Abstract: A submucosal layer dissection instrument of the present invention includes an instrument body that is inserted into a submucosal layer, a line formed between the proximal end side and the distal end side of the instrument body; and an expanding section provided on the distal end side of the instrument body that expands in the case of having received a supply of fluid through the line.

Abstract: This mucosa separation apparatus includes a first insertion portion inserted to the interior of a subject, an expansion portion disposed on a head portion of the first insertion portion, and which expands by infusion of a fluid, a passage formed within the first insertion portion and connected to the expansion portion, for supplying the fluid to the expansion portion, and a curving portion which makes a head portion of an instrument inserted to the interior of the subject curve with respect to a part of the instrument which is closer to a base portion of the instrument than the head portion thereof.

Abstract: An ultrasonic treatment apparatus includes a sheath which has an opening at a distal-end thereof; an ultrasonic transducer which is connected to the sheath, the ultrasonic transducer being able to generate ultrasonic vibration which is of treatment energy; an ultrasonic power supply unit which supplies electric power for driving the ultrasonic transducer; a treatment unit which is connected to the ultrasonic transducer, the treatment unit transmitting the ultrasonic vibration to a living tissue; and a high-frequency power supply unit which supplies high-frequency current which is of the treatment energy to the treatment unit.

Abstract: This mucosa separation apparatus includes a first insertion portion inserted to the interior of a subject, an expansion portion disposed on a head portion of the first insertion portion, and which expands by infusion of a fluid, a passage formed within the first insertion portion and connected to the expansion portion, for supplying the fluid to the expansion portion, and a curving portion which makes a head portion of an instrument inserted to the interior of the subject curve with respect to a part of the instrument which is closer to a base portion of the instrument than the head portion thereof.

Abstract: An ultrasonic treatment apparatus includes a sheath which has an opening at a distal-end thereof; an ultrasonic transducer which is connected to the sheath, the ultrasonic transducer being able to generate ultrasonic vibration which is of treatment energy; an ultrasonic power supply unit which supplies electric power for driving the ultrasonic transducer; a treatment unit which is connected to the ultrasonic transducer, the treatment unit transmitting the ultrasonic vibration to a living tissue; and a high-frequency power supply unit which supplies high-frequency current which is of the treatment energy to the treatment unit.

Abstract: A submucosal layer dissection instrument of the present invention includes an instrument body that is inserted into a submucosal layer, a line formed between the proximal end side and the distal end side of the instrument body; and an expanding section provided on the distal end side of the instrument body that expands in the case of having received a supply of fluid through the line.

Abstract: A treatment instrument for an endoscope includes a main body, a cutting wire and an insertion portion. The cutting wire has an insertion portion inserted in the main body and an exposed portion situated at a distal side of the insertion portion and exposed out of the main body. The cutting wire is supplied with high-frequency current, and the insulating member electrically insulates a peripheral surface of the cutting wire. The insulating member insulates that part of the exposed portion, which is other than a non-insulated portion extending in a range of 5 mm to 15 mm from a distal end of the exposed portion. The excision portion is formed of the non-insulated portion of the cutting wire.

Abstract: The knife has the flexible, electrically insulating casing (24) inserted into a body cavity via an endoscope. A wire within this casing receives the HF current from a HF source and can be displaced to project relative to a suction opening (38) at the distal end of the casing to define the cutting zone (42).The operating device at the proximal end of the casing has a suction mouthpiece coupling to the suction opening (38). The casing is strengthened via an inserted support ring (56) between the suction opening (38) and the cutting zone (42) and/or via an internal strengthening wire (50).ADVANTAGE--Prevents blockage of suction path during bending. (20 pp Dwg.No.

Abstract: An endoscopic treatment tool according to the present invention is led into the body through the endoscope channel. A treatment section (2) is operated by transmitting the operating power of an operating section (4) on the operator's side to the treatment section (2) at the forward end thereof. The endoscopic treatment tool is characterized in that a tubular sheath (28) is adapted to be inserted into the endoscope channel, rotative operation means (55) is arranged in the operating section (4) for rotatively operating the treatment section (2), and an operating wire (33) is rotatably inserted into the sheath (28) and has a torque transmissivity for coupling the treatment section (2) and the rotative operation means (55) and capable of transmitting the rotation torque from the rotative operation means (55) to the treatment section (2).