Patent ID: 8123796

Claim:
A stent prosthesis for vascular surgery for inserting into an artery to bridge and by-pass a vascular enlargement of the artery, comprising a tubular flexible and radially expandable stent body having a front end and a rear end that is spaced from the front end by a tube length, the stent body including along said tube length a tubular peripheral liquid-proof sheathing that is liquid-proof against liquid blood along said tube length and has a peripheral outer surface along said tube length, the tubular sheathing configured to be radially expandable with respect to a longitudinal axis of the tubular sheathing from a radially folded condition to an unfolded condition during said insertion into the artery to open an inside channel longitudinally through the sheathing and to sealingly attach itself around an inner wall of the artery in front of and behind the vascular enlargement in the artery to bridge the vascular enlargement in the artery by the liquid-proof tubular sheathing and bypass the vascular enlargement through said inside channel, the stent prosthesis further comprising at least one tear-proof long thread, the tear-proof thread including a fixed end and a free end, wherein the fixed end is permanently and fixedly attached to the sheathing in a tear-proof manner at a point of attachment located directly on the outer surface of the sheathing in a distance from the front end and from the rear end of the stent body, the long thread including a material that is visible in x-ray radiation and having a free thread length that extends from the fixed end of the long thread up to the free end thereof, wherein the free thread length includes the free end and is freely exposed outside the stent body, and the free thread length of the long thread is of several decimeters configured to be passed with the free end of the thread as a leading end into the artery in advance of passing the stent body into the artery and further configured to be caught in the artery by a surgical appliance and extracted out from the artery by the surgical appliance through an auxiliary puncture of a vascular wall, the long thread further configured to resist pulling forces applied onto the free thread length for manipulation of the implanted stent body to be aligned and placed in position in the artery and for a subsequent fixation of the stent body to the vascular wall by means of the extracted free thread length, wherein the fixed end of the long thread is fixedly attached to the sheathing in such a tear-proof manner that the fixed end cannot get detached from the stent body by applying said pulling forces onto the free thread length.