Background: Central venous catheter (CVC) insertion is a very common procedure in the intensive care setting. A recent international guidelines advocated the use of ultrasound for routine internal jugular CVC insertion. The needle navigation technology is a new innovation, also known as guided positioning system (GPS) which allows clinician to visualize the needle position and trajectory in real time as it approaches the target. We hypothesised that the use of GPS would increase success rate and decrease performance time in vascular access procedures.