Affiliation:
1. Department of Biomedical Engineering, Sciences and Research Branch, Islamic Azad University, Tehran, Iran
Abstract
Abnormal flow in the ductus venosus can indicate fetal diseases such as chromosomal abnormalities, heart defects, hypoxia, and intrauterine growth restriction. However, the circulating blood flow to the fetus has not been studied in great detail, and doctors have obtained the necessary information to make the right decision about abortion before or even after birth using the data. In this paper, a comparative study is performed to determine blood velocity in ductus venosus using a combined method based on three-dimensional computational simulation and Doppler measurement. For this purpose, a model is proposed that has three paths, and the ratio of pressure to displacement in each path is calculated separately. The obtained results illustrate a linear relationship between the pressure and distance in first path and the greater the distance from the junction of the vessels, the lower the pressure in the path. Also, the greater the distance, the more pressure is created in the arteries in the second path. However, there is no linear relationship with pressure in the next path, although as the distance increases, the pressure decreases. The results demonstrate that the ductus venosus tolerates a higher level of displacement and pressure in comparison to the two other paths of the proposed model. The obtained results and velocity values can be considered as an indicator of any disease in the fetus.
Publisher
National Taiwan University
Subject
Biomedical Engineering,Bioengineering,Biophysics