Kinetic asymmetry in transfemoral amputees while performing sit to stand and stand to sit movements

Highsmith, M. Jason; Kahle, Jason T.; Carey, Stephanie L.; Lura, Derek J.; Dubey, Rajiv; Csavina, Kristine R.; Quillen, William S.

doi:10.1016/j.gaitpost.2011.03.018

Cited by 71 publications

(64 citation statements)

References 12 publications

(20 reference statements)

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“…The kinematics and kinetics analyses of stand-to-sit-tostand carried out in this paper will help evaluate the differences between the population of the healthy and the disabled persons. The results are consistent with those obtained in the past by other authors [14,15]. Furthermore, Yoshioka et al (2007) [15] found the minimum peak joint moment at which people are able to stand up from a chair.…”

Section: Determination Of the Phases In The Stand-to-sit-to-stand Tasksupporting

confidence: 92%

A new method of determination of phases and symmetry in stand-to-sit-to-stand movement

Błażkiewicz¹,

Wiszomirska²,

Wit³

2014

International Journal of Occupational Medicine and Environmental Health

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Objectives: Determination of the phases in a stand-to-sit-to-stand task based on a derivative of the parameter with the lowest variance calculated based on the modified symmetry index. Material and Methods: The study group comprised 11 healthy women and 11 healthy men from the University of Physical Education in Warsaw. The examination of the kinematic and kinetic parameters of sitting down and standing up from a chair was carried out using the Vicon Mx system and Kistler force platforms. Results: The modified symmetry index was employed to select the parameters used to choose those with the lowest variance. Consequently, the phases in a stand-to-sit-to-stand task were determined. Conclusions: It was demonstrated that the task of sitting down is a reverse task with respect to standing up in terms of the symmetry of the parameters analyzed.

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Section: Determination Of the Phases In The Stand-to-sit-to-stand Tasksupporting

confidence: 92%

A new method of determination of phases and symmetry in stand-to-sit-to-stand movement

Błażkiewicz¹,

Wiszomirska²,

Wit³

2014

International Journal of Occupational Medicine and Environmental Health

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“…Another study assessed stair ascent using the Ottobock X2 MPK compared with NMPKs [29]. The X2 and Genium are comparable regarding stair gait function, using flexion/extension resistance timing to maximize user climbing ability with their own strength as opposed to systems offering external-powered assistance [8,[29][30]. Persons with TFA used a reciprocal stepping strategy with the X2, necessitating greater hip power, corroborating Bellman et al's findings [8,29].…”

Section: Discussionmentioning

confidence: 53%

Functional performance differences between the Genium and C-Leg prosthetic knees and intact knees

et al. 2016

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Abstract-Microprocessor prosthetic knees (MPKs) have advanced technologically, offering new features to decrease impairment and activity limitations for persons with transfemoral amputation (TFA). The Genium knee is functionally untested, and functional differences between it and intact knees are unknown. This study sought to determine whether Genium use improves functional performance compared with the C-Leg. A randomized experimental crossover design was used, with a cross-section of five nonamputee controls for comparison to normal. Twenty community-ambulating persons with TFA were trained and tested for accommodation with study components. All subjects (n = 25) were assessed using the Continuous-Scale Physical Functional Performance-10 (CS-PFP10) assessment. Subjects with TFA used both MPK systems. Genium use improved upper-body flexibility, balance, and endurance domain scores (7.0%-8.4%, p

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“…A key limitation to the existing adaptive knee literature is that the majority of findings to date have been based on a single model (i.e., Ottobock C-Leg) (Ottobock; Duderstadt, Germany) that uses a specific microprocessorcontrolled hydraulic control system [37]. Other adaptive or active knee technologies, such as the MR system present in the Össur Rheo Knee II (Össur hf; Reykjavík, Iceland), or the harmonic drive system present in the Össur Power Knee have not been well studied, with a few notable exceptions [39,[47][48][49][50][51]. These prior studies have primarily focused on evaluation of laboratory-based biomechanical outcomes (e.g., kinetics and kinematics) and have not directly evaluated users' functional outcomes over longer periods.…”

Section: Introductionmentioning

confidence: 99%

Physical performance and self-report outcomes associated with use of passive, adaptive, and active prosthetic knees in persons with unilateral, transfemoral amputation: Randomized crossover trial

Hafner¹,

Askew²

2015

J Rehabil Res Dev

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Abstract-Prosthetic knees are a vital component in an artificial limb. Contemporary knees include passive (mechanical), adaptive (computerized), or active (motorized) control systems and have the potential to mitigate amputation-related functional impairments and activity limitations. A 14 mo randomized crossover trial was conducted. Participants (n = 12, mean age = 58 yr) were tested under three conditions: passive control (existing knee), adaptive control (Ossur Rheo Knee II), and active control (Ossur Power Knee II). Training and acclimation time were provided to participants in the adaptive and active knees. Outcome measures included indoor tests (Timed Up and Go test [TUG], stairs, and ramp), outdoor tests (walking course and perceived exertion), step activity monitor, self-report surveys (mobility, balance confidence, physical function, fatigue, and general health), and fall incidence. Mixed-effects linear regression modeling was used to evaluate data. Compared with passive control, adaptive control significantly improved comfortable TUG time (difference = 0.91 s, p = 0.001) and reported physical function (difference = 1.26 [T-score], p = 0.03). Active control significantly increased comfortable TUG, fast TUG, and ramp times (difference = 3.02, 2.66, and 0.96 s, respectively, all p < 0.03) and increased balance confidence (difference = 3.77, p = 0.003) compared with passive control. Findings suggest that adaptive knee control may enhance function compared with passive control but that active control can restrict mobility in middle-age or older users with transfemoral amputation.

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Kinetic asymmetry in transfemoral amputees while performing sit to stand and stand to sit movements

Cited by 71 publications

References 12 publications

A new method of determination of phases and symmetry in stand-to-sit-to-stand movement

A new method of determination of phases and symmetry in stand-to-sit-to-stand movement

Functional performance differences between the Genium and C-Leg prosthetic knees and intact knees

Physical performance and self-report outcomes associated with use of passive, adaptive, and active prosthetic knees in persons with unilateral, transfemoral amputation: Randomized crossover trial

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