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US 10,537,260 B2Granted
Varying diameter catheter distal end design for decreased distal hub size
AssigneeBiosense Webster (Israel) Ltd.
InventorsSteven Wu, Sungwoo Min, Vishav Aujla, Neil Merchant
Life of this patent
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Abstract
This disclosure is directed to a catheter having a basket-shaped electrode assembly with a high electrode density. The basket-shaped electrode assembly may have a plurality of spines, such as up to twelve, each with a plurality of electrodes, such as up to sixteen. The distal ends of the plurality of spines are joined at a distal hub, all of which are fashioned from a single piece of superelastic material.
Claims19
A catheter comprising:
- an elongated catheter body extending along a longitudinal axis, the elongated catheter body having a proximal end and a distal end;
- a flexible wire assembly positioned at the distal end of the elongated catheter body formed from a single piece of shape memory material, the flexible wire assembly having a plurality of spines, each spine having a proximal end and a distal end, each distal end extending from a distal hub having a stress-relieving edge;
- a plurality of electrodes and cabling attached to each spine, the plurality of electrodes and cabling having a corresponding plurality of wires coiled on a core and covered by a sheath such that each electrode is attached through the sheath to one of the plurality of wires, such that the catheter has one operational state wherein the spines bow radially outwardly from the distal hub and another operational state wherein the spines are arranged generally along a longitudinal axis of the catheter body.
A method for forming a catheter comprising:
- forming an elongate catheter body;
- forming a plurality of spines and a connecting distal hub from a single piece of shape memory material, each spine having a proximal end and a distal end, each distal end extending from the distal hub;
- forming a stress-relieving edge onto a distal end of the distal hub at a location opposite of the plurality of spines;
- heating the flexible wire assembly to heat set a basket-shaped arrangement;
- connecting a plurality of electrodes and cabling to each of the plurality of spines to form a basket-shaped electrode assembly, the plurality of electrodes and cabling having a corresponding plurality of wires coiled on a core and covered by a sheath such that each electrode is attached through the sheath to one of the plurality of wires, such that the catheter has one operational state wherein the spines bow radially outwardly from the distal hub and another operational state wherein the spines are arranged generally along a longitudinal axis of the catheter body;
- and
- connecting the basket shaped electrode assembly to a distal end of the elongate catheter body.
4 more elements
Dependencies are inferred from the claim text.