| 主权项 |
1. An incision instrument comprising:
an insertion section which is insertable into a body; and a manipulation section provided at a proximal end of the insertion section; wherein the insertion section comprises:
a first insulating member which has an elongated tubular shape, andan incision section inserted within the first insulating member; wherein the incision section comprises:
a first conductive member which has a tubular shape and has conductivity;a second conductive member disposed so as to movable inside the first conductive member along a longitudinal axis of the first conductive member, an outer diameter of the second conductive member being smaller than an inner diameter of the first conductive member;a contact section provided on an outer circumference surface of the second conductive member, formed to be larger than the outer diameter of the second conductive member, and consisting of a conductor which is capable of contacting with an inner surface of the first conducive member; anda second insulating member which includes: a proximal end portion which has an outer circumference surface and an inner circumference surface, the outer circumference surface elongated inside of a distal end of the first conductive member and fixed to the distal end of the first conductive member, the inner circumference surface forming a space where the contact section is movable in an inside of the outer circumference surface; and a distal end portion in which an opening section is opened to communicate with the space and through which the second conductive member is capable of protruding and retracting via the opening section, the distal end portion being formed at a distal end surface of the distal end portion, and wherein the manipulation section comprises:
a manipulation main body section fixed to a proximal end of the first insulating member, anda handle member attached to the manipulation main body section to be movable with respect to the manipulation main body section and to advance and retract the second conductive member with respect to the first conductive member; and wherein the second insulating member is positioned between the contact section and the first conductive member in a state in which the second conductive member is protruded from the opening section of the second insulating member. |
