To provide a treatment device capable of using microwaves as treatment energy, recognizing the geometric enlargement of a treatment area in the axial direction of an energy supplying tool and controlling the output of the microwaves.
The microwaves for treatment of a microwave oscillation part 2 are impressed to a microwave piercing applicator 5 and radiated from a microwave antenna part 6 on the tip side to the side of a viable tissue 7 to which it is pierced. At this time, along the axial direction of the microwave piercing applicator 5, by first electrodes 8A and 8B and second electrodes 9A and 9B respectively arranged in a pair inside a cauterization range to be cauterized near the microwave antenna part 6 and on the outer side, the impedance of the viable tissue is measured by high frequency signals from an HF oscillation part 14. With the impedance between the second electrodes 9A and 9B as a reference, the geometric enlargement of the treatment area to the axial direction of the microwave piercing applicator 5 is recognized from an impedance measured value between the other electrodes and the output of the microwaves is controlled.
INABA MAKOTO
MIZUKAWA SATOSHI
HARUYAMA NORIHIKO
