Bionecteur® is a protective non-touch applicator to ensure aseptic connection made by Vygon. However, there are no studies describing a positive effect of using Bionecteurs ® in regard to catheter-related bloodstream infections. In this study Bionecteur® will be used on central venous lines and arterial lines in postoperative patients of a 40-bed ICU. The incidence of catheter-related bloodstream infections will we compared to patients without inclusion of Bionecteur® devices.