Percutaneously implantable flap stent, device for applying the same and method for producing the flap stent

摘要

A valve stent includes a plurality of crown elements arranged coaxially one behind the other, each formed by several u-shaped bends with at least one base and two ends. The bases of one crown element are connected to the ends of another crown element via connection bars. To produce this valve stent, 3D droplet dosing technology is used to form a thin-walled sandwich structure. A device, suitable for application of a stent is provided with positioning wires having clamps at their ends which can be connected to the fixing hooks at the ends of the crown elements in force-locking manner.

主权项

1. A valve stent comprising:
a proximal crown element comprising no more than three u-shaped proximal crown element bends, each of said u-shaped proximal crown element bends comprising a crown element base and two crown element end portions, each of said two crown element end portions defining a distal-most portion of one of said u-shaped crown element bends, said base defining a proximal-most portion of said one of said u-shaped crown element bends, said crown element base being located between said two crown element end portions; a distal crown element comprising no more than three u-shaped distal crown element bends, wherein a shape of one of said u-shaped distal crown element bends is different from a shape of one of said proximal u-shaped crown element bends, wherein said proximal crown element is flatter than said distal crown element, said u-shaped distal crown element bend comprising two distal crown element end portions and a distal crown element base, each of said two distal crown element end portions defining a distal-most portion of said distal crown element, said distal crown element base defining a proximal-most portion of said distal crown element, said distal crown element base being located between said two distal crown element end portions, said proximal crown element and said distal crown element being arranged coaxially one behind the other, wherein ends of said proximal crown element and said distal crown element are arranged directly successive and are not distorted by an angle, each of said u-shaped distal crown element bends being connected directly with one valve leaflet; and connecting bars, each of said connecting bars extending exclusively from one proximal crown element base to one of said distal crown element end portions.