PIV Analysis of Stented Haemodynamics in the Descending Aorta

P. Williamson, P. D. Docherty, Sina G. Yazdi, Mark Jermy, Adib Khanafer, N. Kabaliuk, Patrick Geoghegan

Research output: Chapter in Book/Report/Conference proceedingConference publication

Abstract

Cardiovascular diseases (CVD) are the leading cause of death in the developed world and aortic aneurysm is a key contributor. Aortic aneurysms typically occur in the thoracic aorta and can extend into the descending aorta. The Frozen Elephant Trunk stent (FET) is one of the leading treatments for the aneurysms extending into the descending aorta. This study focuses on the in-vitro experimentation of a stented descending aorta, investigating the haemodynamics in a compliant phantom. A silicone phantom of the descending aorta was manufactured using a lost core casting method. A PVC stent was manufactured using the same mould core. Particle Image Velocimetry (PIV) was used for pulsatile studies, focusing specifically on the passive fixation at the distal end of the FET. The results showed an apparent expansion in the diastolic period that was identified to be a collapse in the lateral plane. Flow recirculation regions were identified during the collapse. The collapse was attributed to low upstream and high downstream pressures causing a vacuum effect. The findings may imply a potential risk introduced by the FET stent that requires further investigation.
Original languageEnglish
Title of host publication2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
PublisherIEEE
ISBN (Electronic)978-1-5386-1311-5
ISBN (Print)978-1-5386-1312-2
DOIs
Publication statusPublished - 7 Oct 2019

Publication series

Name2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
PublisherIEEE
ISSN (Print)1557-170X
ISSN (Electronic)1558-4615

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    Williamson, P., Docherty, P. D., Yazdi, S. G., Jermy, M., Khanafer, A., Kabaliuk, N., & Geoghegan, P. (2019). PIV Analysis of Stented Haemodynamics in the Descending Aorta. In 2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)). IEEE. https://doi.org/10.1109/EMBC.2019.8856823