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Hyrtl's anastomosis, the only connection between the two umbilical arteries. A study in full term placentas from AGA infants with normal umbilical artery blood flow

Ullberg, Ulla; Sandstedt, Bengt and Lingman, Göran LU (2001) In Acta Obstetricia et Gynecologica Scandinavica 80(1). p.41280-41280
Abstract
Background The aim of this study was to describe the Variable anatomy in the anastomosis between the umbilical arteries for better understanding of the physical characteristics of the umbilical Row velocity waveform (FVW). Methods. The arterial system of 67 placentas from pregnancies with normal umbilical FVW and resulting in a full-term AGA infant was visualized by angiography. The method allowed study of the anatomy of the anastomosis between the umbilical arteries and calculation of the relative placental area supplied by each umbilical artery. Results. In 60 cases there was one anastomosis between the umbilical arteries, in one case then were two, in four the anastomosis was absent, and another two cases had a single umbilical artery.... (More)
Background The aim of this study was to describe the Variable anatomy in the anastomosis between the umbilical arteries for better understanding of the physical characteristics of the umbilical Row velocity waveform (FVW). Methods. The arterial system of 67 placentas from pregnancies with normal umbilical FVW and resulting in a full-term AGA infant was visualized by angiography. The method allowed study of the anatomy of the anastomosis between the umbilical arteries and calculation of the relative placental area supplied by each umbilical artery. Results. In 60 cases there was one anastomosis between the umbilical arteries, in one case then were two, in four the anastomosis was absent, and another two cases had a single umbilical artery. The anastomosis was represented by a vessel, a fenestration or coalescence of the umbilical arteries. In case the anastomosis diameter was of at least that of the umbilical arteries, they supplied in mean 26% and 74% (+/-8.2%) of the placental area respectively. When the anastomosis diameter was smaller than that of the umbilical arteries their supply areas were in mean 41% and 59% (+/-6.0%) respectively. In placentas lacking anastomosis the two umbilical arteries supplied 45% and 55% (+/-2.6%) respectively, indicating a higher degree of symmetry. Conclusions. By using angiography we were able to demonstrate the variable anatomy of the anastomosis of Hyrtl. We found the occurrence and width of the anastomosis was correlated to the symmetry in size between the supply areas of each umbilical artery. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
placenta angiography, Hyrtl's anastomosis, placental vascular asymmetry, umbilical arteries
in
Acta Obstetricia et Gynecologica Scandinavica
volume
80
issue
1
pages
41280 - 41280
publisher
Wiley-Blackwell
external identifiers
  • wos:000166462000001
ISSN
1600-0412
DOI
10.1080/791201785
language
English
LU publication?
yes
id
7d5316c0-15a4-4872-a873-58ea36c8681a (old id 1119704)
date added to LUP
2008-07-17 08:25:57
date last changed
2016-04-16 04:52:48
@article{7d5316c0-15a4-4872-a873-58ea36c8681a,
  abstract     = {Background The aim of this study was to describe the Variable anatomy in the anastomosis between the umbilical arteries for better understanding of the physical characteristics of the umbilical Row velocity waveform (FVW). Methods. The arterial system of 67 placentas from pregnancies with normal umbilical FVW and resulting in a full-term AGA infant was visualized by angiography. The method allowed study of the anatomy of the anastomosis between the umbilical arteries and calculation of the relative placental area supplied by each umbilical artery. Results. In 60 cases there was one anastomosis between the umbilical arteries, in one case then were two, in four the anastomosis was absent, and another two cases had a single umbilical artery. The anastomosis was represented by a vessel, a fenestration or coalescence of the umbilical arteries. In case the anastomosis diameter was of at least that of the umbilical arteries, they supplied in mean 26% and 74% (+/-8.2%) of the placental area respectively. When the anastomosis diameter was smaller than that of the umbilical arteries their supply areas were in mean 41% and 59% (+/-6.0%) respectively. In placentas lacking anastomosis the two umbilical arteries supplied 45% and 55% (+/-2.6%) respectively, indicating a higher degree of symmetry. Conclusions. By using angiography we were able to demonstrate the variable anatomy of the anastomosis of Hyrtl. We found the occurrence and width of the anastomosis was correlated to the symmetry in size between the supply areas of each umbilical artery.},
  author       = {Ullberg, Ulla and Sandstedt, Bengt and Lingman, Göran},
  issn         = {1600-0412},
  keyword      = {placenta angiography,Hyrtl's anastomosis,placental vascular asymmetry,umbilical arteries},
  language     = {eng},
  number       = {1},
  pages        = {41280--41280},
  publisher    = {Wiley-Blackwell},
  series       = {Acta Obstetricia et Gynecologica Scandinavica},
  title        = {Hyrtl's anastomosis, the only connection between the two umbilical arteries. A study in full term placentas from AGA infants with normal umbilical artery blood flow},
  url          = {http://dx.doi.org/10.1080/791201785},
  volume       = {80},
  year         = {2001},
}