A Phase-Based Patient-Safety Approach to Intraoperative Transesophageal Echocardiography in Adult Cardiac Surgery

Patient safety remains a major challenge in cardiac surgery, where cardiopulmonary bypass carries risks of residual structural lesions, hemodynamic instability, embolic events, and unrecognized technical complications. This review examines intraoperative transesophageal echocardiography as a patient-safety intervention across the pre-bypass, bypass, and post-bypass phases of adult cardiac surgery, drawing on observational studies, registry analyses, and professional society guidance. Before cardiopulmonary bypass, transesophageal echocardiography establishes baseline ventricular and valvular function, identifies previously unrecognized pathology, and may guide cannulation and operative planning. During bypass, it supports ventricular decompression, myocardial protection, cannula assessment, and the detection and clearance of intracardiac air. After bypass, it evaluates the adequacy of surgical repair and identifies residual valvular lesions, ventricular dysfunction, ischemia, intracardiac air, and aortic complications while immediate corrective intervention remains possible. Although associated changes in surgical or anesthetic management are consistently reported, their frequency varies according to procedure type, patient risk, institutional practice, and study design. Furthermore, management change is a process outcome and does not, by itself, establish improvement in patient-centered outcomes. Serious complications related to transesophageal echocardiography are uncommon, but safe use requires appropriate patient selection, contraindication screening, careful probe manipulation, standardized examination and communication, and operator competence. A phase-based approach may help surgical teams connect imaging findings with time-sensitive hazards and corrective actions. Further prospective evidence is needed to identify the procedures and patient-risk profiles in which routine rather than selective intraoperative transesophageal echocardiography provides clinically meaningful benefit.