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|Title: ||A non-invasive biomechanical device to quantify knee rotational laxity: Verification of the device in human cadaveric specimens|
|Authors: ||Lee, Jeffrey Chun-Yin|
Yung, Patrick Shu-Hang
Hung, Aaron See-Long
Fong, Daniel Tik-Pui
|Keywords: ||Tibial rotation|
|Issue Date: ||2018|
|Publisher: ||© 2018 Asia Pacific Knee, Arthroscopy and Sports Medicine Society. Published by Elsevier BV|
|Citation: ||LEE, J. C-Y. ... et al., 2018. A non-invasive biomechanical device to quantify knee rotational laxity: Verification of the device in human cadaveric specimens. Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology, 16, pp.19-23.|
|Abstract: ||Background: Biomechanical measurement tools have been developed and widely used to precisely
quantify knee anterior-posterior laxity after anterior cruciate ligament (ACL) injury. However, validated
objective device to document knee rotational laxity, though being developed by different researchers, are
not yet widely used in the daily clinical practice. A new biomechanical device was developed to quantify
knee internal and external rotations.
Methods: The reliability of the new biomechanical device which measures knee rotations were tested.
Different torques (1-10Nm) were applied by the device to internally and externally rotate human
cadaveric knees, which were held in a flexion angle of 30 . The rotations were measured by the device in
degrees. There were two independent testers, and each tester carried out three trials. Intra-rater and
inter-rater reliability were quantified in terms of intraclass correlation (ICC) coefficient among trials and
between testers. The device was verified by the comparison with a computer assisted navigation system.
ICC was measured. Mean, standard deviation and 95% confident interval of the difference as well as the
root mean square difference were calculated. The correlations were deemed to be reliable if the ICC was
Results: The intra-rater and inter-rater reliability achieved high correlation for both internal and external
rotation, ranged from 0.959 to 0.992. ICC between the proposed meter and the navigation system for
both internal and external rotation was 0.78. The mean differences were 2.3 and 2.5 for internal and
external rotation respectively.
Conclusions: A new knee rotational laxity meter was proposed in this study. Its reliability was verified by
showing high correlation among trials. It also showed good correlation to a gold standard of measurement. It might be used to document knee rotational laxity for various purposes, especially after ACL
injury, after further validation of the device in human subjects|
|Description: ||This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/|
|Sponsor: ||This research project was made possible by equipment/resources donated by The Hong Kong Jockey Club Charities Trust and
supported by Innovation and Technology Fund (ITS/039/09, InP/
277/09, InP/313/09), The Government of the Hong Kong Special
|Publisher Link: ||https://doi.org/10.1016/j.asmart.2018.11.005|
|Appears in Collections:||Published Articles (Sport, Exercise and Health Sciences)|
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