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US 12,727,940 B2Granted
Systems, devices, and methods for ablation of endocardial tissue
AssigneeBoston Scientific Scimed, Inc.
InventorsRaju Viswanathan, Allan Zingeler, Gary Long, Jean-Luc Pageard, Brittney Hachey
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Abstract
Systems, devices, and methods for electroporation ablation therapy are disclosed, with the device including a set of splines coupled to a catheter for medical ablation therapy. Each spline of the set of splines may include a set of electrodes formed on that spline. The set of splines may be configured for translation to transition between a first configuration and a second configuration. The devices described herein may be used to form a lesion via ablation by irreversible electroporation.
Claims20
A catheter for ablation of endocardial tissue through irreversible electroporation, the catheter comprising:
- a catheter shaft defining a longitudinal axis and having a proximal end, a distal end opposite the proximal end, and a shaft lumen therethrough;
- an inner shaft disposed within the shaft lumen;
- a set of splines extending from the distal end of the catheter shaft, each spline of the set of splines including a set of ablation electrodes disposed thereon, wherein each of the splines has a proximal end attached to the distal end of the catheter shaft, a distal end attached to a distal end of the inner shaft, and an intermediate portion adapted to be radially displaceable away from the longitudinal axis,
- wherein the inner shaft is movable within the shaft lumen by up to about 60 millimeters along the longitudinal axis from a first inner shaft position defining a first configuration of the set of splines to a second inner shaft position defining a second configuration of the set of splines, wherein movement of the inner shaft along the longitudinal axis causes the set of splines to transition between the first configuration and the second configuration, and
- wherein in the first configuration the distal end of each spline is located at a first distance from the distal end of the catheter shaft, and
- wherein in the second configuration:
- the distal end of each spline is located at a second distance from the distal end of the catheter shaft, wherein the second distance is less than the first distance, and
- the set of splines are arranged as a set of loops, each loop extending generally perpendicular to the longitudinal axis, wherein each loop of the set of loops partially overlaps with an adjacent loop, and
- wherein the ablation electrodes are positioned along each spline such that a length of each spline between and including its respective ablation electrodes does not overlap with an adjacent spline, when viewed along the longitudinal axis, when the set of splines is in the second configuration.
6 more elements
A catheter for ablation of endocardial tissue through irreversible electroporation, the catheter comprising:
- a catheter shaft defining a longitudinal axis and having a proximal end, a distal end opposite the proximal end, and a shaft lumen therethrough;
- an inner shaft disposed within the shaft lumen;
- a set of splines extending from the distal end of the catheter shaft, each spline of the set of splines including a set of ablation electrodes disposed thereon, wherein each of the splines has a proximal end attached to the distal end of the catheter shaft, a distal end attached to a distal end of the inner shaft, and an intermediate portion adapted to be radially displaceable away from the longitudinal axis,
- wherein the inner shaft is movable within the shaft lumen by up to about 60 millimeters along the longitudinal axis from a first inner shaft position defining a first configuration of the set of splines to a second inner shaft position defining a second configuration of the set of splines, wherein movement of the inner shaft along the longitudinal axis causes the set of splines to transition between the first configuration and the second configuration, and
- wherein in the first configuration the distal end of each spline is located at a first distance from the distal end of the catheter shaft,
- wherein in the second configuration the set of splines are arranged as a set of loops with each loop extending generally perpendicular to the longitudinal axis, and the distal end of each spline is located at a second distance from the distal end of the catheter shaft, the second distance being less than the first distance, and
- wherein the ablation electrodes are positioned along each respective spline to prevent a length of each spline between and including its respective ablation electrodes from overlapping with any adjacent spline, when viewed along the longitudinal axis, when the set of splines is in the second configuration.
4 more elements
A catheter for ablation of endocardial tissue through irreversible electroporation, the catheter comprising:
- a catheter shaft defining a longitudinal axis and having a proximal end, a distal end opposite the proximal end, and a shaft lumen therethrough;
- an inner shaft disposed within the shaft lumen;
- a set of splines extending from the distal end of the catheter shaft, each spline of the set of splines including a set of ablation electrodes disposed thereon, wherein each of the splines has a proximal end attached to the distal end of the catheter shaft, a distal end attached to a distal end of the inner shaft, and an intermediate portion adapted to be radially displaceable away from the longitudinal axis,
- wherein the inner shaft is movable within the shaft lumen by up to about 60 millimeters along the longitudinal axis from a first inner shaft position defining a first undeployed configuration of the set of splines to a second inner shaft position defining a second fully deployed configuration of the set of splines, wherein movement of the inner shaft along the longitudinal axis causes the set of splines to transition between the first configuration and the second configuration,
- wherein in the first undeployed configuration each spline of the set of splines extends generally parallel to the longitudinal axis, and the distal end of each spline is located at a first distance from the distal end of the catheter shaft, and
- wherein in the second fully deployed configuration:
- the distal end of each spline is located at a second distance from the distal end of the catheter shaft, wherein the second distance is less than the first distance, and
- each spline of the set of splines forms a twisted loop, wherein each loop extends generally perpendicular to the longitudinal axis and partially overlaps an adjacent spline, and
- wherein the ablation electrodes are positioned along each spline such that a length of each spline between and including its respective ablation electrodes does not overlap with an adjacent spline, when viewed along the longitudinal axis, when the set of splines is in the second fully deployed configuration.
6 more elements
Dependencies are inferred from the claim text.