Vaulting quantification during level walking of transfemoral amputees

Drevelle, Xavier; Villa, Coralie; Bonnet, Xavier; Loiret, Isabelle; Fodé, Pascale; Pillet, Hélène

doi:10.1016/j.clinbiomech.2014.04.006

Cited by 25 publications

(29 citation statements)

References 11 publications

(15 reference statements)

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“…Vaulting is usually quantified by measuring peak ankle flexion power during single support [31]. However, in the present work, we utilize an alternative to kinetic quantification, using only kinematic parameters.…”

Section: Data and Statistical Analysesmentioning

confidence: 99%

“…In this work, we study the kinematic and kinetic attributes characterizing these compensations. The most common compensations associated with the use of passive prostheses are related to prosthetic foot clearance resulting from under-powered plantarflexion during pushoff and knee flexion during swing [30], [31]. Since individual amputees develop different compensatory mechanisms, we focused our analyses on traits that were the most apparent with the amputee participant, namely, vaulting and hip circumduction.…”

Section: Introductionmentioning

confidence: 99%

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A Phase Variable Approach for Improved Rhythmic and Non-Rhythmic Control of a Powered Knee-Ankle Prosthesis

et al. 2019

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Although there has been recent progress in control of multi-joint prosthetic legs for rhythmic tasks such as walking, control of these systems for non-rhythmic motions and general real-world maneuvers is still an open problem. In this article, we develop a new controller that is capable of both rhythmic (constant-speed) walking, transitions between speeds and/or tasks, and some common volitional leg motions. We introduce a new piecewise holonomic phase variable, which, through a finite state machine, forms the basis of our controller. The phase variable is constructed by measuring the thigh angle, and the transitions in the finite state machine are formulated through sensing foot contact along with attributes of a nominal reference gait trajectory. The controller was implemented on a powered knee-ankle prosthesis and tested with a transfemoral amputee subject, who successfully performed a wide range of rhythmic and non-rhythmic tasks, including slow and fast walking, quick start and stop, backward walking, walking over obstacles, and kicking a soccer ball. Use of the powered leg resulted in clinically significant reductions in amputee compensations for rhythmic tasks (including vaulting and hip circumduction) when compared to use of the take-home passive leg. In addition, considerable improvements were also observed in the performance for nonrhythmic tasks. The proposed approach is expected to provide a better understanding of rhythmic and non-rhythmic motions in a unified framework, which in turn can lead to more reliable control of multi-joint prostheses for a wider range of real-world tasks.

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Section: Data and Statistical Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Phase Variable Approach for Improved Rhythmic and Non-Rhythmic Control of a Powered Knee-Ankle Prosthesis

et al. 2019

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“…The early detection of TO can be a pre-indicator to the prosthetic controller to take action to ensure proper toe clearance during the swing phase [30].…”

Section: Lack Of Proper Tomentioning

confidence: 99%

A Real-Time Gait Event Detection for Lower Limb Prosthesis Control and Evaluation

Maqbool

Husman

Awad

et al. 2017

IEEE Trans. Neural Syst. Rehabil. Eng.

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Abstract-Lower extremity amputees suffer from mobility limitations which will result in a degradation of their quality of life. Wearable sensors are frequently used to assess spatiotemporal, kinematic and kinetic parameters providing the means to establish an interactive control of the amputee-prosthesisenvironment system. Gait events and the gait phase detection of an amputee's locomotion are vital for controlling lower limb prosthetic devices. The paper presents an approach to real-time gait event detection for lower limb amputees using a wireless gyroscope attached to the shank when performing level ground and ramp activities. The results were validated using both healthy and amputee subjects and showed that the time differences in identifying Initial Contact (IC) and Toe Off (TO) events were larger in a transfemoral amputee when compared to the control subjects and a transtibial amputee (TTA). Overall, the time difference latency lies within a range of ± 50 ms while the detection rate was 100% for all activities. Based on the validated results, the IC and TO events can be accurately detected using the proposed system in both control subjects and amputees when performing activities of daily living and can also be utilized in the clinical setup for rehabilitation and assessing the performance of lower limb prosthesis users.

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“…Vaulting strategy is often used in this population to guarantee toe clearance of the prosthetic limb even on flat surfaces (Drevelle et al, 2014). The present study will focus on vaulting gait identification and quantification in challenging situations of daily living in individuals with transfemoral amputation.…”

Section: Introductionmentioning

confidence: 99%

“…The present study will focus on vaulting gait identification and quantification in challenging situations of daily living in individuals with transfemoral amputation. Although this strategy is considered as a deleterious gait deviation by rehabilitation staff, only one very recent study proposed to quantify it during level walking of people with transfemoral amputation (Drevelle et al, 2014). The criterion used in this study was the generated power during mid-stance at the contralateral ankle of patients with transfemoral amputation.…”

Section: Introductionmentioning

confidence: 99%

Evolution of vaulting strategy during locomotion of individuals with transfemoral amputation on slopes and cross-slopes compared to level walking

Villa¹,

Drevelle²,

Bonnet³

et al. 2015

Clinical Biomechanics

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Vaulting seems to be widely used by patients with transfemoral amputation in daily living situations. The number of patients using vaulting increased with the difficulty of the walking situation. Results also suggested that patients could dose the amount of vaulting according to gait environment to secure prosthetic toe clearance. During rehabilitation, vaulting should also be corrected or prevented in daily living tasks.

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Vaulting quantification during level walking of transfemoral amputees

Abstract: Vaulting for transfemoral amputees is characterized by a propulsive plantar flexion at the contralateral ankle. Quantifying the ankle flexion power during the contralateral single support phase will help in understanding vaulting.

Cited by 25 publications

References 11 publications

A Phase Variable Approach for Improved Rhythmic and Non-Rhythmic Control of a Powered Knee-Ankle Prosthesis

A Phase Variable Approach for Improved Rhythmic and Non-Rhythmic Control of a Powered Knee-Ankle Prosthesis

A Real-Time Gait Event Detection for Lower Limb Prosthesis Control and Evaluation

Evolution of vaulting strategy during locomotion of individuals with transfemoral amputation on slopes and cross-slopes compared to level walking

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