Method for calculating odd vein shunt ratio in semi-ventricular model based on geometric multi-scale model

A calculation method, azygos vein technology, applied in the direction of calculation, 3D modeling, image data processing, etc., can solve the problems of instrument error, patient discomfort, magnetic resonance operation, high medical cost of patients, etc., to achieve the effect of convenient change
CN110457765AActive Publication Date: 2019-11-15BEIJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF TECH
Publication Date
2019-11-15

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Abstract

The invention relates to a method for calculating an odd vein shunt ratio in a semi-ventricular model based on a geometric multi-scale model, and belongs to the field of hemodynamic numerical simulation. A 0D / 3D coupled geometric multi-scale model is used for carrying out hemodynamic finite element analysis to acquire the odd vein shunt ratio. A semi-ventricle model is represented by a 3D model, and a peripheral circulation part connected with the semi-ventricle model is represented by a 0D lumped parameter model, so that a 0D / 3D combined geometric multi-scale model is formed. Finite element analysis is applied to the 0D / 3D coupling model, and the hemodynamic condition of one semi-ventricular model under different pulmonary resistances is simulated. After calculation is completed, in ANSYS-CFX post-processing, the odd vein shunt ratio is calculated by defining an expression; and the wall shear stress of the odd vein can be extracted, and the reasonability of the odd vein shunt ratio isevaluated from the biomechanics perspective.
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Description

technical field

[0001] The present invention provides a method for calculating the azygos shunt ratio in a semi-ventricular model based on a geometric multi-scale model, which is defined as formula (1),

[0002]

[0003] It belongs to the field of hemodynamic calculation. Background technique

[0004] Studying the shunt ratio of the azygos vein in a hemiventricular model is important for understanding right heart futile circulation. Most of the studies are based on ultrasound and magnetic resonance imaging to obtain the azygos shunt ratio. Although this method can quickly obtain the flow velocity of each blood vessel through imaging equipment, the instrument itself has certain errors; secondly, the medical expenses are relatively large for patients, and some patients are not suitable for magnetic resonance operations. Now using a geometric multi-scale model, using finite element analysis, not only can change the inner diameter of the azygos vein in the 3D model, but als...

Claims

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