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This work explores the use of an embedded Computational Fluid Dynamics method to study the type B Aortic Dissection. The use of the proposed technique makes it possible to easily test different Intimal Flap configurations without any need of remeshing. To validate the presented methodology we take as reference test case an in vitro experiment present in the literature. This experiment, which considers several Intimal Flap tear configurations (number, size and location), mimics the blood flow in a real type B Aortic Dissection. We prove the correctness and suitability of the presented approach by comparing the pressure values and waveform. The obtained results exhibit a remarkable similarity with the experimental reference data.Complementary, we present a feasible surgical application of the presented computer method. The aim is to help the clinicians in the decision-making before the type B Aortic Dissection surgical fenestration. The capabilities of the proposed technique are exploited to efficiently create artificial re-entry tear configurations . We highlight that only the radius and center of the re-entry tear need to be specified by the clinicians, without any need to modify neither the model geometry nor the mesh.The obtained computational surgical fenestration results are in line with the medical observations in similar clinical studies.