PMID- 1505271
OWN - NLM
STAT- MEDLINE
DCOM- 19920918
LR  - 20161123
IS  - 0529-567X (Print)
IS  - 0529-567X (Linking)
VI  - 27
IP  - 1
DP  - 1992 Jan
TI  - [Fetal umbilical arterial blood flow velocity waveforms as measured in the uterus 
      by pulsed Doppler and B-mode ultrasound].
PG  - 15-8, 57-8
AB  - 3.0 MHz Doppler ultrasound was used to measure the umbilical arterial blood flow 
      velocity waveforms (FVW) in 174 fetuses between 22-42 weeks of gestation. The A/B 
      ratio (systolic/diastolic), resistance index (RI), pulsatility index (PI) and 
      impedance index (ImI) were used as indexes of placental flow resistance. In 
      normal pregnancy (n = 152), 460 measurements were performed. Analysis of these 
      waveforms demonstrated that the placental is an organ of low vascular resistance 
      and that placental resistance to blood flow gradually declines with advancing 
      gestational age. Our results indicated a significant negative correlation between 
      each of the four indexes and gestational age. There was a small but significant 
      decrease in all four indexes, from 22-42 weeks. 56 scans were performed on 22 
      fetuses with intrauterine growth retardation (IUGR). The sonograms from these 
      IUGR fetuses showed different characteristics which implied a high distal 
      impedance to the blood flow. 16 of these (72.7%) presented an abnormal increase 
      in all four indexes.
FAU - Huang, Y
AU  - Huang Y
AD  - First Affiliated Hospital Sun Yat-sen, University of Medical Sciences.
FAU - Kong, Q Y
AU  - Kong QY
LA  - chi
PT  - Journal Article
PL  - China
TA  - Zhonghua Fu Chan Ke Za Zhi
JT  - Zhonghua fu chan ke za zhi
JID - 16210370R
SB  - IM
MH  - Adult
MH  - Blood Flow Velocity
MH  - Female
MH  - Fetal Growth Retardation/diagnostic imaging
MH  - Humans
MH  - Pregnancy
MH  - *Ultrasonography, Prenatal
MH  - Umbilical Arteries/*diagnostic imaging
EDAT- 1992/01/01 00:00
MHDA- 1992/01/01 00:01
CRDT- 1992/01/01 00:00
PHST- 1992/01/01 00:00 [pubmed]
PHST- 1992/01/01 00:01 [medline]
PHST- 1992/01/01 00:00 [entrez]
PST - ppublish
SO  - Zhonghua Fu Chan Ke Za Zhi. 1992 Jan;27(1):15-8, 57-8.