A vascular prosthesis has a plurality of tubular structures, each of which is manually separable from the others. Each tube structure has a biocompatible exterior surface and a lumen of predetermine diameter. Fluid, such as blood, is channelled through the lumina upon implantation in an arterial or venous...http://www.google.de/patents/US5197976?utm_source=gb-gplus-sharePatent US5197976 - Manually separable multi-lumen vascular graft
