• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Biomedical Engineering >Use of near-infrared spectroscopy in evaluating upper extremity muscle hemodynamics during an eight-hour exposure to repetitive hand-wrist motions
【24h】

Use of near-infrared spectroscopy in evaluating upper extremity muscle hemodynamics during an eight-hour exposure to repetitive hand-wrist motions

机译：在八小时接触重复手腕运动期间使用近红外光谱法评估上肢肌肉血流动力学

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We evaluated local hemodynamic responses simultaneously from flexor and extensor muscles in the forearm of 14 male workers while performing repetitive ulnar deviation task for 8 hours. First, a psychophysical approach was utilized to identify participants' maximum acceptable torque (in Nm) at 15 and 25 repetitions per min (rpm). Second, while performing an ulnar deviation task repetitively for 8 hours at their psychophysically acceptable torque, Tissue Oxygenation Index (TOI) and Tissue Hemoglobin Index (THI) were collected. Workers exerted lower acceptable torque for the task with a repetition rate of 25 rpm as compared to 15 rpm (3.57 ± 2.7 versus 3.97 ± 2.5 Nm, P=0.014). When the TOI responses (representing muscle oxygen saturation) after each hour of effort were matched for the net acceptable torque exerted, the mean TOI-torque ratio was 10.2% higher in the flexor region as compared to the extensor region throughout the workday. Also, when corrected for the torque exerted during both the 15 rpm and 25 rpm tasks, a dynamic adjustment of THI (representing muscle blood volume) to the time course of TOI resulted, suggesting a strong coupling between muscle blood flow and oxygen uptake as the task continued. Although the acceptable torque exerted was lowest for the 25 rpm task, the increased TOI-torque ratio coupled with increased THI per torque generated suggests that working at 25 rpm is metabolically more challenging than at 15 rpm.
机译：我们在14名男性工人的前臂的屈肌和伸肌肌肉中同时评估了本地血液动力学响应，同时进行重复的尺偏偏差任务8小时。首先，利用心理物理方法在每分钟（RPM）的15和25重复时识别参与者的最大可接受扭矩（在NM中）。其次，在他们的心理物质上可接受的扭矩下重复进行8小时进行尺寸偏差任务，收集组织氧合指数（TOI）和组织血红蛋白指数（THI）。与15 rpm相比，重复率为25rpm的任务施加了较低的可接受扭矩（3.57＆＃x00b1; 2.7与3.97＆＃x00b1; 2.5 nm，p = 0.014）。当对施加净可接受的扭矩匹配的努力之后的ToI响应（代表肌氧饱和度）时，与整个工作日的伸肌区域相比，屈肌区域中的平均To-扭矩比为10.2％。此外，当校正在15rpm和25 rpm任务期间施加的扭矩时，Thi（代表肌肉血量）的动态调整到Toi的时间过程，表明肌血流量和氧气摄取之间的强耦合任务继续。尽管施加的可接受的扭矩对于25rpm任务最低，但增加了与每个扭矩增加的增加的Toi-扭矩比表明，在25rpm下工作比15rpm更具有挑战性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号