Article

Commercial versions of a stance-control knee-ankle-foot orthosis (SCKAFO) have
emerged to improve gait over conventional knee-ankle-foot orthoses (KAFOs), which
lock the knee in full extension in individuals with quadriceps muscle weakness. A
new electromechanical SCKAFO was recently designed to address the functional,
structural, and cost limitations of these commercial SCKAFOs. This paper presents
an evaluation of the new SCKAFO conducted to determine its functional and
clinical effectiveness during gait. Three healthy adults (100% male; age, 35.3
+/- 19.7y) and three KAFO users with knee extensor weakness in at least one limb
(100% male; mean age, 56.3 +/- 4.0y) participated in the study. The SCKAFO had a
minimal effect, as desired, on the kinematics of the able-bodied subjects. KAFO
users had a mean increase in knee flexion of 21.1 degrees (sd=8.2) during swing,
and a greater total knee range of motion when walking with the new SCKAFO
compared to their prescribed KAFO. Two KAFO users experienced a reduction in
pelvic obliquity and hip abduction angle abnormalities when walking with the
SCKAFO compared to their prescribed KAFO.

Langue : ANGLAIS