Appliance to be implanted, method of collapsing the appliance to be implanted and method of using the appliance to be implanted

The method of using an appliance to be implanted in a bifurcated vessel having first and second branches, said appliance comprising a single front end wire ring, parallelly arranged to rear end wire rings facing the front end wire ring and a Y shaped tubular cover connecting the front end wire ring and the rear end wire rings into a Y shaped structure having first and second rear portions bifurcated from a single trunk, characterized by forming a front hooking means at the front end wire ring for pulling the appliance to be implanted forward and forming a rear end hooking means at each of the rear end wire rings for pulling each of the rear portions of the appliance to be implanted rearwardly, respectively, the method further comprising the steps of:

• pulling the front hooking means of the front end wire ring toward a target portion where the appliance is to be implanted in the vessel so as to transport the appliance to said target portion and thereafter pulling each of the two rear hooking means of the rear end wire rings appropriately so as to drag each of the rear end wire rings, whereby each of the rear portions is dragged into a separate branch of the bifurcated vessel.