Debranching Stent Graft Limb and Methods for Use
A debranching stent graft limb and methods for its use, where the limb comprises, a main body stent graft limb with a bifurcation defining a first and second leg, the main body stent graft limb has a distal end and a proximal end, the main body stent graft limb has a diameter at the proximal end in the range from about 14-18 mm, the first leg has a diameter ranging from about 8-12 mm, the second leg has a diameter ranging from about 6-10 mm, and the distance from the proximal end of the main body to the distal end of the first leg and the second leg is in the range from about 70-90 mm, and the diameter of the first leg is about 2 mm greater than the diameter of the second leg.
1 . A debranching stent graft limb comprising:
a main body stent graft limb with a bifurcation defining a first leg and a second leg, wherein the main body stent graft limb has a distal end and a proximal end; wherein the main body stent graft limb has a diameter at the proximal end in the range from about 14 mm to about 18 mm; wherein the diameter along the length of the main body stent graft limb either tapers outwardly toward the distal end or remains constant; wherein the first leg has a diameter ranging from about 8 mm to about 12 mm; wherein the second leg has a diameter ranging from about 6 mm to about 10 mm; and wherein the distance from the proximal end of the main body to the distal end of the first leg and the second leg is in the range from about 70 mm to about 90 mm; and wherein the diameter of the first leg is about 2 mm greater than the diameter of the second leg; wherein the length of the first leg and the length of the second leg are each a minimum of about 30 mm; and wherein the main body stent graft comprises a stent structure extending along the length of the main body stent graft, wherein the first leg comprises a stent structure extending along the length of the first leg and wherein the second leg comprises a stent structure extending along the length of the second leg.
2 . The debranching stent graft limb of claim 1 , wherein the diameter of the first leg is about 10 mm and the diameter of the second leg is about 8 mm.
3 . The debranching stent graft limb of claim 1 , wherein the diameter of the main body stent graft at the proximal end is about 16 mm.
4 . The debranching stent graft limb of claim 1 , wherein the distance from the proximal end of the main body to the bifurcation is in the range from about 40 mm to 60 mm.
5 . The debranching stent graft limb of claim 1 , further comprising:
a first limb expanded within the first leg and coupled to the first leg via passive fixation; and
a second limb expanded within the second leg and coupled to the second leg via passive fixation.
6 . The debranching stent graft limb of claim 2 , wherein the diameter of the main body stent graft at the proximal end is about 16 mm.
7 . The debranching stent graft limb of claim 2 , wherein the distance from the proximal end of the main body to the bifurcation is in the range from about 40 mm to 60 mm.
8 . The debranching stent graft limb of claim 2 , further comprising:
a first limb expanded within the first leg and coupled to the first leg via passive fixation; and
a second limb expanded within the second leg and coupled to the second leg via passive fixation.
9 . The debranching stent graft limb of claim 3 , wherein the distance from the proximal end of the main body to the bifurcation is in the range from about 40 mm to 60 mm.
10 . The debranching stent graft limb of claim 4 , further comprising:
a first limb expanded within the first leg and coupled to the first leg via passive fixation; and
a second limb expanded within the second leg and coupled to the second leg via passive fixation.
11 . The debranching stent graft limb of claim 3 , further comprising:
a first limb expanded within the first leg and coupled to the first leg via passive fixation; and
a second limb expanded within the second leg and coupled to the second leg via passive fixation.
12 . A method for placement of a debranching stent graft limb, the method comprising:
introducing a guidewire into any appropriately sized branched arterial configuration via arterial access;
loading a delivery catheter containing the debranching stent graft limb of claim 1 onto the guidewire;
moving the delivery catheter along the guidewire and introducing the delivery catheter into the appropriately sized branched arterial configuration via arterial access; and
deploying the debranching stent graft limb into the appropriately sized branched arterial configuration and/or a lumen of a previously-placed stent graft.
13 . The method of claim 12 further comprising:
loading a second delivery catheter containing a first limb onto a proximal end of the guidewire;
moving the second delivery catheter along the guidewire and introducing the second delivery catheter into the first leg of the debranching stent graft limb via arterial access; and
deploying a proximal end of the first limb into the first leg of the debranching stent graft limb.
14 . The method of claim 13 , further comprising
introducing a second guidewire into the appropriately sized branched arterial configuration through the second leg of a debranching stent graft limb via arterial access;
loading a third delivery catheter containing a second limb onto the second guidewire;
moving the third delivery catheter along the second guidewire and introducing the third delivery catheter into the second leg of the debranching stent graft limb via arterial access; and
deploying a proximal end of the second limb into the second leg of the debranching stent graft limb in the appropriately sized branched arterial configuration.
15 . The method of claim 14 , further comprising placing an axillary conduit in an exposed artery in an arm.
16 . The method of claim 12 , wherein the appropriately sized branched arterial configuration comprises the common iliac artery.