A tubular prosthesis (100 200 300 400 500) comprises a tubular member having raised portions (102a, b 202a, b 302a, b 402a, b 502a, b), which can be formed from and be part of the tubular member. The raised portions (102a, b 202a, b 302a, b 402a, b 502a, b) form a chamber or discrete space in a body passageway or lumen between the prosthesis and a portion of the passageway or lumen wall in which it is placed. A substance can be delivered to the chamber to assist the prosthesis placement. The substance can comprise one or more substances that can enhance the seal and/or fixation characteristics between the prosthesis the passageway wall and/or provide therapeutic benefit. In another embodiment, the raised portions can be collars secured to the tubular member and in yet a further embodiment the raised portions can comprise inflatable collars.
