CTICasesSwan-Ganz Catheter-Induced Pulmonary Artery Pseudoaneurysm
Imaging findings
CT chest shows a Swan-Ganz (pulmonary artery) catheter with its tip positioned too far distally in a right middle lobe subsegmental branch, associated with a focal, enhancing pseudoaneurysm and surrounding alveolar hemorrhage.
Key takeaways
Swan-Ganz catheters must be positioned in a main or lobar pulmonary artery. Over-advancement into small, subsegmental branches can cause mechanical wall laceration or rupture, leading to pseudoaneurysm formation and life-threatening hemoptysis. Radiologists should alert clinicians if the catheter tip is positioned too far distally.
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