Vacuum level effects on knee contact force for unilateral transtibial amputees with elevated vacuum suspension

Xu, Hang; Greenland, Kasey; Bloswick, Donald S.; Zhao, Jie

doi:10.1016/j.jbiomech.2017.04.013

Cited by 3 publications

(2 citation statements)

References 40 publications

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“…In contrast, the opto-reflective marker sets utilized for validation studies have typically used the Plug in Gait (PiG) (Vicon Peak ® , Oxford, UK) marker set [9,10]. The PiG is a widely utilized marker set in both able-bodied motion analysis [11,12], as well as prosthesis wearer scholarship [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

A Comparison of the Conventional PiG Marker Method Versus a Cluster-Based Model when recording Gait Kinematics in Trans-Tibial Prosthesis Users and the Implications for Future IMU Gait Analysis

Samala

Rowe

Rattanakoch

et al. 2020

Sensors

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Validation testing is a necessary step for inertial measurement unit (IMU) motion analysis for research and clinical use. Optical tracking systems utilize marker models which must be precise in measurement and mitigate skin artifacts. Prosthesis wearers present challenges to optical tracking marker model choice. Seven participants were recruited and underwent simultaneous motion capture from two marker sets; Plug in Gait (PiG) and the Strathclyde Cluster Model (SCM). Variability of joint kinematics within and between subjects was evaluated. Variability was higher for PiG than SCM for all parameters. The within-subjects variability as reported by the average standard deviation (SD), was below 5.6° for all rotations of the hip on the prosthesis side for all participants for both methods, with an average of 2.1° for PiG and 2.5° for SCM. Statistically significant differences in joint parameters caused by a change in the protocol were evident in the sagittal plane (p < 0.05) on the amputated side. Trans-tibial gait analysis was best achieved by use of the SCM. The SCM protocol appeared to provide kinematic measurements with a smaller variability than that of the PiG. Validation studies for prosthesis wearer populations must reconsider the marker protocol for gold standard comparisons with IMUs.

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Section: Introductionmentioning

confidence: 99%

A Comparison of the Conventional PiG Marker Method Versus a Cluster-Based Model when recording Gait Kinematics in Trans-Tibial Prosthesis Users and the Implications for Future IMU Gait Analysis

Samala

Rowe

Rattanakoch

et al. 2020

Sensors

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show abstract

“…Therefore, providing a suitable model of human amputee movement is very useful and helpful. In one research [41], in order to modeling of the movement of an amputee with a passive below knee prosthesis, OpenSim software was used to investigate the effect of using springs and dampers in the ankle joint of the prosthesis on the forces acting on the knee of the amputated leg. In this model, in order to simulate the amputee gait with passive prosthesis, the muscles of the amputated leg have been removed and the mass and inertia characteristics of the remaining bone links have been set to be similar to the prosthesis.…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of active transtibial prosthesis function using 7-link inverse dynamic model of gait

2023

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In today’s world, in order to increase the movement abilities of amputees, different types of passive prostheses are used according to the level of the person’s disability. Although these types of prostheses increase a person’s mobility; however, they still have a limited ability to help the amputee walk normally on uneven terrain, as there is no net stimulus input power for the target joint. These limitations have led to the growth of the use of active prostheses in recent years, which has led to a variety of prosthetic designs. The purpose of this research is, first of all, to provide a suitable design and control of active transtibial prosthesis close to the performance of lost limb of a healthy person, and second and more importantly, to develop a 7-link inverse dynamic model of human gait and use it to analyze of an amputee gait with the designed prosthesis. Winter’s reference data are used in the entire process of design and simulation of prosthesis performance. Also, it is assumed that the amputation occurred in only one leg of the person. Based on the obtained results, when an amputee with 57 kg weight and 1.55 cm height wears an active prosthesis designed with 0.5 kg extra weight, the amount of metabolic cost of amputee in the swing phase increases by about 20%. By using this obtained model, it will be possible to optimize different prosthesis designs for people with different weight and height conditions.

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Musculoskeletal Health After Blast Injury

Silverman

Hendershot²,

McGregor³

2022

Blast Injury Science and Engineering

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Vacuum level effects on knee contact force for unilateral transtibial amputees with elevated vacuum suspension

Cited by 3 publications

References 40 publications

A Comparison of the Conventional PiG Marker Method Versus a Cluster-Based Model when recording Gait Kinematics in Trans-Tibial Prosthesis Users and the Implications for Future IMU Gait Analysis

A Comparison of the Conventional PiG Marker Method Versus a Cluster-Based Model when recording Gait Kinematics in Trans-Tibial Prosthesis Users and the Implications for Future IMU Gait Analysis

Design and analysis of active transtibial prosthesis function using 7-link inverse dynamic model of gait

Musculoskeletal Health After Blast Injury

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