多普勒超声测量外周动脉血流动力学指标可信性的实验研究

Peripheral Artery Blood Flow Measurements Using Pulsed Doppler and Electromagnetic Flowmetry in Dogs: A Comparative Study

用多普勒超声测量犬股动脉内径（Ｄ）、峰值流速（Ｖｐ）、平均流速（Ｖｍ）及流量（Ｑ），其结果与千分卡尺测量的内径（Ｄ′）及电磁流量计测得的峰值流速（Ｖｐ′）、平均流速（Ｖｍ′）及流量（Ｑ′）进行比较分析。结果表明：超声测得的内径与用卡尺测得的实际内径之间有良好的相关关系（ｒ＝０９１，Ｐ＜０００１）。Ｖｐ与电磁流量计测得的Ｖｐ′有较好的相关性（ｒ＝０９１，Ｐ＜０００２），Ｖｍ、Ｑ与Ｖｍ′、Ｑ′亦有相关系，但相关性稍弱（ｒ分别为０７９、０８３，Ｐ＜００５）。

To investigate the accuracy of blood flow parameters in peripheral artery by Doppler ultrasound, the intermal diameter(D), peak velocity(V p), mean velocity (V m) and flow volume (Q) of dog's femoral artery were measured by using either a pulsed Doppler (PD) system or electromagnetic flowmeters(EMFM). The results showed that the D measured by B mode ultrasound values significantly smaller than that by callipers but it correlat ed very well with the D by callipers. When the values of V p, V m and Q measured by pulsed Doppler and EMFM were compared, the V p had the most highly significant correlation between the data obtained by the two techniques(r∶0 91, 0.79,0.83 respectively). When V p, V m and Q were measured by angle correction of PD, the correlations between the data determined by the two techniques were still significant(r∶0 88,0.82,0.78).