Endoluminal prosthetic bifurcation shunt

The present invention provides, methods, systems, and devices which allow a surgeon to seal off the branch port of a bifurcated endoluminal prosthesis, thereby effectively transforming the bifurcated prosthesis to a single-lumen prosthesis. Generally, the methods and devices of the present invention will be available for fallback procedures when the deployment of a bifurcated endoluminal prosthesis is found to be impracticable. By effectively sealing off the second branch port, the attending physician is able to completely isolate an aneurysm or other disease of the vasculature. Where it is necessary and/or desirable to provide fluid communication between the trunk lumen and the second branch lumen, a separate passage may be provided between the first and second branches of the body lumen system.\!