IMPLANTIERBARE HOHLE PROTHESE

摘要

The inventive implantable hollow prosthesis is made of polymer material, in particular of polytetrafluorethylene or copolymers based on tetrafluorethylene whose structure is embodied in the form of the elements of knots linked by fibrils and the elements of void space, said elements being jointed into a three-dimensional grid. Said implantable prosthesis is formed at least by one layer which is produced by winding a tape made of material having the volume fraction of void space ranging from 25 to 94 %, the specific surface area of void space ranging from 0.1 to 0.9 mkm<2>/mkm<3>, the mean distance between voids in volume ranging from 1.5 to 50 mkm, the mean chord volume ranging from 0.4 to 30 mkm, or of material having the volume fraction of void space ranging from 1 to 35 %, the specific surface area of void space ranging from 0.5 to 20 mkm<2>/mkm<3>, the mean distance between voids in volume ranging from 0.5 to 15 mkm, the mean chord volume ranging from 0.1 to 10 mkm. The implantable prosthesis also comprises an internal porous frame with wall thickness of 0.2-2.0 mm made of material having the volume fraction of void space ranging from 30 to 90 %, the specific surface area of void space ranging from 0.1 to 0.9 mkm<2>/mkm<3>, the mean distance between voids in volume ranging from 0.5 to 50 mkm and the mean chord volume ranging from 1 to 30 mkm.