Van Leeuwen B E, Lubbers J, Barendsen G J, de Pater L
Department of Medical Physics, Faculty of Medicine, Groningen University, The Netherlands.
J Appl Physiol (1985). 1992 May;72(5):1668-74. doi: 10.1152/jappl.1992.72.5.1668.
A procedure was developed that enables measurement of rapid variations in calf blood flow during voluntary rhythmic contraction of the calf muscles in supine, sitting, and standing positions. During the exercise, maximum blood velocity is measured by Doppler ultrasound equipment in the popliteal artery. The Doppler signals are calibrated by plethysmography to enable calculation of blood flow during exercise in ml.100 ml-1.min-1. Knowledge of the cross-sectional area of the vessel and the angle of insonation is not required in this procedure. Evaluation of the calibration method with 10 healthy volunteers showed that for each subject a new calibration was necessary after a change in posture; the relationship between the blood flow and the maximum Doppler frequency averaged over one heart cycle was linear for each calibration.
开发了一种程序，该程序能够在仰卧、坐姿和站立姿势下，测量小腿肌肉自主节律性收缩期间小腿血流的快速变化。在运动过程中，通过多普勒超声设备测量腘动脉中的最大血流速度。多普勒信号通过体积描记法进行校准，以便能够计算运动期间以ml.100 ml-1.min-1为单位的血流。该程序不需要了解血管的横截面积和超声入射角。对10名健康志愿者进行的校准方法评估表明，对于每个受试者，姿势改变后都需要重新校准；每次校准中，一个心动周期内平均血流与最大多普勒频率之间的关系均呈线性。
