| 제목 |
Effect of smart artificial leg on gait with transfemoral amputee |
| 소속 |
Chungnam National University, Department of Rehabilitation Medicine, School of Medicine1, Chungnam National University Hospital, Department of Rehabilitation Medicine2, Chungnam National University, Institute of Biomechanical Engineering3, Korea Orthopedics and Rehabilitation, Research Center4 |
| 저자 |
Jun-Hwan Choi3*, Jong-Hyun Park3, Su-Bin Kim3, Gwang-Sik Choi2, Sungjae Kang4, Jeicheong Ryu4, Kang Hee Cho1,2† |
Objective: The purpose of this study was to evaluate the gait abilities by applying a Smart artificial leg(power legⓇ) to the bilateral femoral amputee.
Subject & Methods: The subject was 48-year-old man who had weared Hydraulic artificial leg(3R80Ⓡ, OttobockⓇ) with bilateral transfemoral amputation due to a industrial accident in september 2014. In this study, we compared the gait abilities with 3R80Ⓡ and power legⓇ for one patient who has bilateral femoral amputation. The 3R80Ⓡ is rotary hydraulic, Power legⓇ is a new Electronic artificial leg that recognizes bio-signals and walking intention through equipped sensor. He walked for 5 minutes at 1.5km/h after wearing each artificial leg. They were evaluated by using the foot pressure analyzer in the form of a treadmill(Zebris FDMⓇ; Zebris Medical GmbHⓇ, Germany) and respiratory gas analyzer(Cosmed K4B2Ⓡ, Italy).
Results :The analysis of gait abilities showed that the power legⓇ had more symmetrical gait in the items of ankle rotation, step length, stance, double stance, and butterfly paragram between both limbs than the 3R80Ⓡ(Table 1, Figure 1). The energy consumption analysis showed that the power legⓇ was superior in VO2/kg(oxygen consumption), VCO2/kg(carbon dioxide emission) and HR(heart rate) than the 3R80Ⓡ(Table 2).
Conclusion : In this study, we analyzed the gait abilities between 3R80Ⓡ and power legⓇ. We measured the foot pressure and energy consumption with each artificial leg. This result showed power legⓇ is more symmetrical and superior in energy consumption than 3R80. We expect that this result will be used as a data for the improvement of the artificial leg.
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Table 1. Foot Pressure analysis of 3R80 and Power Leg
Table 2. Energy Consumption of 3R80 and Power Leg
Figure 1. Butterfly Paragram of 3R80 and Power Leg
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