Grant E G, White E M, Schellinger D, Choyke P L, Sarcone A L
Radiology. 1987 Apr;163(1):177-85. doi: 10.1148/radiology.163.1.3547492.
Duplex sonography was used to evaluate the cranial contents of 75 infants. The first 35 were scanned to establish technique and evaluate basic flow patterns. All cranial vessels scanned in healthy term infants produced diphasic (low-resistance) waveforms, although certain cerebral vessels had characteristic Doppler signatures. The pericallosal, callosomarginal, anterior cerebral, basilar, middle cerebral, and internal carotid arteries and the vein of Galen were isolated and evaluated in almost every subject. In the second part of the study duplex characteristics of healthy term infants, healthy preterm infants, preterm infants with intracranial hemorrhages, and hydrocephalic infants were evaluated. Relative flow velocity at peak systole and end diastole and pulsatility index were investigated. The most significant variable was gestational age. Preterm infants frequently had no forward flow during diastole. Duplex sonography does not appear to add significant diagnostic information to routine real-time cranial studies. It does, however, permit more exact evaluation of cerebral blood flow than does non-pulse-gated, nondirected Doppler scanning.
采用双功超声检查法对75例婴儿的颅内结构进行评估。最初的35例婴儿接受扫描以确立技术并评估基本血流模式。在健康足月儿中扫描的所有颅内血管均产生双相（低阻力）波形，尽管某些脑血管具有特征性的多普勒信号。几乎在每例受试者中均对胼周动脉、胼缘动脉、大脑前动脉、基底动脉、大脑中动脉、颈内动脉以及大脑大静脉进行分离并评估。在研究的第二部分，对健康足月儿、健康早产儿、颅内出血的早产儿以及脑积水婴儿的双功超声特征进行评估。研究了收缩期峰值和舒张期末的相对血流速度以及搏动指数。最显著的变量是胎龄。早产儿在舒张期常常没有正向血流。双功超声检查法似乎并未给常规实时颅脑检查增加重要的诊断信息。然而，与非脉冲门控、非定向多普勒扫描相比，它能更精确地评估脑血流。
