Figure 4.

The figure shows the construction of two wide-neck aneurysms in a cavernous carotid artery model. The object of the model is to represent two aneurysms in an artery with the precise curvature typical of the cavernous artery. This requires the use of one arterial graft and one venous graft (image 4a). The arterial graft is used as a recipient of the venous graft. For its subsequent implementation in the carotid artery, two oblique cuts with lateral slits (fish mouth) are made at each end. In this same artery, two lateral slits are made for the implantation of the venous grafts. The size of these lateral slits determines the neck of the aneurysm and the size of the selected vein dictates the size of the aneurismal dome. To carry out the anastomosis, the usual technique is followed, anchoring first at the margins and tensing a continuous suture once all points have been correctly passed (images 4b and c). Image 4d corresponds to a typical angiography of a wide-neck aneurysm of the intracavernosal carotid artery. In image 4e the created model is shown, ready for later implantation in the experimental animal. Image 4f shows a surgical image of the model after implantation.