Evaluation of Above-Knee Amputees while Walking with Nabtesco Knee Joint
Evaluation of Above-Knee Amputees while Walking with Nabtesco Knee Joint
Fatemeh Kheiri
ABSTRACT
Above-knee amputees may miss their abilities to stand and walk. They have to use various prosthesis components to enhance their abilities to stand and walk. Nabtesco-knee joint is one of knee joint components designed for an active above-knee amputees. ere was no study on kinematic, kinetic and stability of amputees with this knee joint. This study was aimed to evaluate the per- formance of amputees walking with this knee joint. Two above-knee amputees using Nabtesco knee joint were recruited. eir kinematic and kinetics parameters were evaluated by use of the motion analysis system and a Kistler force plate. The stability of subjects during standing and their energy consumption while walking were analyzed by the use of a Kistler force plate and a polar heart rate monitoring. The difference between the kinetic and kinematic between sound and prosthetic sides was evaluated by two sample t-test. The physiological cost index of amputees varied between 0.42 and 0.74 beats per minute. there was no signi cant di erence between the range of motion of ankle, knee, hip and pelvic rang of motions between both sides. The plantar exion moment in prosthesis and sound sides varied from 0.92-0.98 N/BW and 1.19-1.39 N/BW, respectively (p value of di er- ence <0.05). The energy consumption of amputees was high due to reduced walking speed. However walking with Nabtesco knee joint improved the symmetry of walking and kinematic of the joints in prosthesis side compared to the sound side.
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