手部红外图像结合冷水试验对周围循环功能的评价

目的　研究手传振动对周围循环功能的影响及其评价方法。方法　振动作业工人３７ 名（ 接振组） ,非接振健康工人３０ 名（ 对照组） ,在冷水负荷前后,用ＫＹ３３３ 型远红外摄像仪进行手部红外摄像,对图像进行对比分析。结果　冷试前两组工人手部红外图像差异无显著性;冷水试验后手部红外图像变化显著,接振组手指皮肤温度下降,复温时间延长。结论　手部红外摄像结合冷水负荷试验可以评价周围循环机能障碍的早期变化     

手部红外图像和冷水试验在手传振动病健康监护中的应用

目的 通过手部红外摄像和冷水试验检查,确定手传振动对手部周围循环功能的影响。方法 通过对振动作业工人50名（接振组）,非接振健康工人50名（对照组）,在冷水负荷前后,用KY-333型远红外摄像仪进行手部红外摄像,对图像进行对比分析。结果 冷水试验前,两组工人手部红外图像差异无统计学意义;冷水试验后,手部红外图像变化显著,接振组手指5、10 min皮肤温度显著低于对照组（P〈0.01）,复温时间延长。结论 尚未发生振动性白指的接振工人中已经出现冷水试验的手部红外图像变化,表明手部红外图像分析对周围循环功能障碍具有早期识别和亚临床意义。     

振动作业工人手部红外图像分析

目的研究振动作业人员手部红外摄像和冷水试验对手臂振动病周围循环功能的改变。方法通过对非接触振动的健康工人50名(对照组)、尚未发生振动性白指的振动作业工人50名(接振组),在冷水负荷前后,用KY-333型远红外摄像仪进行手部红外摄像,研究手部周围循环功能的变化。结果冷水试验前两组工人手部红外图像差异无显著性(P>0.05);冷水试验后5和10min接振组手指皮肤温度比对照组下降显著(P<0.05和P<0.01),两组冷水试验后5min平均皮温分别为:右手(21.5±1.7)和(23.5±1.8)℃,左手(20.5±1.1)和(24.0±1.6)℃;接振组复温时间延长。结论手部红外摄像结合冷水试验对振动作业工人周围循环功能障碍具有早期识别意义。     

振动作业工人手部红外图像分析

目的研究振动作业人员手部红外摄像和冷水试验对手臂振动病周围循环功能的改变。方法通过对非接触振动的健康工人50名（对照组）、尚无发生振动性白指的振动作业工人50名（接振组）,在冷水负荷前后,用KY-333型远红外摄像仪进行手部红外摄像,研究手部周围循环功能的变化。结果冷水试验前两组工人手部红外图像差异无统计学意义（P〉0.05）;冷水试验后5 min和10 min接触振动组手指皮肤温度比对照组下降显著（P〈0.05和P〈0.01）,两组冷水试验后5min平均皮温分别为：右手（21.5±1.7）℃和（23.5±1.8）℃,左手（20.5±1.1）℃和（24.0±1.6）℃;接振组复温时间延长。结论手部红外摄像结合冷水试验对振动作业工人周围循环功能障碍具有早期识别意义。     

冷水试验方法的改进

目的　改进冷水试验方法。方法　应用１０ ℃、１０ｍｉｎ 的冷水试验方法对白指病人、接振工人及对照工人手部皮温恢复情况进行比较。结果　白指病人和对照工人冷试前后手部皮肤温度和各时间的复温率均明显降低, 而接振组和对照组比较, 在１５ 、２０ 、３０ｍｉｎ 的皮温显著降低, 各时间的复温率均低于对照组。结论　１０ ℃、１０ｍｉｎ 的冷水试验方法能用于评价外周循环功能。     

正常人手部温度分布及冷水试验影响的红外图像分析

应用ＫＹ－３３３型远红外摄像仪,对３０名正常人在两种冷水试验前后手部皮肤温度分布进行研究。结果表明,正常人在两种冷水试验前后同手不同手指之间及左右手相应手指之间温度比较,差异无显著性。手背皮温在冷试后即刻及５ｍｉｎ时显著高于各手指皮温,而１５ｍｉｎ后又低于手指皮温。说明正常人左右手之间及不同的手指之间的皮温没有差异,可以测量某一手指皮温来代替手部皮温。     

振动作业者手部冷水试验红外图像测温

[目的]利用红外摄像结合冷水试验了解手臂振动对手部周围循环功能的影响。[方法]通过对振动作业工人50名（接振组），非接振健康工人50名（对照组），在冷水负荷前后，用KY-333型远红外摄像仪进行手部红外摄像，对图像分析并进行对比。[结果]冷水试验前，两组工人手部红外图像差异无统计学意义（P〉0．05）；冷水试验后接振组手指皮肤温度较对照组下降，复温时间延长（P〈0．01）。[结论]振动作业对手部周围循环功能有影响，红外摄像结合冷水试验可作为检查方法之一。     

手臂振动对手部红外图像影响的研究

对３７名手臂振动作业工人和３０名健康对照工人,在冷水试验和振动负荷试验前后,以ＫＹ－３３３型远红外摄像仪进行手都红外摄像,比较研究其图像变化。结果表明,试验前两组基础指温差异不显著;试验后接振组指温下降明显。复温时间延长,冷试后５ｍｉｎ、１０ｍｉｎ;振动负荷后即刻、５ｍｉｎ差异显著。红外图像的改变,有助于振动职业危害的亚临床研究。     

10℃冷水试验方法在评价振动职业危害中的应用研究

研究１０℃冷水试验方法在评价振动职业危害中的应用。「方法」对白指病人、接振工人及对照工人进行冷水试验检查,用热电偶温度计测量冷试前后手部皮肤温度。「结果」白指病人和对照工人比较,在冷试前后手部皮肤温度和各时间的复温率均明显降低,而接振组和对照组比较,在１５ｍｉｎ、２０ｍｉｎ、３０ｍｉｎ的皮肤温度降低,各时间的复温率均组。各组间恢复到冷试前的人数有显著性差异。「结论」１０℃的冷水试验方法能用于评价振     

局部振动对周围神经与血管机能影响的研究

目的 探讨局部振动对作业工人周围神经、周围血管功能的影响。方法 对振动作业工人进行正中神经传导速度、动作电位波幅的测试,并通过１０℃、１０ｍｉｎ的冷水试验对作业工人手部皮肤温度的恢复情况进行了研究。结果 白指组正中神经的感觉神经、运动神经传导速度明显低于对照组（Ｐ〈０．０１）;冷水试验前后白指组的手部温度均显著低于接振组和对照组（Ｐ〈０．０１）,冷水试验后白指组、接振组的复温率均显著低于对照组（Ｐ     

Laser Doppler imaging of skin blood flow for assessing peripheral vascular impairment in hand-arm vibration syndrome

The objective of this study was to evaluate the usefulness of laser Doppler imaging (LDPI) of the skin blood flow for assessing peripheral vascular impairment in the hand-arm vibration syndrome (HAVS). The subjects were 46 male patients with HAVS, aged 50 to 69 yr, and 31 healthy male volunteers of similar age as controls. A cold provocation test was carried out by immersing a subject's hand on his more severely affected side into cold water at a temperature of 10 degrees C for 10 min. Repeated image scanning of skin blood flow of the index, middle, and ring fingers was performed every 2 min before, during, and after the cold water immersion using a PMI-II laser Doppler perfusion imager. The mean blood perfusion values in the distal phalanx area of the fingers were calculated on each image. The patients suffering from vibration-induced white finger (VWF, n=20) demonstrated significantly lower skin blood perfusion at each interval of the test as compared with those without VWF (n=26) and the controls (p<0.01, ANOVA). The blood perfusions in the HAVS patients were associated with the severity of the symptoms as classified by the Stockholm Workshop scale for vascular staging. When a subject was considered to be positive if any of the tested fingers showing a decreased blood perfusion and/or a delayed recovery pattern, the sensitivity was 80.0%, and the specificity was 84.6% and 93.5% for patients without VWF and the controls, respectively. These results suggest that the LDPI technique could provide detailed and accurate information that may help detect the existence of impaired vascular regulation to cold exposure in the fingers of workers exposed to hand-transmitted vibration.     

振动性白指—局部受冷和振动负荷后的末梢循环表现

本研究分为三个组:(1)振动白指组(29例);(2)振动无白指组(105例);(3)对照组(60例)。 研究表明:振动白指组冷水试验的白指再现率为10％,而振动无白指组和对照组无一例出现白指;Ⅰ期振动性白指患者的皮温恢复时间延长者占40％,而Ⅱ期和Ⅲ期振动白指患者皮温恢复时间延长者均为100％;振动白指组的指血流图平均波辐高度冷水试验后显著低于冷水试验前(P<0.01),而振动无白指组和对照组没有这种差异。 本文讨论上述试验在振动性白指诊断中的意义。     

手传振动对外周循环功能的影响及其与植物神经功能关系的研究

为探讨手传振动对外周循环功能与植物神经功能的关系,对39名金矿岩工人进行冷水试验前后手部红外摄像及心率变异性的研究。结果表明,白指组、接振组SDNANN较对照组明显降低,LF／HF较对照组明显增高,且均以白指组变化最甚（P＜0．05,P＜0．01）;冷水试验前、后白指组、接振组皮肤温度较对照组明显下降,其中白指组降低最基（P＜0．05,P＜0．01）。提示手臂振动导致植物神经功能紊乱可能是作业工人外周循环功能异常的原因。     

手臂振动对心率变异性及外周循环功能影响的研究

探讨手臂振动对作业工人心率变异性与外周循环功能的影响及二者之间的关系。「方法」对某金矿凿岩工人进行了心率变异性的评价指标ＳＤＡＮＮ、ＬＦ／ＨＦ分析,并测试了冷水试验前后作业工人的皮肤温度以及试验后５ｍｉｎ、１０ｍｉｎ的复温度。结论手臂振动造成的外周循环功能障碍可能与植物神经功能紊乱有一定关系。     

Preliminary study on the assessment of peripheral vascular response to cold provocation in workers exposed to hand-arm vibration using laser Doppler perfusion imager

Measurements of changes in finger skin blood flow with laser Doppler perfusion imaging (LDPI) in response to cold provocation test (10 degrees C, 10 min) were performed in 12 men suffering from vibration induced white finger (VWF) and 13 exposed controls. The mean perfusion values in both groups reduced markedly as a result of immersion of the hand in cold water. In the controls, however, the mean value increased gradually until the end of the cold provocation, while that in the VWF subjects remained at the lowest level. After removal of the hand from the cold water, the skin blood perfusion in the controls recovered rapidly and nearly reached the baseline value. In the VWF subjects, it had a slight increase immediately following the cold immersion but no tendency to rise as the time span increased. Analysis of covariance controlling for possible confounders revealed that the VWF subjects had significantly lower perfusion values compared to the controls in the last several minutes of the cold provocation and the following recovery. These findings suggest that the LDPI technique enables visualizing and quantifying the peripheral vascular effects of cold water immersion on the finger skin blood perfusion and thus has the potential of providing more detailed and a&curate information that may help detect the peripheral circulatory impairment in the fingers of vibration-exposed workers.     

Circulatory disturbances of the foot in vibration syndrome

Summary Circulatory disturbances of the foot in patients with vibration syndrome were studied by measuring the skin temperature of both index fingers and great toes through a 3-min immersion of the right foot in cold water at 10°C. Subjects included 11 patients with vibration-induced white finger (VWF) [VWF(+) group], 12 patients without VWF [VWF(–) group], and 20 healthy referents not exposed to vibration. Patients were all male chain saw operators who had scarcely been exposed to vibration of the foot. The prevalence of coldness felt in the upper and lower extremities was > 90% in the VWF(+) group, about 60% in the VWF(–) group, and < 10% in the referents. The extent of the coldness was greatest in the VWF (+) group. The skin temperature of both fingers and toes was lowest in the VWF(+) group, somewhat higher in the VWF(–) group, and highest in the referents both before and after immersion. These findings indicate that patients with vibration syndrome, especially those with VWF, have circulatory disturbances in the foot as well as in the hand. The disturbances in the foot may be related to long-term repeated vasoconstriction in the foot induced by hand-arm vibration through the sympathetic nervous system.