Pusher-assembly for an insertion system for a self-expandable vascular implant

An insertion system comprising a vascular implant and a pusher assembly for the vascular implant, wherein the pusher assembly has a catheter tube which has a lumen for accommodating a guide wire and which has a proximal catheter tube portion and, adjoining the latter, a distal catheter tube portion, wherein the distal catheter tube portion is provided at least partially for movably accommodating the vascular implant thereon, and wherein the catheter tube moreover has a pusher unit for releasing the vascular implant, said pusher unit being proximally adjacent to the vascular implant loaded onto the catheter tube, wherein the pusher unit is formed by individual, segment-like elements, which are arranged one behind another and adjacent to one another on the catheter tube and proximally adjacent to the vascular implant, such that a distal most one of the pusher unit elements pushes on a proximal end of the vascular implant;

• wherein the elements are threaded onto the catheter tube;
• wherein the individual elements have a shape that is chosen from spherical, or substantially spherical, oval, conical, frustoconical, and bell-shaped;
• wherein the elements are in direct contact with one another but are not fixed directly to one another, such that the elements form articulable joints between one another;
• and
• wherein the elements moreover have a proximal end and a distal end and a central bore for forming a proximal opening and a distal opening and for forming a channel which is routed through the elements and through which the elements are threaded onto the catheter tube, thereby guiding the catheter tube through the elements.