What is a feature of the Skin fit suction system for TF prosthetics?

The skin fit suction system for transfemoral (TF) prosthetics is characterized by its use of a pull sock and an expulsion valve, which are essential components in achieving a secure and comfortable fit. The pull sock is used to aid in donning the prosthesis, while the expulsion valve allows air to escape during the fitting process, ensuring that the socket adheres closely to the skin and creates a vacuum effect. This vacuum helps to stabilize the prosthesis on the residual limb, allowing for better control and movement.

The combination of the pull sock and the expulsion valve effectively reduces the space between the prosthesis and the skin, minimizing chances of slippage and enhancing overall user experience. This feature is particularly important because it contributes to improved proprioception and overall performance of the prosthesis, allowing users to feel more connected to their movements. This differs from options that discuss requirements around volume fluctuation or positional restrictions during donning, which do not accurately describe the primary function of this system.