Suprarenal fixation of endovascular aortic stent grafts: Assessment of medium-term to long-term renal function by analysis of juxtarenal stent morphology

Zenith self-expanding modular bifurcated aortic endograft with magnified view of the uncovered suprarenal stent struts.

Helical computed tomography angiography formatted for three-dimensional postprocessing shows (a) intraluminal threshold view, (b) metallic stent threshold view, and (c) combined image demonstrating the stent strut crossing the luminal ostia.

Virtual intravascular imaging. A, Peripheral encroachment of the renal artery ostia (stent struts shown by black arrows). B, No encroachment of the renal artery ostia (clear ostia shown by white arrows).

Analysis variance test for linear trend in serum creatinine concentration (mmol/L) for the anatomic configuration subgroup (presence of centrally located struts around one, both, or none of the renal artery ostia).

Analysis variance test for linear trend in serum creatinine concentration (mmol/L) for the quantitative configuration subgroup (quantity of struts present at either of the renal artery ostia).