Antibiotics Distribution Study in Peripheral Compartments: Contribution of Microdialysis

Inclusion Criteria: * Child aged over 6 months and under 6 years * Hospitalized in pediatric cardiac intensive care after cardiac surgery for congenital heart disease. * Selected congenital heart diseases: ventricular septal defect auricular septal defect, pulmonary stenosis, tetralogy of Fallot * Surgery with median sternotomy and intraoperative cardiopulmonary bypass * Intraoperative antibiotic prophylaxis with cefazolin * Patient affiliated with a social security plan or eligible * whose two parents or legal guardians have accepted and signed the study consent Exclusion Criteria: * Emergency cardiac surgery * Patient already enrolled in the study * Patient who has previously undergone cardiac surgery * Patient with haemostasis disorders or immune deficiency * Patient with bacterial colonization indicating antibiotic prophylaxis other than cefazolin * Participation in another interventional research study