Kinetic differences between level walking and ramp descent in individuals with unilateral transfemoral amputation using a prosthetic knee without a stance control mechanism

Okita, Yusuke; Yamasaki, Naohito; Nakamura, Takashi; Kubo, Toru; Mitsumoto, Atsuko; Akune, Toru

doi:10.1016/j.gaitpost.2018.04.043

Cited by 7 publications

(4 citation statements)

References 22 publications

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“…Okita et al, 2018 compared the vertical, anterior-posterior, and medial-lateral components of GRFs between level ground walking and downhill slope walking. They found that maximum anterior and medial GRF of prosthetic limb during downhill slope walking was greater than level ground walking 25) . Further, the maximum medial GRF of the intact limb during downhill slope was greater than level ground 25) .…”

Section: Ground Reaction Forcesmentioning

confidence: 98%

“…They found that maximum anterior and medial GRF of prosthetic limb during downhill slope walking was greater than level ground walking 25) . Further, the maximum medial GRF of the intact limb during downhill slope was greater than level ground 25) . This may be due to the different vector control of GRF between these two conditions in TFPUs and suggest an increased demand on the mediallateral balance control during downhill slope walking.…”

Section: Ground Reaction Forcesmentioning

confidence: 98%

“…The vertical ground reaction force (GRF) during downhill slope walking were reported in 6 studies 13,15,22,24,25,29) 13,15,24) . Bell et al, 2016 also found that maximum vertical GRFs during 0-30% and 35-75% of gait cycle in the intact and prosthetic limbs were not significantly different between conventional knees and Genium X2 22) .…”

Section: Ground Reaction Forcesmentioning

confidence: 99%

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Slope walking in unilateral transfemoral prosthesis users: A narrative review

Genki

2022

sobim

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Currently, lower limb loss is considered as a serious bodily impairment that can limit an individual's functional mobility. The ability to negotiate slopes is an important factor for functional independence in daily activity after lower limb amputation. Slope walking is affected by loss of biological knee and ankle in transfemoral prosthesis users (TFPUs). A better understanding of gait biomechanics during slope walking is expected to aid in the development of design parameters for prosthetic devices and effective gait rehabilitation. This article describes the current knowledge with respect to the biomechanical research during slope walking in TFPUs.

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Section: Ground Reaction Forcesmentioning

confidence: 98%

Section: Ground Reaction Forcesmentioning

confidence: 98%

Section: Ground Reaction Forcesmentioning

confidence: 99%

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Slope walking in unilateral transfemoral prosthesis users: A narrative review

Genki

2022

sobim

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“…Passive knees are the knee joints that possess constant stiffness or damping properties. A constant stiffness implies that these knee joints cannot adapt to variable walking conditions, and is one of the disadvantages that often results in applying larger forces on the contralateral limb (Okita et al, 2018). Active knees are by far the most advanced knee joints, which can adapt to variable walking conditions and support the prosthesis user by supplying positive energy.…”

Section: Introductionmentioning

confidence: 99%

Design of bypass rotary vane magnetorheological damper for prosthetic knee application

Saini

Chandramohan

Sujatha

et al. 2020

Journal of Intelligent Material Systems and Structures

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Semi-active systems using magnetorheological fluids have been realized in many novel devices such as linear dampers, rotary dampers, brakes, and so on. Rotary vane-type magnetorheological damper is one such device that uses magnetorheological fluid as a hydraulic medium and a controllable magnetorheological valve to generate variable resistance. This device, due to its limited angle motion, lends itself to a natural application for prosthetic knee joint. In this article, a bypass rotary vane-type magnetorheological damper suitable for prosthetic knee device is designed. In the proposed design, the rotary vane chamber and the bypass magnetorheological valve are connected using hydraulic cables and ports. The design of rotary cylinder is implemented based on the largest possible dimensions within the envelope of a healthy human knee, while the magnetorheological valve is designed optimally using a multi-objective genetic algorithm optimization. Off-state braking torque, induced on-state braking torque and mass of the valve are selected as three objectives. The torque and angular velocity requirements of the normal human knee are used as design limits. The optimal solution is chosen from the obtained Pareto fronts by prioritizing the objective of weight reduction of magnetorheological valve. The optimal solution is capable of producing a damping torque of 73 Nm at a design speed of 8.4 rpm and current supply of 1.9 A. Potential benefits offered by this design when compared with multi-plate magnetorheological brake are flow mode operation, large clearance gap, and fewer design components, thus reducing the manufacturing complexity.

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