Experimental study on effect of body position on lung ventilation determined by electrical impedance tomography
10.7687/j.issn1003-8868.2018.04.006
- VernacularTitle:基于EIT技术监测体姿改变对肺通气影响的实验研究
- Author:
Chao ZHANG
1
;
Jia-Ming WU
;
Meng DAI
;
Jun-Ying XIA
;
Feng FU
;
Fu-Sheng YOU
Author Information
1. 空军军医大学军事生物医学工程学系
- Keywords:
electrical impedance tomography;
body position;
lung ventilation volume;
lung flow rate;
forced vital capacity;
gravity dependence
- From:
Chinese Medical Equipment Journal
2018;39(4):6-10
- CountryChina
- Language:Chinese
-
Abstract:
Objective To monitor and compare the effects of body position on the regional lung volume and FEV1/FVC with electrical impedance tomography(EIT).Methods Twelve healthy young subjects[(26.6±2.5)yr]were detected by EIT during FVC maneuver in 3 body positions (sitting,supine and prone).Functional EIT images of FVC and FEV1/FVC were obtained;the proportion of regional ventilation volume and the mean of regional FEV1/FVC were calculated.Results The ventral and dorsal proportion of ventilation volume was 37.65% : 62.35% in sitting position and 37.59% : 62.41% in supine position, respectively.While in the prone position,the value was 48.56%:51.44%,which was close to 1:1.The mean of regional FEV1/FVC in the dependent lung region was 0.84 in supine position and 0.81 in prone position,while in sitting position,the corresponding value was 0.90 and 0.94, respectively. Conclusion The results shows that the ventilation transfers to the gravity dependent region obviously, while the flow rate decreases. The result provides direct evidences for mechanical ventilation patients using prone position to improve oxygenation,as well as a research foundation for EIT monitoring regional lung ventilation in the clinical setting.
