Medical implant having outer skirt with 3d structure

A manufacturing method for an implant for transcatheter delivery to an implantation site comprising:

• providing an implant component defining a flow passage, the flow passage having an inflow end and an outflow end, wherein the medical implant component comprises a stent-structure,
• wherein the stent-structure has a compressed state and is expandable into functional state, and
• wherein the stent-structure comprises a first stent-structure end, second stent-structure end opposite the first stent-structure end, a plurality of full cells and a longitudinal axis, wherein each full cell comprises two zig-zag structures formed by a plurality of struts, wherein the vertices of the zig-zag structures are coupled together, wherein each zig-zag structure extends around the full circumference of the stent-structure with regard to the longitudinal axis,
• 3D shaping an outer skirt to comprise a plurality of protrusions forming a seamless 3D structure extending radially outward from a flat portion of the outer skirt,
• affixing the outer skirt to the stent-structure using a suture in at least a sealing section and a fold creating section such that it extends at least partly outside the stent-structure and such that in the sealing section the outer skirt is sutured to each strut of at least two directly adjacent zig-zag structures along the full circumference of the stent-structure and
• such that in the fold creating section the outer skirt is sutured to at least part of the struts of one zig-zag structure around the full circumference of the stent-structure and such that the outer skirt forms a fold with the diameter enlarging 3D structure by interaction with the fluid flow when the medical implant is placed at the implantation site and the flat portion of the outer skirt abuts the stent-structure.