Catheter with arcuate end section
First Claim
Patent Images
1. A medical device, comprising:
- an insertion shaft, having a longitudinal axis and having a distal end adapted for insertion into a body of a patient;
a resilient end section, which is fixed to the distal end of the insertion shaft and is formed so as to define, when unconstrained, an arc oriented obliquely relative to the axis and having a center of curvature on the axis, the arc having a radius of curvature, when unconstrained, between 7.5 mm and 15 mm; and
one or more electrodes disposed at respective locations along the end section.
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Abstract
A medical device includes an insertion shaft, having a longitudinal axis and having a distal end adapted for insertion into a body of a patient. A resilient end section is fixed to the distal end of the insertion shaft and is formed so as to define, when unconstrained, an arc oriented obliquely relative to the axis and having a center of curvature on the axis. One or more electrodes are disposed at respective locations along the end section.
261 Citations
21 Claims
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1. A medical device, comprising:
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an insertion shaft, having a longitudinal axis and having a distal end adapted for insertion into a body of a patient; a resilient end section, which is fixed to the distal end of the insertion shaft and is formed so as to define, when unconstrained, an arc oriented obliquely relative to the axis and having a center of curvature on the axis, the arc having a radius of curvature, when unconstrained, between 7.5 mm and 15 mm; and one or more electrodes disposed at respective locations along the end section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A medical device, comprising:
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an insertion shaft, having a longitudinal axis and having a distal end adapted for insertion through a body passage into a cavity within a body of a patient; a resilient end section, which comprises a base, which is connected to the distal end of the insertion shaft, and a tip, and which is formed so as to define, when unconstrained, an arc that is oriented obliquely relative to the axis and has a helical form such that the tip protrudes axially in a distal direction relative to the base; and one or more electrodes disposed at respective locations along the end section, the one or more electrodes comprising a tip electrode extending over the tip and a plurality of proximal electrodes distributed along the end section, wherein the end section is configured so that when the unconstrained end section is advanced axially against a tissue surface in the body, the end section engages the tissue surface along the arc so that the tip electrode and at least some of the proximal electrodes contact the tissue surface simultaneously, wherein the insertion shaft is configured to be rotated about the axis, so as to cause the arc to describe an annular path on the tissue.
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12. Medical apparatus, comprising:
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a probe for insertion into a body of a patient, the probe comprising; an insertion shaft, having a longitudinal axis and having a distal end adapted for insertion into the body; a resilient end section, which is fixed to the distal end of the insertion shaft and is formed so as to define, when unconstrained, an arc oriented obliquely relative to the axis, subtending 180° and
having a center of curvature on the axis; andone or more electrodes disposed at respective locations along the end section and configured to contact tissue in the body; and a radio frequency (RF) generator, which is coupled to supply RF energy through the probe to at least one of the electrodes so as to ablate the tissue. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method for medical treatment, comprising:
- inserting into a body of a patient a probe comprising an insertion shaft, having a longitudinal axis and a distal end, and a resilient end section, which is fixed to the distal end of the insertion shaft and is formed so as to define, when unconstrained, an arc oriented obliquely relative to the axis and having a center of curvature on the axis, with electrodes disposed at respective locations along the end section;
advancing the probe axially so that the end section engages a tissue in the body along the arc, causing at least some of the electrodes to contact the tissue simultaneously; and
rotating the insertion shaft about the axis, so as to cause the arc to describe an annular path on the tissue while the at least some of the electrodes contact the tissue. - View Dependent Claims (19, 20, 21)
- inserting into a body of a patient a probe comprising an insertion shaft, having a longitudinal axis and a distal end, and a resilient end section, which is fixed to the distal end of the insertion shaft and is formed so as to define, when unconstrained, an arc oriented obliquely relative to the axis and having a center of curvature on the axis, with electrodes disposed at respective locations along the end section;
Specification