What is the efficiency requirement for the TR cable system?

The efficiency requirement for the TR (Total Resistance) cable system being set at 70% is significant because it establishes a standard for the performance and reliability of prosthetic devices using this system. An efficiency of 70% indicates that the system should convert 70% of the energy used in the prosthetic into effective mechanical work, which is critical for optimal function.

This level of efficiency ensures that there is enough power transmitted through the system to allow for realistic movements and the performance needed in daily activities for the user. Meeting or exceeding this efficiency requirement can also enhance the durability of the components and provide a smoother and more responsive experience for the amputee.

Higher efficiency levels, while desirable for performance, may not be as feasible or cost-effective in the design and manufacturing of prosthetic systems. This specific benchmark reflects a balance of performance, cost, and reliability that aligns with the needs of users and the practical considerations in prosthetic technology. Lower efficiency levels would negatively impact the functionality and user satisfaction with the prosthetic device.