Preschooler with a catheter that infuses but does not draw back Pediatric Imaging Cardiovascular February 8, 2020January 31, 2020 Scout image from a line study shows migration of the tip of the catheter so that it now lies flush against the lateral wall of the superior vena cava. The diagnosis was occlusion of the catheter tip due to catheter migration. Related Published February 8, 2020January 31, 2020