Document Detail

The flow resistance of the spiral artery and the related intervillous space in the rhesus monkey placenta.
MedLine Citation:
PMID:  104276     Owner:  NLM     Status:  MEDLINE    
Uteroplacental arteries of 4 rhesus monkeys were cannulated at their myometrical portions and perfused with dextran solutions and blood. Pressure-flow curves were obtained for the spiral artery and the related intervillous space, i.e. for the functional cotyledonary unit of the haemochorial villous placenta. For a flow of 3 ml.min-1, which is probably the normal rate of flow through the spiral artery, the pressure at the entry of the spiral artery was found to be 13--18 mm Hg (1.7--2.4kPa) during uterine relaxation (uterine diastole). There was a direct proportional relationship between the spiral artery flow and the pressure difference between the spiral artery and the amniotic fluid; the pressure difference per flow (the resistance of the cotyledonary unit) was found to be 1--3 mm Hg . ml-1 . min (8--24kPa . ml-1 . s). It is concluded that the spiral artery and the related intervillous space do not offer a limiting resistance to maternal blood flow in the absence of uterine contractions.
W Moll; H C Wallenburg; E Kastendieck; M Voslar
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Pflügers Archiv : European journal of physiology     Volume:  377     ISSN:  0031-6768     ISO Abbreviation:  Pflugers Arch.     Publication Date:  1978 Nov 
Date Detail:
Created Date:  1979-03-13     Completed Date:  1979-03-13     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0154720     Medline TA:  Pflugers Arch     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  225-8     Citation Subset:  IM    
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MeSH Terms
Blood Pressure
Macaca / anatomy & histology*
Macaca mulatta / anatomy & histology*
Placenta / anatomy & histology,  blood supply*
Regional Blood Flow

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

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