Non-intensive care unit feasibility for ambulatory veno-venous extracorporeal membrane oxygenation patients

Introduction: Veno-venous extracorporeal membrane oxygenation has increasingly been utilized to support patients in respiratory failure as a bridge to recovery or lung transplantation. As patients progress from cannulation to recovery or transplantation, it has been shown that physical therapy and ambulation are possible and beneficial for patient outcomes. Methods: We sought to evaluate the feasibility of managing these ambulatory VV-ECMO patients in a non-ICU setting by conducting a single-center, retrospective cohort study to characterize the daily data collection (i.e., CXRs, blood draws, etc.) and ICU and ECMO interventions and events (i.e., oxygenator/cannula exchange, sweep or flow adjustments, etc.). Results: A total of 28 ECMO runs from patients ≥18 years of age who ambulated ≥100 feet while on VV ECMO between 2014 and 2020 were included for analysis. Patients were supported on ECMO a median of 33 [18-79.5] days with a mean of 4.0 (3.8,4.1) data collections per day. There was a mean of 1.1 (1.0,1.2) anticoagulation changes, 1.5 (1.4,1.6) ECMO interventions, and 0.40 (0.34,0.46) ICU interventions per day. There were very few instances of cannula repositioning or oxygenator exchanges - 0.05 (CI 0.04, 0.06) per day. Conclusion: Our data suggests that ambulatory VV-ECMO patients may tolerate less than ICU level of care and may even progress to outpatient management as ECMO technology continues to advance.