Takiwaki H, Serup J
Department of Dermatology, School of Medicine, University of Tokushima, Japan.
Skin Pharmacol. 1994;7(4):226-30. doi: 10.1159/000211298.
To investigate the influence of arm position on the color and blood flow of the forearm skin, the CIE Lab* values, the erythema and melanin indices, and laser-Doppler blood flow values were recorded at three different arm positions (lowered, heart level and raised) in 15 healthy subjects using three kinds of optoelectronic instruments. The values of almost all color parameters, including the melanin index, changed stepwise significantly following the change in the arm position, and blood flow values decreased significantly during arm lowering. These results are most likely due to complex changes in the volume, flow rate and oxygen saturation level of the blood in the superficial vascular plexus, and their influences on each parameter were discussed. To use these instruments effectively for the quantitative evaluation of skin test reactions, a standardized arm position should be kept when the test is carried out in the forearm.
为研究手臂位置对前臂皮肤颜色和血流的影响，使用三种光电仪器，在15名健康受试者的三个不同手臂位置（下垂、与心脏水平齐平、上举）记录CIE Lab*值、红斑和黑色素指数以及激光多普勒血流值。几乎所有颜色参数的值，包括黑色素指数，都随着手臂位置的变化而显著逐步改变，并且在手臂下垂过程中血流值显著降低。这些结果很可能是由于浅表血管丛中血液的体积、流速和氧饱和度水平的复杂变化所致，并讨论了它们对每个参数的影响。为了有效地使用这些仪器对皮肤试验反应进行定量评估，在前臂进行试验时应保持标准化的手臂位置。
