As the name indicates, cricosternal distance is the distance between lower border of cricoids cartilage and sternum. On average, it is approximately width of three fingers. Tracheal Tug, also called Oliver’s sign, is a tracheal abnormality. Tracheal Tug occurs during systole forming a downward movement of trachea which indicates presence of aneurysm or abnormal dilatation. People suffering from Tracheal Tug have a sucked-in feature in the front of their neck. Such people appear bluish or grey around lips and nose.