Roll-over characteristics in patients with peripheral artery disease during pain-free and painful overground walking
Author ORCID Identifier
0000-0003-0252-7773
Advisor Information
Sara Myers
Location
MBSC 224
Presentation Type
Oral Presentation
Start Date
6-3-2020 12:45 PM
End Date
6-3-2020 2:00 PM
Abstract
Human lower limbs demonstrate rocker like qualities during the stance phase of walking that facilitate the forward progression of the body. These rockers are quantified using equivalent roll-over shapes (ROS) which are invariant to walking speed, carrying additional weight and wearing different types of footwear. The aim of this work was to investigate the roll-over characteristics in patients with peripheral artery disease (PAD) during pain-free and painful overground walking. Gait data of ten patients with PAD walking overground at self-selected walking speed was collected using eight-camera motion capture system and a force plate embedded in the ground. Walking prior to the onset of pain was collected, followed by walking after claudication onset. The center-of-pressure data was transformed into the shank-based coordinate system to generate ROS, which was then fit to circular arcs using a MATLAB based optimization algorithm. Paired t-tests were used to determine the significant differences between the two walking conditions (p=0.05). Statistical analysis showed that the mean roll-over radius (p=0.819) and mean arc length (p=0.626) parameters were not significantly different between the pain-free and pain walking conditions. Our results indicate that the ROS is preserved even during claudication pain in patients with PAD. These findings corroborate with the general invariance model of ROS during different walking conditions in healthy individuals and thus, signify the use of ROS as a design goal for the assistive devices (orthosis/ exoskeleton) that are under development to assist patients with PAD.
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Roll-over characteristics in patients with peripheral artery disease during pain-free and painful overground walking
MBSC 224
Human lower limbs demonstrate rocker like qualities during the stance phase of walking that facilitate the forward progression of the body. These rockers are quantified using equivalent roll-over shapes (ROS) which are invariant to walking speed, carrying additional weight and wearing different types of footwear. The aim of this work was to investigate the roll-over characteristics in patients with peripheral artery disease (PAD) during pain-free and painful overground walking. Gait data of ten patients with PAD walking overground at self-selected walking speed was collected using eight-camera motion capture system and a force plate embedded in the ground. Walking prior to the onset of pain was collected, followed by walking after claudication onset. The center-of-pressure data was transformed into the shank-based coordinate system to generate ROS, which was then fit to circular arcs using a MATLAB based optimization algorithm. Paired t-tests were used to determine the significant differences between the two walking conditions (p=0.05). Statistical analysis showed that the mean roll-over radius (p=0.819) and mean arc length (p=0.626) parameters were not significantly different between the pain-free and pain walking conditions. Our results indicate that the ROS is preserved even during claudication pain in patients with PAD. These findings corroborate with the general invariance model of ROS during different walking conditions in healthy individuals and thus, signify the use of ROS as a design goal for the assistive devices (orthosis/ exoskeleton) that are under development to assist patients with PAD.