IIT-Ropar develops affordable, mechanical knee rehab machine

Researchers at the Indian Institute of Technology (IIT), Ropar, have developed an innovative solution to make post-surgery therapy for knee disorders more accessible and affordable.

Termed as Completely Mechanical Passive Motion Machine for Knee Rehabilitation, it has been awarded a patent.

Unlike traditional machines used for continuous passive motion (CPM) therapy, which are expensive and depend on electricity, the newly developed device is entirely mechanical. It utilises a piston and pulley system that stores air when the user pulls a handle, enabling smooth and controlled motion to aid in knee rehabilitation.

“This device has the potential to revolutionize knee rehabilitation in India, where access to advanced medical technology can be limited, particularly in rural areas,” said lead researcher Dr Abhishek Tiwari.

“It’s designed to be a low-cost, sustainable solution that not only aids in recovery but also helps reduce the environmental impact associated with motorised devices,” he added. Its simple design eliminates the need for electricity, batteries or motors, making it both lightweight and portable.

The mechanical CPM machine offers a promising alternative to costly electric machines that are often out of reach for many patients, especially in rural areas with unreliable electricity supply. By reducing the reliance on electricity, it makes continuous passive motion therapy feasible even in off-grid locations.

According to the researchers, continuous passive motion is an important therapy for patients who have undergone knee surgeries, helping to improve joint mobility, reduce stiffness and speed up the recovery process. It also allows patients to use it in the comfort of their homes, reducing the need for prolonged hospital stays and rehabilitation visits.