Intra-atrial apparatus and method of use thereof

• US 8,469,950 B2
• Filed: 02/03/2008
• Issued: 06/25/2013
• Est. Priority Date: 02/15/2007
• Status: Active Grant

• Current Assignee: CardioNova Ltd.
• Original Assignee: CardioNova Ltd.
• Inventors: Sela, Nathan, Stein, Uri
• Primary Examiner(s): Peffley, Michael
• Assistant Examiner(s): GOOD, SAMANTHA M
• Application Number:
  US12/526,796
• Publication Number:
  US 20100030204A1
• Time in Patent Office: 1,969 Days
• Field of Search: 606/20, 606/27, 606/41
• US Class Current: 606/27
• CPC Class Codes: A61B 18/02 by cooling, e.g. cryogenic techniques devices for cooling specific reflex points of the body within cell-life limits A61H39/06
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 2018/00214 Expandable means emitting energy, e.g. by elements carried thereon
• CPC Class Codes: A61B 2018/0022 Balloons
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/0212 using an instrument inserted into a body lumen, e.g. catheter
• CPC Class Codes: A61B 2018/1407 Loop
• CPC Class Codes: A61M 2025/1059 having different inflatable sections mainly depending on the response to the inflation pressure, e.g. due to different material properties
• CPC Class Codes: A61M 2025/1072 having balloons with two or more compartments
• CPC Class Codes: A61M 2025/1086 having a special balloon surface topography, e.g. pores, protuberances, spikes or grooves
• CPC Class Codes: A61M 2025/1097 with perfusion means for enabling blood circulation only while the balloon is in an inflated state, e.g. temporary by-pass within balloon
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence
• CPC Class Codes: A61M 25/1011 Multiple balloon catheters

Abstract

An intra-atrial ablation therapy apparatus is disclosed. The apparatus comprises a balloon adapted for intra-atrial inflation to fill at least part of the atrium, the balloon being adapted to permit a flow of blood from a pulmonary vein to a mitral valve when inflated in the atrium. The apparatus further comprises an inflation lumen being in fluid communication with the balloon and adapted for conducting an inflation fluid to the balloon. The apparatus also comprises an ablation tool connected to the catheter.

Claims

1. An intra-atrial ablation therapy apparatus comprising:

a plurality of balloons adapted for intra-atrial inflation to fill at least part of an atrium, said plurality of balloons being adapted to permit a flow of blood from a pulmonary vein to a mitral valve when inflated in the atrium, wherein said plurality of balloons are adapted to be spaced within the atrium so as to permit blood flow between said plurality of balloons when inflated in the atrium;

an inflation lumen being in fluid communication with said plurality of balloons and adapted for conducting an inflation fluid to said plurality of balloons, wherein said plurality of balloons is adapted to occupy at least 70% of an atrial volume when said plurality of balloons are adapted to be inflated in the atrium;

an expandable ablation tool configured as a loop, and a catheter adapted to deliver the ablation tool and said plurality of balloons to the atrium, wherein inflation of at least one of said plurality of balloons causes said ablation tool to expand and move towards an ablation location in the atrium, further comprising an arrangement of adjacent rings installed on a surface of at least one of said plurality of balloons, said ablation tool passing through and engaging said adjacent rings such that inflation of said at least one of said plurality of balloons causes a distance between said adjacent rings to increase due to the inflation of said at least one of said plurality of balloons, thereby causing said ablation tool to expand due to said increase of said distance between said adjacent rings.

2. The apparatus of claim 1, wherein said ablation tool comprises a cryo-ablation element.

3. The apparatus of claim 1, wherein said ablation tool comprises an ablation element which ablates by heating.