 Wound closure is achieved by a two-layer technique using continuous absorbable loop suture. The suture length to incision length ratio is at least 4:1. The running sutures are 1 cm apart and at least 1.5 cm from the wound edge 14. In the first timeperiod TP1, the CP step for fascia closure foresees a PDS loop suture PDS II, 150 cm, Ethicon GmbH, Norderstedt, Germany. After the recruitment of 400 patients, that CP step is altered to the use of a triclosan-coated polyglactin 910 loop suture Vicryl plus, 150 cm, Ethicon GmbH, Norderstedt, Germany. The primary outcome is the number of wound infections. Patients demographic and disease as well as procedure related data are collected in a clinical information system ISHmed on SAP platform, GSD, Berlin, Germany prospectively. Risk factors for poor wound healing, such as operation time, patients age, sex, body mass index, blood loss, peritonitis, antibiotics, and performance level classified according to the American Society of Anesthesiologists ASA, are collected prospectively to compare the two groups. 