Diathermic internal therapy device

The treatment device comprises: a flexible sheath; a control line axially movable within the flexible sheath; a first treatment member connected to a distal end of the control line; a second treatment member connected to a distal end of the first treatment member; and a protective member covering the second treatment member according to an operation mode. The second treatment member protrudes from the distal end of the protective member when the treatment device is in the first treatment mode. When the treatment device is in the second treatment mode, the first treatment member protrudes from the distal end of the flexible sheath and the protective member covers the second treatment member. 治疗装置包括：柔性护套；控制线，其可以在柔性护套内轴向地移动；第一治疗构件，其连接到控制线的远侧端；第二治疗构件，其连接到第一治疗构件的远侧端；以及保护构件，其根据操作模式覆盖第二治疗构件。当治疗装置处于第一治疗模式时，第二治疗构件从保护构件的远侧端突出。当治疗装置处于第二治疗模式时，第一治疗构件从柔性护套的远侧端突出，并且保护构件覆盖第二治疗构件。