Fillinger M F, Schwartz R A
Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire 03756.
J Ultrasound Med. 1993 Mar;12(3):123-30. doi: 10.7863/jum.1993.12.3.123.
Volumetric flow rates were obtained in an in vivo canine pulsatile flow model using color Doppler ultrasonography (CDUS) and timed collection (TC) over a range which included laminar and turbulent flow. CDUS demonstrated increasing flow disturbance as flow rates increased, with effects on velocity profile, diameter measurements, and flow symmetry. Data comparing CDUS and TC showed marked differences in laminar flow (regression: slope = 1.02; r2 = 0.93; mean error, 11%) and nonlaminar flow (slope = 0.53; r2 = 0.78; mean error, 26%). Assigning the angle of insonation precisely was crucial to measurement accuracy. CDUS quantitates volumetric blood flow with a reasonable degree of accuracy under laminar flow conditions. Visual clues provided by CDUS can help avoid errors associated with deviations from laminar flow.
在体内犬类脉动血流模型中，使用彩色多普勒超声（CDUS）和定时采集（TC）在包括层流和湍流的范围内获得体积流速。随着流速增加，CDUS显示血流紊乱加剧，对速度剖面、直径测量和血流对称性产生影响。比较CDUS和TC的数据显示，层流（回归：斜率 = 1.02；r2 = 0.93；平均误差，11%）和非层流（斜率 = 0.53；r2 = 0.78；平均误差，26%）存在显著差异。精确确定超声入射角对测量准确性至关重要。在层流条件下，CDUS能以合理的准确度定量体积血流量。CDUS提供的视觉线索有助于避免与层流偏差相关的误差。
