RF electrodes on multiple flexible wires for renal nerve ablation
First Claim
1. An apparatus, comprising:
- a sheath having a lumen and a length sufficient to access a patient'"'"'s renal artery relative to a percutaneous access location;
a catheter comprising a flexible shaft having a proximal end, a distal end, and a length, the length of the shaft sufficient to access a patient'"'"'s renal artery relative to the percutaneous access location, the shaft dimensioned for displacement within the lumen of the sheath and extendible beyond a distal tip of the sheath;
a plurality of elongated resilient members each mounted structurally independent of one another along a longitudinal length of the distal end of the shaft, the resilient members engaging the shaft at a plurality of longitudinally spaced-apart locations and extensible radially from the shaft at regions defined between the longitudinally spaced-apart engagement locations;
one or more electrodes mounted on each of the resilient members at the radially extensible regions; and
a plurality of conductors electrically coupled to the one or more electrodes and extending along the shaft of the catheter;
the elongated resilient members collapsible when encompassed within the lumen of the sheath and extensible radially outward from the shaft at the regions defined between the longitudinally spaced-apart engagement locations when the catheter and the resilient members are axially extended beyond the distal tip of the sheath, wherein a proximal end of the elongated resilient members is movable relative to the shaft, and wherein the electrodes are distributed about a perimeter of the catheter shaft to facilitate formation of a spiral lesion in a wall of the renal artery when the catheter and the resilient members are axially extended beyond the distal tip of the sheath.
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Accused Products
Abstract
A catheter includes a flexible shaft having a distal end dimensioned for deployment within a patient'"'"'s renal artery. A number of elongated resilient members are mounted along a longitudinal length of the distal end of the shaft, and are extensible radially from the shaft at regions defined between longitudinally spaced-apart engagement locations. One or more electrodes are mounted on each of the resilient members at the radially extensible regions. A number of conductors are electrically coupled to the electrodes and extend along the shaft of the catheter. The elongated resilient members are collapsible when encompassed within a lumen of an outer sheath and extensible radially outward from the shaft at the regions defined between the longitudinally spaced-apart engagement locations when the catheter and the resilient members are axially extended beyond the distal tip of the sheath. RF energy is delivered to the electrodes for ablating perivascular renal nerves.
1496 Citations
9 Claims
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1. An apparatus, comprising:
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a sheath having a lumen and a length sufficient to access a patient'"'"'s renal artery relative to a percutaneous access location; a catheter comprising a flexible shaft having a proximal end, a distal end, and a length, the length of the shaft sufficient to access a patient'"'"'s renal artery relative to the percutaneous access location, the shaft dimensioned for displacement within the lumen of the sheath and extendible beyond a distal tip of the sheath; a plurality of elongated resilient members each mounted structurally independent of one another along a longitudinal length of the distal end of the shaft, the resilient members engaging the shaft at a plurality of longitudinally spaced-apart locations and extensible radially from the shaft at regions defined between the longitudinally spaced-apart engagement locations; one or more electrodes mounted on each of the resilient members at the radially extensible regions; and a plurality of conductors electrically coupled to the one or more electrodes and extending along the shaft of the catheter; the elongated resilient members collapsible when encompassed within the lumen of the sheath and extensible radially outward from the shaft at the regions defined between the longitudinally spaced-apart engagement locations when the catheter and the resilient members are axially extended beyond the distal tip of the sheath, wherein a proximal end of the elongated resilient members is movable relative to the shaft, and wherein the electrodes are distributed about a perimeter of the catheter shaft to facilitate formation of a spiral lesion in a wall of the renal artery when the catheter and the resilient members are axially extended beyond the distal tip of the sheath. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification