Endovascular abdominal aortic aneurysms repair (EVAR) involves the minimally invasive implantation of a stent-graft
within the aorta to exclude the aneurysm from the circulation thus preventing its rupture. The feasibility of such
operation is highly dependent on the aorta morphology and in general the presence of one/both renal arteries emerging
from the aneurysm is the absolute limit for the implantation of a standard stent-graft. Consequently, classical intervention
methods involve the implantation of a custom-made graft with fenestrations, leading to extremely complicated surgeries
with high risks for the patient and high costs. Recent techniques introduced the use of standard grafts (i.e. without
fenestrations) in association with mechanical in-situ fenestration, but this procedure is limited principally by the
brittleness and low stability of the environment, in addition to the difficulty of controlling the guidance of the
endovascular tools due to the temporarily block of the blood flow. In this work we propose an innovative EVAR strategy,
which involves in-situ fenestration with a fiber guided laser tool, controlled via an electromagnetic navigation system.
The fiber is sensorized to be tracked by means of the driving system and, using a 3D model of the patient anatomy, the
surgeon can drive the fiber to the aneurysm, where the stent has been previously released, to realize the proper
fenestration(s). The design and construction of the catheter laser tool will be presented, togheter with preliminary
fenestration tests on graft-materials, including the effects due to the presence of blood and tissues.