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US 2017/0319140 A1Published application
Basket-shaped catheter with improved distal hub
AssigneeBiosense Webster (Israel) Ltd.
InventorsSteven Wu, Sungwoo Min, Vishav Aujla, Neil Merchant, Shubhayu Basu, Stuart Williams, Ryan Hoitink
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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.
Claims21
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 flexible wires, each flexible wire having a proximal end and a distal end, the flexible wire assembly further having a distal hub extending from the distal ends of at least a portion of the plurality of flexible wires, the distal hub configured to be generally parallel to the longitudinal axis of the elongated catheter body when the catheter is in a first operational state and generally perpendicular to the longitudinal axis of the elongated catheter body when the catheter is in a second operational state;
- a plurality of spines formed from the plurality of flexible wires;
- and
- 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 spines bow radially outwardly in the second operational state and are arranged generally along the longitudinal axis of the catheter body in the first operational state.
2 more elements
A method for forming a catheter comprising:
- forming an elongate catheter body;
- forming a flexible wire assembly from a single piece of shape memory material, the flexible wire assembly having a plurality of flexible wires joined at a distal hub;
- forming a stress-relieving edge onto a distal end of the distal hub at a location opposite of the plurality of flexible wires;
- 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 flexible wires to form a basket-shaped electrode assembly;
- and
- connecting the basket shaped electrode assembly to a distal end of the elongate catheter body.
4 more elements
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 flexible wires, each flexible wire having a proximal end and a distal end, the flexible wire assembly further having a distal hub extending from the distal ends of at least a portion of the plurality of flexible wires, the distal hub configured to be generally parallel to the longitudinal axis of the elongated catheter body when the catheter is in a first operational state and generally perpendicular to the longitudinal axis of the elongated catheter body when the catheter is in a second operational state, wherein the distal hub further comprises a stress-relieving edge and wherein the stress relieving edge has a first diameter in the first operational state and a second diameter in the second operational state, the first diameter being greater than the second;
- a plurality of spines formed from the plurality of flexible wires;
- and
- 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 spines bow radially outwardly in the second operational state and are arranged generally along the longitudinal axis of the catheter body in the first operational state.
2 more elements
Dependencies are inferred from the claim text.