Centre for Musculoskeletal Research, University of Gävle, Box 7629, 907 12, Umeå, Sweden.
Eur J Appl Physiol. 2012 Jul;112(7):2703-15. doi: 10.1007/s00421-011-2244-1. Epub 2011 Nov 23.
This study determined the day-to-day reliability of NIRS-derived oxygenation responses (∆StO(2)%) for isometric contractions and for cuff occlusion. Twenty-four subjects (12 males and 12 females) were tested for 2 days (4-6 days interval). Variables generated were: (1) ∆StO(2)% for isometric contractions (10, 30, 50 and 70% MVC) for descending trapezius (TD) and extensor carpi radialis (ECR) muscles; (2) slope changes in total haemoglobin (HbTslope) and deoxyhaemoglobin (HHbslope) for the ECR using upper arm venous (VO, 50 mmHg) and arterial occlusion (AO, 250 mmHg); (3) recovery slopes (Rslope) for oxygen saturation (StO(2)) following isometric contractions and AO. For each variable, an intraclass correlation (ICC) was calculated to assess the ability to differentiate between subjects, and limits of agreement (LOA) were computed to assess day-to-day consistency of the measurement. ICCs for ΔStO(2)% were lowest at 10% MVC for both ECR (0.58) and TD (0.55), and highest at 30% MVC for ECR (0.95) and at 70% MVC for TD (0.79). For both muscles, LOA for ΔStO(2)% was lowest at 10% and highest at 50 and 70% MVC. ICC for HbTslope was 0.17. For HHbslope ICC was higher for AO (0.83) than for VO (0.73), and LOA was lower for AO. For the ECR Rslope ICCs ranged from 0.88 to 0.90 for contraction, but was lower for AO (0.33); LOA was lowest at 70% MVC. For trapezius Rslope ICCs ranged from 0.63 to 0.73 and LOA was lowest at 30% MVC. For this study, establishing reliability data for the ECR and TD and including variables commonly reported are expected to have meaning for future NIRS studies of work-related upper-extremity pain as well as for other NIRS research and clinical applications.
这项研究旨在确定近红外光谱（NIRS）衍生的氧合反应（∆StO(2)％）在等长收缩和袖带压迫期间的日常可靠性。24 名受试者（12 名男性和 12 名女性）在 2 天内（4-6 天间隔）接受了测试。生成的变量包括：（1）降斜方肌（TD）和桡侧腕伸肌（ECR）的等长收缩（10、30、50 和 70％最大握力）的∆StO(2)％；（2）使用上臂静脉（VO，50mmHg）和动脉闭塞（AO，250mmHg）时 ECR 的总血红蛋白（HbTslope）和脱氧血红蛋白（HHbslope）的斜率变化；（3）等长收缩和 AO 后氧饱和度（StO(2))的恢复斜率（Rslope）。对于每个变量，计算了组内相关系数（ICC）以评估区分受试者的能力，并计算了一致性界限（LOA）以评估测量的日常一致性。对于 ECR 和 TD，ECR 的 10％ MVC 的 ∆StO(2)％的 ICC 最低（分别为 0.58 和 0.55），而 ECR 的 30％ MVC 的 ICC 最高（0.95），而 TD 的 70％ MVC 的 ICC 最高（0.79）。对于两种肌肉，∆StO(2)％的 LOA 在 10％时最低，在 50％和 70％时最高。HbTslope 的 ICC 为 0.17。对于 HHbslope，AO 的 ICC 高于 VO（0.83 对 0.73），AO 的 LOA 较低。对于 ECR 的 Rslope，ICC 范围为收缩时的 0.88 至 0.90，但 AO 时较低（0.33）；70％ MVC 时 LOA 最低。对于斜方肌，Rslope 的 ICC 范围为 0.63 至 0.73，30％ MVC 时 LOA 最低。对于这项研究，为 ECR 和 TD 建立可靠性数据并包括常见报告的变量，预计对未来与工作相关的上肢疼痛的 NIRS 研究以及其他 NIRS 研究和临床应用具有重要意义。
