Impact of ECMO Cannula Chlorhexidine-impregnated Dressings to Decrease Extracorporeal Membrane Oxygenation-cannula Related Infection Rate

Inclusion Criteria: * Patients with cardiogenic shock or refractory acute respiratory distress syndrome ECMO VA or VV ECMO for less than 24 hours. * ECMO duration \> 48 hours * Obtained written informed consent from the trusted person or family member/relative. Depending on the emergency consent, randomization may take place and consent of the trusted person/relative/family will be obtained as soon as possible. The patient will be asked to give his/her consent for the continuation of the trial when hid/her condition will allow. * Affiliation to a social security system (excluding state medical aid) Exclusion Criteria: * Age \<18 years * Initiation of ECMO for more than 24 hours * Surgical (i.e. non percutaneous) cannulation * Patient moribund on day of randomization, SAPS II \>90 * Known allergy to chlorhexidine * Antibiotic prophylaxis at ECMO cannulation