How common is pseudoaneurysm?

How Common Is Pseudoaneurysm After Catheterization?

When it comes to medical procedures involving the femoral artery—like cardiac catheterization—doctors are trained to minimize risks, but complications can still occur. One such complication is a pseudoaneurysm, which happens when there's a small tear at the puncture site, causing blood to leak into the surrounding tissue and form a bulge. Unlike a true aneurysm, this pocket is not contained by all layers of the artery wall, making it more unstable.

Pseudoaneurysms are considered a relatively common iatrogenic (doctor-induced) complication following procedures that require femoral access. While most cases are minor and resolve on their own, they can sometimes lead to pain, swelling, or more serious issues if left untreated.

The exact incidence varies widely across studies—anywhere from 0.05% to 14% of patients undergoing catheterization. This broad range reflects differences in technique, patient factors (like anticoagulant use), and how diligently pseudoaneurysms are monitored and reported. Advances in procedural methods, such as using closure devices or ultrasound guidance, have helped lower the rates in recent years.

Still, because catheterization is performed so frequently—especially in cardiology—pseudoaneurysms remain a notable concern. Most are diagnosed with ultrasound and managed conservatively or through minimally invasive treatment. Awareness among clinicians and early detection are key to preventing complications.

While not every patient needs to worry, it’s a reminder that even routine procedures carry some risk. The good news? With modern techniques and vigilant follow-up, the vast majority of pseudoaneurysms are manageable and rarely lead to serious harm.