Abstract: An endoscopically inserting surgical tool is composed of an elongated flexible cord to be passed through a tool guide channel on an endoscope, and a tool action mechanism mounted on a fore distal end of the flexible cord to be projected out of the tool guide channel. The flexible cord has such a length that, when the tool action mechanism is projected out of a tool exit opening at the end of the tool guide channel, a proximal end portion of the flexible cord still remains outside and rearward of a tool entrance way which is provided on a manipulating head grip of the endoscope as an approach to the tool guide channel. A proximal end portion of the flexible cord is gripped in a rotary tool adjustor which is manipulable to turn the tool action mechanism clockwise or counterclockwise together with the flexible cord in the tool guide channel of the endoscope.

Abstract: A high-frequency treatment tool comprising: a flexible sheath to be inserted into a treatment tool insertion channel of an endoscope; a treatment tool body provided inside the flexible sheath and comprising: a flexible cord; and a high-frequency knife to which a high-frequency current is applied, formed to the front end of the flexible cord; and a hard cylinder having an electrical insulating property, inserted and fixed inside the flexible sheath, wherein the high-frequency knife comprises blade portions radially provided in its axial direction, each of the blade portions including an engaging part, and wherein, when the high-frequency knife is made to stick out from the hard cylinder, engaging parts of the blade portions abut against a rear end portion of the hard cylinder so that: the high-frequency knife is engaged with the hard cylinder; and communicating channels that communicate an inside and an outside of the flexible sheath are formed between the blade portions adjacent to each other.

Abstract: An endoscopic high-frequency treatment instrument includes a sheath, an operation wire, a first gripping part, a second gripping part and a first electrode. The sheath includes a front end, a rear end, and a longitudinal shaft. The operation wire is provided in the sheath so as to advance and retreat. The first gripping part is fixed to extend from the front end of the sheath along the longitudinal shaft. The second gripping part is connected to the operation wire and is moved about a base end thereof as a rotation center so as to approach and be separated from the first gripping part as the operation wire advances and retreats with respect to the sheath. The first electrode is provided on a surface of the first gripping part which faces the second gripping part.

Abstract: A high frequency treatment instrument is disclosed which comprises a flexible sheath having an axial passage hole, an operating means connected to a proximal end portion of said flexible sheath, a treatment instrument main body consisting of a flexible cord and an electrode provided at a distal end of the flexible cord to be inserted into the axial passage hole of the flexible sheath, the electrode being displaced between a retracted position in the flexible sheath and a protruded position out of a distal end by push or pull operation of the flexible cord by the operating means, the flexible cord consisting of a conductive body covered by an electrical insulating body and the electrode being electrically connected to the conductive body, and a lateral opening formed at a lateral surface of the flexible sheath, whereby a part of the electrode being exposed in the lateral opening at the retracted position, while the electrical insulating member of the flexible cord being faced with the lateral opening at the pr

Abstract: An endoscopic surgical instrument of the sort having a flexible cord encased in a flexible sheath and attached to a tail end of an electrode member to be retractably protruded from a fore distal end of the flexible sheath. A fluid passage is provided internally of and throughout the flexible sheath to extend as far as a fore distal end of the latter. An influx/efflux control valve is connected to a rear proximal end of the fluid passage. The influx/efflux control valve is provided with a plural number of influent/effluent fluid connection ports in association with a switching means which is adapted to selectively connect the influent/effluent fluid connection ports with the fluid passage in the flexible sheath.

Abstract: An endoscopically inserting surgical tool is composed of an elongated flexible cord to be passed through a tool guide channel on an endoscope, and a tool action mechanism mounted on a fore distal end of the flexible cord to be projected out of the tool guide channel. The flexible cord has such a length that, when the tool action mechanism is projected out of a tool exit opening at the end of the tool guide channel, a proximal end portion of the flexible cord still remains outside and rearward of a tool entrance way which is provided on a manipulating head grip of the endoscope as an approach to the tool guide channel. A proximal end portion of the flexible cord is gripped in a rotary tool adjustor which is manipulable to turn the tool action mechanism clockwise or counterclockwise together with the flexible cord in the tool guide channel of the endoscope.

Abstract: A high frequency surgical instrument having a forceps assembly at a fore distal end of an elongated insertion member, the forceps assembly being constituted by a pair of opening and closing grasper members which are shaped with a series of saw teeth on an inner meeting side in such a way that saw tooth portions on the two grasper members are at least partly brought into abutting engagement with each other when the grasper member are closed. For manipulating opening and closing actions of the grasper members, a manipulative transmission means is threaded through the insertion member, connecting the paired grasper members of the forceps to a manipulation handle which is attached to a proximal end of the insertion member. Each one of the grasper members is formed of a conducting material and arranged to have a width narrower than outside diameter of the insertion member on the saw-toothed inner side.

Abstract: An endoscopic treatment tool configured to be inserted in an endoscopic-treatment-tool inserting channel, comprises: a flexible cord; an operation portion provided at a tip end of the flexible cord; an operating wire, inserted in the flexible cord, that operates the operation portion; and an operating section, provided at a base end portion of the flexible cord, that operates the operating wire, wherein the flexible cord comprises a double-tube-like member including an insertion path component and a torque transmitting sleeve, the insertion path component includes a closely wound coil, and the torque transmitting sleeve includes a resin tube in which a mesh tube is embedded; and the insertion path component is provided in the torque transmitting sleeve by being inserted into the torque transmitting sleeve so as to be able to perform a relative sliding motion with respect with the torque transmitting sleeve, and the operating wire is inserted in the insertion path component.

Abstract: An endoscopic treatment tool comprises: a first member having a first finger retaining part; and a second member having at least one second finger retaining part in a ring form, wherein one of the first and second members is a support member, and the other one of the first and second members is a slider that is slidably arranged on the support member, and wherein a third finger retaining part having a recess is provided in a front end of at least one of said at least one second finger retaining part of the second member.

Abstract: A high-frequency treatment tool comprising: a flexible sheath to be inserted into a treatment tool insertion channel of an endoscope; a treatment tool body provided inside the flexible sheath and comprising: a flexible cord; and a high-frequency knife to which a high-frequency current is applied, formed to the front end of the flexible cord; and a hard cylinder having an electrical insulating property, inserted and fixed inside the flexible sheath, wherein the high-frequency knife comprises blade portions radially provided in its axial direction, each of the blade portions including an engaging part, and wherein, when the high-frequency knife is made to stick out from the hard cylinder, engaging parts of the blade portions abut against a rear end portion of the hard cylinder so that: the high-frequency knife is engaged with the hard cylinder; and communicating channels that communicate an inside and an outside of the flexible sheath are formed between the blade portions adjacent to each other.