用多普勒超声测量新生儿心输出量的可重复性。
Reproducibility of measurements of cardiac output in newborn infants by Doppler ultrasound.
作者信息
Hudson I, Houston A, Aitchison T, Holland B, Turner T
机构信息
Royal Hospital for Sick Children, Yorkhill, Glasgow.
出版信息
Arch Dis Child. 1990 Jan;65(1 Spec No):15-9. doi: 10.1136/adc.65.1_spec_no.15.
Abstract
Interobserver reproducibility in deriving cardiac output by measuring aortic blood flow velocity and diameter with imaging and Doppler ultrasound was investigated in 20 healthy infants born at full term. Aortic diameter was measured in three ways. Mean blood flow velocity was measured at three sites with both continuous wave and pulsed Doppler. Two observers carried out each study independently. Intraobserver reproducibility was investigated in 12 infants using the suprasternal site for measuring blood flow velocity. The most reproducible determination of cardiac output was found when the suprasternal site with continuous wave Doppler was used for measurement of blood flow velocity and M mode trailing edge to leading edge echocardiography was used for diameter. Normal mean (2 SD) cardiac output is 231 (77) ml/kg/min. Technical difficulties in measuring aortic diameter accurately limit direct comparison between infants.
摘要
通过成像和多普勒超声测量主动脉血流速度和直径来推导心输出量的观察者间再现性，在20名足月出生的健康婴儿中进行了研究。主动脉直径通过三种方式测量。平均血流速度在三个部位用连续波和脉冲多普勒测量。两名观察者各自独立进行每项研究。在12名婴儿中使用胸骨上部位测量血流速度来研究观察者内再现性。当使用胸骨上部位的连续波多普勒测量血流速度并使用M型从后缘到前缘超声心动图测量直径时，发现心输出量的最可重复测定。正常平均（2个标准差）心输出量为231（77）ml/kg/min。准确测量主动脉直径的技术困难限制了婴儿之间的直接比较。
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