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The Compas™ technology, Computerized Prosthesis Alignment System, is based on direct measurement of the socket reactions, or torques, using an instrument attached near the base of the socket. Our research has measured exactly how the socket reactions change with alignment alterations. We have assembled a database of over seven million data points collected from dozens of amputees who each walked with at least 26 precisely controlled alignment settings.That’s equal to over nine miles of continuous alignment trials!
The primary theory of Compas™ is that prosthetists and amputees would align the prosthesis in a consistent way if they could, based on observed performance and sensations. Both the performance and the feeling it creates are directly related to the dynamic torques generated at the socket level. We have used a database approach with our considerable data set to statistically determine exactly how socket reactions are related to alignment. From this we have created an advanced computer model that predicts whether and how a prosthesis is misaligned by measuring the socket reactions while walking. Compas™ hardware and software work together automatically so that prosthetists can easily and intuitively harness the power of our computer model. The system is designed for everyday use by clinical prosthetists without need for supporting engineers, technicians or special laboratories.
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