A Comparison of Energy Expenditure in People With Transfemoral Amputation Using Microprocessor and Nonmicroprocessor Knee Prostheses: A Systematic Review

Wong, Christopher K. PT, PhD, OCS; Benoy, Stephany BS; Blackwell, Wren BS; Jones, Sarah BA; Rahal, Rana BS

JPO Journal of Prosthetics & Orthotics: October 2012 - Volume 24 - Issue 4 - p 202–208
doi: 10.1097/JPO.0b013e31826f5e51
Original Research Article

ABSTRACT: Microprocessor knee (MPK) prostheses have been shown to reduce energy expenditure at different gait speeds in a number of studies. However, the few comparisons between the use of non-MPK and MPK prostheses from multiple manufacturers limits the understanding of MPK prostheses as a type of prosthesis. This systematic review examined studies comparing energy expenditure in users of non-MPK and MPK prostheses. After potential studies were identified, screened, and assessed for eligibility, seven studies involving MPK prostheses from three manufacturers were selected for quality and bias assessment. A pattern of energy reduction with the use of a microprocessor compared with non-MPK prostheses emerged from the reviewed studies, although conclusions must be made with caution because of low study quality.

Microprocessor knee (MPK) prostheses have been shown to reduce energy expenditure at different gait speeds in a number of studies. However, the few comparisons between the use of non-microprocessor and microprocessor knees from multiple manufacturers limits understanding of microprocessor knee prostheses as a type of prosthesis. This systematic review examines studies comparing energy expenditure in users of non-microprocessor and microprocessor knee prostheses.

CHRISTOPHER K. WONG, PT, PHD, OCS is affiliated with Columbia University, New York, New York. STEPHANY BENOY, BS, WREN BLACKWELL, BS, SARAH JONES, BA, and RANA RAHAL, BS are affiliated with the Physical Therapy Program, Columbia University, New York, New York.

Disclosures: The authors declare no conflict of interest.

Correspondence to: Christopher K. Wong, PT, PhD, OCS, Columbia University Medical Center, Program in Physical Therapy, 710 West 168th Street, NI-8, New York, NY 10032; e-mail: ckw7@columbia.edu

© 2012 American Academy of Orthotists & Prosthetists