What type of prosthetic knee uses fluid resistance to manage transtibial swing?

The hydraulic single axis knee is designed to utilize fluid resistance to control the movement during the swing phase of gait for transtibial amputees. This functionality is crucial for creating a more normalized and efficient motion. Hydraulic systems adjust the resistance according to the speed and force applied, allowing for a more adaptable response to various activities and walking speeds.

In a hydraulic knee, the fluid dynamics provide a smoother transition that mimics natural knee movement. As a result, users can achieve greater stability and control during ambulation, particularly when navigating different terrains or changes in pace. The presence of fluid also helps dampen the motion, which can reduce jarring impacts on the residual limb.

Other types of knees, such as the single axis knee, do not incorporate hydraulic functionality and typically rely on simple mechanical systems that offer limited adjustability and responsiveness. Polycentric knees, while having more stability and adaptability compared to single axis knees, do not use fluid resistance in their design. Mechanical knees generally refer to those that operate through purely mechanical means without hydraulic assistance, thus falling short in managing dynamic swing effectively.

In the context of advanced prosthetic options, the hydraulic single axis knee stands out for its ability to enhance user comfort and mobility through adaptive fluid resistance.