STENT DELIVERY AT A BIFURCATION, SYSTEMS AND METHODS
First Claim
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1. A method for positioning a scaffold at a bifurcation of a main lumen into first and second branch lumens, said method comprising:
- advancing a first balloon catheter system to the bifurcation, the first catheter system having a non-bifurcated scaffold positioned over a main balloon or balloons disposed on a distal portion of the catheter, the scaffold comprising a proximal portion positioned over the balloon(s) and a distal portion positioned either over the balloon(s) or distally of the balloon(s), wherein the balloon catheter system is advanced until the distal portion of the scaffold is aligned adjacent to or approaches the bifurcation;
inflating the main balloon(s) to expand the proximal portion of the scaffold on a generally proximal side of the bifurcation while the distal portion of the scaffold remains either unexpanded or partially expanded;
introducing a second scaffold expansion system having a first balloon and second balloon, the second system advanced so that said first and second balloons are positioned within the distal portion of the scaffold; and
inflating the first and second balloons to expand the distal portion of the scaffold on a generally distal side of the bifurcation.
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Abstract
The present invention provides systems and methods for delivery of a stent or scaffold at a blood vessel or body lumen bifurcation. A method can include positioning a scaffold at a bifurcation of a main lumen into first and second branch lumens using a first expansion catheter, inflating a main balloon of the catheter to expand the proximal portion of the scaffold, positioning a second expansion system, and expanding the distal portion of the scaffold on a generally distal side of the bifurcation.
55 Citations
36 Claims
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1. A method for positioning a scaffold at a bifurcation of a main lumen into first and second branch lumens, said method comprising:
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advancing a first balloon catheter system to the bifurcation, the first catheter system having a non-bifurcated scaffold positioned over a main balloon or balloons disposed on a distal portion of the catheter, the scaffold comprising a proximal portion positioned over the balloon(s) and a distal portion positioned either over the balloon(s) or distally of the balloon(s), wherein the balloon catheter system is advanced until the distal portion of the scaffold is aligned adjacent to or approaches the bifurcation; inflating the main balloon(s) to expand the proximal portion of the scaffold on a generally proximal side of the bifurcation while the distal portion of the scaffold remains either unexpanded or partially expanded; introducing a second scaffold expansion system having a first balloon and second balloon, the second system advanced so that said first and second balloons are positioned within the distal portion of the scaffold; and inflating the first and second balloons to expand the distal portion of the scaffold on a generally distal side of the bifurcation. - View Dependent Claims (2)
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3. A method for positioning a cylindrical scaffold at a bifurcation of a main lumen into first and second branch lumens, said method comprising:
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placing a first guidewire from the main lumen into the first branch lumen and a second guidewire from the main lumen into the second branch lumen; advancing a main balloon catheter over at least one guidewire, wherein a proximal portion of the scaffold is positioned over the balloon(s) and a distal portion of the scaffold is positioned either over the balloon(s) or distally of the balloon(s), wherein the balloon catheter is advanced until the distal portion of the scaffold has entered the bifurcation; inflating the main catheter balloon(s) to expand the proximal portion of the scaffold on a generally proximal side of the bifurcation while the distal portion of the scaffold remains either unexpanded or partially expanded, with one guidewire or portion of a guidewire apparatus positioned in the first branch lumen distal to the bifurcation and a second guidewire or portion of a guidewire apparatus positioned in the second branch distal to the bifurcation; introducing first and second balloon catheters over a first guidewire from the main lumen into the first branch lumen and over a second guidewire from the main lumen into the second branch lumen, respectively, so that said first and second balloons are positioned side-by-side within the distal portion of the scaffold; and inflating the first and second balloons to expand the distal portion of the scaffold on a generally distal side of the bifurcation. - View Dependent Claims (4, 5, 6, 7, 8, 9, 27, 28, 29)
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10. A scaffold delivery catheter, comprising:
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a catheter body having a distal end, a proximal end, and at least one guidewire lumen extending to the distal end, a main inflatable balloon or balloons disposed on the catheter body at a predetermined distance proximally of the distal end; and a cylindrical scaffold having a proximal portion disposed over the inflatable balloon(s) and a distal portion disposed either over the balloon(s) or distally of the inflated balloon(s), the scaffold disposed over the balloon(s) such that inflation of the inflatable balloon(s) will expand the proximal portion of the cylindrical scaffold while leaving the distal portion of the scaffold either unexpanded or partially expanded. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 30, 31, 32, 33, 34, 35, 36)
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Specification