EIT-based study of lung ventilation and perfusion regional distribution and ventilation/perfusion matching in different body positions
10.19745/j.1003-8868.2024084
- VernacularTitle:基于EIT的不同体位下肺通气、肺灌注区域分布和通气/灌注匹配研究
- Author:
Ti-Xin HAN
1
,
2
;
Yi-Fan LIU
;
Meng DAI
;
Pu WANG
;
Jian-An YE
;
Zhi-Bo ZHAO
;
Zhan-Qi ZHAO
;
Feng FU
Author Information
1. 空军军医大学军事生物医学工程学系,西安 710032
2. 陕西省生物电磁检测与智能感知重点实验室,西安 710032
- Keywords:
electrical impedance tomography;
changes of body position;
pulmonary ventilation;
pulmonary perfusion;
venti-lation/perfusion matching
- From:
Chinese Medical Equipment Journal
2024;45(5):1-7
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare regional pulmonary ventilation and perfusion and ventilation/perfusion(V/Q)matching in different body positions using electrical impedance tomography(EIT).Methods Ten healthy experimental pigs were selected to collect their EIT lung ventilation and perfusion data in supine,prone,left lateral and right lateral positions.The EIT data underwent analysis and image reconstruction using MATLAB R2022b and EIDORS v3.9.The effective regions with ventilation and perfusion were determined and the V/Q matching regions were computed with the maximum pixel value 20％as the threshold.Comparisons were carried out over the V/Q matching indexes including V/Q match％,dead space％and shunt％and ventilation and perfusion distribution in regions of interest(ROIs)including ROI1,ROI2,ROI3 and ROI4 in different body positions.Results The differences in V/Q match％,dead space％and shunt％of the experimental animals in varied positions were not statistically significant(P＞0.05).The regional distribution of pulmonary ventilation and perfusion changed in different positions,and the regional distributions differed in ROIl,ROI2 and ROI3 for ventilation(P＜0.05)and in ROI1 and ROI2 for perfusion(P＜0.05).The ventilation and perfusion regions were distributed consistently with the gravity-dependent areas in supine and prone positions whereas conversely in the right and left lateral positions.Conclusion The V/Q matching indexes of one subject have high test consistency in different body positions;gravity-dependent areas varied with the changes of the body positions,which affected the distribution of pulmonary ventilation and perfusion regions;EIT can be used for measuring the changed pulmonary ventilation and perfusion due to different positions and determining the influences of position changes on pulmonary ventilation and perfusion and V/Q matching.[Chinese Medical Equipment Journal,2024,45(5):1-7]
