Patent ID: 8282678

Claim:
A device for insertion into a body lumen having a fluctuating caliber, the device comprising: a cylindrical lining having a radial resistance less than a radial force originated by the body and applied to the lining by the lumen as the caliber of the lumen fluctuates so as to allow the lining to continuously conform to the shape of the lumen; and a stent withstanding all radial forces originated by the body and exerted on the stent by the lumen wall such that the caliber of the stent does not decrease after deployment into the lumen, wherein (1) the cylindrical lining is tapered at least at one end on an inner and an outer surface of the cylindrical lining such that a thickness of the lining between the inner and outer surfaces is uniform along the taper, (2) the lining and the stent form a continuous tubular structure, (3) a thickness of the stent is of equal thickness as that of the lining, (4) the thickness of the stent is uniform across its length, (5) the lining is formed from a resilient film fashioned into an undulating helix and (6) spaces between parts of the filament are filled with a bio-stable polymeric membrane.