All subjects had been fitted with endoskeletal
HD prostheses at our center.
Abbreviations: 6MWT = 6-minute walk test, AMP = Amputee Mobility Predictor, AMPPRO = AMP with a prosthesis, ANOVA = analysis of variance, IRB = institutional review board, LCI = Locomotor Capabilities Index, MFCL = Medicare Functional Classification Level, MPA = microprocessor ankle, PEQ = Prosthesis Evaluation Questionnaire, PEQ-13 = PEQ-Mobility Scale, PVD = peripheral vascular disease, SACH = solid ankle cushion heel, SAFE = stationary attachment flexible endoskeletal
, SAM = step activity monitor, SD = standard deviation, VA = Department of Veterans Affairs.
Inclusion criteria were (1) use of a modular endoskeletal
prosthesis for more than 1 year, (2) bilateral normal range of motion of the lower limb, (3) ability to walk for the period of the alignment perturbation trials, (4) ability to walk without additional assistive devices, (5) ability to communicate individual perceptions, and (6) ability to provide informed consent.
His regular prosthesis was a patellar tendon bearing (PTB) endoskeletal
prosthesis with a gel liner and lock-and-pin suspension, and his prosthesis was equipped with a dynamic response foot (Luxon Max, Otto Bock).
The series of designed mechanical tests described in the Report characterize various aspects of prosthesis mechanical properties for passive feet and pylon endoskeletal
components, such as range of motion in three planes, vertical displacement, and independent heel and keel stiffness and damping.
Lastly, subjects needed to have a well-fitting endoskeletal
prosthesis that could be disassembled and reassembled at the end of the study.
He used a patellar-tendon bearing (PTB) endoskeletal
prosthesis; a composite socket with one layer of Dacron, two layers of Kevlar, and four layers of nylon; a 3 mm Ossur Iceross Comfort liner; and a Seattle LightFoot.