Patent attributes
A prosthesis includes a tube with a proximal and distal flange around the tube. The distal and proximal flanges have a radial position, projecting radially outward to clamp tissue between the flanges. The flanges include distal flange feet and proximal flange feet. The distal and proximal flange feet bend from the radial position, against a pre-tension of the memory material, to an extended position, in which the distal and proximal flange feet extend in the longitudinal direction of the tube and are fixable there, returning when released to the radial position urged by the pre-tension. The flange feet have on inner sides a filling to increase the clamping force. The flange feet have a concave-curved part extending from the fixed ends of the flange feet. The hollow side of the concave faces the proximal and/or distal flange and the filling is provided in the hollow side of the concave.
