Transmural ablation device
First Claim
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1. A device for clamping and ablating cardiac tissue comprising:
- a first handle member;
a second handle member;
first and second opposed jaws associated with the first and second handle members, respectively, the jaws being movable by the handle members between a first open position and a second clamped position;
a first electrical conductive member carried by the first jaw;
a second electrical conductive member carried by the second jaw;
at least one jaw including a surface for engaging tissue clamped between the jaws, the surface comprising insulative material, an aperture extending through the insulative material and the respective conductive member of such jaw being carried at least in part in the jaw and conductive of electrical energy through the aperture to tissue clamped between the jaws;
such conductive member having a width within the jaw greater than the width of the aperture and including a solid, electrically conductive surface for engaging cardiac tissue clamped between the jaws.
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Abstract
A method and apparatus 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.
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Citations
20 Claims
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1. A device for clamping and ablating cardiac tissue comprising:
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a first handle member; a second handle member; first and second opposed jaws associated with the first and second handle members, respectively, the jaws being movable by the handle members between a first open position and a second clamped position; a first electrical conductive member carried by the first jaw; a second electrical conductive member carried by the second jaw; at least one jaw including a surface for engaging tissue clamped between the jaws, the surface comprising insulative material, an aperture extending through the insulative material and the respective conductive member of such jaw being carried at least in part in the jaw and conductive of electrical energy through the aperture to tissue clamped between the jaws;
such conductive member having a width within the jaw greater than the width of the aperture and including a solid, electrically conductive surface for engaging cardiac tissue clamped between the jaws. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A tissue grasping apparatus comprising:
first and second grasping jaws, the grasping jaws being relatively moveable between open and closed positions;
each jaw including an electrode and a clamping surface in opposed relation with the electrode and clamping surface of the other jaw;
the clamping surfaces of the jaws comprising an insulating material, defining an elongated aperture having a width, and at least one of the opposed electrodes being carried at least in part within the jaw, the electrode having a width within the jaw greater than the width of the elongated aperture and including a solid, electrically conductive surface for engaging cardiac tissue clamped between the jaws; and
such electrode being connectible to a power source for providing an electrical current through tissue clamped between the electrodes.- View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
Specification