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Background: The combination of prone positioning and extracorporeal membrane oxygenation (ECMO) in patients with acute respiratory distress syndrome (ARDS) is recognized as safe but its use has been limited due to potential complications. Aim: To report the prevalence of pressure ulcers and other complications due to prone positioning in adult patients receiving veno–venous ECMO. Study Design: This cross‐sectional study was conducted in a tertiary level intensive care unit (ICU) in Milan (Italy), between January 2015 and December 2019. The study population was critically ill adult patients undergoing veno–venous ECMO. Statistical association between pressure ulcers and the type of body positioning (prone versus supine) was explored fitting a logistic model. Results: In the study period, 114 patients were treated with veno–venous ECMO and 62 (54.4%) patients were placed prone for a total of 130 prone position cycles. ECMO cannulation was performed via femoro–femoral configuration in the majority of patients (82.4%, 94/114). Pressure ulcers developed in 57.0% of patients (95%CI: 44.0%–72.6%), most often arising on the face and the chin (37.1%, 23/62), particularly in those placed prone. The main reason of prone positioning interruption was the decrease of ECMO blood flow (8.1%, 5/62). The fitted model showed no association between body position during ECMO and occurrence of pressure ulcers (OR 1.3, 95%CI: 0.5–3.6, p =.532). Conclusions: Facial pressure ulcers were the most frequent complications of prone positioning. Nurses should plan and implement evidence‐based care to prevent such pressure injuries in patients undergoing ECMO. Relevance to Clinical Practice: The combination of prone positioning and ECMO shows few life‐threating complications. This manoeuvre during ECMO is feasible and safe when performed by experienced ICU staff. [ABSTRACT FROM AUTHOR]