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Published in: International Orthopaedics 2/2016

01-02-2016 | Original Paper

Infrared assessment of knee instability in ACL deficient patients

Authors: Aleksandar Matić, Suzana Petrović Savić, Branko Ristić, Vladan B. Stevanović, Goran Devedžić

Published in: International Orthopaedics | Issue 2/2016

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Abstract

Purpose

Previous clinical studies have shown that anterior cruciate ligament (ACL) ruptures require reconstructive surgery. The main goal of this study is an objective test definition for unstable knee diagnosis based on real measurements by using infrared cameras and adequate software.

Methods

In the study of gait analysis 35 males with deficient ACL’s participated. Pathological parameters for anterior posterior translation (APT) and internal external rotation (IER) and their values of kinematic data were obtained from a gait analysis 3D system. Movement curves were obtained by recording the position of fluorescent markers over time. A machine learning algorithm was developed in order to support decisions on the severity of the ACL injury and its corresponding deficiency. The algorithm was based on logistic regression.

Results

The value of APT, designated as exponentiation of the Ө coefficient (Exp (Ө)) of APT, showed that the likelihood of ACL-deficient knee occurrence due to higher values of APT is 1.1758 (95 % CI) times more frequent than that of the patients with lower values of APT. The value of IER, designated as Exp (Ө) of IER, showed that the patients with higher values of IER present 2.2516 (95 % CI) times higher values of ACL-deficient knee frequency than those with lower values.

Conclusion

This study showed that the creation of ordered pairs of pathological parameters gives a wider picture of ACL deficiency and that such an algorithm may improve both examination and treatment of patients.
Literature
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Metadata
Title
Infrared assessment of knee instability in ACL deficient patients
Authors
Aleksandar Matić
Suzana Petrović Savić
Branko Ristić
Vladan B. Stevanović
Goran Devedžić
Publication date
01-02-2016
Publisher
Springer Berlin Heidelberg
Published in
International Orthopaedics / Issue 2/2016
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-015-2839-y

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Acknowledgement to referees

Acknowledgement to referees