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An Optimized Procedure to Develop a Three Dimensional Microfluidic Hydrogel with Parallel Transport Networks.
International Journal for Numerical Methods in Biomedical Engineering 2018 September 15
The development of microfluidic hydrogels is an attractive method to generate continues perfusion, induce vascularization, increase solutes delivery and ultimately improve cell viability. However, the transport processes in many in vitro studies still have not been realized completely. To address this problem, we have developed a micro-channeled hydrogel with different collagen type I concentration of 1, 2 and 3 wt.% and assessed its physical properties and obtained diffusion coefficient of nutrient within the hydrogel. It is well known that micro-channels geometry has critical role in maintaining stable perfusion rate. Therefore, in this study a computational modeling was applied to simulate the 3D microfluidic hydrogel and study the effect of geometric parameters such as microchannel diameters and their distance on the nutrient diffusion. The simulation results showed that the sample with 3 channels with a diameter of 300 μm has adequate diffusion rates and efficiency (56%). Moreover, this system provides easy control and continuous perfusion rate during 5 days of cell culturing. The simulation results were compared with experimental data and a good correlation was observed for nutrient profiles and cell viability across the hydrogel.
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