Fig. 5. Longitudinal ultrasound image of an acute thrombosis of the jugular vein associated with intravenous catheterization. Arrowheads denote the more mature component of the thrombus, with the more recent fibrin deposition denoted by the arrow. For anatomic orientation: proximal is to the right, distal to the left in this image.
eventually focus on the region of interest—a site of swelling adjacent to an intravenous catheter site or a region of swelling from prior intravenous injection. The author finds it most useful to initially evaluate
the vein in a transverse (cross-sectional) plane and then follow with a longitudinal plane, which is use- ful to demonstrate linear anatomic relationships, such as linear extent of a thrombus along the course
Fig. 6. Chronic thrombosed jugular vein. The venous lumen is obliterated by organized fibrous connective tissue with a somewhat laminar appearance.
