Aortic fenestration is a surgical procedure in which small openings (fenestrations) are created in the aortic wall to improve blood flow in cases of aortic dissection or aneurysm. The procedure is typically performed to prevent rupture of the aorta and to restore blood flow to important branches of the aorta, such as those supplying the kidneys or spinal cord.

Aortic fenestration is an important procedure for stabilizing patients with aortic dissections or aneurysms, preventing further damage and reducing the risk of fatal complications.