Inclusion Criteria:  Patient Consent Age between 40 and 85 years old Patients undergoing Elective Open Abdominal Aortic Infrarenal Aneurysm Repair AAA Diameter ≥ 5,0 cm  Exclusion Criteria:  Immunocompromised patients Patients with active infection Reoperation on the aorta Inflammatory bowel Disease Malignancy Chronic Inflammatory conditions (e.g. Rheymatoid arthritis, Psoriatic arthritis) Chronic corticosteroid or immunosuppressive drug use Transfusion with >3 units of packed red blood cells