Hemodynamic integration in extracorporeal membrane oxygenation anticoagulation

Despite progressive advances in circuit design, material biocompatibility, and anticoagulation monitoring, bleeding and thrombosis remain common during extracorporeal membrane oxygenation and are closely associated with adverse outcomes. Current practice still relies mainly on heparin titration guided by time-based coagulation assays. However, these assays do not fully capture the evolving balance between bleeding and thrombosis in response to inflammation, endothelial injury, nonphysiologic shear, and sustained intervention. We conceptualize extracorporeal membrane oxygenation-associated coagulation imbalance as a dual-hit process, in which the initiating critical illness establishes a vulnerable host baseline and the extracorporeal circuit then superimposes flow- and shear-related injury, continuously reshaping the coagulation microenvironment. On this basis, we propose a bedside multimodal monitoring framework that brings together anticoagulant effects, coagulation substrates, physicochemical prerequisites, mechanical blood injury, and the hemodynamic flow environment, operationalized as a stepwise pathway of trigger events, layered assessment, and intervention direction. Critical care ultrasound serves as the hemodynamic anchor of this framework by linking laboratory abnormalities to the patient’s real-time circulatory state. We also discuss the potential for artificial intelligence to provide adjunctive risk flagging rather than to replace clinical judgment. The framework is intended to help clinicians localize the dominant source of anticoagulation instability and prioritize hemodynamic, substrate, physicochemical, or pharmacologic correction at the bedside.