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ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
IN VITRO EXPERIMENTAL INVESTIGATION OF AORTIC VALVE TILT ANGLE ON HEMODYNAMIC FLOW PATTERNS
Submission Author:
Guilherme Moreira Bessa , RJ , Brazil
Co-Authors:
Guilherme Moreira Bessa, BRUNO AZEVEDO, Luis Fernando Alzuguir Azevedo
Presenter: Guilherme Moreira Bessa
doi://10.26678/ABCM.ENCIT2018.CIT18-0307
Abstract
Aortic stenosis (AS) is the most common valve disease. Transcatheter Aortic Valve Implantation (TAVI) has become the preferred treatment for high-risk or inoperable patients with severe aortic stenosis that could be a life-threatening condition when left untreated. Due to the nature of the TAVI procedure, a variability on the tilt angle of the deployed valve is expected. The present work, investigated the effects on the flow field in the ascending aorta due angle variation of the prosthetic valve effective orifice. Understanding the hemodynamic patterns of blood flow in the ascending aorta is important because they are closely related to the development of cardiovascular diseases. To this end, a patient-specific vascular phantom was produced by a 3D printed model and transparent silicon resin. A special setup was designed to allow measurements of the 3D flow at different cross sections of the aorta. A stereoscopic particle image velocimetry system (stereo-PIV) was implemented to yield instantaneous and averaged turbulent flow information. Preliminary results obtained indicate that the velocity field in the ascending aorta is strongly affected by the inlet flow direction into the aorta.
Keywords
Transcatheter Aortic Valve Replacement, Stereoscopic PIV, In vitro patient-specific phantom, Turbulent flow
