First-order model for the analysis of stump stresses for below-knee amputees.
This study extends what had been a purely numerical model that used influence-factor matrices to relate the stump stresses to prosthesis loads for unilateral, below/knee amputees. Previously published influence-factor matrices are now factored into a coefficient matrix times the inverse of a stump geometry matrix. Using actual stump parameters, new information is learned about how the resistive moment of the stump balances the flexion-extension moment of the prosthesis and why certain normal stresses reach a maximum during a specific portion of the stance phase of the prosthesis.
Winarski
D J
DJ
IBM Corporation, General Products Division, Tucson, Ariz. 85744.
Pearson
J R
JR
D000672:Amputation Stumps / Q000503:physiopathology*; D001186:Artificial Limbs; D006801:Humans; D007866:Leg; D008954:Models, Biological; D013314:Stress, Mechanical