Study of Immunity Dysfunction Induced by Extracorporeal Assistance (ECMO / ECLS)

Inclusion Criteria: * Patient older than 18 years old * Patient hospitalized in an intensive care unit * Patient whose initial ARDS or Cardiogenic shock began less than 5 days before admission * Patients hospitalized for ARDS or Cardiogenic shock with ECMO / ECLS or - Patients hospitalized for ARDS or Cardiogenic shock without ECMO / ECLS Exclusion Criteria: * Opposition of patient, relative or legal representative for participation in the study * Pregnant woman * Pre-immunodepression * Implementation of immunosuppressive therapy such as chemotherapy, cyclophosphamide, high-dose corticosteroids (\> 0.5mg / kg / day).