Montgomery L D, Williams B A
Aviat Space Environ Med. 1977 Mar;48(3):231-5.
Impedance plethysmography was used to measure bilateral blood flow in the forearms, hands, and digits of seven healthy male subjects. The objectives were to determine the degree of symmetry between right and left body segments and to quantify the extent of vasomotor change at ambient temperatures ranging from 10 degrees to 46 degrees C. The mean forearm blood flow index ranged from 3.9 ml/(100 ml . min) at 10 degrees C to 7.5 ml/(100 ml . min) at 46 degrees C. Mean hand blood flow indices increased from 1.6 ml/(100 ml . min) at 10 degrees C to 10.7 ml (100 ml . min) at 46 degrees C. Finger blood flow indices in the proximal and medial phalanges of the five digits ranged from less than 1.0 ml/(100 ml . min) at 10 degrees C to over 27.0 ml/(100 ml . min) at 46 degrees C. Although each subject demonstrated variations in right and left side blood flow during any selected experiment the grouped mean flow indices exhibited no statistically significant side dominance. These experiments quantify the vasomotor alterations in the upper extremities and indicate that the more distal body segments exhibit relatively larger vasomotor responses to changes in ambient temperature than do the more proximal body segments.
采用阻抗容积描记法测量了7名健康男性受试者双侧前臂、手部和手指的血流量。目的是确定身体左右两侧各部分之间的对称程度，并量化在10摄氏度至46摄氏度的环境温度范围内血管舒缩变化的程度。前臂平均血流量指数在10摄氏度时为3.9毫升/（100毫升·分钟），在46摄氏度时为7.5毫升/（100毫升·分钟）。手部平均血流量指数从10摄氏度时的1.6毫升/（100毫升·分钟）增加到46摄氏度时的10.7毫升/（100毫升·分钟）。五个手指近节指骨和中节指骨的手指血流量指数在10摄氏度时小于1.0毫升/（100毫升·分钟），在46摄氏度时超过27.0毫升/（100毫升·分钟）。尽管在任何选定的实验中，每个受试者的左右侧血流量都有变化，但分组平均流量指数没有显示出统计学上显著的侧别优势。这些实验量化了上肢的血管舒缩变化，并表明身体越远端的部分对环境温度变化的血管舒缩反应相对比近端部分更大。
