US 12,082,877 B2
Ablation catheter and operation method of same
Dorin Panescu, San Jose, CA (US); Cary Hata, Irvine, CA (US); Alan de la Rama, Cerritos, CA (US); Henning Ebert, Berlin (DE); and Steffen Holzinger, Berlin (DE)
Assigned to CRC EP, INC., Lake Oswego, OR (US)
Filed by CRC EP, Inc., Lake Oswego, OR (US)
Filed on Dec. 28, 2021, as Appl. No. 17/563,527.
Claims priority of provisional application 63/140,390, filed on Jan. 22, 2021.
Claims priority of application No. 21172336 (EP), filed on May 5, 2021.
Prior Publication US 2022/0233234 A1, Jul. 28, 2022
Int. Cl. A61B 18/12 (2006.01); A61B 18/14 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/1492 (2013.01) [A61B 18/1206 (2013.01); A61B 2018/00166 (2013.01); A61B 2018/00363 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/00839 (2013.01); A61B 2018/1226 (2013.01); A61B 2018/1253 (2013.01); A61B 2018/126 (2013.01); A61B 2018/1435 (2013.01); A61B 2018/1467 (2013.01); A61B 2218/002 (2013.01)] 50 Claims
OG exemplary drawing
 
1. An ablation catheter for treatment of patient tissue by delivery of high-voltage pulses comprising:
a catheter shaft having an ablation portion at a distal end of the catheter shaft;
a plurality of electrodes positioned along the ablation portion, wherein the ablation portion comprises at least two loop sections forming a three-dimensional spiral;
a first loop section adjacent to a second loop section on the three-dimensional spiral,
wherein the pitch between the first loop section and the second loop section in an uncompressed position where the ablation portion is not restricted by any external force is not greater than 5 mm and the pitch between the second loop section and a furthest distal end of the ablation portion in the uncompressed position is not greater than 5 mm, and
wherein the clearance between the first loop section and the second loop section in a compressed position where the ablation portion is flattened by an external force is at least 2 mm and the clearance between the second loop section and a furthest distal end of the ablation portion in the compressed position is at least 2 mm;
a first electrode positioned on the first loop section; and
a second electrode positioned on the second loop section and closest to the first electrode in either the uncompressed position or the compressed position;
wherein a distance between the first electrode and the second electrode is greater than 2 mm and less than 5 mm in the compressed position and less than 8 mm in the uncompressed position.