Three-dimensional dynamical measurement of upper limb support during paraplegic walking
Three-dimensional dynamical measurement of upper limb support during paraplegic walking
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DOI：
10.1109/iembs.2004.1404366
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
Y. Hu;D. Ming;Y.Z. Wang;Y. Wong;B. Wan;K. Luk;J. Leong
中科院分区：
文献类型：
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作者：
Y. Hu;D. Ming;Y.Z. Wang;Y. Wong;B. Wan;K. Luk;J. Leong
功能性电刺激（FES）已用于截瘫康复，以恢复他们的行走能力。然而，目前对FES步行效率和康复进度的定量评价方法较少。本文提出了一种新的截瘫患者步行时上肢支撑力的动态测量方法，可用于计算三维手柄反力向量（HRV）。HRV可以提供FES辅助效率的评估。通过一系列的测试，验证了所设计系统的测量精度、非线性和串扰等性能。测力误差小于1.01%，非线性度小于2.90%，串扰小于3.19%。这意味着所实现的步行者系统对于在FES辅助步行期间测量HRV是可靠的。用截瘫受试者进行临床试验。通过对FES辅助步行的监测，发现HRV的向下分量减小，这意味着下肢产生的力减小。向下负荷曲线的下降斜率可以间接反映步行过程中FES效率的变化。实验和临床试验结果表明，成功地实现了一个三维动态测量系统，以间接评估下肢功能性电刺激的效率，通过定量的力量，由截瘫患者的上肢。
Functional electrical stimulation (FES) has been employed in paraplegic rehabilitation to resume their walking ability. However, there is less quantitative assessment method of FES walking efficiency and rehabilitation progress. This paper presents a new dynamical measurement of upper limb support force during paraplegic walking, which can be used to calculate the 3-D handle reaction vector (HRV). HRV may provide an assessment of FES-assisted efficiency. With a series of tests, the measurement accuracy, nonlinearity, and crosstalk of the designed system are testified. The force measurement error is found below 1.01%, while nonlinearity and crosstalk are less than 2.90%, and 3.19%, respectively. This means that the implemented walker system is reliable for the measurement of HRV during FES-assisted walking. A clinical trial is performed with a paraplegic subject. With the monitoring of FES-assisted walking, the downward component of HRV is found to decrease, implying the decreasing force generated from lower limb. The decrease slope in downward load curve can indirectly indicate the FES efficiency change during walking. The experiment and clinical trial results show that a 3-D dynamical measurement system is successfully accomplished to indirectly assess FES efficiency of lower limbs using quantitated forces applied by the upper limbs of paraplegic patients.