Academic Journal
A fibrin enhanced thrombosis model for medical devices operating at low shear regimes or large surface areas.
| Title: | A fibrin enhanced thrombosis model for medical devices operating at low shear regimes or large surface areas. |
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| Authors: | Rodrigo Méndez Rojano, Angela Lai, Mansur Zhussupbekov, Greg W Burgreen, Keith Cook, James F Antaki |
| Source: | PLoS Computational Biology, Vol 18, Iss 10, p e1010277 (2022) |
| Publisher Information: | Public Library of Science (PLoS), 2022. |
| Publication Year: | 2022 |
| Collection: | LCC:Biology (General) |
| Subject Terms: | Biology (General), QH301-705.5 |
| More Details: | Over the past decade, much of the development of computational models of device-related thrombosis has focused on platelet activity. While those models have been successful in predicting thrombus formation in medical devices operating at high shear rates (> 5000 s-1), they cannot be directly applied to low-shear devices, such as blood oxygenators and catheters, where emerging information suggest that fibrin formation is the predominant mechanism of clotting and platelet activity plays a secondary role. In the current work, we augment an existing platelet-based model of thrombosis with a partial model of the coagulation cascade that includes contact activation of factor XII and fibrin production. To calibrate the model, we simulate a backward-facing-step flow channel that has been extensively characterized in-vitro. Next, we perform blood perfusion experiments through a microfluidic chamber mimicking a hollow fiber membrane oxygenator and validate the model against these observations. The simulation results closely match the time evolution of the thrombus height and length in the backward-facing-step experiment. Application of the model to the microfluidic hollow fiber bundle chamber capture both gross features such as the increasing clotting trend towards the outlet of the chamber, as well as finer local features such as the structure of fibrin around individual hollow fibers. Our results are in line with recent findings that suggest fibrin production, through contact activation of factor XII, drives the thrombus formation in medical devices operating at low shear rates with large surface area to volume ratios. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 1553-734X 1553-7358 |
| Relation: | https://doaj.org/toc/1553-734X; https://doaj.org/toc/1553-7358 |
| DOI: | 10.1371/journal.pcbi.1010277 |
| Access URL: | https://doaj.org/article/b723d5a15732440b88fa500f5dd4c6bd |
| Accession Number: | edsdoj.b723d5a15732440b88fa500f5dd4c6bd |
| Database: | Directory of Open Access Journals |
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| ISSN: | 1553734X 15537358 |
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| DOI: | 10.1371/journal.pcbi.1010277 |
| Published in: | PLoS Computational Biology |
| Language: | English |