In this study we evaluate the use of ultrasound as diagnostic modality in patients after CVC placement in the subclavian or jugular vein. This research proposal aims to evaluate US examination as diagnostic tool for misplacement, bleeding and pneumothorax after CVC-placement. Combining the different strategies from previous studies. we developed "tHe UltraSound evaluation of Cvc Insertion" i.e. HUSCI-protocol. Hereby, we aim to improve accuracy The outcome measure will be the sensitivity and specificity of US. In addition, diagnostic concordance between US and CXR in patients after CVC placement will be studied. If US catches clinical relevant findings accurately we can replace standard expensive and harmful CXR as standard diagnostic tool in patients after CVC-placement in the future. We hypothesize that US can confirm correct CVC placement and detect potential associated complications accurately.