CTICasesIatrogenic Subclavian Arterial Line Placement
Imaging findings
Chest radiograph shows a central venous port catheter that goes above the clavicle, runs along the apex of the right lung, and terminates to the left of the midline, projecting over the aortic knob. CT angiography confirmed placement of the catheter in the subclavian artery.
Key takeaways
Subclavian central line placement can inadvertently result in arterial cannulation. Radiographic clues include the catheter course rising above the clavicle (as the subclavian vein runs inferior and anterior to the artery) and crossing the midline into the descending aorta. Confirmation via blood gas or CT is required before use.
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