Acute effects of continuous and intermittent vibration on finger circulation
Acute effects of continuous and intermittent vibration on finger circulation
复制标题
DOI：
10.1007/s00420-004-0507-4
复制
发表时间：
2004-05-01
影响因子：
3
通讯作者：
Griffin, MJ
中科院分区：
文献类型：
--
作者：
Bovenzi, M;Welsh, AJL;Griffin, MJ
目标。比较手指循环对具有相同的振动暴露总持续时间和相同的能量当量加速度大小的连续和间歇振动的急性响应。方法。对十名健康男性双手的中指和小指进行了手指血流量（FBF）测量。测量右手中指的手指皮肤温度（FST）。在 10 N 的静载荷下，右手中指在 44 m s(-2) 均方根 (r.m.s.) 的 5 种条件下暴露于 125 Hz：(1) 30 分钟连续暴露，(2) 两个周期 15 分钟，中间间隔 15 分钟，无振动，(3) 四个周期 7.5 分钟，间隔 7.5 分钟，无振动，(4) 八个周期，每次 15 分钟，中间间隔 7.5 分钟，无振动。 3.75 分钟，间隔 3.75 分钟，无振动，(5) 16 个 1.88 分钟周期，间隔 1.88 分钟，无振动。所有五次暴露均对应于 1.4 m s(-2) r.m.s 的 8 小时能量当量频率加权加速度幅度。根据国际标准 ISO 5349-1 (2001)。在施加振动之前、在振动暴露期间以及 45 分钟恢复期间以固定间隔测量手指循环。结果。 FST 在振动暴露期间没有变化，而与暴露前的 FBF 相比，所有振动条件都会导致振动手指的 FBF 显着降低。在振动暴露期间，振动在振动的手指中引起类似程度的血管收缩，但在间歇暴露期间没有累积效应的证据。暴露于 30 分钟的连续振动结束后，FBF 逐渐下降，而暴露于间歇振动后，FBF 没有统计学上显着的下降。结论。对于所研究的振动刺激（暴露时间从 1.88 分钟到 30 分钟不等，休息时间从 1.88 分钟到 15 分钟不等），连续振动和间歇振动在暴露期间 FBF 的减少是相同的。连续振动暴露后，振动的后效应更大。尽管这项研究的一些证据与间歇性振动的影响不如连续振动的严重性这一观点一致，但这一证据尚未得出结论。
Objectives. To compare the acute response of finger circulation to continuous and intermittent vibration having the same total duration of vibration exposure and the same energy-equivalent acceleration magnitude. Methods. Finger blood flow (FBF) was measured in the middle and little fingers of both hands of ten healthy men. Finger skin temperature (FST) was measured in the middle right finger. With a static load of 10 N, the middle finger of the right hand was exposed to 125 Hz at 44 m s(-2) root mean square (r.m.s.) in five conditions: (1) 30 min continuous exposure, (2) two periods of 15 min, separated by a 15 min period with no vibration, (3) four periods of 7.5 min, separated by 7.5 min periods with no vibration, (4) eight periods of 3.75 min, separated by 3.75 min periods with no vibration, (5) 16 periods of 1.88 min, separated by 1.88 min periods with no vibration. All five exposures correspond to an 8 h energy-equivalent frequency-weighted acceleration magnitude of 1.4 m s(-2) r.m.s. according to International Standard ISO 5349-1 (2001). Finger circulation was measured in all four digits before the application of vibration and at fixed intervals during vibration exposure and during a 45 min recovery period. Results. The FST did not change during vibration exposure, whereas all vibration conditions produced significant reductions in FBF of the vibrated finger when compared with the pre-exposure FBF. During vibration exposure, the vibration caused a similar degree of vasoconstriction in the vibrated finger without evidence of cumulative effects during intermittent exposure. After the end of exposure to 30 min of continuous vibration there was a progressive decrease in the FBF, whereas there was no statistically significant reduction following exposure to intermittent vibration. Conclusions. For the vibration stimuli investigated (exposure durations varying from 1.88 min to 30 min, with rest periods varying from 1.88 min to 15 min), the reduction of FBF during exposure was the same for continuous and intermittent vibration. The after effect of vibration was greater following the continuous vibration exposure. Although some evidence from this study is consistent with the notion that intermittent vibration has a less severe effect than continuous vibration, this evidence is not yet conclusive.