Method and apparatus for tissue ablation

• US 8,262,649 B2
• Filed: 07/27/2007
• Issued: 09/11/2012
• Est. Priority Date: 04/26/2001
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Francischelli, David E.
• Primary Examiner(s): ROANE, AARON F
• Application Number:
  US11/881,422
• Publication Number:
  US 20070270799A1
• Time in Patent Office: 1,873 Days
• Field of Search: 606/41, 606 49- 51, 607/99, 607/129
• US Class Current: 606/23
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• CPC Class Codes: A61B 18/1442 Probes having pivoting end effectors, e.g. forceps
• CPC Class Codes: A61B 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 2018/00994 combining two or more different kinds of non-mechanical energy or combining one or more non-mechanical energies with ultrasound
• CPC Class Codes: A61B 2018/126 bipolar
• CPC Class Codes: A61B 2018/1472 for use with liquid electrolyte, e.g. virtual electrodes

Abstract

A method for ablation in which a portion of atrial tissue around the pulmonary veins of the heart is ablated by a first elongated ablation component and a second elongated ablation component movable relative to the first ablation component and having means for magnetically attracting the first and second components toward one another. The magnetic means draw the first and second components toward one another to compress the atrial tissue therebetween, along the length of the first and second components and thereby position the device for ablation of the tissue.

Claims

1. A tissue ablation device comprising:

a first component comprising a first magnetically attractive element, a portion of the first component being manually shapeable, wherein the first component is a first ablation component comprising a cryo-ablation component for delivery of cryo-ablation energy; and

,

a second component comprising a second magnetically attractive element for magnetically attracting the first and second components toward one another, the second component additionally being mechanically coupled to the first component;

a portion of the second component being sufficiently flexible to be deflected into alignment with the first component by the magnetically attractive elements.

2. A system as in claim 1 wherein the second component is a second ablation component for delivery of an ablation energy.

3. A system as in claim 1 wherein at least one of the magnetically attractive elements comprises a rare earth magnet.

4. A system as in claim 1 wherein at least one of the magnetically attractive elements comprises an electromagnet.

5. A system as in claim 1 wherein the first and second components are pivotally coupled to one another.

6. A system as in claim 1 wherein the first and second components comprise jaws of a hemostat.