Using a microprocessor knee (C-Leg) with appropriate foot transitioned individuals with dysvascular transfemoral amputations to higher performance levels: a longitudinal randomized clinical trial.

Only 10 participants were recruited from a convenience sample, so the findings are small and may not apply to all dysvascular or diabetic transfemoral amputees. The stated primary outcome was a GPS-based metric, but the supplied text does not report its result. The study compared each intervention with baseline; it did not directly compare the microprocessor knee with the existing non-microprocessor knee. Participants changed foot and received training in both blocks, so the effect of the C-Leg knee alone cannot be separated from the 1M10 foot and acclimation training. The sample was younger than the typical U.S. population with vascular transfemoral amputation (mean age 63 years vs typical 70 to 75 years). Some balance and endurance outcomes did not improve, and the paper says the study may have been underpowered for those clinical outcomes. Home use of assistive devices was not documented, and participants could use canes, walkers, or crutches as needed. No washout period was used between the two randomized blocks.

The funder named is Ottobock, which makes the C-Leg microprocessor knee; the supplied text does not provide a fuller disclosure list.

Do not conclude that the C-Leg microprocessor knee alone caused the improvements. The knee was used together with a standardized 1M10 foot and structured training, and the paper did not statistically compare the C-Leg directly with the participants' existing knee. With only 10 participants and no reported primary GPS result, this is not proof that the knee alone changes function.