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New publication about patient-specific estimates of vascular and placental properties in growth-restricted fetuses based on a model of the fetal circulation

Abstract:

Intrauterine growth restriction (IUGR) due to placental insufficiency is associated with blood-flow redistribution in order to maintain perfusion to the brain. However, some hemodynamic parameters that might be more directly related to staging of the disease cannot be measured non-invasively in clinical practice. For this, we developed a patient-specific model of the fetal circulation to estimate vascular properties of each individual. A lumped model of the fetal circulation was developed and personalized using measured echographic data from 37 normal and IUGR fetuses to automatically estimate model-based parameters. The estimated model-based placental and brain resistances were respectively increased and reduced in IUGR fetuses while placental compliance was increased in IUGR fetus. Umbilical and middle cerebral arteries PIs were most associated with both placental resistance and compliance, while uterine artery PI was more associated with the placental compliance. The logistic regression analysis showed that the model added significant information to the traditional analysis of Doppler waveforms for predicting adverse outcome in IUGR. The proposed patient-specific computational model seems to be a good approach to assess hemodynamic parameters than cannot be measured clinically.

Authors:

Patricia Garcia-Canadilla, Fatima Crispi, Monica Cruz-Lemini, Stefania Triunfo, Alfons Nadal, Brenda Valenzuela-Alcaraz, Paula A. Rudenick, Eduard Gratacosa and  Bart H. Bijnens

Link: http://www.sciencedirect.com/science/article/pii/S0143400415300242