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Published on: February 10, 2015
Intra-rater and inter-rater reliability of robotic arthrometer DYNEELAX®
Katja Mihalinec1, Carmen B Martinez-Cepa2, Juan C Zuil-Escobar2
1Department of Physiotherapy Biomechanical Laboratory, Faculty of Health Sciences, University of Ljubljana Ljubljana Slovenia.
The DYNEELAX® arthrometer demonstrates good to excellent reliability for measuring rotational knee laxity. It shows moderate reliability for anterior knee laxity in healthy individuals, providing valuable data for knee assessments.
Area of Science:
- Orthopedics
- Biomechanics
- Sports Medicine
Background:
- Assessing knee joint stability is crucial for diagnosing injuries and guiding treatment.
- Rotational laxity measurement is a novel application for arthrometers.
- Establishing reliability of new diagnostic tools is essential before clinical use.
Purpose of the Study:
- To evaluate the intra-rater and inter-rater reliability of the DYNEELAX® arthrometer.
- To determine normative values for rotational knee laxity in healthy subjects.
- To assess the reliability of measuring both anterior and rotational knee laxity.
Main Methods:
- Seventy-three healthy subjects (39 female, 34 male) participated in the study.
- Knee anterior and rotational laxity were measured using the DYNEELAX® arthrometer.
- Intraclass correlation coefficients (ICCs) were calculated to assess reliability.
Main Results:
- Intra-rater reliability ICCs ranged from 0.631 to 0.699 for anterior laxity and 0.916 to 0.94 for rotational laxity.
- Inter-rater reliability ICCs ranged from 0.578 to 0.646 for anterior laxity and 0.822 to 0.933 for rotational laxity.
- Rotational laxity measurements showed higher reliability than anterior laxity measurements.
Conclusions:
- The DYNEELAX® arthrometer exhibits good to excellent intra-rater and inter-rater reliability for rotational knee laxity.
- Moderate intra-rater reliability was found for anterior knee laxity in healthy subjects.
- Further research is recommended to explore the clinical significance of DYNEELAX® measurements in patients with knee pathologies.
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