Pseudoaneurysms less than 2 cm can be managed conservatively and monitored with serial imaging to confirm spontaneous resolution.
For larger pseudoaneurysms treatment options include direct ultrasound-guided compression or ultrasound-guided local injection of thrombin or collagen. However, surgical management is recommended if the pseudoaneurysm is expanding rapidly or causing skin necrosis.
Source
Carrozza, J. "Complications of diagnostic cardiac catheterization" Up to Date. Sept 2010.
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