Pilot Study on the Effectiveness and Safety of OPTILENE® SILVER MESH ELASTIC in Prevention of Surgical Site Infection (SSI) and Incisional Hernia (IH)

Inclusion Criteria: * Adult patients (18 years or older) * Surgical procedure requiring urgent, primary median laparotomy, which are classified as "Class III/Contaminated" or "Class IV/Dirty-Infected" regarding the CDC classification. These include but are not limited to: * Vascular surgery * Colon and rectum * Hepatobiliary * Gastrointestinal * Gynecology * Urology * Abdominal Aortic Aneurysm (AAA) repair * Right hemicolectomy * Left hemicolectomy * Sigmoidectomy * Anterior resection * Abdominoperineal amputation * Exploratory laparotomy * Cholecystectomy * Cholecystectomy and choledocotomy * Written informed consent Exclusion Criteria: * Pregnancy * Breast feeding * Patients \< 18 years old or patients who are still in the growth phase * Contaminated and infected areas * Hypersensitivity to silver * Direct contact with the viscera * Previous allergic reactions to components of the device * Patient with previous laparotomy * Transverse laparotomy * Patients with previous hernia repair * Simultaneous participation in another investigational clinical trial (drug or medical studies) * Patients with active oncologic treatment (chemo and radiotherapy) * Underlying autoimmune disease * Recent cardiovascular complication * Gynecology surgery * Urology surgery * Vascular surgery