Bifurcated endoluminal prosthesis

A bifurcated stent having an assembly bifurcation for use with an angiological bifurcation of a blood vessel into two branched vessels comprising:

• a proximal stent portion adapted to be disposed within said blood vessel,
• a first stent comprising the proximal stent portion, an intermediate stent portion, and a first distal stent portion adapted to extend across the angiological bifurcation into one of the branched vessels,
• the intermediate stent portion extending distally relative to said assembly bifurcation, and
• a second stent comprising a second distal stent portion joined to said intermediate stent portion of said first stent and adapted to allow blood to flow from said proximal stent portion into the other branched vessel,
• wherein said proximal stent portion, said first distal stent portion, and said second distal stent portion each comprises a wire following a sinuous path to define a plurality of circumferentially spaced apices formed into a tubular configuration,
• wherein said wire defines a sinuous configuration of a plurality of hoops comprising a substantially complete turn of the wire such that a plane of a circumference of each hoop is disposed substantially perpendicular and is not skewed with respect to a longitudinal axis of said bifurcated stent,
• wherein, at an end of each hoop, said wire is displaced longitudinally with respect to a winding axis of said wire to form a next hoop,
• wherein each longitudinal end of said bifurcated stent is square to said longitudinal axis of said bifurcated stent,
• wherein a frustoconical male engaging portion tapered radially inward from its proximal to its distal end terminates at a proximal end of said second stent and a frustoconical female cooperating portion tapered radially inward from its proximal end to its distal end terminates at a distal end of said intermediate stent portion and wherein a distal orifice at said distal end of said intermediate stent portion remains in an expanded configuration after being joined to said male engaging portion, and
• wherein a proximal end of said proximal stent portion is flared radially outwardly towards its extremity and adapted to engage an endoluminal surface of said blood vessel, thereby to resist longitudinal movement of said bifurcated stent in service, and wherein said proximal stent portion, other than said proximal end of said proximal stent, is generally cylindrical.

A bifurcated stent having an assembly bifurcation for use with an angiological bifurcation of a blood vessel into two branched vessels comprising:

• a first stent comprising a first distal stent portion adapted to extend across the angiological bifurcation into one of the branched vessels, and an intermediate stent portion extending distally relative to said assembly bifurcation, and
• a second stent comprising a second distal stent portion joined to said intermediate stent portion of said first stent and adapted to allow blood to flow from said proximal stent portion into the other branched vessel,
• wherein a wire defines a sinuous configuration of a plurality of hoops comprising a substantially complete turn of said wire such that a plane of a circumference of each hoop is disposed substantially perpendicular and is not skewed with respect to a longitudinal axis of said bifurcated stent,
• wherein, at an end of each hoop, said wire is displaced longitudinally with respect to a winding axis of said wire to form a next hoop,
• wherein each longitudinal end of said bifurcated stent is square to said longitudinal axis of said bifurcated stent, and
• wherein a frustoconical male engaging portion tapered radially inward from its proximal to its distal end terminates at a proximal end of said second stent and a frustoconical female cooperating portion tapered radially inward from its proximal end to its distal end terminates at a distal end of said intermediate stent portion and wherein a distal orifice at said distal end of said intermediate stent portion remains in an expanded configuration after being joined to said male engaging portion.