Gisvold S E, Brubakk A O
Cardiovasc Res. 1982 Jan;16(1):26-33. doi: 10.1093/cvr/16.1.26.
The reproducibility and ease of use of a pulsed Doppler system has been investigated in 27 normal subjects. Measurements were performed in the ascending aorta and the aortic arch in the sitting and supine position. Good quality recordings were obtained in over 90% of the subjects. Maximum velocities of 120 and 108 cm . s-1 were found in the supine position of the ascending aorta in males and females respectively, while the corresponding acceleration were 2254 and 2148 cm . s-2. When moving from the sitting to the supine position, changes in integral under the mean and maximum velocity curve, which is supposed to be proportioned to stroke volume, were approximately 30% both in the ascending aorta and in the aorta arch. Making certain assumptions about dimensions of the aorta, reasonable values for cardiac output could be calculated in all subjects. The reproducibility of the measurements was tested by making ten repeat measurements in five subjects. The mean variation coefficient was between 6 and 11% for all measured variables. It is concluded that blood-flow velocity can be measured in the ascending aorta and the aortic arch using pulsed ultrasound and that the method has a reproducibility which permits measurements of changes in the flow and flow velocity of over 10%.
在27名正常受试者中研究了脉冲多普勒系统的可重复性和易用性。在坐位和仰卧位时，于升主动脉和主动脉弓处进行测量。超过90%的受试者获得了高质量的记录。男性和女性在仰卧位时升主动脉的最大速度分别为120和108 cm·s⁻¹，而相应的加速度分别为2254和2148 cm·s⁻²。从坐位变为仰卧位时，升主动脉和主动脉弓处平均速度曲线和最大速度曲线下积分的变化（假定与每搏输出量成比例）约为30%。对主动脉尺寸做出某些假设后，可计算出所有受试者的心输出量合理值。通过对5名受试者进行10次重复测量来测试测量的可重复性。所有测量变量的平均变异系数在6%至11%之间。得出的结论是，使用脉冲超声可测量升主动脉和主动脉弓处的血流速度，且该方法具有可重复性，能够测量超过10%的血流和血流速度变化。
