Non-invasive methods of <i>in vivo</i> functioning analysis of the “TiAra” stentless valve prosthesis

Highlights . Non-invasive method for the assessment of mobility and deformation wire element bioprosthesis in cardiac cycle based on developed mathematical algorithm is presented. Numerical analysis behavior “TiAra” shown first time. The can be used other medical devices as well. Aim To develop a non-invasive aortic heart valve processing visual data. Methods Multidetector computed tomography data patient P. (male, 66 years old), who received (NeoCor CJSC, Kemerovo), were study. Using built-in tools Mimics Medical Image Processing Software (Materialize, Belgium), radio density, 5 stages movement reconstructed form 3D-models. differences between models, characterizing cycle, quantitatively assessed using proprietary Matlab (The MathWorks, USA), calculating distance similar points. Moreover, obtained displacements was numerical study stress-strain state 3D-model by finite Abaqus/CAE software (Dassault Systèmes SE, France). Results proposed assessing made it possible to evaluate biomechanics stentless multidetector tomography, clinical tool. movements that undergoes during (the maximum value 2.04 mm radial direction) are comparable root healthy patient. results modeling stress did not indicate high amplitudes (peak – 564 MPa) would capable causing critical damage wire. It allows us confirm safety real conditions like asymmetric uneven loads. deformations observed amplitude described literature, which highlights main feature ensuring physiological throughout cycle. Conclusion presented qualitative computer prosthesis an example demonstrates its validity tool studying functioning.