Blood pressure calculation method and device based on cross-scale fluid-solid coupling and considering aorta nonlinear biomechanical characteristics

By combining a zero-dimensional lumped parameter model of the heart and a three-dimensional aortic model with a cross-scale fluid-structure interaction method, the problem of low accuracy and efficiency in blood pressure calculation in existing technologies has been solved, enabling high-precision assessment of postoperative complications of aortic surgery and optimization of treatment plans.

CN122113724APending Publication Date: 2026-05-29TIANJIN UNIV +2
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Patent Information

Application Number
CN202610094828.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-23
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing blood pressure calculation technologies suffer from low accuracy and efficiency in assessing complications after aortic surgery, especially in scenarios involving non-steady-state blood flow and cardiac work assessment, where they struggle to meet the demands for high accuracy and efficiency.

Method used

A cross-scale fluid-structure interaction method was adopted, combining a zero-dimensional lumped parameter model of the heart, a zero-dimensional ternary Windkessel model, and a three-dimensional aortic model. Considering the nonlinear biomechanical characteristics of the aorta, the bidirectional energy feedback and blood circulation simulation between the heart and the aorta were realized by establishing the pressure-radius relationship of the aortic wall.

Benefits of technology

It improves the accuracy and efficiency of blood pressure prediction, accurately reflects the hemodynamic characteristics of the heart during systole and diastole, assesses cardiac work, and optimizes aortic treatment plans.

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Abstract

The invention discloses a blood pressure calculation method and device based on cross-scale fluid-solid coupling and considering aorta nonlinear biomechanical characteristics. The method comprises the steps that a three-dimensional ideal aorta geometric model is established; a zero-dimensional heart lumped parameter model is established, and the process that the heart pumps blood to the aorta inlet through periodic contraction and relaxation is simulated; establishing a zero-dimensional ternary Windkessel model of the arteriole to simulate the blood flow microcirculation of the peripheral arteriole; establishing a vascular wall biomechanical model containing aortic wall residual stress and active contraction effect of smooth muscle cells, obtaining a pressure-radius relationship of the aortic wall, and simulating a change process of the aortic radius in blood circulation by taking the pressure-radius relationship as a fluid wall surface boundary condition; the three-dimensional ideal geometric model of the aorta, the zero-dimensional heart lumped parameter model and the zero-dimensional ternary Windkessel model are coupled, a hemodynamics cross-scale fluid-solid coupling system is constructed, and the blood pressure in the aorta is obtained through iterative solution calculation.
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