Thoracic cavity electrical impedance simulation method based on human tissue conductivity refined modeling design

Abstract

The invention relates to a thoracic cavity electrical impedance simulation method based on human tissue conductivity refined modeling design, and belongs to the technical field of medical detection. According to the method, classification modeling is performed according to cell composition, components and conductivity of each tissue of the thoracic cavity, simulation excitation source parameters and electromagnetic field constraint conditions, field domain equations and boundary conditions of each region are determined, a thoracic cavity mathematical physical model is constructed in a partitioned manner, and then a finite element simulation method is utilized to realize construction of a thoracic cavity simulation model. Simulation experiment analysis and various parameter tests are carried out, and the change relation between lung air parameters and thoracic cavity electrical impedance simulation values is determined. According to the invention, the detection situation of the actual thoracic cavity electrical impedance can be well simulated, the electrical characteristics and various parameters of each part of the thoracic cavity can be effectively reflected according to the excitation signal, a theoretical basis is provided for subsequent related thoracic cavity electrical impedance measurement and lung function detection, namely lung respiratory capacity detection experiments, and the invention has high reference and guidance values.

Description

technical field [0001] The invention belongs to the technical field of medical detection, and relates to a chest cavity electrical impedance simulation method based on fine modeling and design of human tissue conductivity. Background technique [0002] In the prior art, there are two main methods for common pulmonary function testing schemes: the first is the volumetric measurement type, the instrument measures the gas volume change of the buoy or piston cavity connected to the respiratory tract of the tester, so as to realize the measurement of the lung gas volume. The detection of the change rule; the second is the flow measurement type, the instrument measures the gas flow through a certain cross-sectional area, and then integrates the time to obtain the volume of the breathing gas, so as to realize the detection of the change of the lung gas volume. [0003] Both of the above two detection methods have some problems that cannot be ignored: [0004] 1) When a volumetri...

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Problems solved by technology

[0007] In view of this, the purpose of the present invention is to provide a thoracic electrical impedance simulation method based on refined modeling and design of human tissue conductivity, aiming at the high detection cost, high risk of cross-infection and single mode of existing lung function detection technology. In order to solve problems such as chemical measurement, build a thoracic electrical impedance circuit model in different regions, determine the relationship between the electrical characteristics of the thorax and the air volume in the lungs, and build a mathematical physical model for the calculation of electromagnetic properties on the basis of establishing a detection method for the thoracic cavity. , and build a thorax simulation model to reflect the specific lung electric field distribution in real time

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