Catheter tip insulator
OwnerTrey Henry Achterhoff, Andrew L. De Kock +2inventors
InventorsTrey Henry Achterhoff, Andrew L. De Kock, Nathan Gaworski, Andrew Dauwalter
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Abstract
Various aspects of the present disclosure are directed towards apparatuses, systems and methods that may include a cardiac ablation catheter. The cardiac ablation catheter may include a handle, an elongated shaft, and a distal assembly including a tip electrode, a ring electrode, and an insulator preform.
Claims20
A cardiac ablation catheter comprising:
- a handle;
- an elongated shaft having a proximal end and a distal end, the proximal end extending distally from the handle;
- and
- a distal assembly having a proximal end and a distal end, the proximal end secured to the distal end of the shaft, the distal assembly comprising:
- a tip electrode at the distal end of the distal assembly;
- a first ring electrode located proximal of and spaced apart from the tip electrode, the first ring electrode having a distal leading end and a proximal trailing end;
- and
- an insulator preform comprising a proximal portion having a forward portion defining a first diameter, and a distal portion extending distally from the proximal portion, the distal portion having a distal face and a second diameter greater than the first diameter so as to define a radial shoulder, and a distal portion length,
- wherein the tip electrode extends distally from the distal face of the insulator preform, and the first ring electrode is disposed over the proximal portion such that the distal leading end of the first ring electrode abuts the radial shoulder of the insulator preform, and wherein the distal portion length defines a longitudinal spacing between the tip electrode and the first ring electrode distal leading end.
An ablation electrode assembly for a pulsed field ablation catheter, the ablation electrode assembly comprising:
- an insulator preform comprising a proximal portion having a forward portion defining a first diameter, and a distal portion extending distally from the proximal portion, the distal portion having a distal face and a second diameter greater than the first diameter so as to define a radial shoulder, and a distal portion length;
- a tip electrode extending distally from the distal face of the insulator preform;
- and
- a ring electrode disposed over the proximal portion of the insulator preform such that a distal leading end of the ring electrode abuts the radial shoulder of the insulator preform, and wherein the distal portion length of the insulator preform defines a longitudinal spacing between the tip electrode and the first ring electrode distal leading end.
The ablation electrode assembly of 15, wherein the distal portion of the insulator preform includes a distal opening in the distal face.
A method of making an ablation electrode assembly of a cardiac ablation catheter, the method comprising:
- providing an insulator preform comprising a proximal portion having a forward portion defining a first diameter, and a distal portion extending distally from the proximal portion, the distal portion having a distal face having a distal opening, a second diameter greater than the first diameter so as to define a radial shoulder, and a distal portion length;
- securing a tip electrode to the distal portion of the insulator preform so that the tip electrode extends distally from the distal face of the insulator preform;
- and
- securing a ring electrode over the proximal portion of the insulator preform such that a distal leading end of the ring electrode abuts the radial shoulder of the insulator preform, wherein the distal portion length of the insulator preform defines a longitudinal spacing between the tip electrode and the first ring electrode distal leading end.
Dependencies are inferred from the claim text.