Branched stent delivery system

1. An interventional delivery system for acutely angled branched stent grafts comprising: a first catheter having at its distal end a side branch vessel segment; a second catheter attached around the first catheter and having at its distal end a main vessel segment; a side branch vessel device attached to the side branch vessel segment of the first catheter; a main vessel device attached to the main vessel segment of the second catheter; and a bifurcated guidewire with at least two distal tips which is configured to move slidably within the first catheter, wherein the main vessel device and the side branch vessel device are simultaneously delivered to a treatment site; wherein the first catheter further comprises a crotch which provides a positive stop for maintaining a portion of the side branch device within a sealing sleeve of the main vessel device body to ensure adequate engagement.

2. A method of deploying a branched stent assembly comprising:

advancing a catheter assembly comprising: an interventional delivery system for acutely angled branched stent grafts comprising: a first catheter having at its distal end a side branch vessel segment; a second catheter attached around the first catheter and having at its distal end a main vessel segment; a side branch vessel device attached to the side branch vessel segment of the first catheter; a main vessel device attached to the main vessel segment of the second catheter; and a bifurcated guidewire with at least two distal tips which is configured to move slidably within the first catheter, wherein the main vessel device and the side branch vessel device are simultaneously delivered to a treatment site, on a bifurcated guidewire to a treatment site;

orienting the catheter assembly in the main vessel;

pulling the bifurcated guidewire to orient a portion of the bifurcated guidewire into the side branch vessel;

deploying the main vessel device in the main vessel;

advancing the side branch vessel device to a desired location;

deploying the side branch device;

pushing the guidewire forward until the portion of the guidewire in the side branch vessel is retracted into the first catheter;

pushing the first catheter forward until the reverse facing tip is retracted into the capture tube; and

withdrawing the first catheter, the bifurcated guidewire, and the second catheter.

3. The method of claim 2 wherein the branched stent assembly is deployed in a main vessel and side branch vessel which are oriented at an acute angle to each other.