Prosthesis-user-in-the-loop: User-centered design parameters and visual simulation

Christ, Oliver; Wojtusch, Janis; Beckerle, Philipp; Wolff, Krister; Vogt, Joachim; Stryk, Oskar von; Rinderknecht, Stephan

doi:10.1109/embc.2012.6346331

Cited by 11 publications

(7 citation statements)

References 18 publications

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“…Until now, this is questionnaires to survey the user's requirements in the beginning of the development and for an evaluation of prototypes in clinical evaluations in the end of this process. The Prosthesis-User-in-the-Loop simulator concept proposed by the authors [12,13], aims at supporting user-centered prosthetic design by integrating the users to the development process. Therefore, it provides simulations of the biomechanical behavior of prostheses for the user in several gait scenarios.…”

Section: Resultsmentioning

confidence: 99%

“…UCD can imp the amputees' needs into the prosthesis' properties In this paper, items of a newly developed questionnaire presented with the focus on transfemoral prosthetic users and their satisfaction in daily living. A correlation matrix may demonstrate the acceptance of dissatisfaction extent and the Prosthesis-User-in-the-Loop simulator co cept [12,13] may give ideas to overcome the issues related to non user centered development in the design of a reh bilitation process in lower limb amputees.…”

Section: Introductionmentioning

confidence: 99%

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User-Centered Prosthetic Development: Comprehension of Amputees’ Needs

Christ

Jokisch

Preller

et al. 2012

Biomedical Engineering / Biomedizinische Technik

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The goal of user-centered development (UCD) is an active involvement of the user for a clear understanding of the users' needs. In the context of rehabilitation engineering it is essential to integrate the users' needs into the development methodology. In fact the use or disclaim of assistive device depends on good comfort and satisfaction during application. Especially prostheses are developed to improve amputees' quality of life up to live independently again. UCD can improve integrating the amputees' needs into the prosthesis' properties. For a more detailed view of the prosthesis-users' needs we developed a questionnaire and collected data from patients regarding their needs using lower limb prostheses. 88 items, describing satisfaction, usability, appearance, functionality and handling of the prosthesis in different motor situations, were generated. Among 65 participants, 29 transfemoral amputees and experienced prosthesis users completed the questionnaire. The results indicate a lack of satisfaction with the prosthesis shaft as well as with different motor functions. Furthermore, the majority feels socially restricted and is dissatisfied with their appearance in public. While the latter is significantly negative correlated with feelings of social restriction, problems during changing gait speed are significantly negative correlated with feelings of certainty and stability during spontaneous movements. Although prostheses are developed to help to improve amputees' quality of life, the lack in different motor-and social-issues are noticeable. This indicates that the enhancement of changing gait speed in prostheses may help amputees to feel more certain and natural during walking. From an amputee's point of view, this could be one important predictor for being more satisfied and a first step for being more independent in life in general. With this first step of UCD, important information for the design of prosthesis in future has been generated.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

User-Centered Prosthetic Development: Comprehension of Amputees’ Needs

Christ

Jokisch

Preller

et al. 2012

Biomedical Engineering / Biomedizinische Technik

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“…In order to investigate different types of prostheses, the models in the real time control system can be changed. A holistic illusion of walking with the simulated prosthesis is established by adding a visual simulation unit as proposed in [15] and hiding the components for the biodynamical feedback in a blackbox. The combination of biomechanical and visual simulation should provide the experience of physical integrity for the user while testing the real behaviour of the investigated prosthesis in virtual reality.…”

Section: Simulator Ideamentioning

confidence: 99%

“…The combination of biomechanical and visual simulation should provide the experience of physical integrity for the user while testing the real behaviour of the investigated prosthesis in virtual reality. Hence, the functionality of the prosthesis can be isolated from other possibly correlated factors for an assessment by the user [15]. During the experiments the user is secured in a user safeguarding unit.…”

Section: Simulator Ideamentioning

confidence: 99%

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Conception and Design of a Hardware Simulator for Restoring Lost Biomechanical Function

Beckerle

Lahnstein

Wojtusch

et al. 2013

2013 IEEE International Conference on Systems, Man, and Cybernetics

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Abstract-The Prosthesis-User-in-the-Loop simulator concept represents an approach to integrate users to prosthetic development by a holistic simulation of gait with a prosthesis. It aims at a more user-centered design of lower limb prosthetic devices by utilizing user experience and assessment. As this requires a complex mechanical robot design and sophisticated control strategies that allow for restoring lost biomechanical function, this paper presents the conception and design of a hardware simulator for proof-of-concept studies of those issues. For those investigations, the ankle joints of healthy praticpants are locked mechanically to induce a temporary disability. The task of the simulator is to provide a simulation of physiological gait by artificially restoring ankle functionality. Therefore, the biodynamic behaviour of the locked ankle joint and the enviroment have to be mimicked mechnically. After introducing ProsthesisUser-in-the-Loop simulator idea, the conception of a proof-ofconcept simulator is presented. From this, an analytical model is derived and inverse dynamics simulation are used for design. The resulting mechanism is limited to sagittal plane movements and thus has three degrees of freedom. The actuators are dimensioned to meet the requirements of walking motions in the human subject with maximum body height among the test population.

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Prosthesis satisfaction in lower limb amputees

Baars¹,

Schrier

Dijkstra³

et al. 2018

Medicine

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Background:Factors influencing patient satisfaction with a transtibial prosthesis have been studied fragmentarily. The aims of this systematic review were to review the literature regarding factors of influence on patient satisfaction with a transtibial prosthesis, to report satisfaction scores, to present an overview of questionnaires used to assess satisfaction and examine how these questionnaires operationalize satisfaction.Methods:A literature search was performed in PubMed, Embase, PsycInfo, CINAHL, Cochrane, and Web of Knowledge databases up to February 2018 to identify relevant studies.Results:Twelve of 1832 studies met the inclusion criteria. Sample sizes ranged from 14 to 581 participants, mean age ranged from 18 to 70 years, and time since amputation ranged from 3 to 39 years. Seven questionnaires assessed different aspects of satisfaction. Patient satisfaction was influenced by appearance, properties, fit, and use of the prosthesis, as well as aspects of the residual limb. These influencing factors were not relevant for all amputee patients and were related to gender, etiology, liner use, and level of amputation. No single factor was found to significantly influence satisfaction or dissatisfaction. Significant associations were found between satisfaction and gender, etiology, liner use, and level of amputation.Conclusion:Relevance of certain factors for satisfaction was related to specific amputee patient groups. Questionnaires assessing satisfaction use different operationalizations, making comparisons between studies difficult.

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Prosthesis-user-in-the-loop: User-centered design parameters and visual simulation

Cited by 11 publications

References 18 publications

User-Centered Prosthetic Development: Comprehension of Amputees’ Needs

User-Centered Prosthetic Development: Comprehension of Amputees’ Needs

Conception and Design of a Hardware Simulator for Restoring Lost Biomechanical Function

Prosthesis satisfaction in lower limb amputees

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