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A pseudoaneurysm or a false aneurysm is a hematoma that forms outside the wall of an artery, due to a leaking hole in the artery. This is different from a true aneurysm which is a collection of blood between the layers of the arterial walls.

Small pseudoaneurysms may clot spontaneously, while others require treatment.

Surgery is often recommended in these cases. A non-invasive treatment is Ultrasound Guided Compression or UGC, which is technically simple and cost effective. This is a technique to manually compress the hematoma.

Percutaneous thrombin injection, given under sonographic guidance are also used to compress the pseudoaneurysms and achieve thrombosis of the blood. Thrombin is a potent, natural coagulant.

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