End-Expiratory Lung Impedance Measured With Electrical Impedance Tomography at Different Days Are Not Comparable

1 Department of Critical Care Medicine, State Key Lab of Respiratory Diseases, Guangzhou Institute of Respiratory Health, Guangzhou Medical University, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China 2 Department of Biomedical Engineering, Fourth Military Medical University, Xi’an, China 3 Institute of Technical Medicine, Furtwangen University, VS-Schwenningen, Germany The study was supported by the Emergency Key Program of Guangzhou Laboratory (Grant No. EKPG21-17). Dr. Zhao receives a consulting fee from Dräger Medical. Dr. Sang has disclosed that he does not have any potential conflicts of interest.