Method for transmural ablation
First Claim
Patent Images
1. A method for creating an electrically isolating line of ablated tissue on a hollow organ or vessel having opposing walls comprising:
- a) bringing the opposing walls of the organ or vessel into contact with each other along a line; and
b) passing sufficient electrical current through both walls along the line of contact to form a corresponding line of ablated tissue through both walls of the tissue without bonding the walls together.
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Abstract
A method for transmural ablation using an instrument containing two electrodes or cryogenic probes. A clamping force is exerted on the two electrodes or probes such that the tissue of the hollow organ is clamped therebetween. Bipolar RF energy is then applied between the two electrodes, or the probes are cryogenically cooled, thus ablating the tissue therebetween. A monitoring device measures a suitable parameter, such as impedance or temperature, and indicates when the tissue between the electrodes has been fully ablated.
73 Citations
30 Claims
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1. A method for creating an electrically isolating line of ablated tissue on a hollow organ or vessel having opposing walls comprising:
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a) bringing the opposing walls of the organ or vessel into contact with each other along a line; and
b) passing sufficient electrical current through both walls along the line of contact to form a corresponding line of ablated tissue through both walls of the tissue without bonding the walls together. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for creating an electrically isolating line of ablated tissue on a hollow organ or vessel having opposing walls comprising:
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a) bringing the opposing walls of the organ or vessel into contact with each other along a line and for a distance on both sides of the line; and
b) ablating the tissue in both walls along the line of contact sufficient to form a corresponding line of ablated tissue through both walls of the tissue without bonding the walls together. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method for at least partially electrically isolating a pulmonary vein from a heart atrium, the atrium having opposed walls, comprising:
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bringing together opposed walls of the atrium proximal to the pulmonary vein into contact with each other along a line;
ablating the tissue in both walls along the line of contact sufficient to form a corresponding line of ablated tissue across both walls of the tissue without bonding the walls together;
performing the foregoing steps a plurality of times, each time partially circumscribing the pulmonary vein and performing the steps a sufficient number of times to form a series of lines of ablated tissued that together substantially fully circumscribes the pulmonary vein.
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18. A method for creating a lesion to electrically isolate the pulmonary veins from the atrium, said pulmonary veins and atrium each being hollow and having opposed walls, the method comprising:
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a) providing a clamping device with opposing jaws capable of grasping tissue;
b) positioning one of either said atrium or pulmonary vein between the opposing jaws of the clamping device;
c) closing the jaws on the one of either said atrium or pulmonary vein to form a clamping area having a width so that the opposed walls come into contact along the clamping area and said clamping area width is expressed of blood between the opposed walls; and
d) ablating the tissue clamped between the jaws to create a line of ablated tissue through both of the walls without bonding them together. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A method for creating a line of electrical blockage around a pulmonary vein comprising of:
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a) providing a clamping device having jaws capable of grasping tissue;
b) positioning the pulmonary vein within the jaws of the clamping device;
c) clamping the vein so that the tissue is compressed between the jaws of the clamping device;
d) ablating the clamped tissue to create a continuous transmural lesion around the entire circumference of the pulmonary vein; and
e) removing the clamping device so that the pulmonary vein lumen opens. - View Dependent Claims (26, 27, 28)
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29. A method of creating a transmural ablation line in atrial tissue comprising:
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providing a tissue grasping apparatus comprising first and second grasping jaws, each jaw including a raised electrode and a clamping surface receding from the electrode in face-to-face relation with the electrode and clamping surface of the other jaw, said grasping jaws being relatively moveable, with the clamping surfaces of said jaws comprising an insulating material, the raised face-to-face electrodes being of opposite polarity and connected to a power source for providing an electrical current between said electrodes;
closing the jaws of the tissue grasping apparatus on the atrial tissue proximal to the pulmonary veins so that the electrodes are entirely in contact with the atrial tissue to be ablated;
creating a current flow between said electrodes and through the atrial tissue located between the closed jaws to create a transmural ablation through said atrial tissue.
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30. A method for creating a lesion to isolate a pair of pulmonary veins from the body of the atrium, comprising:
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a) providing a clamping device with opposing jaws capable of grasping tissue;
b) positioning the atrial tissue proximal to the pulmonary veins between the jaws;
c) closing the jaws to compress the atrial tissue so the opposed walls come into contact along a clamping area; and
d) ablating the tissue clamped between the jaws to create a line of ablated tissue through both of the walls without bonding the walls together.
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Specification