Patent ID: 6017339
Filing Date: 2000-01-25
Classification: A61B

Abstract:
An endoscopic diathermic knife for use with an endoscope having a treating instrument inserting channel, the knife comprising:an electrically insulating sheath body insertable into the treating instrument inserting channel of the endoscope and having a distal end portion, a proximal end portion, a central axis, and a plurality of lumens extending in a direction of the central axis, the plurality of lumens including at least a wire lumen and a first reinforcing lumen, the sheath body having a periphery through which a first wire opening and a second wire opening are formed in the distal end portion, the first wire opening being positioned on a side of the proximal end portion of the sheath body with respect to the second wire opening;an electrically conductive wire inserted into the wire lumen and led out of the sheath body through the first and second wire openings to form a diathermic knife portion; anda first reinforcing member inserted into the reinforcing lumen for reinforcing the sheath body, wherein the first reinforcing member has a proximal end positioned in the proximal end portion of the sheath body, and a distal end positioned in a vicinity of the first wire opening thereof, and wherein the distal end portion of the sheath body is unreinforced by the first reinforcing member.