Radio frequency ablation catheter and system

A radiofrequency ablation system, comprising:

• a radiofrequency ablation catheter;
• a control system configured for controlling the operation of the radiofrequency ablation catheter;
• and
• a connector configured for connecting the radiofrequency ablation catheter with the control system,
• wherein the radiofrequency ablation catheter comprises:
• a catheter body;
• a localization sensor, fixedly arranged inside the catheter body;
• and
• ablation electrodes, fixedly arranged on an outer surface of the catheter body and used for generating radiofrequency currents, and
• wherein the localization sensor generates a current signal in response to a localization magnetic field of a space where the localization sensor is located, and outputs the current signal to the control system, so as to enable the control system to determine a position of the radiofrequency ablation catheter.

An ablation catheter, comprising:

• a catheter body;
• a trocar connected and fixed at a front end of the catheter body;
• an electrode catheter, arranged inside the catheter body and telescopically movable;
• and
• a center electrode, connected and fixed at the head portion of the electrode catheter, wherein the head portion of the center electrode is fixedly provided with an umbrella electrode;
• wherein:
• the center electrode is of a hollow structure;
• a localization sensor is arranged inside the center electrode;
• and
• the localization sensor generates a current signal in response to a localization magnetic field of a space where the localization sensor is located, and outputs the current signal to a control system outside the ablation catheter, so as to enable the control system to determine a position of the ablation catheter.