UMBILICAL VEIN PULSATIONS - A PHYSIOLOGICAL FINDING IN EARLY GESTATION

被引:52
作者
RIZZO, G
ARDUINI, D
ROMANINI, C
机构
[1] UNIV CATTOLICA SACRO CUORE, DEPT OBSTET & GYNECOL, FETAL PHYSIOL LAB, I-00168 ROME, ITALY
[2] UNIV ANCONA, DEPT OBSTET & GYNECOL, I-60100 ANCONA, ITALY
关键词
DOPPLER ULTRASONOGRAPHY; VENOUS BLOOD FLOW; EARLY PREGNANCY;
D O I
10.1016/S0002-9378(11)91569-5
中图分类号
R71 [妇产科学];
学科分类号
100211 ;
摘要
OBJECTIVES: The purpose of this study was to establish the incidence of umbilical vein pulsations in normal early pregnancies and to evaluate whether these pulsations are related to Doppler-measured vascular resistances in umbilical artery or central venous flow patterns. STUDY DESIGN: We performed a cross-sectional study on 257 uneventful pregnancies at 7 to 16 weeks of gestation by means of transvaginal color and pulsed Doppler ultrasonography. Blood flow velocity waveforms were recorded from the umbilical artery, umbilical vein and, in 48 cases, also from fetal inferior vena cava. RESULTS: Pulsations in the umbilical vein were evidenced in all cases until 8 weeks. From this gestational age on pulsations progressively disappeared, becoming completely absent at greater-than-or-equal-to 13 weeks. The incidence of pulsations in the umbilical vein was unrelated to umbilical artery pulsatility index values, the incidence of absent end-diastolic flow in umbilical artery, and fetal heart rate. In the inferior vena cava, reverse flow during atrial contraction was significantly higher (p less-than-or-equal-to 0.002) in cases with umbilical vein pulsations than in those cases without pulsations at a similar gestational age. CONCLUSIONS: Pulsations in the umbilical vein are physiologically present during the first trimester of pregnancy and seem to be related to inferior vena cava flow patterns.
引用
收藏
页码:675 / 677
页数:3
相关论文
共 2 条
  • [1] VENOUS DOPPLER ULTRASONOGRAPHY IN THE FETUS WITH NONIMMUNE HYDROPS
    GUDMUNDSSON, S
    HUHTA, JC
    WOOD, DC
    TULZER, G
    COHEN, AW
    WEINER, S
    [J]. AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY, 1991, 164 (01) : 33 - 37
  • [2] INDIK JH, 1991, OBSTET GYNECOL, V77, P551