CAUTERY NEEDLE DEVICE AND HIGH-FREQUENCY CAUTERY TREATMENT SYSTEM FOR TUMOR

摘要

The purpose of the present invention is to provide a cautery needle device in which the flexibility of an injection needle is not deteriorated even if an electrode constituted by a distal end section of the injection needle is made long, and cooling can be performed during cauterization such that variation in the cooling along the longitudinal direction of the electrode is small. This cautery needle device is provided with: a hollow needle (10) composed of a proximal end section (12) that is insulation-coated and a distal end section (11) that constitutes an electrode; a hub (20) having an injection port and a discharge port for a liquid; a connector (30) for conducting electricity; a thermocouple (40); and cooling-liquid introduction pipes (51, 52) which extend into the hollow needle (10) such that the respective proximal ends thereof are positioned inside the distal end section (11) of the hollow needle (10), and which discharge from respective distal end openings, a liquid injected from the injection port, wherein a slit is formed in the distal end section and a front region of the proximal end section (12) of the hollow needle (10) and imparts flexibility, liquid-tightness is achieved inside the hollow needle (10), and the positions of the distal end openings of the cooling-liquid introduction pipes (51, 52) differ from each other in the front/rear direction of the hollow needle (10).