Hirsimäki H, Kero P, Wanne O, Erkkola R, Makoi Z
Department of Pediatrics, Turku University Hospital, Finland.
Pediatr Cardiol. 1988;9(2):79-83. doi: 10.1007/BF02083704.
Noninvasive Doppler-derived cardiac output was measured with the pulsed Doppler method in 22 healthy newborns during their first four days of life. Maximal blood flow velocity in the aorta was measured with the Doppler ultrasound method. The mean Doppler-derived cardiac output was 273 +/- 59 ml/min/kg. Ductal left-to-right shunting was also determined and then graded according to the flow in the main pulmonary artery. The mean Doppler-derived cardiac output was 301 +/- 61 ml/min/kg when there was a moderate ductal left-to-right shunt, 266 +/- 59 ml/min/kg when the shunting was mild, and 260 +/- 53 ml/min/kg when there was no shunting ductus. The Doppler-derived cardiac output was significantly higher when there was a moderate left-to-right shunt than without such shunting. This method seems to be a useful approach in monitoring the cardiac function of newborns without unduly disturbing their condition. Normal values on Doppler-derived cardiac output have to be judged in relation to the magnitude of ductal left-to-right shunt.
采用脉冲多普勒法对22例健康新生儿出生后前4天的无创多普勒心输出量进行了测量。用多普勒超声法测量主动脉内的最大血流速度。平均多普勒心输出量为273±59毫升/分钟/千克。还确定了导管的左向右分流情况，并根据主肺动脉内的血流情况进行分级。当存在中度导管左向右分流时，平均多普勒心输出量为301±61毫升/分钟/千克；当分流为轻度时，为266±59毫升/分钟/千克；当不存在导管分流时，为260±53毫升/分钟/千克。存在中度左向右分流时的多普勒心输出量显著高于无此类分流时。该方法似乎是一种监测新生儿心功能的有用方法，且不会过度干扰其状况。多普勒心输出量的正常值必须结合导管左向右分流的程度来判断。
