Small-diameter endoscope surgical instrument

Abstract

This small-diameter endoscope surgical instrument comprises: an inner pipethat has an outer diameter equal to that of a small-diameter endoscopeto be used, that is used for inserting the small-diameter endoscope surgical instrument into a body, and that is replaced with the small-diameter endoscopeafter insertion thereof; a guide pipewhich is configured to have the small-diameter endoscope or the inner pipe inserted therethrough and which supports the small-diameter endoscope or the inner pipe so as to be movable in an axial direction; and a treatment pipewhich is configured to have the guide pipe inserted therethrough to support the guide pipe so as to be movable in the axial direction, and which has, at the leading end thereof, a treatment means such as an electrode, a blade, or a hook, wherein each of the small-diameter endoscope, inner pipe, guide pipe, and treatment pipe has an independent operation part at the proximate end thereof, and thus the rotation angle and the position in the axial direction thereof can be changed. The present invention enables, with a simple configuration, gripping or fixing of tissues, electrocautery, electrocoagulation, ablation, mobilization, separation, or traction of tissues, and further enables removal of blood clots, etc., stuck to a hook during surgery, and a sample extraction for biopsy.