van de Bor M, Walther F J, Sims M E
Department of Pediatrics, University of Southern California School of Medicine, Los Angeles.
J Clin Ultrasound. 1990 Mar-Apr;18(3):167-71. doi: 10.1002/jcu.1870180305.
We measured the acceleration times in the pericallosal, internal carotid, and basilar arteries with two-dimensional/pulsed Doppler ultrasonography in 145 nondistressed preterm and term infants between 24 and 48 hours after birth. In all three arteries we found a linear relationship between the acceleration time and menstrual age or birth weight. These findings were determined by changes in peak systolic flow velocity, but not by changes in mean arterial blood pressure or cardiac output. We speculate on an important role for cerebral autoregulation in the acceleration time variations between newborn infants of differing menstrual ages and birth weights.
我们采用二维/脉冲多普勒超声检查法，对145例出生后24至48小时内未出现窘迫的早产和足月婴儿的胼周动脉、颈内动脉和基底动脉的加速时间进行了测量。在所有这三条动脉中，我们发现加速时间与月经龄或出生体重之间存在线性关系。这些发现是由收缩期峰值流速的变化所决定的，而非平均动脉血压或心输出量的变化。我们推测，脑自动调节在不同月经龄和出生体重的新生儿之间加速时间变化中起重要作用。
