Basket end effector with distal position sensor

Patent metadata

Field	Value
Publication number	US-12533185-B2
Application number	US-202318128054-A
Country	US
Kind code	B2
Filing date	Mar 29, 2023
Priority date	Dec 28, 2022
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

Systems and methods presented herein generally include a catheter with a basket assembly at a distal tip having an atraumatic structure on a distal portion of the basket assembly and a distal sensor coupled to the atraumatic structure. The basket assembly includes spines that collapse for delivery through a delivery sheath catheter and self-expand upon exiting a distal end of the delivery sheath catheter. The basket assembly can further include a proximal sensor coupled to a shaft of the catheter, and position signals from the shaft sensor and the distal sensor can be used to determine position of electrodes of the basket assembly when the basket assembly is pressed to tissue or another surface.

First claim

What is claimed is:

1 . An end effector of a catheter, the end effector comprising:
a support frame comprising a plurality of spines configured to self-expand away from a longitudinal axis from a proximal portion to a distal spine portion to form a basket configuration, the distal spine portion defining a cloverleaf structure disposed radially around the longitudinal axis, the cloverleaf structure defining a central cutout with a central area disposed about the longitudinal axis, the cloverleaf structure includes inner arcs defining a concave perimeter about the longitudinal axis; and an atraumatic structure covering a portion of the cloverleaf structure of the support frame so that only inner arcs of the cloverleaf structure extending towards the proximal portion are visible.

2 . The end effector of claim 1 , further comprising:
a plurality of jackets over the plurality of spines, wherein the plurality of jackets extend and over a majority of the cloverleaf structure such that the atraumatic structure comprises a respective distal portion of each jacket of the plurality of jackets.

3 . The end effector of claim 2 , wherein the inner arcs extend from distal ends of the plurality of jackets and between adjacent jackets of the plurality of jackets.

4 . The end effector of claim 2 , further comprising:
a sensor disposed between the cloverleaf structure and a distal portion of a jacket of the plurality of jackets; and a plurality of electrodes coupled to the plurality of spines such that a respective electrode of the plurality of electrodes is coupled to a respective spine of the plurality of spines.

5 . The end effector of claim 4 , the sensor being disposed in a distal direction in relation to a distal surface of the support frame in the basket configuration.

6 . The end effector of claim 4 , the sensor comprising a contact force sensor.

7 . The end effector of claim 4 , the sensor comprising a position sensor.

8 . The end effector of claim 7 , the position sensor comprising an inductive coil.

9 . The end effector of claim 7 , the position sensor comprising a magnetic sensor.

10 . The end effector of claim 1 , further comprising:
a plurality of electrodes positioned in pairs such that each spine comprises a respective electrode pair and such that the respective electrode pair of a spine does not longitudinally overlap an electrode pair of an adjacent spine.

11 . The end effector of claim 10 ,
wherein the plurality of electrodes comprises proximal pairs of electrodes and distal pairs of electrodes such that the proximal pairs of electrodes and distal pairs of electrodes are positioned in an alternating fashion on the plurality of spines, and wherein the proximal pairs of electrodes are entirely proximal of an equator of the basket configuration.

12 . The end effector of claim 10 , wherein each electrode of the plurality of electrodes comprises a body defining a hollow portion extending through the body of the electrode so that a spine can be inserted into the hollow portion and retained on the spine.

13 . The end effector of claim 12 , wherein each spine comprises a retention member configured to be compressed to allow an electrode to be moved over the retention member, and the retention member being configured to expand to inhibit movement of the electrode along the spine.

14 . The end effector of claim 10 , wherein the plurality of electrodes is configured to deliver electrical pulses for irreversible electroporation, the electrical pulses including a peak voltage of at least 900 volts (V).

15 . The end effector of claim 1 , wherein the plurality of spines is configured to form an approximately spherically-shaped basket assembly when in the basket configuration.

16 . The end effector of claim 1 , wherein the plurality of spines is configured to form an approximately oblate-spheroid basket assembly when in the basket configuration.

Assignees

• Biosense Webster Israel Ltd

Inventors

• Keyes Joseph Thomas
• Herrera Kevin Justin
• Jenkins Nathaniel

Classifications

• A61B2034/2051

  Electromagnetic tracking systems · CPC title

• A61B2018/1467

  using more than two electrodes on a single probe · CPC title

• A61B2018/00839

  Bioelectrical parameters, e.g. ECG, EEG · CPC title

• A61B2018/00767

  Voltage · CPC title

• A61B2018/00613

  Irreversible electroporation · CPC title