Development of a method for estimating local material properties of arterial walls from non-invasive in-vivo measurements
Development of 3D numerical model of blood flow within a deforming vessel
Comparison with existing 1D model developed by NTNU
Increasing arterial stiffness leads to a change in the behaviour of the reflected wave. The reflected wave returns to the heart at a shorter time then in healthy subjects.
vanVarik BJ, Rennenberg RJMW, Reutelingsperger CP, Kroon AA, deLeeuw PW and Schurgers LJ (2012) Mechanisms of arterial remodeling: lessons from genetic diseases. Front.Gene. 3:290
This return usually collides with systole which leads to superposition of the reflected and outgoing wave yelding higher pressure than in healthy subjects. Such reinforced waves also make their way to delicate organs potentially causing damage.
Left Common Carotid Artery
The left common carotid artery is the longest branch of the aortic arch. It is a large and elastic channel that arises in the thorax from the arch of the aorta. It can be used to measure the pulse.
Some cardiovascular diseases may locally change the stiffness of the arteries – a stronger spatial variation in the distensibility of the carotid has been shown in hypertensive patients compared to healthy subject.
Although the changes in the stiffness of the vascular system with age affect the whole vasculature, arteries at different sites respond differently to aging, hypertension, and pregnancy.
Methods of non-invasive evaluation of the local stiffness are often of interest in diagnostics of the arterial system.
Therefore, assessment of the stiffness of the arterial system is a valuable diagnostic index, it serves as a predictor of cardiovascular diseases.
Project has been divided into 6 work packages (WPs):
WP 1 Physical experiment
WP 2 Direct models (1D STARFiSh and 3D CFD), comparison of solutions
WP 3 Validation, sensitivity analysis and uncertainty quantification
WP 4 Inverse analysis applied to the results of the physical experiment
WP 5 Medical experiment
WP 6 Inverse analysis of medical data
Inverse analysis of medical data
The experiments concerning the stiffness of the deformable artery imitation will be accompanied by an extensive numerical analysis involving methods used in inverse problems.
The numerical procedure will be built using data collected from the experiments and it will be subsequently used to obtain a reduced-order model that will try to recapture the complexity of the artery’s behaviour, while remaining computationally cost-efficient.
Experimental site will be prepared in the form of an aquarium filled with ballistic gel.
The final stage of the project will involve USG measurements performed on live subjects (healthy volunteers) that will be carried out in Gliwice Municipal Hospital Number 4 under supervision of Adam Golda, M.D.
Our cooperation was possible thanks to Norway grants which funded 85% of project budget and to Polish government which supported project by funding 15% of total budget.
Thanks to them, it was possible for us to arrange our consortium which is combination of some very talented and highly specialised crews from:
Norwegian University of Science and Technology (NTNU)
Division of Biomechanics
Gliwice Municipal Hospital No 4 (GMH)
Department of Cardiologye and Technology (NTNU)
October 1st, 2020 – September 30th, 2023
Total budget granted