Catheter guidance through a calcified aortic valve
A method of treating a patient with a calcified aortic valve includes introducing a guide wire into a blood vessel. The guide wire is advanced through the aorta and the aortic valve. A balloon dilatation catheter is introduced into the blood vessel over the guide wire. The balloon dilatation catheter includes an elongate body, a distal portion, a guide wire lumen, an inflation lumen, and a dilatation balloon. The balloon dilatation catheter further includes at least one deflection wire lumen, and at least one deflection wire residing in the at least one deflection wire lumen and having a distal end attached to the distal portion. The balloon dilatation catheter is advanced over the guide wire through the aorta. The deflection wire is pushed towards the distal portion so that the deflection wire bows outward. The balloon dilatation catheter is advanced through the aortic valve, and the dilatation balloon is inflated.
1. A method of treating a patient with a calcified aortic valve, the method comprising:
introducing a guide wire into a blood vessel;
advancing the guide wire through the aorta to the aortic valve;
advancing the guide wire through the aortic valve;
introducing a balloon dilatation catheter into the blood vessel over the guide wire, the balloon dilatation catheter comprising an elongate body, a distal portion, a guide wire lumen, an inflation lumen, a dilatation balloon, at least one deflection wire lumen, the at least one deflection wire lumen having a distal opening proximal the distal portion, at least one deflection wire residing in the at least one deflection wire lumen and having a distal end attached to the distal portion;
advancing the balloon dilatation catheter over the guide wire through the aorta;
pushing the deflection wire towards the distal portion so that the deflection wire bows outward without inflating the dilatation balloon;
advancing the balloon dilatation catheter with a bowed outward deflection wire through the aortic valve; and
inflating the dilatation balloon.
2. The method of treating a patient of claim 1 , wherein the at least one deflection wire has an oblong cross-sectional area.
3. The method of treating a patient of claim 2 , wherein the at least one deflection wire has a generally rectangular cross-sectional area.
4. The method of treating a patient of claim 2 , wherein the at least one deflection wire has a generally elliptical cross-sectional area.
5. The method of treating a patient of claim 1 , wherein the at least one deflection wire comprises a plurality of deflection wires spaced approximately evenly around the periphery of the catheter.