In vivo measures of rotator cuff muscle dynamics

所要求的设备用于肩关节复合体模型的体内验证，以确定肩关节矫形器中的保护臂位置，从而加速肩袖手术后的康复。需要三个测量装置。肩关节手术期间，将使用16通道细导丝肌内肌电图（EMG）系统监测肩袖肌肉激活。撕裂修复手术期间，将体内肌肉应力/应变传感器（关节镜下插入式测力探头，AIFP和差分可变磁阻传感器，DVRT）连接到肌腱上。这些设备将由5名全职教授使用，他们目前在模拟和运动建模实验室监督15名学生和助手。目前，只有间接的措施可用于验证肩部复合体肌肉激活，因为没有一个肩袖肌肉的力量，这是深肌肉和大多数受伤发生的地方可以估计。细线EMG和微型AIFP-DVRT传感器将能够直接测量应力/应变。这些信息对于验证肩部复合体模型至关重要，同时也为受伤肌肉提供了独特的力数据。它还将提供原位信息，骨科医生结合真实的时间运动学分析。这可能会导致更好的治疗手术和术后通过肩/臂支具。

The equipment requested is to be used in the in-vivo validation of shoulder complex model in determining the sheltered arm position in a shoulder orthosis to speed up rehabilitation after rotator cuff surgery. Three measuring devices are requested. A 16 channel fine wire intra-muscular electromyography (EMG) system will be used to monitored rotator cuff muscle activations during shoulder surgery. The in-vivo muscle stress/strain sensors (Arthroscopically Insertable Force Probes, AIFP and the Differential Variable Reluctance Transducers, DVRT) will be attached to the muscle tendon during tear repair surgery. These equipments will be used by 5 full-time professors who presently supervise 15 students and assistants in the Simulation and Movement Modeling laboratory. Presently only indirect measures are available to validate the shoulder complex muscle activations since none of the rotator cuff muscles forces which are deep muscles and where most of the injuries take place can be estimated. The fine wire EMG and the miniature AIFP-DVRT sensors will enable direct stress/strain measurements. This information will be crucial to validate the shoulder complex model but also provide unique force data on injured muscles. It will also supply in-situ information to the orthopedic surgeons in combination with a real time kinematical analysis. This could lead to better treatment both surgically and post-operatively through shoulder/arm bracing.