Mohan, Rohit (2017) Endovascular repair of Type B aortic dissection: A study by computational fluid dynamics. Coursework Masters thesis, University of Southern Queensland. (Unpublished)
Abstract
Type B aortic dissection is a life threatening disease that occur due to the formation of false lumen from the true lumen of aorta. The false lumen may rupture as time passes due to the effect of aneurysm and alter the blood flow through the aorta. The blood enters the false lumen through an entry tear and joins back the true lumen through a re-entry tear at the descending aorta. However, the traditional treatment method was open surgery which is very expensive and poses lot of risk. The method of deployment of a stent is however found very effective in the case of Type B aortic dissection. The entry tear through which the blood enters the false lumen is covered by deploying a stent preventing the blood from flowing into the false lumen. Due to medical conditions, the stent will be only deployed to cover the entry tear. However, the patient might still at the verge of facing risk if the blood continue to enter the false lumen through the distal tear. A complete thrombosis or very low blood flow inside the false lumen is required to state that the patient is not facing any future risk. By Computational Fluid Dynamics (CFD), the blood flow inside the false lumen after a stent is grafted is studied by varying different parameters. The different parameters include varying the area ratio of false lumen to true lumen, changing the size of re-entry tear and changing the position of the re-entry tear along the length of the descending aorta. The velocity difference of blood inside the false lumen will help medical practitioner to predict any future risk the patient is posing. These results could be used to study the condition of the patient and perform a different medical treatment. The fluent simulation is carried out with the help of ANSYS version 17.2. The boundary conditions including the inlet velocity and outlet pressure are the main aspects set to obtain the required velocity of blood flow inside the false lumen. The aorta is considered rigid body without any slip conditions. The flow blood is calculated to be laminar and SIMPLE algorithm is used to conduct the simulation.
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| Item Type: | Thesis (Non-Research) (Coursework Masters) |
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| Item Status: | Live Archive |
| Additional Information: | Current UniSQ staff and students can request access to this thesis. Please email research.repository@unisq.edu.au with a subject line of SEAR thesis request and provide: Name of the thesis requested and Your name and UniSQ email address. |
| Faculty/School / Institute/Centre: | Current - Faculty of Health, Engineering and Sciences - No Department (1 Jul 2013 -) |
| Supervisors: | Mossad, Ruth |
| Qualification: | Master of Engineering Sciences (Mechanical Engineering) |
| Date Deposited: | 20 Jul 2026 01:17 |
| Last Modified: | 20 Jul 2026 01:17 |
| Uncontrolled Keywords: | Type B aortic dissection, false lumen, true lumen, aorta |
| URI: | https://sear.unisq.edu.au/id/eprint/53282 |
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