A consensus of international experts on definition, sampling, treatment, and prevention of peripheral extracorporeal membrane oxygenation cannula-site infection obtained by the Delphi method: the SAVECMO study

Background: Nosocomial infections are common in patients receiving extracorporeal membrane oxygenation (ECMO), with ECMO cannula-site infections (ECMO-CSI) being the most frequent infections directly related to the ECMO run. These infections can significantly impact patient outcomes. Currently, no adult guidelines exist for the prevention, diagnosis, and/or treatment of peripheral ECMO-CSI, resulting in heterogeneity in both clinical practice and research findings. Methods: We conducted a Delphi study involving 39 international experts in ECMO management. The experts participated in four Delphi rounds to reach consensus on various aspects of ECMO-CSI complicating peripheral ECMO (central ECMO excluded), including definition, clinical suspicion, diagnostic methods, preventive measures, and treatment. Consensus was defined as ≥ 70% agreement among experts on each proposed item. Results: The Delphi process established consensus on key aspects of ECMO-CSI. Experts agreed on clinical scenarios that warrant suspicion of ECMO-CSI, such as purulent discharge and local inflammatory signs. Standardized sampling techniques, including swabs and purulent drainage aspiration, were recommended, while others were rejected. Definitions were clarified, specifying that ECMO-CSI is defined by the isolation of a pathogen through local microbiological sampling and the presence of purulent discharge or local inflammatory signs. Among the preventive measures, the use of chlorhexidine-impregnated or semipermeable polyurethane dressings, unchanged for 7 days unless soiled or bleeding, was recommended, whereas systematic antibiotic prophylaxis, even for surgical ECMO, was not recommended. Conclusion: This study presents an international expert consensus focusing on peripheral ECMO-CSI, providing a standardized framework to improve clinical management and facilitate future research. The consensus aims to enhance patient outcomes and support evidence-based guidelines in this complex field.