caa a22 4500 605458499 CHVBK 20210128100229.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00167-015-3768-4 doi (NATIONALLICENCE)springer-10.1007/s00167-015-3768-4 Robotic axial lower leg testing: repeatability and reproducibility [Elektronische Daten] [Thomas Branch, Shaun Stinton, Maya Sternberg, William Hutton, Frédéric Lavoie, Christian Guier, Philippe Neyret] Purpose: The purpose of this study was to determine the test-retest reliability and the repeatability over multiple days of a robotic testing device when used to measure laxity of the lower leg during a simulated dial test. Methods: Ten healthy subjects were evaluated using an instrumented robotic lower leg testing system over 4days. Three testing cycles were performed each day. Each leg was rotated into external and then internal rotation by servomotors until a torque threshold of 5.65N m was reached. Load-deformation curves were generated from torque and rotation data. Both average-measure and single-measure intraclass correlation coefficients (ICC) were compared across the curves. ICC scores were also compared for features of the curves including: maximum external rotation at −5.65N m of torque, maximum internal rotation at 5.65N m of torque, rotation at torque 0, compliance (slope of load-deformation curve) at torque 0, endpoint compliance in external rotation, endpoint compliance in internal rotation, and play at torque 0. Play at torque 0 was defined as the width of the hysteresis curve at torque 0. Results: Average-measure ICC scores and test-retest scores were >0.95 along the entire load-deformation curve except around zero torque. ICC scores at maximum internal and external rotation ranged from 0.87 to 0.99 across the left and right knees. ICC scores for the other features of the curves ranged from 0.61 to 0.98. The standard error of the mean ranged from 0.0497 to 1.1712. Conclusions: The robotic testing device in this study proved to be reliable for testing a subject multiple times both within the same day and over multiple days. These findings suggest that the device can provide a level of reliability in rotational testing that allows for clinical use of test results. Objective laxity data can improve consistency and accuracy in diagnosing knee injuries and may enable more effective treatment. The Author(s), 2015 Knee laxity nationallicence Manual examination nationallicence Robotic testing nationallicence Reliability nationallicence Rotational laxity nationallicence Branch Thomas University Orthopedics, Decatur, GA, USA aut Stinton Shaun ArthroMetrix, LLC, 441 Armour Place NE, 30324, Atlanta, GA, USA aut Sternberg Maya Quartiles Consulting, Atlanta, GA, USA aut Hutton William Department of Orthopaedics, Emory University School of Medicine, Atlanta, GA, USA aut Lavoie Frédéric Hôpital Notre-Dame du CHUM, Montréal, Canada aut Guier Christian San Francisco Sports Medicine and Orthopaedic Surgery, San Francisco, CA, USA aut Neyret Philippe Department of Orthopaedic Surgery, Centre Albert Trillat, Hôpital de la Croix-Rousse, Lyon, France aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/10(2015-10-01), 2892-2899 0942-2056 23:10<2892 2015 23 167 https://doi.org/10.1007/s00167-015-3768-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-015-3768-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Branch Thomas University Orthopedics, Decatur, GA, USA aut NATIONALLICENCE 700 1- Stinton Shaun ArthroMetrix, LLC, 441 Armour Place NE, 30324, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Sternberg Maya Quartiles Consulting, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Hutton William Department of Orthopaedics, Emory University School of Medicine, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Lavoie Frédéric Hôpital Notre-Dame du CHUM, Montréal, Canada aut NATIONALLICENCE 700 1- Guier Christian San Francisco Sports Medicine and Orthopaedic Surgery, San Francisco, CA, USA aut NATIONALLICENCE 700 1- Neyret Philippe Department of Orthopaedic Surgery, Centre Albert Trillat, Hôpital de la Croix-Rousse, Lyon, France aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/10(2015-10-01), 2892-2899 0942-2056 23:10<2892 2015 23 167