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New Accelerometric Method to Discriminate Between Asymptomatic Subjects and Patients With Medial Knee Osteoarthritis During 3-D Gait

This study presents a new method to estimate 3-D linear accelerations at tibial and femoral functional coordinate systems. The method combines the use of 3-D accelerometers, 3-D gyroscopes and reflective markers rigidly fixed on an exoskeleton and, a functional postural calibration method. Marker po...

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Published in:IEEE transactions on biomedical engineering 2008-04, Vol.55 (4), p.1415-1422
Main Authors: Turcot, Katia, Aissaoui, Rachid, Boivin, Karine, Pelletier, Michel, Hagemeister, Nicola, de Guise, Jacques A.
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description This study presents a new method to estimate 3-D linear accelerations at tibial and femoral functional coordinate systems. The method combines the use of 3-D accelerometers, 3-D gyroscopes and reflective markers rigidly fixed on an exoskeleton and, a functional postural calibration method. Marker positions were tracked by a six-camera optoelectronic system (VICON 460, Oxford Metrics). The purpose of this study was to determine if this method could discriminate between medial osteoarthritic and asymptomatic knees during gait. Nine patients with osteoarthritic knees and nine asymptomatic control subjects were included in this study. Eighteen parameters representing maximal, minimal, and range of acceleration values were extracted during the loading and preswing to mid-swing phase periods, and were compared in both groups. Results show good discriminative capacity of the new method. Eight parameters were significantly different between both groups. The proposed method has the potential to be used in comprehending and monitoring gait strategy in patients with osteoarthritic knee.
doi_str_mv 10.1109/TBME.2007.912428
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subjects Acceleration
Accelerometer and gyroscope
Accelerometers
Arthritis
Biomechanics
Computer Simulation
Diagnosis, Computer-Assisted - methods
Diagnosis, Differential
Discriminant Analysis
exoskeleton
Exoskeletons
Female
Gait
gait analysis
Gait Disorders, Neurologic - diagnosis
Gait Disorders, Neurologic - etiology
Gait Disorders, Neurologic - physiopathology
Gyroscopes
Humans
Imaging, Three-Dimensional - methods
internal and external accelerations
Joints
Knee
knee osteoarthritis (OA)
Male
Middle Aged
Models, Biological
Osteoarthritis
Osteoarthritis, Knee - complications
Osteoarthritis, Knee - diagnosis
Osteoarthritis, Knee - physiopathology
Pain
Reproducibility of Results
Sensitivity and Specificity
Shock waves
title New Accelerometric Method to Discriminate Between Asymptomatic Subjects and Patients With Medial Knee Osteoarthritis During 3-D Gait
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