Creekmore S P, Graham M M, Jahn G E, Targett R C, McIlroy M B
Ultrasound Med Biol. 1982;8(5):525-35. doi: 10.1016/0301-5629(82)90084-9.
Doppler blood velocity signals were recorded from the aorta and pulmonary artery in normal adults, children and premature infants, using three different pulsed, range-gated instruments. The tracings analyzed by three independent methods of spectral analysis with axially aimed transducers showed velocity patterns with a narrow range of frequencies (blunt velocity profile) with a constant acceleration of blood flow in early systole. A similar velocity pattern was seen in the premature infant's aorta in which the transducer beam was larger than the vessel insonated. We conclude that the normal velocity pattern in the central circulation is close to blunt, and that tracings obtained with transducers that insonate varying proportions of the vessel give similar signals.
使用三种不同的脉冲、距离选通仪器，记录了正常成人、儿童和早产儿主动脉和肺动脉的多普勒血流速度信号。采用轴向对准换能器的三种独立频谱分析方法对记录进行分析，结果显示频率范围较窄的速度模式（钝形速度剖面），早期收缩期血流呈恒定加速度。在早产儿主动脉中也观察到类似的速度模式，其中换能器束大于被检测的血管。我们得出结论，中心循环中的正常速度模式接近钝形，并且使用能检测血管不同比例的换能器获得的记录给出相似的信号。
