Document Detail

Fetal cerebral haemodynamic adaptation: a progressive mechanism? Pulsed and color Doppler evaluation.
MedLine Citation:
PMID:  1479515     Owner:  NLM     Status:  MEDLINE    
The importance of studying, by Doppler ultrasound, the cerebral haemodynamics to monitor the fetal response to the hypoxia is well known, but there is not a general agreement about the anatomical landmarks for the middle cerebral artery. Seventy-one normal fetuses and fifteen IUGR fetuses were studied. The umbilical artery and the middle cerebral artery (MCA) were evaluated by color Doppler ultrasound. The well-known decrease of the pulsatility index from the umbilical artery was observed throughout pregnancy. This velocimetric pattern did not occur in the IUGR fetuses. Four IUGR fetuses showed the ARED (absent or reversed and diastolic flow) pattern. The MCA was evaluated at the origin (M1) and at the distal tract (M2). PI values from M1 and M2 decreased during the pregnancy. A significant difference was detected between M1 and M2 PI values from the 26th to the 37th week of gestation. The M1 brain sparing effect was detected in the IUGR fetuses. Two ARED fetuses, observed during labor, showed the M2 sparing effect. The different Doppler patterns found in M1 and M2 could be due to the functional differences existing between these tracts. As a matter of fact, M1 and M2 supply different parts of the fetal brain, which develop in different periods of fetal life. These findings, if ulteriorly confirmed, could offer new perspectives for the monitoring of high risk fetuses.
M Locci; G Nazzaro; G De Placido; U Montemagno
Related Documents :
12890395 - The relationship between catecholamines levels in mother and fetus, and pathogenesis of...
11844165 - Maternal left ventricular mass and diastolic function during pregnancy.
14578485 - Glycine rectifies vascular dysfunction induced by dietary protein imbalance during preg...
11641135 - Does nitric oxide contribute to the basal vasodilation of pregnancy in conscious rabbits?
7055185 - Improved prediction of fetal lung maturity in diabetic pregnancies: a comparison of chr...
7501205 - Second trimester uterine atony imitating ectopic pregnancy: magnetic resonance diagnosis.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of perinatal medicine     Volume:  20     ISSN:  0300-5577     ISO Abbreviation:  J Perinat Med     Publication Date:  1992  
Date Detail:
Created Date:  1993-02-11     Completed Date:  1993-02-11     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0361031     Medline TA:  J Perinat Med     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  337-43     Citation Subset:  IM    
Department of Gynecology and Obstetrics, University of Naples, II Medical School, Italy.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Adaptation, Physiological
Cerebral Arteries / physiology,  ultrasonography
Cerebrovascular Circulation / physiology*
Fetal Growth Retardation / physiopathology,  ultrasonography
Fetus / physiology*
Gestational Age
Umbilical Arteries / physiology,  ultrasonography

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Vibro-acoustic stimulation does not alter the duration of high and low fetal heart rate variability ...
Next Document:  Prediction of RDS by amniotic fluid analysis: a comparison of the prognostic value of traditional an...