ENDOSCOPIC SURGICAL TOOL

• Main Authors: SHIODA HIROAKI, KATO HIROMASA
• Format: Patent
• Language: English; Japanese
• Published: 07.09.2022
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; SURGERY

To provide an endoscopic surgical tool for making it possible to easily perform treatment while avoiding unintended occurrence of perforation on a treatment target such as the gastrointestinal tract.SOLUTION: An endoscopic surgical tool includes: a housing having a proximal end, a distal end, a central axis, and a first aperture forming an opening disposed at the distal end; an insulator disposed within the housing and having a central bore and a second aperture, the insulator configured to extend distally from the first aperture along the central axis; a knife disposed in the first aperture and including a tip, the knife having an extended position in which the knife is extended distally from the first aperture along the central axis and a retracted position in which the knife is retracted proximally towards the proximal end along the central axis; and a biasing element coupled to the knife and biasing the knife toward the retracted position when the knife is at the extended position.SELECTED DRAWING: Figure 3 【課題】本開示は、消化管などの処置対象に意図しない穿孔の発生を回避しながら、処置を簡易に行える内視鏡用術具を提供することを目的とする。【解決手段】本内視鏡用術具は、基端、先端、中心軸、および前記先端に開口を形成する第一アパーチャを有するハウジングと、前記ハウジング内に配置され、中心ボアおよび第二アパーチャを有し、前記中心軸に沿って前記第一アパーチャより先端側へ延伸するように構成される絶縁体と、前記第一アパーチャ内に配置され、チップを有するナイフであって、前記中心軸に沿って前記第一アパーチャより先端側へ延伸する延伸位置と、前記中心軸に沿って前記基端へ向かって後退される後退位置とを有するナイフと、前記ナイフに結合され、前記ナイフが前記延伸位置にある際、前記ナイフを前記後退位置へ付勢する付勢部材と、を有する。【選択図】図３