Mobilizing Knowledge: The Evidence Gap for Assistive Devices

Lemaire, Edward D.

doi:10.22215/timreview/1018

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…This initial SLL design provides a strong first step to build upon and worthy of further investigation for quantitative evaluation of the more than 60 unique AFO designs available on the market. 1 This quantitative information is not currently available to guide assistive device prescription. While the SLL can achieve the desired RoM, a main contributor to differences between actual motion and target motion was FDM dimensional inaccuracy.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…Ankle-foot orthoses (AFOs) assist individuals who have problems controlling their lower limb. While many AFO designs exist, 1 the principal goal is to control ankle rotation by providing additional stiffness to the joint. Since AFOs are highly diverse in their designs, a method for evaluating device durability and function would be valuable to inform prescription.…”

Section: Introductionmentioning

confidence: 99%

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Surrogate lower limb design for ankle-foot orthosis mechanical evaluation

Thibodeau

Dumond

Kim

et al. 2022

Journal of Rehabilitation and Assistive Technologies Engineerin

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Purpose This study designs and provides a pilot evaluation of a novel surrogate lower limb (SLL) that provides anatomically realistic three-dimensional (3D) foot motion, based on a literature consensus of passive lower limb motion. This SLL is intended to replace single axis surrogates currently used in mechanical testing of ankle-foot orthoses (AFO). Material and Methods The SLL design is inspired by the Rizzoli foot model, with shank, hindfoot, midfoot, forefoot, and toe sections. Ball and socket joints were used between hindfoot-midfoot (HM)-forefoot sections. Forefoot-toes used a hinge joint. Three-dimensional printed nylon, thermoplastic polyurethane (TPU) and polylactic acid (PLA), as well as casted silicone rubber were used to re-create foot components. After fabrication, motion capture was performed to measure rotation using fiducial markers. The SLL was then loaded under both static and cyclic loads representing a 100 kg person walking for 500,000 cycles. Results Most joints were within 5° of target angles. The SLL survived static loads representing 1.5 times body weight for both static and cyclical loading. Conclusions This SLL moved as designed and survived testing loads, warranting further investigation towards enabling essential mechanical testing for AFO currently on the market, and helping to guide device prescription.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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