Computational fluid dynamics analysis of the growth process of saccular abdominal aortic aneurysm was performed. A 3D model of aortic aneurysm was created based on CT images. Properties in terms of wall shear stress, mean flow velocity, mean pressure, energy loss, and pressure loss coefficient were calculated using thermal fluid analysis software “ANSYS CFX”. As the aneurysm expanded, the mean flow velocity decreased and the wall shear stress, mean pressure, energy loss, and pressure loss coefficient increased. Wall shear stress increased when the aneurysm was small, suggesting that is related to the development and growth of the aneurysm.

We report a case of vascular access failure due to idiopathic subclavian artery dissection. A 61-year-old man visited our hospital due to absence of the thrill at the arteriovenous fistula. Ultrasonography revealed arterial dissection from the right subclavian artery to the brachial artery, and the true lumen was stenosed. A fenestration was performed to improve the access flow. Surgical treatment for idiopathic subclavian artery dissection is an option depending on the lesion.