P. Desgranges et al., Transluminal treatment of abdominal aortic aneurysms. Is there a risk of obstructing the renal arterial ostia?, J MAL VASC, 23(5), 1998, pp. 385-386
During transluminal treatment of an aneurysm of the abdominal aorta, the pr
oximal part of the stent may sometimes lay over the ostia of the renal arte
ries.
Animal studies have shown various scarring patterns depending on the type o
f stent used and its duration of implantation. The Gianturco(R) and Wallste
nt(R) appear to be better tolerated than the Palmaz(R) stents. The AA have
shown that, with the Strecker(R) stents, a neointima developed between the
meshes of the stent over a surface of 43 % +/- 30 % in 6 weeks.
May and Parodi report some occlusions in their clinical series. In the AA's
series using Vanguard, no renal artery was thrombosed despite the fact tha
t the stent lay over the artery on 2 occasions in 105 patients.
In conclusion, the consequences of the proximal part of a stent laying over
the ostium of a renal artery depend mainly on the type of stent used. "Wid
e mesh" stents are probably the best to use to prevent serious renal compli
cations.