US 12,376,902 B2
Balloon-type electrode catheter and method of actuating balloon-type electrode catheter
Kenji Mori, Tokyo (JP); and Yohei Suzuki, Tokyo (JP)
Assigned to JAPAN LIFELINE CO., LTD., Tokyo (JP)
Filed by Japan Lifeline Co., Ltd., Tokyo (JP)
Filed on Jan. 26, 2023, as Appl. No. 18/160,037.
Claims priority of application No. 2022029640 (JP), filed on Feb. 28, 2022.
Prior Publication US 2023/0270491 A1, Aug. 31, 2023
Int. Cl. A61B 18/14 (2006.01); A61B 18/00 (2006.01); A61M 25/10 (2013.01)
CPC A61B 18/1492 (2013.01) [A61B 2018/00232 (2013.01); A61M 2025/1004 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A balloon-type electrode catheter comprising:
a catheter shaft including an outer shaft having a tubular shape and an inner shaft housed in the outer shaft in a state in which the inner shaft is displaceable relative to the outer shaft in an axial direction of the outer shaft, the catheter shaft being insertable into a body;
a balloon provided at a part including a distal end of the catheter shaft, the balloon being inflatable with a fluid supplied from a part including a proximal end of the catheter shaft; and
an electrode disposed on a surface of the balloon, wherein
the balloon includes an outer joining portion joined to the outer shaft and an inner joining portion joined to the inner shaft at a position displaced from the outer joining portion in the axial direction,
the balloon in an inflated state includes a distal end large diameter portion, a proximal end large diameter portion positioned closer to the proximal end of the catheter shaft than the distal end large diameter portion is, a small diameter portion positioned between the distal end large diameter portion and the proximal end large diameter portion and being smaller in diameter than the two large diameter portions, a distal end inclined portion connecting the distal end large diameter portion and the small diameter portion, and a proximal end inclined portion connecting the proximal end large diameter portion and the small diameter portion,
the electrode is exposed at at least the small diameter portion, and
after the balloon is inflated by inflow of the fluid, the outer shaft and the inner shaft are displaced relative to each other, and thus the balloon deforms such that the distal end inclined portion and the proximal end inclined portion approach each other.