Yamakawa Satoshi, Wilps Tyler John, Takaba Keishi, Chan Calvin K, Takeuchi Satoshi, Kaufmann Robert A, Debski Richard E
Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA.
Department of Bioengineering and Orthopedic Robotics Laboratory, University of Pittsburgh, Pittsburgh, PA.
J Hand Surg Glob Online. 2023 Aug 31;5(6):823-827. doi: 10.1016/j.jhsg.2023.07.017. eCollection 2023 Nov.
To develop and evaluate the capabilities of a dynamic elbow testing apparatus that simulates unconstrained elbow motion throughout the range of humerothoracic (HTA) abduction.
Elbow flexion was generated by six computer-controlled electromechanical actuators that simulated muscle action, while six degree-of-freedom joint motion was measured using an optical tracking device. Repeatability of joint kinematics was assessed at four HTA angles (0°, 45°, 90°, 135°) and with two muscle force combinations (A1-biceps brachialis, brachioradialis and A2-biceps, brachioradialis). Repeatability was determined by comparing kinematics at every 10° of flexion over five flexion-extension cycles (0° to 100°).
Multiple muscle force combinations can be used at each HTA angle to generate elbow flexion. Trials showed that the testing apparatus produced highly repeatable joint motion at each HTA angle and with varying muscle force combinations. The intraclass correlation coefficient was greater than 0.95 for all conditions.
Repeatable smooth cadaveric elbow motion was created that mimicked the in vivo situation.
These results suggest that the dynamic elbow testing apparatus can be used to characterize elbow biomechanics in cadaver upper extremities.
开发并评估一种动态肘部测试装置的性能，该装置可在整个肱骨胸廓（HTA）外展范围内模拟无约束的肘部运动。
肘部屈曲由六个模拟肌肉动作的计算机控制电动执行器产生，同时使用光学跟踪装置测量六个自由度的关节运动。在四个HTA角度（0°、45°、90°、135°）以及两种肌肉力量组合（A1 - 肱二头肌、肱桡肌和A2 - 肱二头肌、肱桡肌）下评估关节运动学的重复性。通过比较五个屈伸周期（0°至100°）中每10°屈曲时的运动学来确定重复性。
在每个HTA角度可使用多种肌肉力量组合来产生肘部屈曲。试验表明，该测试装置在每个HTA角度以及不同肌肉力量组合下均产生了高度可重复的关节运动。所有条件下的组内相关系数均大于0.95。
创建了可重复的、平滑的尸体肘部运动，模拟了体内情况。
这些结果表明，动态肘部测试装置可用于表征尸体上肢的肘部生物力学。
