8^th World Physiotherapists and Physicians Summit

Biography

Biography: Shahab Sadeghi

Abstract

Aim: The immediate effect of a novel designed variable pressure knee orthosis on the leg adduction moment in patients with medial compartment knee osteoarthritis was compared with the effect of ordinary constant pressure knee orthosis.

Methodology: Fifty patients (age: 60.9±7.5, 25 female & 15 male) with primary medial knee osteoarthritis were recruited through simple convenient sampling method. A variable pressure knee orthosis was designed including two air cuffs that were connected with a narrow plastic tube. One cuff is mounted in the heel area of the patient 's shoe and the other cuff was fixed on the lateral side of the knee orthosis at the level of knee joint line. The medial directed pressure at the knee joint was variable and related to the amount of vertical load of body weight that was applied to the heel cuff. The vertical distance of foot center of pressure to lateral border of the foot was measured before and after wearing the knee orthosis during single and double stance. A foot scan was used for the measurements. The changes of the distance between the center of pressure and lateral border off foot is correlated with the amount of the adduction mement on the knee joint.

Results: The vertical distance of foot center of pressure and lateral border of foot was statistically significant between single limb and doule limb support (p=0.001), before and after wearing variable pressure knee orthosis (p=0.001) and static pressure knee orthosis (p=0.03). the difference between both knee orthosis was also significant (p=0.002).

Conclusions: the variable pressure knee orthosis can reduce the adduction moment of the knee joint more than ordinary static pressure knee orthosis.