Ablation therapeutic device, resectoscope and method of ablating living body tissue

A method for performing transurethral prostate resectioning using a device which is used in combination with a scope configured to observe a body cavity, the device comprising:

• a hollow insertion section which is configured to be inserted in the body cavity;
• a treatment portion which is configured to be inserted into the hollow insertion section;
• and
• an operation section which is configured to reciprocally move the treatment portion along a central axis of the hollow insertion section;
• wherein the treatment portion comprises:
• an active electrode section with a first loop-shaped portion at a distal end thereof, both ends of the first loop-shaped portion being respectively connected to the distal end portion thereof, and
• a detachment portion including a compression section with a second loop-shaped portion at a distal end thereof, both ends of the second loop-shaped portion being respectively connected to the distal end portion thereof;
• the method comprising the steps of:
• inserting the hollow insertion section into the body cavity leading to the prostate;
• inserting through the hollow insertion section the active electrode section operable with a high frequency current, and the compression section that is configured to contact the prostate and to detach the prostate;
• incising a part of the prostate with the active electrode section being pressed on the part of the prostate by applying the high-frequency current to the part of the prostate;
• ceasing the application of the high-frequency current to the part of the prostate after incising the part of the prostate;
• contacting the compression section with the incised portion of the prostate;
• pressing the compression section to the incised portion of the prostate, with the compression section being extended to a position in front of the active electrode section;
• and
• pushing out the compression section and detaching a detached portion including the incised portion of the prostate.