Prosthetic intervention effects on activity of lower-extremity amputees. 2006

Glenn K Klute, and Jocelyn S Berge, and Michael S Orendurff, and Rhonda M Williams, and Joseph M Czerniecki
Department of Veterans Affairs Center of Excellence for Limb Loss Prevention and Prosthetic Engineering, and Department of Mechanical Engineering, University of Washington, Seattle, WA 98108, USA. gklute@u.washington.edu

OBJECTIVE To investigate the effect of prosthetic interventions on the functional mobility of lower-extremity amputees. METHODS Crossover with repeated measures. METHODS Household and community environment. METHODS Twelve transtibial and 5 transfemoral amputees. METHODS For transtibial amputees, shock-absorbing versus rigid pylons. For transfemoral amputees, C-Leg versus Mauch SNS knees. METHODS Daily activity level (step count) and duration (minutes of activity). RESULTS Pylon type had no effect on the daily activity level or duration of transtibial amputees. Knee type had no effect on the daily activity level or duration of transfemoral amputees. Transtibial amputees were more active on weekdays (3079+/-1515 steps/d) than weekends (2386+/-1225 steps/d) (P=.007). In general, lower-extremity amputees perform numerous short-duration bouts of activity (1-2 min) consisting of fewer than 17 steps/min, but activities of more than 15 minutes in duration were relatively rare (<1 per day). CONCLUSIONS Intervention had no effect on amputee activity level and duration. Higher weekday activity levels of transtibial amputees suggest their vocational activities are more demanding than recreational activities. The fitting, alignment, and design of prosthetic components should be optimized for 1 to 2 minute bouts of activity consisting of only a few dozen steps.

UI MeSH Term Description Entries
D007720 Knee Prosthesis Replacement for a knee joint. Knee Prostheses,Prostheses, Knee,Prosthesis, Knee
D007866 Leg The inferior part of the lower extremity between the KNEE and the ANKLE. Legs
D008838 Microcomputers Small computers using LSI (large-scale integration) microprocessor chips as the CPU (central processing unit) and semiconductor memories for compact, inexpensive storage of program instructions and data. They are smaller and less expensive than minicomputers and are usually built into a dedicated system where they are optimized for a particular application. "Microprocessor" may refer to just the CPU or the entire microcomputer. Computers, Personal,Microprocessors,Computer, Personal,Microcomputer,Microprocessor,Personal Computer,Personal Computers
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D011474 Prosthesis Design The plan and delineation of prostheses in general or a specific prosthesis. Design, Prosthesis,Designs, Prosthesis,Prosthesis Designs
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000671 Amputation, Surgical The surgical removal of part of, or all of, a limb or other appendage or outgrowth of the body. Amputation,Amputation, Multiple, Surgical,Multiple Amputation, Surgical,Surgical Amputation Procedures,Amputation Procedure, Surgical,Amputation Procedures, Surgical,Amputation, Surgical Multiple,Amputations,Amputations, Surgical,Amputations, Surgical Multiple,Multiple Amputations, Surgical,Procedure, Surgical Amputation,Procedures, Surgical Amputation,Surgical Amputation,Surgical Amputation Procedure,Surgical Amputations,Surgical Multiple Amputation,Surgical Multiple Amputations
D001186 Artificial Limbs Prosthetic replacements for arms, legs, and parts thereof. Arm Prosthesis,Arm, Artificial,Artificial Arm,Artificial Leg,Extremities, Artificial,Leg Prosthesis,Leg, Artificial,Limb Prosthesis,Limbs, Artificial,Arm Prostheses,Arms, Artificial,Artificial Arms,Artificial Extremities,Artificial Extremity,Artificial Legs,Artificial Limb,Extremity, Artificial,Leg Prostheses,Legs, Artificial,Limb Prostheses,Limb, Artificial,Prostheses, Arm,Prostheses, Leg,Prostheses, Limb,Prosthesis, Arm,Prosthesis, Leg,Prosthesis, Limb
D016037 Single-Blind Method A method in which either the observer(s) or the subject(s) is kept ignorant of the group to which the subjects are assigned. Single-Masked Study,Single-Blind Study,Single-Masked Method,Method, Single-Blind,Method, Single-Masked,Methods, Single-Blind,Methods, Single-Masked,Single Blind Method,Single Blind Study,Single Masked Method,Single Masked Study,Single-Blind Methods,Single-Blind Studies,Single-Masked Methods,Single-Masked Studies,Studies, Single-Blind,Studies, Single-Masked,Study, Single-Blind,Study, Single-Masked

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