endoleak
Pronunciation: EN-do-leak
Persistent blood flow outside a stent graft but within the aneurysm sac after endovascular repair.
Full Definition
An endoleak is a complication of endovascular aneurysm repair (EVAR) characterized by continued blood flow into the aneurysm sac outside the stent graft. Endoleaks are classified into five types based on their source: Type I (attachment site leak), Type II (branch vessel backflow), Type III (graft defect), Type IV (graft porosity), and Type V (endotension). Detection and classification of endoleaks is crucial in post-EVAR surveillance as they can lead to continued aneurysm expansion and potential rupture. CT angiography is the primary imaging modality for endoleak detection and characterization.
Usage
Usage note: Always specify the endoleak type (I-V) when documented.
In Context
- "A Type II endoleak was identified on the six-month post-EVAR CT scan." — Vascular surgery follow-up report
- "The patient required intervention for a high-flow Type I endoleak." — Interventional radiology consultation