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Friday, 15 April 2011

False aneurysm

-Most commonly results from puncture of femoral artery. So mostly iatrogenic in etiology. Can also develope at suture sites following vascular surgery.
-The arterial wall defect results in a pulsatile jet into adjacent tissue.
-The aneurysmal mass seen on the patient consists of a perivascular hematoma that comunicates with the vessel.
-We can induce therapeutic thrombosis in some cases by compressing the region under CDS monitoring. The rate of spontaneous pseudoaneurysm thrombosis is only about 30-58%.
-CDS will show a to and fro pulsed doppler wave form (uniform bidirectional flow at the neck) as seen in the US image above above.
-Main complication is nerve compression.

Other related images:

Blood leaking into surrounding tissue, where an area of decreased echogenicity (hematoma) is seen.

Different types of aneurysms

False aneurysm of the popliteal artery

False aneurysm of the femoral artery, arrow showing point of puncture site.

Cardiac rupture, blood leaking out of LV.


(Text main source: Teaching Manual of CDS-Thieme, Thieme Clinical Companion Ultrasound)
(Images: Pecs University Department of Radiology, google images)

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