Stent alignment during treatment of a bifurcation

1. A system for treating a target treatment region in a bifurcated vessel, the system comprising:

a first radially expandable stent comprising a proximal end, a distal end, a sidewall having a side hole therethrough, and a plurality of lateral elements,

wherein the first radially expandable stent has a collapsed configuration and an expanded configuration, in the collapsed configuration the first radially expandable stent is configured for delivery through the bifurcated vessel to the target treatment region, and in the expanded configuration the first radially expandable stent is configured to support a vessel wall adjacent the target treatment region, and

wherein in the expanded configuration, the plurality of lateral elements extend laterally away from the side hole;

a second radially expandable stent comprising a proximal end, a distal end, and a plurality of axial elements extending axially away from the proximal end of the second radially expandable stent, and

wherein the second radially expandable stent has a collapsed configuration and an expanded configuration, in the collapsed configuration the second radially expandable stent is configured for delivery to the target treatment region in the bifurcated vessel, and in the expanded configuration the second radially expandable stent is configured to support a vessel wall adjacent the target treatment region, and

wherein the plurality of axial elements of the second radially expandable stent are interdigitated with the plurality of lateral elements of the first radially expandable stent when the first radially expandable stent and the second radially expandable stent are in the expanded configuration, and wherein the system further comprises:

a first expandable member, wherein the first radially expandable stent is disposed on the first expandable member,

a second expandable member, wherein the second radially expandable stent is disposed on the second expandable member, and

wherein the second expandable member is distal of the first expandable member without overlap therebetween during a simultaneous delivery of the first radially expandable stent and the second radially expandable stent to the target treatment region.

2. The system of claim 1 , further comprising:

a first delivery catheter comprising a first elongate shaft with a proximal end and a distal end, the first expandable member adjacent the distal end of the first elongate shaft, and

a second delivery catheter comprising a second elongate shaft with a proximal end and a distal end, the second expandable member adjacent the distal end of the second elongate shaft, and

wherein the first delivery catheter is coupled to the second delivery catheter, so that the first and second delivery catheters are alongside each other during advancement to the target treatment region.

3. The system of claim 2 , wherein the coupling comprises the second elongate shaft disposed under a proximal portion of the first radially expandable stent without the second expandable member being disposed under the proximal portion of the first radially expandable stent, such that the second expandable member is distal of the first expandable member without overlap therebetween.

4. The system of claim 2 , wherein only the second elongate shaft, first elongate shaft and first expandable member are disposed under a proximal portion of the first radially expandable stent.

5. The system of claim 2 , wherein a proximal portion of the first radially expandable stent is partially crimped to both the first and second delivery catheters to allow the second elongate shaft to slidably move relative to the first elongate shaft, and wherein the first radially expandable stent has a distal portion that is fully crimped to the first delivery catheter to prevent axial movement thereof during delivery through a blood vessel.

6. The system of claim 1 , wherein the plurality of axial elements comprise a plurality of interconnected struts.

7. The system of claim 1 , wherein the plurality of lateral elements comprise a plurality of interconnected struts.

8. The system of claim 1 , wherein the first radially expandable stent or the second radially expandable stent is balloon expandable.

9. The system of claim 1 , wherein the plurality of axial elements form an edge with a plurality of peaks and valleys.

10. The system of claim 1 , wherein the plurality of lateral elements form an edge with a plurality of peaks and valleys.

11. The system of claim 1 , further comprising a therapeutic agent disposed on the first radially expandable stent or the second radially expandable stent, the therapeutic agent adapted to being eluted therefrom.

12. The system of claim 1 , wherein the first expandable member and the second expandable member are independently expandable of one another.

13. The system of claim 1 , wherein the first expandable member or the second expandable member is a balloon.

14. The system of claim 1 , wherein the plurality of axial elements comprise one or more struts formed into a series of peaks and valleys, and the plurality of lateral elements comprise one or more struts formed into a series of peaks and valleys, wherein the interdigitation comprises a peak on one of the axial elements being positioned into a valley on one of the lateral elements, or a peak on one of the lateral elements being positioned into a valley on one of the axial elements.

15. The system of claim 1 , wherein the interdigitation of axial and lateral elements provide uniform scaffolding to tissue around the bifurcation.

16. The system of claim 1 , wherein the interdigitation of axial and lateral elements provide continuous scaffolding to tissue around the bifurcation.