Qamar M I, Read A E, Skidmore R, Evans J M, Wells P N
Gut. 1986 Jan;27(1):100-5. doi: 10.1136/gut.27.1.100.
A duplex scanner which consists of a real time two dimensional scanner and a pulsed Doppler flowmeter was used to measure superior mesenteric blood flow in 70 healthy subjects. By processing the Doppler shift signals, the instantaneous average Doppler shift frequency and then the instantaneous average velocity of the flow rate were calculated. Both diameter of the vessel and angle between vessel and beam were measured from real time imaging. The mean (+/- standard error of the mean) of the superior mesenteric blood flow was 517 +/- 19 ml/min. There was neither significant difference in flow between sexes, nor correlation between flow and age (r = 0.042). The mean of coefficients of variability were 6.8% over the short term, and 8.2% in long term studies.
使用一台由实时二维扫描仪和脉冲多普勒流量计组成的双功能扫描仪，对70名健康受试者的肠系膜上血流进行测量。通过处理多普勒频移信号，计算出瞬时平均多普勒频移频率，进而得出流速的瞬时平均速度。血管直径以及血管与超声束之间的夹角均通过实时成像测量。肠系膜上血流的平均值（±平均值的标准误差）为517±19毫升/分钟。性别之间的血流无显著差异，血流与年龄之间也无相关性（r = 0.042）。短期变异性系数的平均值为6.8%，长期研究中的平均值为8.2%。
