Počet záznamů: 1
Image-Based Modeling of Blood Flow and Oxygen Transfer in Feto-Placental Capillaries
- 1.
SYSNO ASEP 0467394 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Image-Based Modeling of Blood Flow and Oxygen Transfer in Feto-Placental Capillaries Tvůrce(i) Pearce, P. (GB)
Brownbill, P. (GB)
Janáček, Jiří (FGU-C) RID, ORCID
Jirkovská, M. (CZ)
Kubínová, Lucie (FGU-C) RID, ORCID
Chernyavsky, I. L. (GB)
Jensen, O. E. (GB)Číslo článku e0165369 Zdroj.dok. PLoS ONE. - : Public Library of Science - ISSN 1932-6203
Roč. 11, č. 10 (2016)Poč.str. 22 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova placenta ; capillaries ; oxygen transfer ; confocal microscopy Vědní obor RIV EA - Morfologické obory a cytologie Institucionální podpora FGU-C - RVO:67985823 UT WOS 000389604900069 EID SCOPUS 84992732420 DOI 10.1371/journal.pone.0165369 Anotace During pregnancy, oxygen diffuses from maternal to fetal blood through villous trees in the placenta. In this paper, we simulate blood flow and oxygen transfer in feto-placental capillaries by converting three-dimensional representations of villous and capillary surfaces, reconstructed from confocal laser scanning microscopy, to finite-element meshes, and calculating values of vascular flow resistance and total oxygen transfer. The relationship between the total oxygen transfer rate and the pressure drop through the capillary is shown to be captured across a wide range of pressure drops by physical scaling laws and an upper bound on the oxygen transfer rate. A regression equation is introduced that can be used to estimate the oxygen transfer in a capillary using the vascular resistance. Two techniques for quantifying the effects of statistical variability, experimental uncertainty and pathological placental structure on the calculated properties are then introduced. First, scaling arguments are used to quantify the sensitivity of the model to uncertainties in the geometry and the parameters. Second, the effects of localized dilations in fetal capillaries are investigated using an idealized axisymmetric model, to quantify the possible effect of pathological placental structure on oxygen transfer. The model predicts how, for a fixed pressure drop through a capillary, oxygen transfer is maximized by an optimal width of the dilation. The results could explain the prevalence of fetal hypoxia in cases of delayed villous maturation, a pathology characterized by a lack of the vasculo-syncytial membranes often seen in conjunction with localized capillary dilations. Pracoviště Fyziologický ústav Kontakt Lucie Trajhanová, lucie.trajhanova@fgu.cas.cz, Tel.: 241 062 400 Rok sběru 2017
Počet záznamů: 1