A New Method to Assess the Lung Perfusion Distribution by Electrical
Impedance Tomography Under Mechanical Ventilation
QU Zhihua1,2, DAI Meng1, WU Jiaming1,3, ZHANG Chao1, YOU Fusheng1, FU Feng1
1. College of Biomedical Engineering, Military Medical University of Air Force, Xi’an Shaanxi 710032, China;
2. School of Life Science and Technology, Xidian University, Xi’an Shaanxi 710126, China;
3. NCO Academy, Army Military Medical University, Shijiazhuang Hebei 050081, China
Abstract：Objective To evaluate the lung perfusion function of the intensive patient under mechanical ventilation, this paper
proposed a new assessment method based on contrast agent enhancement by electrical impedance tomography (EIT). Methods
During mechanical ventilation, the ventilator was temporarily set as the breath hold state at the end of exhalation, and 10 mL of
hypertonic saline was injected during this period as contrast agent. The pure lung region of interest was determined by calculating
functional EIT image, then the perfusion was evaluated by the slope of impedance reduction after injecting the agent. Results The
lung and heart perfusion distribution map obtained by the proposed method could objectively reflect the perfusion percentage of
each pixel. Conclusion EIT can be used to evaluate the distribution of lung and perfusion, and provide some valuable diagnostic
information to doctors for improving the effect of mechanical ventilation.
曲志华1,2，代萌1，吴佳铭1,3，张超1，尤富生1，付峰1. 机械通气下肺血流灌注状况的电阻抗断层成像评估新方法研究[J]. 中国医疗设备, 2019, 34(1): 6-9.
QU Zhihua1,2, DAI Meng1, WU Jiaming1,3, ZHANG Chao1, YOU Fusheng1, FU Feng1. A New Method to Assess the Lung Perfusion Distribution by Electrical
Impedance Tomography Under Mechanical Ventilation. China Medical Devices, 2019, 34(1): 6-9.
