Energy Expenditure and Activity of Transfemoral Amputees Using Mechanical and Microprocessor-Controlled Prosthetic Knees Kenton R. Kaufman, PhD, PE,

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Energy Expenditure and Activity of Transfemoral Amputees Using Mechanical and Microprocessor-Controlled Prosthetic Knees Kenton R. Kaufman, PhD, PE, James A. Levine, MD, PhD, Robert H. Brey, PhD, Shelly K. McCrady, MS, Denny J. Padgett, PT, Michael J. Joyner, MD Archives of Physical Medicine and Rehabilitation Volume 89, Issue 7, Pages 1380-1385 (July 2008) DOI: 10.1016/j.apmr.2007.11.053 Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig 1 (A) Energy efficiency. (B) Rating of perceived exertion while walking at 3 speeds. There was a nonsignificant (P=.34) improvement in energy efficiency when using the microprocessor-controlled knee. The subject's perception was that it was easier to walk with the microprocessor-controlled knee (P=.002). Error bars are the SDs of the data. Abbreviation: RPE, rating of perceived exertion. Archives of Physical Medicine and Rehabilitation 2008 89, 1380-1385DOI: (10.1016/j.apmr.2007.11.053) Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig 2 TDEE using the mechanical prosthesis (SNS) compared with the microprocessor-controlled knee (C-Leg). The TDEE was partitioned into the BMR, TEF, and PAEE. The PAEE was significantly higher when using the microprocessor-controlled prosthesis (P=.04). Error bars are the SDs of the data. Archives of Physical Medicine and Rehabilitation 2008 89, 1380-1385DOI: (10.1016/j.apmr.2007.11.053) Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig 3 Results of the condition-specific PEQ used to quantify patient satisfaction for the mechanical prosthesis (SNS) and the microprocessor-controlled knee (C-Leg). The microprocessor-controlled knee rated significantly better than the mechanical prosthesis (P=.02). Abbreviations: AM, ambulation; AP, appearance; FR, frustration; PR, perceived response; RL, residual limb health; SB, social burden; SO, sounds; UT, utility; WB, well-being. Error bars are the SDs of the data. Archives of Physical Medicine and Rehabilitation 2008 89, 1380-1385DOI: (10.1016/j.apmr.2007.11.053) Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions