Antegrade cardioplegia catheter and method
First Claim
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1. A method of inducing cardioplegic arrest comprising:
- forming a penetration in a wall of a left chamber of the heart;
positioning a cardioplegia catheter through the penetration into the left chamber of the heart;
forming a seal between the wall of the heart and the cardioplegia catheter to inhibit leakage of blood through the penetration;
advancing a distal end of the cardioplegia catheter in the direction of blood flow from the left chamber of the heart, through the aortic valve and into the ascending aorta;
expanding an occlusion member on the cardioplegia catheter so as to occlude the ascending aorta downstream of the coronary ostia and upstream of the brachiocephalic artery;
delivering cardioplegic fluid through the coronary vasculature to the myocardium so as to arrest cardiac function; and
circulating oxygenated blood in the patients arterial system downstream of the occlusion member.
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Abstract
A cardioplegia catheter is configured to extend into the ascending aorta with a proximal portion of the shaft extending into a left chamber of the heart through the aortic valve and out of the heart through a penetration in a wall thereof. The cardioplegia catheter has an occlusion member configured to occlude the ascending aorta between the brachiocephalic artery and the coronary ostia. An arterial return cannula delivers oxygenated blood to the arterial system downstream of the occlusion member, while cardioplegic fluid is delivered through a lumen in the cardioplegia catheter upstream of the occlusion member to induce cardioplegic arrest.
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Citations
11 Claims
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1. A method of inducing cardioplegic arrest comprising:
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forming a penetration in a wall of a left chamber of the heart;
positioning a cardioplegia catheter through the penetration into the left chamber of the heart;forming a seal between the wall of the heart and the cardioplegia catheter to inhibit leakage of blood through the penetration; advancing a distal end of the cardioplegia catheter in the direction of blood flow from the left chamber of the heart, through the aortic valve and into the ascending aorta; expanding an occlusion member on the cardioplegia catheter so as to occlude the ascending aorta downstream of the coronary ostia and upstream of the brachiocephalic artery; delivering cardioplegic fluid through the coronary vasculature to the myocardium so as to arrest cardiac function; and circulating oxygenated blood in the patients arterial system downstream of the occlusion member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification