A radio-frequency ablation catheter, comprising a handle portion, a needle tube portion connected to a distal end of the handle portion, a central electrode for ablation treatment, and a detection mechanism, wherein the detection mechanism comprises:
- a fixing base, a pulling string, a connecting base, and a plurality of detection electrodes arranged in a claw-shaped configuration, wherein
- the fixing base is provided with a plurality of mounting holes, and each of the detection electrodes extends through a respective mounting hole and is fixedly connected to the fixing base;
- a distal end of the pulling string is fixed to the fixing base;
- the connecting base is provided with a plurality of guide holes, each detection electrode extends through a respective guide hole, and the guide holes allow the detection electrodes to extend out of the connecting base in a dispersed manner;
- and
- each detection electrode comprises:
- a first section, a second section, and a third section, wherein an included angle between the second section and the first section is an obtuse angle, and an included angle between the third section and the second section is an obtuse angle,
- the needle tube portion comprises a first tube and a second tube,
- the handle portion comprises a cylinder sleeve and a sliding button, wherein
- the sliding button is slidably mounted on the cylinder sleeve, and
- a proximal end of the pulling string is fixed to the sliding button;
- and
- the central electrode comprises an electrode body, an electrode wire, and an electrode connector, wherein
- the electrode body, the second tube, the connecting base and the first tube are arranged in series in a direction from a distal end to a proximal end of the radio-frequency ablation catheter and fixedly connected one another, the electrode body is fixed to a distal end of the second tube and located at the distal end of the radio-frequency ablation catheter, the fixing base is slidably mounted in the first tube, and the plurality of detection electrodes are slidably located inside the first tube, a distal end of the electrode wire is electrically connected to the electrode body, the electrode wire extends through the cylinder sleeve, the first tube and the second tube, a proximal end of the electrode wire is electrically connected to the electrode connector, and the electrode connector is located outside the cylinder sleeve;
- and
- when the detection electrodes extend out of the connecting base in a dispersed manner, the detection electrodes are unfolded and surround the electrode body to obtain a temperature or impedance data of tissues around the electrode body of the central electrode so as to monitor progress of ablation of the central electrode, and distal ends of the detection electrodes are located on a same latitude.