Article (Scientific journals)
Variation of the maximum velocity along the umbilical vein supports the Reynolds pulsometer modela
CAPELLE, Xavier; Schaaps, Jean-Pierre; BAVI DIDO, Jean-Vincent et al.
2019In Journal of Gynecology Obstetrics and Human Reproduction
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Keywords :
Numerical simulation; Pulsometer; Umbilical venous circulation; Wharton jelly
Abstract :
[en] Objective: To challenge, with a modern sonographic approach and a numerical model, the Reynolds's concept which suggests that the vascular structure of the umbilical cord could act as a pulsometer facilitating the venous return to the foetus. Method: Forty-five patients between 20 and 28 weeks of gestation were included in the study. The blood maximum velocity in the umbilical vein, measured at both foetal and placental ends, was assessed. Several sonographic parameters of the cord, including the diameter of the umbilical vein at both extremities, cord cross-sectional area and Wharton's jelly section surface were measured. We compare our data with those of a numerical model. Results: A difference in maximum velocity between the two extremities of the umbilical vein (ΔUV Vmax) was noted. The maximum velocity was significantly higher at the foetal umbilical end (14.12 +/-3.18 cm/s) than at the placental end (11.93 +/-2.55 cm/s; p < 0.0001). The mean difference is 2.2 +/- 2.3 cm/s. No difference in the umbilical vein diameter was measured at both cord ends (umbilical 4.85 +/-0.9 mm, placental 4.86 +/-0.87 mm, p < 0.0001). There is no significant relationship between ΔUV Vmax and the cord cross-sectional area or Wharton's jelly index. Conclusion: Modifications of the spatial velocity profile together with the pulsometer model could explain the maximum velocity changes that is measured in the umbilical vein along the cord. This numerical model consolidates the sonographic observations. © 2019
Disciplines :
Reproductive medicine (gynecology, andrology, obstetrics)
Author, co-author :
CAPELLE, Xavier ;  Centre Hospitalier Universitaire de Liège - CHU > Département de gynécologie-obstétrique > Secteur obstétrique
Schaaps, Jean-Pierre ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Département des sciences biomédicales et précliniques
BAVI DIDO, Jean-Vincent ;  Centre Hospitalier Universitaire de Liège - CHU > Département de gynécologie-obstétrique > Service de gynécologie-obstétrique
DAUBY, Morgane ;  Centre Hospitalier Universitaire de Liège - CHU > Département de gynécologie-obstétrique > Service de gynécologie-obstétrique (CHR)
Desaive, Thomas  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Thermodynamique des phénomènes irréversibles
VAN LINTHOUT, Christine ;  Centre Hospitalier Universitaire de Liège - CHU > Département de gynécologie-obstétrique > Secteur obstétrique
SEIDEL, Laurence  ;  Centre Hospitalier Universitaire de Liège - CHU > Département de gestion des systèmes d'informations (GSI) > Secteur d'appui à la recherche clinique et biostatistique
Kridelka, Frédéric ;  Université de Liège - ULiège > Département des sciences cliniques > Gynécologie-Obstétrique
Dauby, Pierre  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Thermodynamique des phénomènes irréversibles
Machrafi, Hatim ;  Université de Liège - ULiège > In silico medecine-Thermodynamics of Irreversible Processes
Language :
English
Title :
Variation of the maximum velocity along the umbilical vein supports the Reynolds pulsometer modela
Publication date :
2019
Journal title :
Journal of Gynecology Obstetrics and Human Reproduction
eISSN :
2468-7847
Publisher :
Elsevier Masson SAS
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 06 January 2020

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