Unilateral non-electric assistive walking device helps neurological and orthopedic patients to improve gait patterns

Feodoroff, Boris; Blümer, Vera

doi:10.1016/j.gaitpost.2021.11.016

Cited by 6 publications

(14 citation statements)

References 38 publications

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“…Our finding of reduced spatial measures (step, stride, swing, and stance length) while walking in the EXO is not consistent with some recent studies on passive hip exoskeletons (Feodoroff and Blümer, 2022;Panizzolo et al, 2021;Pirscoveanu et al, 2022). Participants in these earlier studies exhibited either enhanced spatiotemporal measures (i.e., increased step length) or no differences between EXO and baseline conditions.…”

Section: Spatiotemporal Measurescontrasting

confidence: 99%

“…Therefore, we believe that experienced users adapted to EXO use by walking with significantly less anterior pelvic tilt, both to compensate for the restricted support from the EXO ankle joints and to use their hip joints more effectively. Although our results on gait spatiotemporal measures may not be directly comparable to earlier passive hip exoskeletons, our findings of increased hip flexion and decreased hip extension during the use of EXO aligns with recent results reported by Feodoroff and Blümer (2022).…”

Section: Joint Kinematicssupporting

confidence: 83%

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A pilot study investigating motor adaptations when learning to walk with a whole-body powered exoskeleton

Park¹,

Kim²,

Nussbaum³

et al. 2023

Journal of Electromyography and Kinesiology

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Section: Spatiotemporal Measurescontrasting

confidence: 99%

Section: Joint Kinematicssupporting

confidence: 83%

A pilot study investigating motor adaptations when learning to walk with a whole-body powered exoskeleton

Park¹,

Kim²,

Nussbaum³

et al. 2023

Journal of Electromyography and Kinesiology

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“…Another way to improve gait is through the use of exoskeletons, which have been proven to reduce metabolic cost 7 , increase gait velocity 8,9 , and aid during obstacles avoidance 10 . Additionally, hip exoskeletons have been shown to cause kinematic adaptations often seen by increasing hip flexion 11 . All of which could lead to a reduced fall incidence 11 .…”

Section: Introductionmentioning

confidence: 99%

Overground Walking with a Passive Hip Exoskeleton during Obstacle Avoidance in Young Able-Bodied Adults

Pirscoveanu

Hansen

Pedersen

et al. 2022

Crit Rev Phys Rehabil Med

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During everyday walking, we encounter challenges such as uneven terrain or curbs, all requiring adjustments to our gait patterns. These adjustments are made to circumvent the given obstacles and avoid falling or tripping. Exoskeletons have proven to assist walking by increasing walking speed and step length. However, most exoskeleton studies are traditionally carried out in a laboratory setting, which is an inaccurate depiction of everyday outdoor walking conditions. This study investigated the spatiotemporal gait parameters and hip kinematics during outdoor walking situations while wearing a passive-assistive hip exoskeleton (aLQ). Eleven healthy male participants walked on three 10-meters obstacle tracks at their self-selected walking speed with and without aLQ. The tracks were designed for the participants to 1) step up onto a sidewalk, 2) step over a pothole, and 3) walk without any obstacle (control situation). The cadence, gait velocity, step length, double stance time, and the 3D hip range of motion angles were extracted and compared for each track with and without aLQ. No significant changes were found for the spatiotemporal parameters with and without exoskeleton when navigating the obstacles. However, a significant decrease in the right hip internal rotation was observed when wearing the exoskeleton compared with without while stepping over (21%, p=0.05) and while walking with no obstacle (6%, p=0.04). These findings indicate that the gait of able-bodied adults was mostly unaffected during overground walking with a passive-assistive hip exoskeleton while navigating obstacles, proving that exoskeletons could be used safely in everyday situations.

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“…The residual membrane stresses during the fracture mechanisms are crucial to understand, elucidate, and clarify in future experimental work in order to develop better performance of the biomaterials. This biomaterial with higher stresses is used in articular cartilage scaffold, which aids in absorbing and delaying external forces and shocks that attack osteoarthritic patients during their daily activities [ 5 ]. This is an innovative feature that has the potential to be developed for the prevention of blunt-force trauma effects [ 9 ].…”

Section: Discussionmentioning

confidence: 99%

“…The osteoarthritis patients suffered from decreased cell viability [ 1 ] during cartilage tissue cell regeneration therapy [ 2 ]. This is due to the fact that most of the articular cartilage scaffolds used for this therapy [ 3 ] did not protect external forces or shock impacts from attacking osteoarthritis patients [ 4 ] during their daily activities [ 5 ]. The biomaterials used in the scaffolds [ 1 ] are harder than the cartilage tissue cells, resulting in the cells failing [ 6 ] before them.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study on Relationship between the Fracture Mechanisms and Residual Membrane Stresses of Metallic Material

Miskon

Zaidi

Ahmad

et al. 2022

JFB

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The distribution and dissipation energies in fracture mechanisms were a critical challenge to derive, especially for this ultra-thin sample. The membrane failure, which is the end of the fracture mechanisms, is a result of the cone wave reflections from the backend membrane boundaries. These reflections delay the failure processes due to the shock impacts. To compare these results with the experimental work, a numerical simulation was conducted for these processes. The cylinder-shaped rigid projectile was impacted using a frictionless Lagrange solver. The target was a cartridge brass circle plate clamped at its perimeter, and its zone was refined to a ten-times higher meshing density for better analysis. The erosion and cut-off controls involved a zero-gap interaction condition and an instantaneous geometric erosion strain of 200%. Due to the maximum projectile velocity of 382 m/s having the slowest perforation, the target thickness was found to be 5.5 mm. The fracture mechanism phenomena, such as tensile, compressive, through-thickness, and growth in-plane delamination, propagating delamination, and local punch shear waves were observed. After deducting tensile and flexural strengths from the last experiment, a total residual membrane stress of 650 MPa was found. This result indicated a relationship between the fracture mechanisms and residual membrane stresses of metallic material.

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Unilateral non-electric assistive walking device helps neurological and orthopedic patients to improve gait patterns

Cited by 6 publications

References 38 publications

A pilot study investigating motor adaptations when learning to walk with a whole-body powered exoskeleton

A pilot study investigating motor adaptations when learning to walk with a whole-body powered exoskeleton

Overground Walking with a Passive Hip Exoskeleton during Obstacle Avoidance in Young Able-Bodied Adults

Numerical Simulation Study on Relationship between the Fracture Mechanisms and Residual Membrane Stresses of Metallic Material

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