Journal of Rehabilitation Research & Development (JRRD)

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Volume 53 Number 6, 2016
   Pages 753 — 766

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

CPT M. Jason Highsmith, PhD, DPT, CP(USAR);1–2* Jason T. Kahle, MSMS, CPO;1 Rebecca M. Miro, PhD;1 M. Elaine Cress, PhD;3 Derek J. Lura, PhD;4 CDR William S. Quillen, PhD, DPT (USN Ret);1 Stephanie L. Carey, PhD;5 Rajiv V. Dubey, PhD;5 Larry J. Mengelkoch, PhD, PT6

1School of Physical Therapy and Rehabilitation Sciences, University of South Florida, Tampa, FL; 2Department of ??Veterans Affairs and Department of Defense Extremity Trauma & Amputation Center of Excellence, Washington, DC; 3Department of Kinesiology, University of Georgia, Athens, GA; 4Departments of Bioengineering and Software Engineering, Florida Gulf Coast University, Fort Myers, FL; 5Mechanical Engineering Department, University of South Florida, Tampa, FL; 6University of St. Augustine for Health Sciences, St. Augustine, FL

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 </= 0.05) compared with the C-Leg. Only in the endurance domain did Genium users score significantly lower than nonamputees (22.4%, p = 0.05). Comparing the C-Leg with nonamputees, CS-PFP10 total (2.0%–24.4%, p = 0.03) and all domains except upper-body strength were lower than nonamputees (–13.4% to –28.9%, p </= 0.05). Nonetheless, regardless of knee condition, subjects with TFAs did not equal or surpass nonamputees in any functional domain, suggesting room for improvements in TFA functional performance.

Key words: activities of daily living, balance, endurance, flexibility, lower-limb amputation, microprocessor prosthetic knee, physical assessment, physical therapy, rehabilitation, strength.


View HTML ¦ View PDF ¦ Contents Vol. 53, No. 6
This article and any supplementary material should be cited as follows:
Highsmith MJ, Kahle JT, Miro RM, Cress ME, Lura DJ, Quillen WS, Carey SL, Dubey RV, Mengelkoch LJ. Functional performance differences between the Genium and C-Leg prosthetic knees and intact knees. J Rehabil Res Dev. 2016;53(6):753–66.
http://dx.doi.org/10.1682/JRRD.2014.06.0149
ResearcherID: Derek J. Lura, PhD: E-8210-2011
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