-tester reliability within a single testing session, test-retest reliability between two testing sessions, and inter-tester reliability were assessed for 11 male subjects with normal knees. RESULTS: The 95% confidence interval for rotation was less than 5° for intra-tester, test-retest, and inter-tester reliability, and the standard error of measurement for the differences between left and right knees was found to be less than 3°. CONCLUSION: It was found that the knee rotation measurements obtained with this device have acceptable limits of reliability for clinical use and interpretation. |
format | Text |
id | pubmed-2315651 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2008 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-23156512008-04-17 Rotational knee laxity: Reliability of a simple measurement device in vivo Tsai, Andrew G Musahl, Volker Steckel, Hanno Bell, Kevin M Zantop, Thore Irrgang, James J Fu, Freddie H BMC Musculoskelet Disord Research Article BACKGROUND: Double bundle ACL reconstruction has been demonstrated to decrease rotational knee laxity. However, there is no simple, commercially-available device to measure knee rotation. The investigators developed a simple, non-invasive device to measure knee rotation. In conjunction with a rigid boot to rotate the tibia and a force/moment sensor to allow precise determination of torque about the knee, a magnetic tracking system measures the axial rotation of the tibia with respect to the femur. This device has been shown to have acceptable levels of test re-test reliability to measure knee rotation in cadaveric knees. METHODS: The objective of this study was to determine reliability of the device in measuring knee rotation of human subjects. Specifically, the intra-tester reliability within a single testing session, test-retest reliability between two testing sessions, and inter-tester reliability were assessed for 11 male subjects with normal knees. RESULTS: The 95% confidence interval for rotation was less than 5° for intra-tester, test-retest, and inter-tester reliability, and the standard error of measurement for the differences between left and right knees was found to be less than 3°. CONCLUSION: It was found that the knee rotation measurements obtained with this device have acceptable limits of reliability for clinical use and interpretation. BioMed Central 2008-03-18 /pmc/articles/PMC2315651/ /pubmed/18366671 http://dx.doi.org/10.1186/1471-2474-9-35 Text en Copyright © 2008 Tsai et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( (http://creativecommons.org/licenses/by/2.0) ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Tsai, Andrew G Musahl, Volker Steckel, Hanno Bell, Kevin M Zantop, Thore Irrgang, James J Fu, Freddie H Rotational knee laxity: Reliability of a simple measurement device in vivo |
title | Rotational knee laxity: Reliability of a simple measurement device in vivo |
title_full | Rotational knee laxity: Reliability of a simple measurement device in vivo |
title_fullStr | Rotational knee laxity: Reliability of a simple measurement device in vivo |
title_full_unstemmed | Rotational knee laxity: Reliability of a simple measurement device in vivo |
title_short | Rotational knee laxity: Reliability of a simple measurement device in vivo |
title_sort | rotational knee laxity: reliability of a simple measurement device in vivo |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2315651/ https://www.ncbi.nlm.nih.gov/pubmed/18366671 http://dx.doi.org/10.1186/1471-2474-9-35 |
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