Tsunoda S, Shindo K, Shiozawa Z, Mano T
Third Department of Internal Medicine, Yamanashi Medical University.
Rinsho Shinkeigaku. 1990 Jun;30(6):621-4.
Although the method of impedance plethysmography made it possible to evaluate the vascular resistance of lower extremities, the actual correlation to the sympathetic nerve activity is not known. We performed examinations of microneurography and impedance plethysmography of the lower extremities, in six healthy volunteers, placed on a tilting table. Blood pressure, heart rate, muscle nerve sympathetic activity to calf muscles (microneurography), calf vascular resistance (impedance plethysmography) were simultaneously recorded with increasing angles of the head-up tilting (0, 30, 60 degrees). With the increase of tilting angles, sympathetic nerve activity and the calf vascular resistance significantly increased and these values were statistically correlated to the increase of tilting angles (expressed as sine function). Moreover, a statistically significant positive correlation was observed between the sympathetic nerve activity and vascular resistance. We concluded that the impedance plethysmographic method for measurement of calf vascular resistance is a good indicator for evaluating the peripheral sympathetic nerve activity.
尽管阻抗体积描记法能够评估下肢的血管阻力，但它与交感神经活动之间的实际相关性尚不清楚。我们对六名健康志愿者进行了下肢微神经ography和阻抗体积描记法检查，志愿者们被放置在倾斜台上。随着头高位倾斜角度（0、30、60度）的增加，同时记录血压、心率、小腿肌肉的肌肉神经交感神经活动（微神经ography）、小腿血管阻力（阻抗体积描记法）。随着倾斜角度的增加，交感神经活动和小腿血管阻力显著增加，并且这些值与倾斜角度的增加呈统计相关性（以正弦函数表示）。此外，在交感神经活动和血管阻力之间观察到统计学上显著的正相关。我们得出结论，用于测量小腿血管阻力的阻抗体积描记法是评估外周交感神经活动的良好指标。
