Aneurismas experimentales en cerdos con la técnica de Varsos / Varsos technique for experimental aneurysms in pigs

ABSTRACT

Objective. To achieve an aneurysm model in swine with a low rate of sponatneous thrombosis. Material and method. Five swines were operated using a two stages technique (Varsos technique). In the first step ten carotidjugular fistulas in the neck (4 internal and 6 external jugular vein) were performed. The two vessels formed a 45° angle after the anastomosis. After a week the venous component of the fistula was occluded in order to create an aneurysm. The aneurysms patency was angiographically studied fifteen days later. At this time several types of stents and coils could be released. Results . The fistula and the aneuysms could be performed without complications. Seven of 10 aneurysm were angiogaphically patent. Three were thrombosed, all of them were created with the internal jugular vein. A carotid stenosis was observed at the anastomosis site in a thrombosed aneurysm. Conclusions. The Varsos technique in swines, specially when performed with the external yugular vein has a low rate of spontaneous aneurysm thrombosis.