Dual-Ankle Springs Multi-Axial Rotation System (D.A.S., M.A.R.S)
JEROME P. VOISIN, C.P.
The Dual-Ankle Springs (D.A.S.) Multi-Axial Rotation System (M.A.R.S.) is composed of anterior and posterior rubber compression springs. These springs are rigidly attached to proximal and distal attachment plates. Around these plates there are anterior and posterior compression bands encompassing corresponding rubber springs.
The D.A.S. M.A.R.S. unit was developed as a continuation of the D.A.S. foot ankle system using helical springs. The rubber springs were used as a substitute for the helical springs in the pediatric version both to decrease weight and to accomodate the smaller dimensional limitations. After this was achieved, larger M.A.R.S. units were developed for children and adults.
The leaf spring device within existing stored energy feet does not allow for inversion, eversion, and shear. When the D.A.S. M.A.R.S. unit is used either within a symes typed stored energy leaf spring foot, or symes type S.A.C.H. foot the function of the prosthetic foot is enhanced.
Acadian Prosthetics & Orthopedic Aids, Inc., 145 Agnes Street, Houma, Louisiana 70363