학술논문

Investigating the effects of dynamic and static loading on the stability of porcine aorta
Document Type
Conference
Source
2012 38th Annual Northeast Bioengineering Conference (NEBEC) Bioengineering Conference (NEBEC), 2012 38th Annual Northeast. :205-206 Mar, 2012
Subject
Bioengineering
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Signal Processing and Analysis
Robotics and Control Systems
Loading
Arteries
Vehicle dynamics
Mathematical model
Equations
Biomechanics
Language
ISSN
2160-6986
2160-7028
2160-7001
Abstract
Tortuosity of arteries can reduce the blood flow or alter its profile and considered to be a potential source for ischemia in the tissue and atherosclerosis in blood vessels. It adds to the complexity of vascular surgeries and occurs most commonly in arterial grafts. Despite the importance of arterial tortuosity biomechanics of its initiation and development is not well understood. Other studies tried to address the problem with the theory of buckling of beam-columns under static loading however it has been shown theoretically that a dynamic loading can change the buckling behavior of blood vessels and it has been predicted that under dynamic loading the buckling of arteries can occur at lower pressures. This study is a preliminary work to validate this theory by experiment. A porcine descending aorta was assembled in an inflation test set up and internal pressure was increased by two profiles: quasistatic and sinusoidal. The deformation of the artery was captured by 2 high speed cameras in 3D. Buckling in static loading was defined as the sudden change of deflection. The results show that buckling occurs at lower dynamic pressures compared to static loading.