Method of implanting an aortic stent

A method of implanting an aortic stent into a heart having an aorta, a descending aorta, an ascending aorta, a brachiocephalic artery, a left common carotid artery and a left subclavian artery, said stent including a main tube and a plurality of tube branches comprising steps of:

• putting a main tube on a metal guide wire, the metal guide wire is attached to one end of a needle which is disposed in the aorta;
• moving the main tube along the metal guide wire to the descending aorta, wherein the main tube is constrained by a first cover, and the main tube is bifurcated and comprises a main section having an outer diameter about equal to an inner diameter of a blood vessel of the descending aorta, and first and second tube bifurcations are branched from the main section;
• the first tube bifurcation includes a first membrane for dividing inside of the first tube bifurcation into a first tube branch having a first space and a second tube branch having a second space;
• the second tube bifurcation includes a second membrane for dividing inside of the second tube bifurcation into a third tube branch having a third space and a fourth tube branch having a fourth space;
• the first space has an outer diameter, and said outer diameter of said first space, which corresponds to an inner diameter of an ascending aorta, is larger than outer diameters of the second space, the third space and the fourth space;
• removing the first cover;
• inserting a second metal guide wire through the first space into the ascending aorta, and moving the first tube branch along the second metal guide into the ascending aorta;
• inserting a third metal guide wire through the second space into the branchiocephalic artery, and moving the second tube branch along the third metal guide into the branchiocephalic artery;
• inserting a fourth metal guide wire through the third space into the left common carotid artery, and moving the third tube branch along the fourth metal guide into the left common carotid artery;
• inserting a fifth metal guide wire through the fourth space into the left subclavian artery, and moving the fourth tube branch along the fourth metal guide into the left subclavian artery;
• removing a second cover constraining said tube branches,
• wherein blood is configured to travel from the descending aorta and then to the main tube, the first space, the second space, the third space, and the fourth space.