Abstract: Electrical impedance tomography (EIT) is a non-invasive imaging technique that generates cross-sectional images of chest by measuring changes in impedance as electric currents passing through human body. In perioperative respiratory management, EIT provides a real-time, consecutive monitoring of lung ventilation and perfusion status, guiding respiratory management of perioperative patients including medication for COPD and asthma, personalized PEEP settings for specific patient populations, lung protection for pediatric perioperative cases, and predicting postoperative pulmonary complications. Application of EIT in the perioperative period helps clinicians to manage patient respiratory status more accurately, reduces complications and improves outcomes. Through real-time monitoring and individualized treatment guidance, EIT enhances the safety and effectiveness of perioperative respiratory management, becoming an essential part of the operating room. This review summarises the application of EIT in the perioperative period, aiming to provide reference for the clinical application of EIT.

Key words: electrical impedance tomography, perioperative period, respiratory management