Ablation catheter assembly and method for isolating a pulmonary vein
First Claim
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1. A catheter assembly, comprising:
- a catheter body including;
a proximal portion, an intermediate portion extending from the proximal portion, the intermediate portion defining a longitudinal axis, and a distal portion extending from the intermediate portion and terminated by a distal end of the catheter body, the distal portion forming a coil about a central loop axis, the central loop axis substantially parallel to the longitudinal axis,an ablation section formed along the coil,wherein the segment, the distal segment being more flexible than the proximal segment such that the distal portion more easily deflects relative to the proximal segment,a first lumen extending through the proximal portion and the intermediate portion to the distal portion and terminated at an opening proximal to the ablation section;
a second lumen extending through a proximal portion of a catheter body and an intermediate portion of the catheter body and terminating at a closed end distal to the ablation section; and
an ablation electrode formed within the ablation section;
wherein, when the ablation electrode is activated, a lesion is formed in tissue contacting the ablation section.
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Abstract
A catheter body includes a proximal portion, an intermediate portion extending from the proximal portion and defining a longitudinal axis, and a distal portion extending from the intermediate portion and terminated by a distal end of the catheter body; the distal portion forms a coil about a central loop axis, which is substantially parallel to the longitudinal axis. A first lumen extends through the proximal and intermediate portions of the catheter body and is terminated at an opening proximal to an ablation section, which is formed along the coil.
252 Citations
21 Claims
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1. A catheter assembly, comprising:
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a catheter body including; a proximal portion, an intermediate portion extending from the proximal portion, the intermediate portion defining a longitudinal axis, and a distal portion extending from the intermediate portion and terminated by a distal end of the catheter body, the distal portion forming a coil about a central loop axis, the central loop axis substantially parallel to the longitudinal axis, an ablation section formed along the coil, wherein the segment, the distal segment being more flexible than the proximal segment such that the distal portion more easily deflects relative to the proximal segment, a first lumen extending through the proximal portion and the intermediate portion to the distal portion and terminated at an opening proximal to the ablation section; a second lumen extending through a proximal portion of a catheter body and an intermediate portion of the catheter body and terminating at a closed end distal to the ablation section; and an ablation electrode formed within the ablation section; wherein, when the ablation electrode is activated, a lesion is formed in tissue contacting the ablation section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for forming an ablation pattern to electrically isolate a pulmonary vein for treatment of cardiac arrhythmia, comprising:
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passing a shaping device through a first lumen extending through a proximal portion of a catheter body and an intermediate portion of the catheter body and terminating at a closed end distal to an ablation section comprising a coil disposed on the catheter body proximate a distal portion of the catheter body and extending from the intermediate portion, wherein the distal portion is more flexible than the remainder of the catheter body such that the distal portion more easily deflects relative to the remainder of the catheter body passing a locating device through a second lumen extending through a proximal portion of a catheter body and an intermediate portion of the catheter body and terminating in an opening proximal to the ablation section; passing a distal tip of the locating device through the distal portion of the catheter body to locate a pulmonary vein from within a left atrium; and advancing the catheter body over the locating device; and pressing the ablation section against tissue surrounding the pulmonary vein. - View Dependent Claims (20, 21)
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Specification