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Extracorporeal membrane oxygenation for the treatment of ARDS in Covid-19 and influenza patients: Does etiology matter?

At the beginning of the COVID 19 pandemic, the outcome of patients treated with ECMO was discouraging. Subsequently, it became clear that a certain group of patients may benefit from ECMO treatment. The primary objective of this study was to compare the outcome of ECMO treatment in COVID- 19 and influenza patients referred to a tertiary care center. A total of 119 adult patients required ECMO treatment following ARDS secondary to H1N1 (49) and SARS-CoV-2 (70) in the referral ECMO Center based in Zagreb between October 2009 and October 2021. Our study revealed a significantly higher mortality in COVID-19 patients compared to H1N1 influenza when the onset of ARDS was severe enough to require ECMO support. Based on these results and current knowledge, we argue that ECMO treatment for ARDS in COVID-19 patients is more challenging compared to H1N1 influenza patients. Therefore, referral to the most experienced ECMO centers should be considered. Additionally, patient selection and timing for ECMO treatment play a key role in relation to outcome. Mortality rate in COVID-19 patients requiring ECMO treatment may be used as a reference frame for ECMO centers to ensure best possible care and outcome.

ARDS ; COVID 19 ; ECMO ; influenza

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