Lubbers J, Bernink P J, Barendsen G J, van den Berg J W
Pflugers Arch. 1979 Nov;382(3):241-8. doi: 10.1007/BF00583708.
A transcutaneous Doppler velocimeter has been used for monitoring changes in blood flow in the popliteal artery during and after exercise of the calf muscles on a calf-ergometer. The instrument and the positioning of the probe are described. The validity of the Doppler measurements has been assessed by comparing results after exercise and after 5 min arterial occlusion with venous occlusion plethysmography. For 10 healthy volunteers calibration lines were found which are curved. This can be ascribed partly to alinearity of the Doppler instrument and partly to changes of the diameter of the popliteal artery. Displacement of the probe with respect to the artery, which influences the measured velocity signal, can be detected and to a certain extent corrected by taking into account the intensity of the Doppler signal. The largest deviation of a data point from the corresponding calibration line varies for the ten subjects between 90 and 170 Hz in the high flow range (mean Doppler frequency around 1000 Hz) and between 20 and 60 Hz in the low flow range (mean Doppler frequency below 200 Hz).
一种经皮多普勒测速仪已被用于监测在小腿测力计上进行小腿肌肉运动期间及之后腘动脉血流的变化。文中描述了该仪器及探头的定位。通过将运动后和5分钟动脉闭塞后的结果与静脉闭塞体积描记法进行比较，评估了多普勒测量的有效性。对于10名健康志愿者，发现校准线是弯曲的。这部分可归因于多普勒仪器的非线性，部分可归因于腘动脉直径的变化。探头相对于动脉的位移会影响测量的速度信号，通过考虑多普勒信号的强度，可以检测到这种位移并在一定程度上进行校正。在高流量范围（平均多普勒频率约为1000赫兹），十个受试者的数据点与相应校准线的最大偏差在90至170赫兹之间变化；在低流量范围（平均多普勒频率低于200赫兹），最大偏差在20至60赫兹之间变化。
