Endoscopic cardioplegia infusion cannula and method of use
First Claim
1. A method of inserting a cannula into the ascending aorta and infusing cardioplegic solution therein, the cannula having an elongated cannula body with an angled bend formed in a distal end thereof, an occlusion balloon positioned at the distal end of the elongated cannula body, and an outer sheath surrounding the elongated cannula body and dimensioned for axial movement there along, the method comprising:
- inserting the elongated cannula body into a body cavity;
positioning the distal end of the elongated cannula body over the ascending aorta;
incising the aorta in the center of a pursestring suture previously formed in the ascending aorta;
inserting the distal end of the elongated cannula body into the ascending aorta and inflating the occlusion balloon therein;
drawing the pursestring suture around the elongated cannula body;
advancing the outer sheath until the distal end thereof is in contact with the ascending aorta thereby compressing a portion of the ascending aorta between the distal end of the outer sheath and the occlusion balloon; and
infusing a cardioplegic solution into the ascending aorta proximate to the occlusion balloon so that the cardioplegic solution perfuses into the coronary arteries.
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Accused Products
Abstract
An endoscopic cardioplegic infusion cannula and its method of use is provided for occluding the ascending aorta and infusing cardioplegic fluid into the coronary arteries. A cannula is inserted suprasternally and the distal end of the cannula is inserted into the ascending aorta. An occlusion balloon on the distal end of the cannula is inflated and occludes the ascending aorta. Cardioplegic fluid is infused through the cannula proximal to the occlusion balloon and perfused into the coronary arteries. In order to effect a better seal where the distal end of the cannula is inserted into the ascending aorta, an outer sheath having a flange is advanced over the cannula into contact with the ascending aorta to compress a portion of the ascending aorta between the flange and the occlusion balloon. Cardiopulmonary bypass is effected in a known manner to supply the patient with oxygenated blood. The cannula and its method of use can be used in a closed or open chest procedure. Sternal lifting is used in conjunction with the present invention to create a greater working space over the heart.
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Citations
37 Claims
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1. A method of inserting a cannula into the ascending aorta and infusing cardioplegic solution therein, the cannula having an elongated cannula body with an angled bend formed in a distal end thereof, an occlusion balloon positioned at the distal end of the elongated cannula body, and an outer sheath surrounding the elongated cannula body and dimensioned for axial movement there along, the method comprising:
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inserting the elongated cannula body into a body cavity; positioning the distal end of the elongated cannula body over the ascending aorta; incising the aorta in the center of a pursestring suture previously formed in the ascending aorta; inserting the distal end of the elongated cannula body into the ascending aorta and inflating the occlusion balloon therein; drawing the pursestring suture around the elongated cannula body; advancing the outer sheath until the distal end thereof is in contact with the ascending aorta thereby compressing a portion of the ascending aorta between the distal end of the outer sheath and the occlusion balloon; and infusing a cardioplegic solution into the ascending aorta proximate to the occlusion balloon so that the cardioplegic solution perfuses into the coronary arteries. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of closed-chest cannulation of the ascending aorta and infusing cardioplegic solution therein, including a cannula having an elongated cannula body with an angled bend formed in a distal end thereof, an occlusion balloon positioned at the distal end of the elongate cannula body, and an outer sheath surrounding the elongated cannula body and dimensioned for axial movement therealong, the method comprising:
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lifting the sternum to create a space above the heart area; providing a pursestring suture in the ascending aorta; suprasternal insertion of the elongated cannula body and positioning the distal end of the cannula body above the ascending aorta; incising the ascending aorta in the center of the pursestring suture; inserting the distal end of the elongated cannula body into the ascending aorta; drawing the pursestring suture around the elongated cannula body to create a seal and prevent leakage; inflating the occlusion balloon in the ascending aorta; advancing the outer sheath, which has a flange on its distal end, so that the flange is in contact with the outside of the ascending aorta, thereby compressing the ascending aorta between the flange and the occlusion balloon; and infusing a cardioplegic solution into the ascending aorta proximate to the occlusion balloon so that the cardioplegic solution perfuses into the coronary arteries. - View Dependent Claims (10, 11, 12, 15)
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13. A cannula for insertion into the ascending aorta, comprising:
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an elongated cannula body having a distal end and a proximal end; an angled bend formed in the distal end of the elongated cannula body; an occlusion balloon positioned at the distal end of the elongated cannula body; and a sheath having a sufficiently flexible distal end for facilitating movement around an angle of varying degrees, a proximal end, and dimensioned to slidably advance and retract over the elongated cannula body so that when the distal end of the elongated cannula body is inserted into the ascending aorta the sheath can be advanced distally until a portion of the ascending aorta is positioned between the occlusion balloon and the distal end of the sheath. - View Dependent Claims (14, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A cannula for insertion into the ascending aorta, comprising:
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an elongated cannula body having a distal end and a proximal end; an angled bend formed in the distal end of the elongated cannula body; an expandable member on the distal end of the elongated cannula body for occluding the ascending aorta; and an outer sheath disposed over a portion of the elongated cannula body and dimensioned for sliding movement over the elongated cannula body, the outer sheath having a sufficiently flexible distal end for facilitating movement around an angle of varying degrees, a proximal end and a flange on the distal end so that when the distal end of the elongated cannula body is inserted into the ascending aorta, the outer sheath can be advanced until a portion of the ascending aorta is positioned between the expandable member and the flange on the outer sheath. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification