What size pseudoaneurysm is considered problematic?

What size pseudoaneurysm is considered problematic?

• A. 0.5 cm
• B. 0.75 cm
• C. 1.0 cm
• D. >1 cm

Answer: (D)

Size is a key factor in deciding management of a post-procedure pseudoaneurysm. Smaller PSAs are more likely to thrombose on their own or with brief ultrasound-guided compression, so they’re often observed without aggressive intervention. When the sac reaches about one centimeter or larger, the chance of persistent flow, growth, or rupture increases, making spontaneous resolution less likely and treatment more appropriate. In practice, pseudoaneurysms over 1 cm are considered problematic and commonly managed with procedures such as ultrasound-guided thrombin injection or longer compression to promote closure.

Size is a key factor in deciding management of a post-procedure pseudoaneurysm. Smaller PSAs are more likely to thrombose on their own or with brief ultrasound-guided compression, so they’re often observed without aggressive intervention. When the sac reaches about one centimeter or larger, the chance of persistent flow, growth, or rupture increases, making spontaneous resolution less likely and treatment more appropriate. In practice, pseudoaneurysms over 1 cm are considered problematic and commonly managed with procedures such as ultrasound-guided thrombin injection or longer compression to promote closure.