The central line is outlined for you here. The portion of the tubing that is outside the patient (lying on their skin) is shown in yellow. The portion that is INSIDE the patient is shown in green. What vessel was entered first? Do you think the line is going in the intended direction (into the superior vena cava)?

The point at which the catheter enters the skin is at the junction of the yellow and green outlines. Use the bony landmarks to help you decide where this is on the patient's body.