PDF(Pubmed)
Abstract：
Assessment of coupling between transtibial sockets and users is historically based on clinicians\' observations and experience, but can be inaccurate and unreliable. Therefore, we present a proof of concept, for five out of six possible degrees of freedom coupling metric system for a socket, using motion analysis calibrated on a 3D printed limb substitute. The method is compatible with any socket suspension method and does not require prior modifications to the socket. Calibration trials were used to locate the axis of rotation of the knee joint referenced against a marker cluster on the thigh; this allowed for the identification of the limb during test trials despite the entire residuum being obscured from view by the socket. The error in the technique was found to be within 0.7 mm in displacement and 0.7 degrees in rotation, based on the control data. Dynamic testing showed the Inter Quartile Range (IQR) of inter time step variance was <0.5 mm/deg for all metrics. The method can form a basis for objective socket evaluation, improve clinical practice and the quality of life for amputees.
摘要：
从历史上看，对经胫骨承窝和使用者之间的耦合进行评估是基于临床医生的观察和经验，但可能是不准确和不可靠的。因此,我们提出了一个概念证明，对于插座的六个可能的自由度耦合公制系统中的五个，使用在3D打印肢体替代品上校准的运动分析。该方法与任何插座悬挂方法兼容,并且不需要预先修改插座。使用校准试验来定位膝关节的旋转轴，该旋转轴与大腿上的标记簇相对应；尽管整个残留物被插座遮挡，但在测试试验期间仍可以识别肢体。发现该技术的误差在位移0.7毫米和旋转0.7度以内，基于控制数据。动态测试显示,对于所有度量,时间步长间方差的四分位数间范围(IQR)<0.5mm/deg。该方法可以形成客观套接字评估的基础，改善截肢者的临床实践和生活质量。
