Japan Lifeline Co., Ltd.

Yasuo Sakano

Kenji Mori

Takashi Kawabata

Yasuhiro Kojima

Yutaka Onodera

Tadatsugu Onuma

An intracardiac defibrillation catheter system equipped with a defibrillation catheter, a power source device and an electrocardiograph. The defibrillation catheter is equipped with a first DC electrode group and a second DC electrode group. The power source device is equipped with a DC power source unit, a catheter-connected connector, an electrocardiograph-connected connector, an arithmetic processing unit, which controls the DC power source unit and has an output circuit for outputting a direct current voltage from the DC power source unit, and a changeover unit, in which the catheter-connected connector is connected to a common contact. The electrocardiograph-connected connector is connected to a first contact, and the arithmetic processing unit is connected to a second contact. In the intracardiac defibrillation catheter system, electric energy necessary and sufficient for defibrillation can be surely supplied. The defibrillation catheter can be used as an electrode catheter for cardiac potential measurement when a defibrillation treatment is not performed.

Intracardiac defibrillation catheter system

A radiofrequency electric current ablation catheter comprising a tip electrode, a means for detecting temperature of the tip electrode, a catheter shaft and a portion for operation at proximal end, wherein the tip electrode has a shape formed by connecting three or more spherical or approximately spherical surfaces having centers on the same straight line to each other with a curved surface. The catheter has the tip electrode which has a small diameter, is brought into excellent contact with organisms, can provide a great output power and is easily cooled with the circulating blood stream.

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Tokyo, Japan

Yasuo Sakano