US 10,888,373 B2
Contact assessment between an ablation catheter and tissue
Josef Vincent Koblish, Sunnyvale, CA (US); Donghoon Chun, Sunnyvale, CA (US); and Jessi E. Johnson, Sunnyvale, CA (US)
Assigned to Epix Therapeutics, Inc., Santa Clara (CA)
Filed by EPiX Therapeutics, Inc., Santa Clara, CA (US)
Filed on Oct. 9, 2018, as Appl. No. 16/155,814.
Application 16/155,814 is a continuation of application No. PCT/US2018/029639, filed on Apr. 26, 2018.
Claims priority of provisional application 62/536,616, filed on Jul. 25, 2017.
Claims priority of provisional application 62/491,082, filed on Apr. 27, 2017.
Prior Publication US 2019/0038348 A1, Feb. 7, 2019
Int. Cl. A61B 18/12 (2006.01); A61B 18/14 (2006.01); A61B 5/00 (2006.01); A61B 18/02 (2006.01); A61B 90/00 (2016.01); A61B 5/053 (2006.01); A61B 18/00 (2006.01); A61B 18/18 (2006.01); A61B 5/01 (2006.01); A61B 5/042 (2006.01)
CPC A61B 18/1492 (2013.01) [A61B 5/0538 (2013.01); A61B 5/4836 (2013.01); A61B 5/6885 (2013.01); A61B 18/02 (2013.01); A61B 18/1206 (2013.01); A61B 90/06 (2016.02); A61B 5/01 (2013.01); A61B 5/042 (2013.01); A61B 18/1815 (2013.01); A61B 2018/00011 (2013.01); A61B 2018/00029 (2013.01); A61B 2018/00357 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/00702 (2013.01); A61B 2018/00791 (2013.01); A61B 2018/00839 (2013.01); A61B 2018/00875 (2013.01); A61B 2018/00892 (2013.01); A61B 2018/00982 (2013.01); A61B 2018/126 (2013.01); A61B 2018/1417 (2013.01); A61B 2018/1467 (2013.01); A61B 2090/065 (2016.02); A61B 2218/002 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for facilitating contact assessment between an electrode assembly of an ablation catheter and viable body tissue, the method comprising:
obtaining a first detected voltage between a first electrode and a second electrode, wherein the first and second electrodes are positioned along an electrode assembly of the ablation catheter, and wherein the first electrode is distal to the second electrode;
obtaining a second detected voltage between the second electrode and a third electrode, the third electrode positioned proximal to the second electrode;
making a first comparison between the first detected voltage and a first threshold voltage, wherein the first threshold voltage is indicative of a level of contact between viable body tissue and a first portion of the ablation catheter, the first portion of the ablation catheter positioned at a location between the first and second electrodes; and
making a second comparison between the second detected voltage and a second threshold voltage, wherein the second threshold voltage is indicative of a level of contact between viable body tissue and a second portion of the ablation catheter, the second portion of the ablation catheter positioned at a location between the second and third electrodes;
the level of contact between viable body tissue and the first portion of the ablation catheter is determined by comparing the first voltage to the first threshold voltage;
the level of contact between viable body tissue and the second portion of the ablation catheter is determined by comparing the second voltage to the second threshold voltage;
displaying a variably sized halo around a graphical representation of the electrode assembly, a size and shape of the halo indicating the level and location of contact between the first electrode and the second electrode and viable tissue, the halo defining an enclosed boundary about at least a portion of the electrode assembly and being displayed on a plane parallel to longitudinal axis of the electrode assembly.