Endovascular repair of abdominal aortic aneurysm
Endovascular repair of abdominal aortic aneurysm (EVAR) is performed under digital subtraction angiography (DSA) dynamic monitoring. Typically, a self-expanding nitinol stent with coated wall is delivered through an incision in the femoral artery. This stent is anchored to the proximal and distal region of the aneurysm and prevents the blood flow from further expanding the wall of the diseased vasculature.
EVAR is a minimally invasive surgery technique that require less surgical trauma, providing treatment for many high-risk patients who cannot tolerate surgery. The method is limited by the anatomical conditions of the aneurysm body and cannot be applied in patients with renal insufficiency or contrast agent allergy. In addition, serious side effects may result from internal leakage, which could lead to the transition to open surgery. The long-term changes of morphology, structure, and location of these stent-modified vessels also need to be further observed.
