Comparison of peak shoulder and elbow mechanical loads during weight-relief lifts and sitting pivot transfers among manual wheelchair users with spinal cord injury
Comparison of peak shoulder and elbow mechanical loads during weight-relief lifts and sitting pivot transfers among manual wheelchair users with spinal cord injury
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DOI：
10.1682/jrrd.2007.11.0189
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发表时间：
2008-01-01
影响因子：
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通讯作者：
Piotte, France
中科院分区：
文献类型：
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作者：
Gagnon, Dany;Nadeau, Sylvie;Piotte, France
本研究在生物力学实验室评估期间比较了13名脊髓损伤（SCI）的手动轮椅使用者在举重（WRLs）和坐式支点转移（SPTs）之间的肩关节和肘关节力和力矩。在spt（主导和主导角色）和wrl期间，报告了优势肩和肘关节力的每个三轴分量的最小值和最大值。我们还分析了同一时期观察到的峰肩屈肌和内收肌力矩，以及肘关节屈肌和伸肌力矩。与腕部扭伤（-2.2 N/kg）相比，腕部扭伤主要使肩关节暴露于大量的后向力（领先= -2.6 N/kg；后向= -3.1 N/kg），而在腕部扭伤期间，与腕部扭伤（领先= 1.5 N/kg；后向= 1.5 N/kg）相比，腕部扭伤主要承受了正向力（2.9 N/kg） （p < 0.001）。在肘部观察到较高的上向力（3.6 - 3.9 N/kg），两种任务之间具有可比性（p = 0.33）。肩关节屈肌峰值（领先= 1.36 N.m/kg，落后= 1.45 N.m/kg）和内收肌力矩（领先= -0.46 N.m/kg）以及肘关节屈肌峰值力矩（领先= 0.24 N.m/kg，落后= 0.15 N.m/kg）在SPTs期间明显高于WRLs （p < 0.021）。前肢肩部内收肌峰值（-0.46 N.m/kg vs -0.24 N.m/kg）和肘关节屈肌力矩也比后肢高（p = 0.03）。两个任务（-0.17至-0.25 N.m/kg）之间的肘关节伸肌力矩峰值没有差异（p = 0.167）。在脊髓损伤患者中，spt比wrl使肩关节和肘关节暴露于更大的机械负荷。
This study compared shoulder and elbow joint forces and moments between weight-relief lifts (WRLs) and sitting pivot transfers (SPTs) among manual wheelchair users with spinal cord injury (SCI) (N = 13) during biomechanical laboratory assessment. Minimum and maximum values were reported for each triaxial component of the joint force at the dominant shoulder and elbow during SPTs (leading and trailing roles) and WRLs. Peak shoulder flexor and adductor moments, along with elbow flexor and extensor moments, observed during the same period were also analyzed. The SPTs predominantly exposed (p < 0.001) the shoulder joints to substantial posteriorly directed forces (leading = -2.6 N/kg; trailing = -3.1 N/kg) compared with WRLs (-2.2 N/kg), whereas superiorly directed forces (2.9 N/kg) were principally sustained (p < 0.001) during WRLs compared with SPTs (leading = 1.5 N/kg; trailing = 1.5 N/kg). High superiorly directed forces (3.6 to 3.9 N/kg) were observed at the elbow, which were comparable (p = 0.33) between the two tasks. The peak shoulder flexor (leading = 1.36 N.m/kg; trailing = 1.45 N.m/kg) and adductor moments (leading only = -0.46 N.m/kg), along with the peak elbow flexor moments (leading = 0.24 N.m/kg; trailing = 0.15 N.m/kg), were significantly more elevated (p < 0.021) during SPTs than during WRLs. Peak shoulder adductor (-0.46 vs -0.24 N.m/kg) and elbow flexor moments were also more elevated (p = 0.03) at the leading upper limb compared with the trailing one. The peak elbow extensor moments did not differ (p = 0.167) between the two tasks (-0.17 to -0.25 N.m/kg). SPTs exposed the shoulder and elbow joints to greater mechanical loads than WRLs among individuals with SCI.