a) Transverse view of common carotid artery (CCA) and internal jugular vein (IJV) with a microconvex probe in the right carotid triangle. (b) Right supraclavicular view: superior vena cava (SVC), ascending aorta (AAsc), right pulmonary artery (RPA), scale in cm. Note body mark for position of the ultrasound probe. (c) SVC with J tip of the guide wire. (d) Postoperative chest radiograph with indwelling central venous catheter (CVC) in SVC.