Preliminary computational hemodynamics study of double aortic aneurysms under multistage surgical procedures: an idealised model study

TheScientificWorldJournal
Yosuke OtsukiTeruo Matsuzawa

Abstract

Double aortic aneurysm (DAA) falls under the category of multiple aortic aneurysms. Repair is generally done through staged surgery due to low invasiveness. In this approach, one aneurysm is cured per operation. Therefore, two operations are required for DAA. However, post-first-surgery rupture cases have been reported. Although the problems involved with managing staged surgery have been discussed for more than 30 years, investigation from a hemodynamic perspective has not been attempted. Hence, this is the first computational fluid dynamics approach to the DAA problem. Three idealized geometries were prepared: presurgery, thoracic aortic aneurysm (TAA) cured, and abdominal aortic aneurysm (AAA) cured. By applying identical boundary conditions for flow rate and pressure, the Navier-Stokes equation and continuity equations were solved under the Newtonian fluid assumption. Average pressure in TAA was increased by AAA repair. On the other hand, average pressure in AAA was decreased after TAA repair. Average wall shear stress was decreased at the peak in post-first-surgery models. However, the wave profile of TAA average wall shear stress was changed in the late systole phase after AAA repair. Since the average wall shear stress i...Continue Reading

References

Jan 1, 1990·Journal of Vascular Surgery·P GloviczkiH Schaff
Nov 1, 1982·Archives of Surgery·E S Crawford, E S Cohen
May 17, 2005·European Journal of Vascular and Endovascular Surgery : the Official Journal of the European Society for Vascular Surgery·E ChokeM M Thompson
Mar 2, 2006·Cardiovascular and Interventional Radiology·Thomas FrauenfelderSimon Wildermuth
Apr 25, 2006·Biomedical Engineering Online·Feng GaoTeruo Matsuzawa
Jun 1, 2010·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Andreas HarloffMichael Markl

❮ Previous
Next ❯

Software Mentioned

Gambit
Fluent

Related Concepts

Related Feeds

Aortic Aneurysm

An aortic aneurysm is the weakening and bulging of the blood vessel wall in the aorta. This causes dilatation of the aorta, which is usually asymptomatic but carries the risk of rupture and hemorrhage. Find the latest research on aortic aneurysms here.

Cardiac Aneurysm

Aneurysm refers to a bulge of the wall or lining of a vessel commonly occurring in the blood vessels at the base of the septum or within the aorta. In the heart, it usually arises from a patch of weakened tissue in a ventricular wall, which swells into a bubble filled with blood. Discover the latest research on cardiac aneurysm here.

Aneurysm

Aneurysms are outward distensions or bulges that occurs in a weakened wall of blood vessels. Discover the latest research on aneurysms here.

Related Papers

Computer Methods and Programs in Biomedicine
Nenad FilipovicHendrik von Tengg-Kobligk
Mechanics & Chemistry of Biosystems : MCB
Alvaro A Valencia
Journal of Endovascular Therapy : an Official Journal of the International Society of Endovascular Specialists
Barry J DoyleTimothy M McGloughlin
© 2021 Meta ULC. All rights reserved