The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Hugh Herr - One of the best experts on this subject based on the ideXlab platform.
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Antagonistic active Knee Prosthesis. A metabolic cost of walking comparison with a variable-damping prosthetic Knee
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011Co-Authors: Ernesto C. Martinez-villalpando, Luke Mooney, Grant Elliott, Hugh HerrAbstract:This paper examines the impact of a biomimetic active Knee Prosthesis on the metabolic costs associated with a unilateral transfemoral amputee walking at self selected speed. In this study we compare the antagonistic active Knee Prosthesis developed at MIT to an electronically controlled, variable-damping commercial Knee Prosthesis, the Otto Bock C-leg. Use of the active Knee Prosthesis resulted in both, a 17% increase in an amputee's average self selected walking speed from 1.12 m/s to 1.31 m/s, and a 6.8% reduction in metabolic cost. The results of this study suggest that an agonist-antagonist active Knee Prosthesis design with variable impedance control can offer walking energetic advantages over commercially available systems.
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Design of an agonist-antagonist active Knee Prosthesis
2008 2nd IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics, 2008Co-Authors: Ernesto Martinez- C. Villalpando, Grant Elliott, Jeff Weber, Hugh HerrAbstract:The majority of commercial prosthetic Knees are passive in nature and therefore cannot replicate the positive mechanical work exhibited by the natural human Knee in early and late stance. In contrast to traditional purely dissipative prosthetic Knees, we propose a biomimetic active agonist-antagonist structure designed to reproduce both positive and negative work phases of the natural joint while using series elasticity to minimize net energy consumption. We present the design and physical implementation of the active Knee Prosthesis prototype.
Grant Elliott - One of the best experts on this subject based on the ideXlab platform.
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EMBC - Antagonistic active Knee Prosthesis. A metabolic cost of walking comparison with a variable-damping prosthetic Knee
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and, 2011Co-Authors: Ernesto C. Martinez-villalpando, Grant Elliott, Luke M. Mooney, Hugh M. HerrAbstract:This paper examines the impact of a biomimetic active Knee Prosthesis on the metabolic costs associated with a unilateral transfemoral amputee walking at self selected speed. In this study we compare the antagonistic active Knee Prosthesis developed at MIT to an electronically controlled, variable-damping commercial Knee Prosthesis, the Otto Bock C-leg. Use of the active Knee Prosthesis resulted in both, a 17% increase in an amputee's average self selected walking speed from 1.12 m/s to 1.31 m/s, and a 6.8% reduction in metabolic cost. The results of this study suggest that an agonist-antagonist active Knee Prosthesis design with variable impedance control can offer walking energetic advantages over commercially available systems.
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Antagonistic active Knee Prosthesis. A metabolic cost of walking comparison with a variable-damping prosthetic Knee
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011Co-Authors: Ernesto C. Martinez-villalpando, Luke Mooney, Grant Elliott, Hugh HerrAbstract:This paper examines the impact of a biomimetic active Knee Prosthesis on the metabolic costs associated with a unilateral transfemoral amputee walking at self selected speed. In this study we compare the antagonistic active Knee Prosthesis developed at MIT to an electronically controlled, variable-damping commercial Knee Prosthesis, the Otto Bock C-leg. Use of the active Knee Prosthesis resulted in both, a 17% increase in an amputee's average self selected walking speed from 1.12 m/s to 1.31 m/s, and a 6.8% reduction in metabolic cost. The results of this study suggest that an agonist-antagonist active Knee Prosthesis design with variable impedance control can offer walking energetic advantages over commercially available systems.
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Design of an agonist-antagonist active Knee Prosthesis
2008 2nd IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics, 2008Co-Authors: Ernesto Martinez- C. Villalpando, Grant Elliott, Jeff Weber, Hugh HerrAbstract:The majority of commercial prosthetic Knees are passive in nature and therefore cannot replicate the positive mechanical work exhibited by the natural human Knee in early and late stance. In contrast to traditional purely dissipative prosthetic Knees, we propose a biomimetic active agonist-antagonist structure designed to reproduce both positive and negative work phases of the natural joint while using series elasticity to minimize net energy consumption. We present the design and physical implementation of the active Knee Prosthesis prototype.
Ernesto C. Martinez-villalpando - One of the best experts on this subject based on the ideXlab platform.
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EMBC - Antagonistic active Knee Prosthesis. A metabolic cost of walking comparison with a variable-damping prosthetic Knee
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and, 2011Co-Authors: Ernesto C. Martinez-villalpando, Grant Elliott, Luke M. Mooney, Hugh M. HerrAbstract:This paper examines the impact of a biomimetic active Knee Prosthesis on the metabolic costs associated with a unilateral transfemoral amputee walking at self selected speed. In this study we compare the antagonistic active Knee Prosthesis developed at MIT to an electronically controlled, variable-damping commercial Knee Prosthesis, the Otto Bock C-leg. Use of the active Knee Prosthesis resulted in both, a 17% increase in an amputee's average self selected walking speed from 1.12 m/s to 1.31 m/s, and a 6.8% reduction in metabolic cost. The results of this study suggest that an agonist-antagonist active Knee Prosthesis design with variable impedance control can offer walking energetic advantages over commercially available systems.
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Antagonistic active Knee Prosthesis. A metabolic cost of walking comparison with a variable-damping prosthetic Knee
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011Co-Authors: Ernesto C. Martinez-villalpando, Luke Mooney, Grant Elliott, Hugh HerrAbstract:This paper examines the impact of a biomimetic active Knee Prosthesis on the metabolic costs associated with a unilateral transfemoral amputee walking at self selected speed. In this study we compare the antagonistic active Knee Prosthesis developed at MIT to an electronically controlled, variable-damping commercial Knee Prosthesis, the Otto Bock C-leg. Use of the active Knee Prosthesis resulted in both, a 17% increase in an amputee's average self selected walking speed from 1.12 m/s to 1.31 m/s, and a 6.8% reduction in metabolic cost. The results of this study suggest that an agonist-antagonist active Knee Prosthesis design with variable impedance control can offer walking energetic advantages over commercially available systems.
Rene Verdonk - One of the best experts on this subject based on the ideXlab platform.
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the oxford unicompartmental Knee Prosthesis an independent 10 year survival analysis
Knee Surgery Sports Traumatology Arthroscopy, 2006Co-Authors: P Vorlat, Guy Putzeys, Dominique Cottenie, Tom Van Isacker, Nicole Pouliart, F Handelberg, P P Casteleyn, Filip Gheysen, Rene VerdonkAbstract:One hundred forty-nine medial prostheses were implanted in 140 patients between 1988 and 1996. After a mean of 67 months 28 patients had died, without the need for revision. Seventeen prostheses were lost to follow-up. Revision surgery using a total Knee Prosthesis was performed in 16 cases. In four others, a lateral Prosthesis was implanted subsequently to a medial one. One of these four was revised to a total Knee Prosthesis 6 years later. In another four cases, late complications of the meniscal bearing were treated with replacement of this bearing. The surviving prostheses were seen back after a mean of 126 months. The cumulative survival rate at 10 years was 82% for the whole population and 84% when Knees with a previous high tibial osteotomy were excluded. Since these results compare poorly to the survival of total Knee arthroplasty, this Prosthesis is not the first-choice implant. Because it preserves a maximum of bone stock and is revised to a total Prosthesis almost without difficulty, it is the first-choice implant for medial unicompartmental osteoarthritis in patients younger than 65. Further research is mandatory to confirm that this Prosthesis very rarely needs revision in patients older than 75. It should not be used in osteotomized Knees.
Luke Mooney - One of the best experts on this subject based on the ideXlab platform.
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Antagonistic active Knee Prosthesis. A metabolic cost of walking comparison with a variable-damping prosthetic Knee
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011Co-Authors: Ernesto C. Martinez-villalpando, Luke Mooney, Grant Elliott, Hugh HerrAbstract:This paper examines the impact of a biomimetic active Knee Prosthesis on the metabolic costs associated with a unilateral transfemoral amputee walking at self selected speed. In this study we compare the antagonistic active Knee Prosthesis developed at MIT to an electronically controlled, variable-damping commercial Knee Prosthesis, the Otto Bock C-leg. Use of the active Knee Prosthesis resulted in both, a 17% increase in an amputee's average self selected walking speed from 1.12 m/s to 1.31 m/s, and a 6.8% reduction in metabolic cost. The results of this study suggest that an agonist-antagonist active Knee Prosthesis design with variable impedance control can offer walking energetic advantages over commercially available systems.