| 主权项 |
1. A method of engaging a coronary artery catheter, adapted for introducing a distal end of the coronary artery catheter into a coronary ostium through an artery of an arm, with the coronary ostium,
wherein the coronary artery catheter has a catheter body with a lumen formed therein, the catheter body in a natural state including a proximal straight section being originally straight, a first curved section extending distally from the proximal straight section while being curved, an intermediate straight section being originally straight and extending distally from the first curved section, a second curved section extending distally from the intermediate straight section while being curved, wherein the second curved section has a curvature radius that decreases from the proximal end toward a distal end and part of the second curved section makes linear contact with, and is engaged with, an inner wall of an ascending aorta, which is located opposite to a left coronary ostium, and a distalmost section extending from the second curved section to a distal end of the catheter body, with directions of curvature of the first curved section and the second curved section projected onto a plane on which the first curved section and the intermediate straight section are present coinciding with each other, the method comprising:
engaging the distalmost section with the coronary ostium;bringing the second curved section into linear contact with the inner wall of the ascending aorta opposite to the coronary ostium;disposing the intermediate straight section both inside the ascending aorta and inside a brachiocephalic trunk; anddisposing the first curved section inside the brachiocephalic trunk. |
