Ablation catheters and associated systems and methods
First Claim
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1. A catheter assembly, comprising:
- an elongated body having a proximal region and a distal region extending along a longitudinal axis, wherein the distal region of the body is configured for intravascular delivery to a body lumen of a human patient;
a pre-shaped spiral structure associated with the distal region of the elongated body, wherein the spiral structure is transformable between a low-profile configuration and an expanded configuration; and
a plurality of electrodes spaced apart along the spiral structure, wherein each of the electrodes comprises a wire wound about a corresponding length of the spiral structure,wherein, when the spiral structure is in the expanded configuration, the spiral structure comprises a plurality of loops longitudinally spaced apart from each other and extending lengthwise along a central loop axis parallel with the longitudinal axis of the elongated body, andwherein the electrodes are disposed along the loops and configured to apply energy in a lesion pattern along a length of the body lumen of the human patient.
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Abstract
An ablation catheter assembly including an elongate catheter body having a proximal portion, a distal portion and a lumen therethrough. A helical structure associated with the catheter distal portion carries a plurality of independently operable electrodes and is transformable between a low-profile configuration wherein a straightening element is positioned in the lumen and an expanded configuration wherein the straightening element is at least partially retracted from the spiral structure. When the helical structure is in the expanded configuration, a laterally offset tip portion extends distally therefrom.
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Citations
21 Claims
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1. A catheter assembly, comprising:
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an elongated body having a proximal region and a distal region extending along a longitudinal axis, wherein the distal region of the body is configured for intravascular delivery to a body lumen of a human patient; a pre-shaped spiral structure associated with the distal region of the elongated body, wherein the spiral structure is transformable between a low-profile configuration and an expanded configuration; and a plurality of electrodes spaced apart along the spiral structure, wherein each of the electrodes comprises a wire wound about a corresponding length of the spiral structure, wherein, when the spiral structure is in the expanded configuration, the spiral structure comprises a plurality of loops longitudinally spaced apart from each other and extending lengthwise along a central loop axis parallel with the longitudinal axis of the elongated body, and wherein the electrodes are disposed along the loops and configured to apply energy in a lesion pattern along a length of the body lumen of the human patient. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A catheter assembly, comprising:
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an elongated body having a proximal region, a distal region extending along a longitudinal axis, and a lumen therethrough, wherein the distal region of the body is configured for intravascular delivery to a blood vessel of a human patient; a pre-shaped spiral structure at the distal region of the elongated body, wherein the spiral structure includes a lumen therethrough, wherein the spiral structure is selectively transformable between— a delivery state wherein a stylet or guide wire is positioned in the lumen of the spiral structure; and an expanded state wherein the stylet or guide wire is at least partially retracted from the spiral structure toward the proximal region of the elongated body; and a plurality of energy delivery elements spaced apart along the spiral structure, wherein each energy delivery element comprises a flexible coil wound about a corresponding length of the spiral structure, wherein the spiral structure, in the expanded state, comprises a plurality of loops spaced longitudinally apart from each other and extending lengthwise along a central loop axis generally parallel with the longitudinal axis of the elongated body, and wherein the electrodes are disposed along the loops and configured to apply energy in a lesion pattern along a length of the blood vessel of the human patient. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification