Document Detail


Redistribution pattern of fetal liver circulation in intrauterine growth restriction.
MedLine Citation:
PMID:  19707895     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE. Fetal liver blood supply is an important determinant of fetal growth and adaptation. Most fetal liver blood supply is from the umbilical vein, but the portal vein contributes 14-20% and studies of low-risk pregnancies suggest the splanchnic arteries are also involved in the homeostasis of fetal liver perfusion. Here we determine the circulatory pattern of the fetal liver in intrauterine growth restriction (IUGR). DESIGN. Cross-sectional study. POPULATION. Thirty-one IUGR fetuses (estimated fetal weight <5th centile). METHODS. Pulsatility index (PI) measurements of the umbilical, middle cerebral, splenic, hepatic, and superior mesenteric arteries were compared with a reference population and related to umbilical venous flow, umbilico-caval pressure gradient (assessed by ductus venosus peak velocity) and venous distribution within the liver (assessed by flow velocity in the left portal vein). RESULTS. Thirteen of 31 IUGR fetuses had umbilical artery PI > 97.5 centile and 13 showed a middle cerebral artery brain-sparing pattern (PI Z-score < - 2). In IUGR, umbilical venous flow was lower and less umbilical blood was distributed to the right liver lobe, while the umbilico-caval pressure gradient was kept normal. The hepatic and splenic arteries, but not the superior mesenteric artery, had low PI compared with the reference population. CONCLUSIONS. IUGR fetuses with increased or normal umbilical artery PI maintained venous perfusion pressure to the liver while distributing less umbilical blood to the right liver lobe. They showed regional splanchnic arterial redistribution with low splenic and hepatic artery PI, implying increased portal venous flow and direct arterial contribution to hepatic perfusion, respectively.
Authors:
Cathrine Ebbing; Svein Rasmussen; Keith M Godfrey; Mark A Hanson; Torvid Kiserud
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta obstetricia et gynecologica Scandinavica     Volume:  88     ISSN:  1600-0412     ISO Abbreviation:  Acta Obstet Gynecol Scand     Publication Date:  2009  
Date Detail:
Created Date:  2009-11-20     Completed Date:  2009-12-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370343     Medline TA:  Acta Obstet Gynecol Scand     Country:  England    
Other Details:
Languages:  eng     Pagination:  1118-23     Citation Subset:  IM    
Affiliation:
Department of Obstetrics and Gynecology, Haukeland University Hospital, Bergen, Norway. cathrine.ebbing@helse-bergen.no
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Cross-Sectional Studies
Female
Fetal Growth Retardation / physiopathology*
Humans
Infant, Newborn
Liver / blood supply*
Liver Circulation / physiology*
Male
Pregnancy
Pregnancy Trimester, Second
Pulsatilla / physiology
Regional Blood Flow
Splanchnic Circulation / physiology
Umbilical Arteries / physiopathology
Young Adult
Grant Support
ID/Acronym/Agency:
//British Heart Foundation

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


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