Arterial occlusion implant and delivery catheter and methods

A method of occluding an artery, comprising:

• advancing a first guidewire through the artery beyond a site at which an occlusion is desired;
• advancing a first catheter over the first guidewire to the artery to the site at which an occlusion is desired, the first catheter including a device lumen and an inflation lumen, the inflation lumen fluidly coupled with an inflatable balloon disposed on a first side of the first catheter, the first catheter including a trap door on an opposing second side of the first catheter, the trap door providing access to the device lumen;
• inflating the inflatable balloon, thereby pushing the second side of the first catheter towards a wall of the artery;
• withdrawing the first guidewire, allowing the trap door to drop into the device lumen;
• advancing a second guidewire out the trap door and into a subintimal space of the wall of the artery;
• advancing a second catheter over the second guidewire through the trap door and into the subintimal space of the wall of the artery;
• withdrawing the second guidewire;
• and
• advancing an occlusion implant through the second catheter into position within the subintimal space of the wall of the artery;
• wherein the occlusion implant is adapted to permanently occlude the artery.