Funk A, Sohn C
Frauenklinik, RWTH Aachen.
Ultraschall Med. 1990 Feb;11(1):2-5. doi: 10.1055/s-2007-1011520.
The blood flow in the umbilical cord was examined via endovaginal Doppler sonography in 30 cases of early pregnancy. For the first time it was possible to examine by Doppler sonography the arterial blood flow in the completed 6th week of pregnancy p.m. With increased duration of gestation there was a continuous increase in arterial blood flow until establishment of a constant flow over the entire cardiac cycle with a constant presence of a diastole in the 14th pregnancy week. Venous blood flow also showed from the 7th pregnancy week p.m. onwards a constant development until attainment of a continuous Doppler flow profile in the 10th pregnancy week. Since the doppler curves of the same gestation period agree with one another, the Doppler profiles obtained in each case can be considered to be both typical and representative. The course of the Doppler flow curves shows the improving performance of the heart of the embryo in the direction of an increasing metabolic exchange between embryo and mature placenta via the increasingly efficient vascular systems.
通过经阴道多普勒超声检查了30例早孕病例的脐带血流。首次能够在妊娠第6周末通过多普勒超声检查动脉血流。随着妊娠期延长，动脉血流持续增加，直至在妊娠第14周整个心动周期建立恒定血流且舒张期持续存在。静脉血流也从妊娠第7周末开始持续发展，直至在妊娠第10周获得连续的多普勒血流图。由于同一妊娠期的多普勒曲线相互吻合，因此每种情况下获得的多普勒血流图可被视为既典型又具有代表性。多普勒血流曲线的变化过程表明，胚胎心脏的功能在不断改善，通过日益高效的血管系统，胚胎与成熟胎盘之间的代谢交换不断增加。
