What could cause uneven heel rise in TF prosthetics?

Uneven heel rise in trans-femoral (TF) prosthetics can indeed be caused by an inadequate extension aid. The extension aid is designed to assist the prosthetic knee in achieving full extension at the heel strike of the gait cycle. If the extension aid is not providing enough support, or if it is improperly adjusted, it can lead to an asymmetrical level of knee extension between the two limbs during walking. This results in uneven heel rise, where one heel will rise more than the other, indicating a lack of proper alignment and mechanical function of the prosthetic knee.

The functioning of the extension aid is crucial for the stability and smooth transition during gait; therefore, ensuring that it is adequately set is instrumental in achieving balanced and even heel rise. Proper adjustment and calibration are essential for optimal performance of the prosthetic limb, especially in ensuring that the user maintains an efficient and natural gait pattern.