Computer simulation for the prediction of stump loading in above-knee amputees

The efficiency and accuracy of prosthetic alignment may be greatly improved with the help of a model which establishes the relationship between alignment settings and physical parameters which are closely related to amputee comfort and performance. The paper presents a mathematical model, based on equations of motion of the shank and foot, relating above-knee amputees' stump loading to alignment adjustments. Included is a numerical example, which demonstrates the use of a computer simulation, to predict the alignment setting for minimal thigh axial torque (t.a.t.). It is suggested that the use of such a simulation should precede actual change of alignment in clinical practice.