MATERIALS AND METHODS
It’s an observational study including 29 patients undergoing cardiopulmonary bypass for cardiac surgery at the ‘Città della Salute e della Scienza’ University Hospital in Turin (Italy) between March and June 2021. The present study was approved by local Ethics Committee (local Ethics Committee approval number 585/2020, January 18th, 2021). All patients included signed the informed consent for the present study. Patients not providing written consent to data analysis, with an age lower than 18, with history of hematological or hepatic pathologies, undergoing urgent surgery or re-operations, or with an ejection fraction <25% were excluded.