US 12,011,271 B2
Electrode catheter
Hirokazu Soma, Tokorozawa (JP); Nobuhiro Suzuki, Tokorozawa (JP); and Kohei Nakamura, Tokorozawa (JP)
Assigned to NIHON KOHDEN CORPORATION, Tokyo (JP)
Appl. No. 16/761,120
Filed by NIHON KOHDEN CORPORATION, Tokyo (JP)
PCT Filed Nov. 1, 2018, PCT No. PCT/JP2018/040639
§ 371(c)(1), (2) Date May 1, 2020,
PCT Pub. No. WO2019/093213, PCT Pub. Date May 16, 2019.
Claims priority of application No. 2017-215638 (JP), filed on Nov. 8, 2017.
Prior Publication US 2020/0275855 A1, Sep. 3, 2020
Int. Cl. A61B 5/28 (2021.01); A61B 5/00 (2006.01); A61B 5/283 (2021.01); A61B 5/287 (2021.01)
CPC A61B 5/287 (2021.01) [A61B 5/283 (2021.01); A61B 5/6856 (2013.01); A61B 2562/0209 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An electrode catheter for measuring an electric potential inside a heart of a subject, the electrode catheter comprising:
a shaft that is inserted into the heart, wherein the shaft comprises a distal end portion, and a guide portion that is connected to the distal end portion;
a non-contact electrode that is provided on an outer circumferential surface of the guide portion; and
at least one contact electrode that is provided on the outer circumferential surface of the distal end portion and that is configured to make contact with an endocardium of the heart,
wherein the non-contact electrode is provided on the outer circumferential surface of the guide portion so as not to make contact with the endocardium in a state where the contact electrode is in contact with the endocardium,
wherein the distal end portion has a predetermined shape different from a shape of the guide portion, and
a first impedance value related to the non-contact electrode and a second impedance value related to the contact electrode are provided to a computer configured to compare the first impedance value and the second impedance value, or to a display device configured to display the first impedance value and the second impedance value.