Outcomes of extracorporeal membrane oxygenation in acute respiratory distress syndrome due to COVID-19: The lessons learned from the first wave of COVID-19

Introduction: Extracorporeal membrane oxygenation (ECMO) has been used as a refractory treatment for acute respiratory distress syndrome (ARDS) due to coronavirus disease 2019 (COVID-19), but there has been little evidence of its efficacy. We conducted this study to share our experience using ECMO as a bridge to recovery for ARDS due to COVID-19.

Methods: All adult patients who were placed on ECMO for ARDS due to COVID-19 between April 2020 and June 2020 (during the first wave of COVID-19) were identified. The clinical characteristics and outcomes of these patients were analyzed with a specific focus on the differences between patients who survived to hospital discharge and those who did not.

Results: In total, 20 COVID-19 patients were included in this study. All patients were placed on veno-veno ECMO. Comparing survivors and non-survivors, older age was found to be associated with hospital mortality (p = .02). The following complications were observed: renal failure requiring renal replacement therapy (35%, n = 7), bacteremia during ECMO (20%, n = 4), coinfection with bacterial pneumonia (15%, n = 3), cannula site bleeding (15%, n = 3), stroke (10%, n = 2), gastrointestinal bleeding (10%, n = 2), and liver failure (5%, n = 1). The complications associated with patient mortality were culture-positive septic shock (p = .01), culture-negative systemic inflammatory response syndrome (p = .01), and renal failure (p = .01). The causes of death were septic shock (44%, n = 4), culture-negative systemic inflammatory response syndrome (44%, n = 4), and stroke (11%, n = 1).

Conclusions: Based on our experience, ECMO can improve refractory ARDS due to COVID-19 in select patients. Proper control of bacterial infections during COVID-19 immunomodulation therapy may be critical to improving survival.