JP2009072611A - Ligation apparatus - Google Patents

Ligation apparatus Download PDF

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Publication number
JP2009072611A
JP2009072611A JP2008296824A JP2008296824A JP2009072611A JP 2009072611 A JP2009072611 A JP 2009072611A JP 2008296824 A JP2008296824 A JP 2008296824A JP 2008296824 A JP2008296824 A JP 2008296824A JP 2009072611 A JP2009072611 A JP 2009072611A
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clip
pressing member
sheath
clip claw
claw member
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JP4870139B2 (en
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Junichi Ogiso
淳一 小木曽
Kiyotaka Matsuno
清孝 松野
Mamoru Nakada
守 中田
Kazushi Murakami
和士 村上
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Olympus Corp
Olympus Medical Systems Corp
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Olympus Corp
Olympus Medical Systems Corp
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/122Clamps or clips, e.g. for the umbilical cord
    • A61B17/1227Spring clips
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/128Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips
    • A61B17/1285Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips for minimally invasive surgery
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03Automatic limiting or abutting means, e.g. for safety
    • A61B2090/037Automatic limiting or abutting means, e.g. for safety with a frangible part, e.g. by reduced diameter

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Reproductive Health (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ligation apparatus which has a clip in which a clip claw member is advanced to be easily opened by a pressing member receiving elastic force in body cavity. <P>SOLUTION: The ligation apparatus makes a clip which ligatures living tissue so as to be retained in a body cavity. The ligation apparatus includes a clip 2 which has a clip claw member 11 openable/closable to ligate living tissue and a pressing member 13 to fit the clip claw member 11 thereinto, a sheath 4, an operation wire 5 freely advanced and retreated in the sheath 4, a connection member 10 set to the distal end side of the operation wire 5 and connectable with the clip claw member 11, an operation part 7 to operate the operation wire 5 to be advanced and retreated, and a plate spring 33 to energize the clip claw member 11 in a direction advancing to the press member 13. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、クリップによって体内の生体組織を結紮するようにした結紮装置に関する。   The present invention relates to a ligation apparatus configured to ligate a living body tissue with a clip.

従来、クリップによって体内の生体組織を結紮するようにした内視鏡用結紮装置の例として、特許文献1(特開2004−121485)や特許文献2(WO 03/030746 A1)に示される内視鏡用結紮装置が知られている。   Conventionally, as an example of an endoscopic ligation apparatus in which a living body tissue in a body is ligated by a clip, an endoscope shown in Patent Document 1 (Japanese Patent Laid-Open No. 2004-121485) and Patent Document 2 (WO 03/030746 A1). Mirror ligation devices are known.

特許文献1の内視鏡用結紮装置のクリップは、開脚するように付勢されたアームからなり、生体組織を結紮した状態のアームに押え管を嵌着してクリップを閉じた結紮状態に維持する。また、特許文献2の内視鏡用結紮装置のクリップは、クリップ脚基部をコイル状のシース内に引き込むことにより、クリップ脚部を閉じて生体組織を結紮し、この結紮状態にクリップ脚部を維持する。
特開2004−121485 WO 03/030746 A1
The clip of the endoscope ligation apparatus of Patent Document 1 is composed of an arm biased so as to open a leg, and a presser tube is fitted to an arm in a state in which a living tissue is ligated, and the clip is closed. maintain. Moreover, the clip of the ligation apparatus for endoscopes of Patent Document 2 draws the clip leg base portion into the coiled sheath, thereby closing the clip leg portion and ligating the living tissue. The clip leg portion is placed in this ligated state. maintain.
JP 2004-121485 A WO 03/030746 A1

本発明の目的は、体腔内でクリップのクリップ爪部材が押さえ部材に対して弾性力を受けて前進してクリップ爪部材が開き易い結紮装置を提供することにある。   An object of the present invention is to provide a ligating apparatus in which a clip claw member of a clip is easily opened in a body cavity by receiving an elastic force with respect to a pressing member and moving forward.

本発明は、体腔内の生体組織を結紮したクリップを体腔内に留置するようにした結紮装置において、生体組織を結紮する開閉自在なクリップ爪部材及びこのクリップ爪部材に被嵌する押さえ部材を有したクリップと、シースと、上記シース内にあって進退自在な操作部材と、上記操作部材の遠位側に設けられ、上記クリップ爪部材に接続可能な接続手段と、上記操作部材を進退操作する操作手段と、上記押さえ部材と上記クリップ爪部材との間に上記クリップ爪部材を付勢する弾性部と、上記操作部材を操作することにより生体組織を把捉した状態での上記クリップを上記シースから解放する解放手段と、を備えたことを特徴とする結紮装置である。
また、本発明は、体腔内の生体組織を結紮したクリップを体腔内に留置するようにした結紮装置において、生体組織を結紮する開閉自在なクリップ爪部材及びこのクリップ爪部材に被嵌する押さえ部材を有したクリップと、シースと、上記シース内にあって進退自在な操作部材と、上記操作部材の遠位側に設けられ、上記クリップ爪部材に接続可能な接続手段と、上記操作部材を進退操作する操作手段と、上記押さえ部材に対し前進する向きに上記クリップ爪部材を付勢する弾性部と、上記操作部材を操作することにより生体組織を把捉した状態での上記クリップを上記シースから解放する解放手段と、を備えたことを特徴とする結紮装置である。
The present invention relates to a ligation apparatus in which a clip ligating a biological tissue in a body cavity is placed in the body cavity, and includes an openable / closable clip claw member for ligating the biological tissue and a pressing member fitted to the clip claw member. A clip, a sheath, an operation member that can be moved forward and backward in the sheath, a connecting means that is provided on the distal side of the operation member and can be connected to the clip claw member, and advances and retracts the operation member An operating means, an elastic portion for biasing the clip claw member between the pressing member and the clip claw member, and the clip in a state where the living tissue is grasped by operating the operation member from the sheath And a release means for releasing the ligation apparatus.
The present invention also relates to an openable / closable clip claw member for ligating a biological tissue and a holding member fitted to the clip claw member in a ligation apparatus in which a clip ligating a biological tissue in a body cavity is placed in the body cavity. A clip having a clip, a sheath, an operation member that can be moved forward and backward in the sheath, a connecting means that is provided on the distal side of the operation member and can be connected to the clip claw member, and the operation member is advanced and retracted An operating means for operating, an elastic portion for urging the clip claw member in a forward direction with respect to the pressing member, and releasing the clip in a state of grasping a living tissue by operating the operating member A ligation apparatus comprising: a release means for performing the above-described operation.

本発明によれば、体腔内でクリップのクリップ爪部材が押さえ部材に対して弾性力を受けて前進してクリップ爪部材を開き易いものとした結紮装置を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the ligation apparatus which made the clip claw member of a clip advance in response to an elastic force with respect to a pressing member in a body cavity, and made it easy to open a clip claw member can be provided.

(第1実施形態)
図1〜図8に基づいて本発明の第1実施形態に係る内視鏡用結紮具について説明する。図1は本実施形態に係る内視鏡用結紮具全体の説明図であり、先端部分は断面して示してある。
(First embodiment)
The endoscope ligation tool according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory view of the entire endoscope ligation tool according to the present embodiment, and the distal end portion is shown in cross section.

本内視鏡用結紮具は、装置本体1とクリップ2を備え、クリップ2は装置本体1に対して着脱自在なものである。クリップ2は、装置本体1に装着された状態で後述するスライダー7によって開閉操作され、体腔内で生体組織を結紮するようになっている。   This endoscope ligation tool includes an apparatus main body 1 and a clip 2, and the clip 2 is detachable from the apparatus main body 1. The clip 2 is opened and closed by a slider 7 described later in a state where the clip 2 is mounted on the apparatus main body 1, and ligates a living tissue in a body cavity.

次に、装置本体1とクリップ2を具体的に説明する。まず、図1に示すように、装置本体1は可撓性のシース4を備える。シース4は、密に巻いたコイルによって形成されている。シース4は、図示しない、たとえば内視鏡のチャンネルを通じて体腔内に挿入されるものである。シース4内には操作ワイヤー5が進退可能に挿通されている。シース4の基端には操作部本体6を備えた操作部が接続されている。操作部の操作部本体6には前後方向へ摺動自在な操作用スライダー7が取り付けられていて、スライダー7は上記操作ワイヤー5の基端につながり、操作ワイヤー5を進退操作するようになっている(操作手段)。また、図1に示すように、操作部本体6の基端部分にはスライダー7を操作する手の指を掛ける指掛け部6aが形成されている。   Next, the apparatus main body 1 and the clip 2 will be specifically described. First, as shown in FIG. 1, the apparatus main body 1 includes a flexible sheath 4. The sheath 4 is formed by a densely wound coil. The sheath 4 is inserted into a body cavity through a channel of an endoscope (not shown), for example. An operation wire 5 is inserted into the sheath 4 so as to be able to advance and retreat. An operation unit including an operation unit main body 6 is connected to the proximal end of the sheath 4. An operation slider 7 slidable in the front-rear direction is attached to the operation unit main body 6 of the operation unit, and the slider 7 is connected to the base end of the operation wire 5 so that the operation wire 5 can be advanced and retracted. (Operating means). Further, as shown in FIG. 1, a finger hooking portion 6 a for hooking a finger of a hand operating the slider 7 is formed at the base end portion of the operation portion main body 6.

図1に示すように、上記シース4の先端にはパイプ状の環状部材からなるストッパー(部)8が溶接などにより固定的に取り付けられている。このストッパー8の外径は上記シース4の外径と同一であり、また、ストッパー8の内径は上記シース4の内径よりも小さい。そして、ストッパー8の内面部分は全周にわたりシース4の内面よりも内方へ突き出して小径部としてのフランジ9を形成している。   As shown in FIG. 1, a stopper (part) 8 made of a pipe-like annular member is fixedly attached to the distal end of the sheath 4 by welding or the like. The outer diameter of the stopper 8 is the same as the outer diameter of the sheath 4, and the inner diameter of the stopper 8 is smaller than the inner diameter of the sheath 4. And the inner surface part of the stopper 8 protrudes inward rather than the inner surface of the sheath 4 over the perimeter, and forms the flange 9 as a small diameter part.

上記ストッパー8はその先端によって第1のストッパー8aを形成し、第1のストッパー8aは後述するように拡開した羽根部21の後端に当接するようになっている。また、上記ストッパー8の内端は第2のストッパー8bを形成し、この第2のストッパー8bは後述するように上記押さえ部材13の大径部22の先端に当接するようになっている。   The stopper 8 forms a first stopper 8a by its tip, and the first stopper 8a comes into contact with the rear end of the expanded blade portion 21 as will be described later. The inner end of the stopper 8 forms a second stopper 8b, and the second stopper 8b comes into contact with the tip of the large diameter portion 22 of the pressing member 13 as will be described later.

上記操作ワイヤー5の先端には上記クリップ2を連結する接続手段としての接続部材10が接続されている。この接続部材10は操作ワイヤー5を前後へ移動する操作によりシース4内を前後に移動する。   A connecting member 10 as a connecting means for connecting the clip 2 is connected to the tip of the operation wire 5. The connecting member 10 moves back and forth in the sheath 4 by an operation of moving the operation wire 5 back and forth.

次に、上記クリップ2の構成について説明する。図1に示すように、クリップ2は、例えばステンレスの帯材の中央部を折り曲げることでV字状に形作られ、折曲げ中央部に形成された半円弧状の係止部から前方へ延びる2つのアーム状のクリップ爪(脚)部材11を形成している。この両方のクリップ爪部材11の先端は互いに向き合うように内側へ折り曲げられ、鈎状の爪12を形成している。また、クリップ2は上記接続部材10に外設されることによりその接続部材10を内包するパイプ状の押さえ部材13を備える。この押さえ部材13はパイプ状(円筒状)に形成されていて、接続部材10と一緒に進退自在であり、かつ、上記一対のクリップ爪部材11を引き込み可能なものとなっている。   Next, the configuration of the clip 2 will be described. As shown in FIG. 1, the clip 2 is formed, for example, in a V shape by folding a central portion of a stainless steel strip, and extends forward from a semicircular arc shaped locking portion formed in the bent central portion. One arm-shaped clip claw (leg) member 11 is formed. The tips of both clip claw members 11 are bent inward so as to face each other to form a bowl-shaped claw 12. Further, the clip 2 includes a pipe-shaped pressing member 13 that is externally provided on the connecting member 10 and encloses the connecting member 10. The pressing member 13 is formed in a pipe shape (cylindrical shape), can be moved forward and backward together with the connection member 10, and can retract the pair of clip claw members 11.

上記接続部材10の先端側部分は片側を切除した形の半円状部15を形成しており、この半円状部15の平面部16には、ティアドロップ型の突起17が垂直に突き出して設けられている。この突起17には上記クリップ2の基部に形成される輪状の係止部を係着するようになっている。   The distal end portion of the connection member 10 forms a semicircular portion 15 having a shape obtained by cutting out one side, and a teardrop-type protrusion 17 projects vertically on the flat portion 16 of the semicircular portion 15. Is provided. A ring-shaped locking portion formed at the base of the clip 2 is engaged with the protrusion 17.

また、図1に示すように、上記接続部材10における、半円状部15よりも基端側部分は全周にわたり外径が同一の円柱状部19となっている。この円柱状部19よりも手元側部分は上記円柱状部19よりも外径が小さい円柱状の比較的細長い小径部20となっている。この小径部20の基端には上述した操作ワイヤー5の先端が接着材や溶接などの接続手段により固定的に連結されている。上記押さえ部材13は、上記接続部材10に外設しており、その接続部材10を内包するとともに、接続部材10を包囲する。そして、この状態で、シース4内に収納され、シース4に装着される。押さえ部材13は、上記接続部材10と上記シース4に対しての進退自在なものであり、上記クリップ爪部材11を内部に引き込み可能なものである。   Moreover, as shown in FIG. 1, the base end side part rather than the semicircle-shaped part 15 in the said connection member 10 is the cylindrical part 19 with the same outer diameter over the perimeter. A portion closer to the hand than the columnar portion 19 is a columnar relatively elongated small diameter portion 20 having an outer diameter smaller than that of the columnar portion 19. The distal end of the operation wire 5 described above is fixedly connected to the proximal end of the small diameter portion 20 by connection means such as an adhesive or welding. The pressing member 13 is provided outside the connecting member 10 and encloses the connecting member 10 while enclosing the connecting member 10. In this state, it is housed in the sheath 4 and attached to the sheath 4. The pressing member 13 is movable forward and backward with respect to the connection member 10 and the sheath 4 and can retract the clip claw member 11 into the inside.

図2に示すように、上記押さえ部材13はその長手方向の中央部付近に、複数の羽根部21を設けている。羽根部21はその先端側部分のみが押さえ部材13につながっている。各羽根部21は、パイプ状の押さえ部材13との接続部分を支点とし、それ自身の弾性を利用して押さえ部材13内に畳んで収納が可能なものとなっている。   As shown in FIG. 2, the pressing member 13 is provided with a plurality of blade portions 21 in the vicinity of the central portion in the longitudinal direction. Only the tip end portion of the blade portion 21 is connected to the pressing member 13. Each blade portion 21 has a connection portion with the pipe-shaped pressing member 13 as a fulcrum, and can be folded and stored in the pressing member 13 using its own elasticity.

押さえ部材13の基端部外周は、シース4の内径よりも小さく、内周が上記シース4の先端にあるストッパー8の内径よりも大きい大径部22を形成する。大径部22を形成することにより、押さえ部材13の基端部分には接続部材10の円柱状部19の外径よりも小さい内径のフランジ状の係止部23を形成する。   The outer periphery of the proximal end portion of the pressing member 13 forms a large diameter portion 22 that is smaller than the inner diameter of the sheath 4 and whose inner periphery is larger than the inner diameter of the stopper 8 at the distal end of the sheath 4. By forming the large-diameter portion 22, a flange-like locking portion 23 having an inner diameter smaller than the outer diameter of the columnar portion 19 of the connecting member 10 is formed at the proximal end portion of the pressing member 13.

また、羽根部21を除いた押さえ部材13の外径はシース4の内径より小さく形成されており、このため、羽根部21を畳んだ状態で押さえ部材13全体をシース4内に収納可能である。逆に、羽根部21が開いた状態ではその羽根部21の後端がシース4及びストッパー8の内径よりも大きくなって、ストッパー8の第1のストッパー8aと当接して係止する状態になる。押さえ部材13を前進させると、その押さえ部材13の大径部22の先端がストッパー8の第2のストッパー8bに当たり、押さえ部材13は、それ以上、前進できなくなる。   Further, the outer diameter of the pressing member 13 excluding the blade portion 21 is formed smaller than the inner diameter of the sheath 4, so that the entire pressing member 13 can be accommodated in the sheath 4 with the blade portion 21 folded. . On the contrary, when the blade portion 21 is opened, the rear end of the blade portion 21 is larger than the inner diameters of the sheath 4 and the stopper 8, and comes into contact with and locks against the first stopper 8 a of the stopper 8. . When the pressing member 13 is advanced, the tip of the large-diameter portion 22 of the pressing member 13 hits the second stopper 8b of the stopper 8, and the pressing member 13 cannot advance any further.

そして、上記押さえ部材13が上記シース4の先端を構成するストッパー8から突き出したとき、上記羽根部21が拡開し、手元側へ引き込もうとしても拡開した羽根部21が上記ストッパー8の第1のストッパー8aと当接する。これによって、上記押さえ部材13が上記シース4内に引き込まれることを阻止する手段を構成している。また、上記押さえ部材13が上記ストッパー8の先端から突き出たとき、上記押さえ部材13に設けられた外径の大きい大径部22の先端が第2のストッパー8bに当接し、これによって、上記押さえ部材13の先端側への移動を防止する手段を構成している。   When the pressing member 13 protrudes from the stopper 8 constituting the distal end of the sheath 4, the blade portion 21 expands, and the blade portion 21 that has expanded even if it is pulled into the hand side is the second portion of the stopper 8. 1 stopper 8a. This constitutes a means for preventing the pressing member 13 from being pulled into the sheath 4. When the pressing member 13 protrudes from the tip of the stopper 8, the tip of the large-diameter portion 22 having a large outer diameter provided on the pressing member 13 comes into contact with the second stopper 8b. A means for preventing the movement of the member 13 toward the distal end side is configured.

さらに、図1及び図2に示すように、上記押さえ部材13の大径部22よりも先端側に位置する直近の近傍部位には強度を弱くした脆弱部25が形成されている。この脆弱部25は例えば、押さえ部材13の肉厚を薄くしたり、押さえ部材13にスリットを入れたりすることなどの方法で形成される。   Further, as shown in FIGS. 1 and 2, a weakened portion 25 having a weakened strength is formed in the immediate vicinity located on the tip side of the large-diameter portion 22 of the pressing member 13. This weak part 25 is formed by methods, such as making the thickness of the pressing member 13 thin, or putting a slit in the pressing member 13, for example.

図2に示すように、押さえ部材13の先端には、先端開口領域に突き出した複数のブリッジ部26が設けられている。ブリッジ部26がない非閉塞部分は、上記クリップ爪部材11が摺動可能な寸法に開口する。上記各ブリッジ部26は、例えば、図2に示すように、押さえ部材13の先端から押さえ部材13の内側へ向けて突き出して押さえ部材13と一体に形成されている。   As shown in FIG. 2, a plurality of bridge portions 26 protruding from the tip opening region are provided at the tip of the pressing member 13. The non-blocking portion without the bridge portion 26 opens to a size that allows the clip claw member 11 to slide. For example, as shown in FIG. 2, each of the bridge portions 26 protrudes from the front end of the pressing member 13 toward the inside of the pressing member 13 and is formed integrally with the pressing member 13.

なお、ブリッジ部26としては、図3に示すように、押さえ部材13の先端に前方に向けて突設した片27を、押さえ部材13の内側へ向けて折り曲げ変形することで作るようにしてもよい。   As shown in FIG. 3, the bridge portion 26 may be formed by bending and deforming a piece 27 projecting forward at the tip of the pressing member 13 toward the inside of the pressing member 13. Good.

次に、本実施形態の内視鏡用結紮具の使用方法について図4〜8を参照しながら説明する。
まず、図4に示すように、シース4の先端部内に完全に収納した状態でクリップ2を装着する。このように装着した状態で、クリップ2の羽根部21は、シース4の内周面に当たり押し込まれ、その弾性範囲で畳まれている。また、上記クリップ爪部材11も同じくシース4の内周面に当たり押し込まれ、その弾性範囲で閉じている。
Next, a method of using the endoscope ligation tool of the present embodiment will be described with reference to FIGS.
First, as shown in FIG. 4, the clip 2 is mounted in a state where it is completely stored in the distal end portion of the sheath 4. In a state where the clip 2 is mounted in this manner, the blade portion 21 of the clip 2 is pushed into the inner peripheral surface of the sheath 4 and is folded in its elastic range. The clip claw member 11 is also pushed into the inner peripheral surface of the sheath 4 and closed within its elastic range.

このようなクリップ2を収納した状態で、シース4を、図示しない、たとえば内視鏡のチャンネル挿入口(鉗子栓)からそのチャンネル内に挿入し、シース4の先端部分を体腔内に導く。内視鏡とは別の器具を用いて体腔内にシース4を導入するようにしてもよい。   In a state where the clip 2 is housed, the sheath 4 is inserted into the channel through a channel insertion port (forceps plug) of an endoscope (not shown), for example, and the distal end portion of the sheath 4 is guided into the body cavity. The sheath 4 may be introduced into the body cavity using an instrument different from the endoscope.

そして、体腔内でシース4の先端部が内視鏡から突き出したら操作部本体6に対してスライダー7を先端側へ押して前進させて操作ワイヤー5を押し込む。すると、図5に示すように、上記クリップ2の先端部分が、シース4のストッパー8から外へ突き出る。このとき、押さえ部材13の基端部分に位置する大径部22は、シース4の先端に設けたストッパー8の内径より大きいため、そのストッパー8のフランジ9の部分に突き当たり、それ以上、クリップ2の前進移動が阻止され、クリップ2の全体がシース4の先端開口から突き抜けることはない。   And if the front-end | tip part of the sheath 4 protrudes from an endoscope in a body cavity, the slider 7 will be pushed to the front end side with respect to the operation part main body 6, and will advance, and the operation wire 5 will be pushed in. Then, as shown in FIG. 5, the tip portion of the clip 2 protrudes outward from the stopper 8 of the sheath 4. At this time, the large-diameter portion 22 positioned at the proximal end portion of the pressing member 13 is larger than the inner diameter of the stopper 8 provided at the distal end of the sheath 4, so that it abuts against the flange 9 portion of the stopper 8 and the clip 2 further. Therefore, the entire clip 2 does not penetrate through the distal end opening of the sheath 4.

また、ストッパー8の長さに対して、大径部22の先端から羽根部21の後端までの長さは若干長く作られているので、押さえ部材13の大径部22がストッパー8の後端に位置する第2のストッパー8bに突き当たった図5に示す時点で、羽根部21の全体がシース4及びストッパー8から外へ出て解放される。そして、羽根部21はそれ自身の弾性による拡張力により、図5に示すように拡開する。また、羽根部21が拡開することで、羽根部21の後端がストッパー8の先端にある第1のストッパー8aに当たり得るようになり、押さえ部材13は手元側への移動が阻止される。このような移動阻止手段による機能によって、これ以後、押さえ部材13はシース4内に引き込むことができなくなる。   In addition, since the length from the tip of the large diameter portion 22 to the rear end of the blade portion 21 is made slightly longer than the length of the stopper 8, the large diameter portion 22 of the pressing member 13 is located behind the stopper 8. At the point of time shown in FIG. 5 where the second stopper 8b is located at the end, the entire blade portion 21 is released from the sheath 4 and the stopper 8 and released. And the blade | wing part 21 is expanded as shown in FIG. 5 with the expansion force by its own elasticity. Further, since the blade portion 21 is expanded, the rear end of the blade portion 21 can come into contact with the first stopper 8a at the tip of the stopper 8, and the pressing member 13 is prevented from moving toward the hand side. By this function of the movement preventing means, the pressing member 13 cannot be pulled into the sheath 4 thereafter.

さらに、押さえ部材13の大径部22がストッパー8の第2のストッパー8bに突き当るようになっているため、押さえ部材13の先端側への移動も阻止されるようになる。この移動阻止手段による機能によって、これ以後、クリップ2の押さえ部材13は、それ以上、シース4から突き出ることができなくなる。
このようにして、クリップ2の押さえ部材13の移動を阻止する固定手段はその機能を奏する。この押さえ部材13の固定状態で、クリップ爪部材11は、既に操作手段の接続部材10と共にブリッジ部26を越えて突き出るように前進させられており、また、クリップ爪部材11はその内側に位置するブリッジ部26により拡げられ、クリップ爪部材11は図5に示すように開いた状態となる。
Furthermore, since the large-diameter portion 22 of the pressing member 13 comes into contact with the second stopper 8b of the stopper 8, the movement of the pressing member 13 toward the distal end side is also prevented. By this function of the movement preventing means, the pressing member 13 of the clip 2 can no longer protrude from the sheath 4 thereafter.
Thus, the fixing means for preventing the movement of the pressing member 13 of the clip 2 has its function. With the pressing member 13 fixed, the clip claw member 11 has already been advanced so as to protrude beyond the bridge portion 26 together with the connection member 10 of the operation means, and the clip claw member 11 is positioned inside thereof. The clip claw member 11 is expanded by the bridge portion 26 and is in an open state as shown in FIG.

次に、このようにクリップ爪部材11を開いた状態のまま、内視鏡による観察下で、シース4を内視鏡に対して押し込み、クリップ爪部材11の先端を組織Aに押し付ける。   Next, the sheath 4 is pushed into the endoscope while observing with the endoscope while the clip claw member 11 is opened as described above, and the tip of the clip claw member 11 is pressed against the tissue A.

さらに、操作部本体6に対してスライダー7を引くことにより、操作ワイヤー5を介して接続部材10を手前に引き、クリップ爪部材11を押さえ部材13内に引き込む。すると、図6に示すように、押さえ部材13内にクリップ爪部材11を深く引き込むことになり、クリップ爪部材11は、押さえ部材13の内面により閉じ込められ、クリップ爪部材11により組織Aを把持し、結紮状態になる。   Further, by pulling the slider 7 with respect to the operation portion main body 6, the connection member 10 is pulled forward through the operation wire 5, and the clip claw member 11 is pulled into the pressing member 13. Then, as shown in FIG. 6, the clip claw member 11 is drawn deeply into the pressing member 13, and the clip claw member 11 is confined by the inner surface of the pressing member 13, and the tissue A is gripped by the clip claw member 11. , Become ligated.

この作業において、組織Aを適切な状態で結紮することが出来なかった場合、再度、操作部本体6に対してスライダー7を先端側へ移動することで、クリップ爪部材11を開き、図5で示す状態に戻す。そして、上述したと同様、スライダー7を引くことで、クリップ爪部材11を閉じ、組織Aを再度把持しようとする。この操作を図6で示す適切な把持状態になるまで繰り返す。   In this work, when the tissue A cannot be ligated in an appropriate state, the clip claw member 11 is opened again by moving the slider 7 toward the distal end side with respect to the operation portion main body 6, and in FIG. Return to the state shown. Then, as described above, by pulling the slider 7, the clip claw member 11 is closed and the tissue A is tried to be gripped again. This operation is repeated until an appropriate gripping state shown in FIG.

クリップ爪部材11が適切な状態で組織Aを把持したら、スライダー7を強く手元側へ引く。すると、図7に示すように、接続部材10における半円状部15の破断可能部分が破断する。この接続部材10の破断可能部分の破断を的確に行わせるために、上記半円状部15に径を細めた強度的に弱い部分を設けても良い。   When the clip nail member 11 holds the tissue A in an appropriate state, the slider 7 is pulled strongly toward the hand side. Then, as shown in FIG. 7, the breakable portion of the semicircular portion 15 in the connecting member 10 is broken. In order to accurately break the breakable portion of the connecting member 10, the semicircular portion 15 may be provided with a weakened portion with a reduced diameter.

また、破断した接続部材10に残った円柱状部19の基端部分は、図8に示すように押さえ部材13の係止部23に引っ掛かる。この係止した状態からスライダー7をさらに強く引くと、今度は、押さえ部材13の強度的に弱い脆弱部25の部分が破断し、クリップ2が装置本体1のシース4から離脱し、組織Aを把捉した状態の上記クリップ2を上記シース4から解放する。   Further, the base end portion of the columnar portion 19 remaining on the broken connection member 10 is hooked on the locking portion 23 of the pressing member 13 as shown in FIG. When the slider 7 is further pulled strongly from the locked state, the weakened portion 25 of the pressing member 13 is weakened in this time, and the clip 2 is detached from the sheath 4 of the apparatus main body 1 to remove the tissue A. The clip 2 in the grasped state is released from the sheath 4.

このように、クリップ2を解放する手段が作用した後、図8に示すように、シース4から離脱したクリップ2のクリップ爪部材11は押さえ部材13により絞り込まれ、押さえ部材13の内面との摩擦抵抗により閉じた状態に維持される。したがって、図8に示すように、クリップ2は組織Aを結紮した閉状態のまま、体腔内に留置される。   Thus, after the means for releasing the clip 2 acts, as shown in FIG. 8, the clip claw member 11 of the clip 2 detached from the sheath 4 is squeezed by the pressing member 13 and friction with the inner surface of the pressing member 13. It is kept closed by a resistor. Therefore, as shown in FIG. 8, the clip 2 is placed in the body cavity in a closed state in which the tissue A is ligated.

以上の如く、本実施形態では、シース4内にクリップ2を収納した状態で、たとえば内視鏡のチャンネルなどを通じて体腔内に挿入し、その後、クリップ2をシース4の先端から突き出すようにしたので、内視鏡などの誘導器具を損傷させる虞が無く、また、内視鏡などの誘導器具のチャンネルなどに引っ掛かることなく、軽く挿入することが可能になる。   As described above, in the present embodiment, the clip 2 is housed in the sheath 4 and inserted into the body cavity through, for example, an endoscope channel, and then the clip 2 protrudes from the distal end of the sheath 4. There is no risk of damaging a guide instrument such as an endoscope, and light insertion can be performed without being caught by a channel of a guide instrument such as an endoscope.

また、押さえ部材13の大径部22と羽根部21の係止手段により、クリップ2とシース4とが固定され、スライダー7の前後動操作により、クリップ2の開閉を繰り返し行い得るようになる。クリップ2の開閉を何回も確実に行うことが可能なので、組織Aを適切な結紮状態になるまで操作を繰り返すころができる。スライダー7を押す動作がクリップ2の突き出し動作とクリップ2の開動作となり、スライダー7の引き動作がクリップ2の閉じ動作とクリップの離脱になる操作部のスライダー7の動き方向と先端の動き方向が一致しており、このため、直感的な操作が可能である。   Further, the clip 2 and the sheath 4 are fixed by the locking means of the large-diameter portion 22 and the blade portion 21 of the pressing member 13, and the clip 2 can be repeatedly opened and closed by the forward / backward movement operation of the slider 7. Since the clip 2 can be reliably opened and closed many times, the operation can be repeated until the tissue A is in an appropriate ligated state. The operation of pushing the slider 7 is the protruding operation of the clip 2 and the opening operation of the clip 2, and the pulling operation of the slider 7 is the closing operation of the clip 2 and the detachment of the clip. Therefore, intuitive operation is possible.

また、クリップ2のクリップ爪部材11を強制的に開けるように押さえ管としての押さえ部材13の先端にブリッジ部26を設けるようにしたので、クリップ爪部材11の開閉操作も確実に行うことが可能になった。   Further, since the bridge portion 26 is provided at the tip of the holding member 13 as a holding tube so as to forcibly open the clip claw member 11 of the clip 2, the opening and closing operation of the clip claw member 11 can be performed reliably. Became.

(第2実施形態)
図9〜図13に基づいて本発明の第2実施形態に係る内視鏡用結紮具について説明する。本実施形態は上述した第1実施形態とは次の点で相違する。
(Second Embodiment)
An endoscope ligation tool according to a second embodiment of the present invention will be described with reference to FIGS. This embodiment is different from the above-described first embodiment in the following points.

すなわち、図9に示すように、操作ワイヤー5の遠位端にはワイヤー大径部28が設けられている。ワイヤー大径部28は、操作ワイヤー5よりも大きな径の管状部材またはワイヤー部材を取り付けて構成され、上記接続部材10よりも手元側に位置する。このワイヤー大径部28は、たとえば操作ワイヤー5と一体の物あるいは別部材のものを上記接続部材10に接着、機械的接続や溶接などにより連結してなる。   That is, as shown in FIG. 9, the wire large-diameter portion 28 is provided at the distal end of the operation wire 5. The wire large-diameter portion 28 is configured by attaching a tubular member or a wire member having a diameter larger than that of the operation wire 5, and is positioned closer to the hand than the connection member 10. The wire large-diameter portion 28 is formed by, for example, connecting an operation wire 5 or a separate member to the connection member 10 by bonding, mechanical connection, welding, or the like.

本実施形態のクリップ2は、2つのクリップ爪部材11を、たとえばステンレス製の帯状部材の中央部を少なくとも2回クロスさせて折り曲げた複数のクロス部29を備える。2つのクロス部29の間には少なくとも1つの山部30が形成されている。クリップ2は上記接続部材10を内包するパイプ状の押さえ部材13を備え、この押さえ部材13の長手方向手元側端にはその押さえ部材13の外周部分よりも大きな径で外へ広がり得る大径部22aが形成されている。大径部22aはその先端側部分のみが押さえ部材13につながっている。また、大径部22aの手元側端には内方へ突き出す少なくとも1つの突起部31が設けられている。そして、大径部22aは接続部分を支点とし、押さえ部材13の接続部分またはそれ自身の弾性を利用して拡開し得る。   The clip 2 of the present embodiment includes a plurality of cross portions 29 formed by bending the two clip claw members 11 by crossing the central portion of, for example, a stainless steel strip at least twice. At least one peak portion 30 is formed between the two cross portions 29. The clip 2 includes a pipe-shaped pressing member 13 that encloses the connecting member 10, and a large-diameter portion that can spread outward at a proximal end in the longitudinal direction of the pressing member 13 with a larger diameter than the outer peripheral portion of the pressing member 13. 22a is formed. Only the tip end portion of the large diameter portion 22 a is connected to the pressing member 13. Further, at least one protrusion 31 protruding inward is provided at the proximal end of the large diameter portion 22a. And the large diameter part 22a can be expanded using a connection part as a fulcrum, using the connection part of the pressing member 13, or the elasticity of itself.

また、図9に示すように、押さえ部材13の先端部分の内側には内方へ突き出たフランジ状の小径部32が形成されている。この小径部32は段差状に形成されているが、スロープ状など他の形状によって形成したものでもよい。上記クロス部29の山部30同士が押さえ部材13の径方向に離間する距離は、少なくとも押さえ部材13の小径部32の径よりも大きいが、その小径部32以外の部分の内径よりも大きくても小さくてもよい。   As shown in FIG. 9, a flange-shaped small-diameter portion 32 protruding inward is formed on the inner side of the distal end portion of the pressing member 13. The small diameter portion 32 is formed in a step shape, but may be formed in other shapes such as a slope shape. The distance at which the crest portions 30 of the cross portion 29 are separated from each other in the radial direction of the pressing member 13 is at least larger than the diameter of the small diameter portion 32 of the pressing member 13, but larger than the inner diameter of the portion other than the small diameter portion 32. May be small.

次に、本実施形態の内視鏡用結紮具の使用方法について図9〜図13を参照しながら説明する。上述した第1実施形態と同様な手順で使用されるが、以下のような相違がある。   Next, a method for using the endoscope ligation tool of the present embodiment will be described with reference to FIGS. The same procedure as in the first embodiment described above is used, but there are the following differences.

まず、図9に示すように、クリップ2をシース4の先端部内に完全に収納した状態にする。このクリップ収納状態では、押さえ部材13における突起部31の先端が操作ワイヤー5のワイヤー大径部28の外周面に当たり、突起部31はその弾性範囲内で押し広げられている。   First, as shown in FIG. 9, the clip 2 is completely accommodated in the distal end portion of the sheath 4. In this clip storage state, the tip of the protrusion 31 in the pressing member 13 hits the outer peripheral surface of the wire large-diameter portion 28 of the operation wire 5, and the protrusion 31 is expanded within its elastic range.

このようなクリップ収納状態で本装置1のシース4を内視鏡のチャンネルに挿入し、シース4の先端部の部分を体腔内へ導く。そして、内視鏡観察によりシース4の先端の部分が体腔内で突き出したことを確認したら操作部本体6に対してスライダー7を先端側へ押して前進し、操作ワイヤー5を押し込む。すると、図10に示すように、クリップ2のクリップ爪部材11の部分が、シース4のストッパー8から外へ突き出る。このとき、押さえ部材13の手元側にある大径部22aはシース4のストッパー8の内径よりも大きく広がっているため、図10に示すように、その大径部22aがストッパー8の第2のストッパー8bに突き当たり、クリップ2はそれ以上に前進できない。   With the clip stored in such a state, the sheath 4 of the present apparatus 1 is inserted into the channel of the endoscope, and the distal end portion of the sheath 4 is guided into the body cavity. Then, when it is confirmed by endoscopic observation that the distal end portion of the sheath 4 protrudes in the body cavity, the slider 7 is pushed toward the distal end side with respect to the operation portion main body 6, and the operation wire 5 is pushed in. Then, as shown in FIG. 10, the portion of the clip claw member 11 of the clip 2 protrudes outward from the stopper 8 of the sheath 4. At this time, since the large-diameter portion 22a on the proximal side of the pressing member 13 is wider than the inner diameter of the stopper 8 of the sheath 4, the large-diameter portion 22a is the second diameter of the stopper 8 as shown in FIG. The clip 2 hits the stopper 8b and cannot advance further.

押さえ部材13がシース4の先端部分に固定された状態で、操作部のスライダー7を押し込み、操作ワイヤー5を介して接続部材10を押し進めることにより、図10に示すようにクリップ爪部材11を押さえ部材13の先端から突き出す。すると、押さえ部材13の小径部32により、クロス部29の山部30が押し潰され、クリップ爪部材11および爪12は開いた状態になる。この爪12が開いた状態からシース4を内視鏡に対して押し込むことで、病変組織に爪12の先端を押し付ける。   In a state where the pressing member 13 is fixed to the distal end portion of the sheath 4, the clip member 11 is pressed as shown in FIG. 10 by pushing the slider 7 of the operation unit and pushing the connecting member 10 through the operation wire 5. It protrudes from the tip of the member 13. Then, the crest portion 30 of the cross portion 29 is crushed by the small diameter portion 32 of the pressing member 13, and the clip claw member 11 and the claw 12 are in an open state. By pushing the sheath 4 into the endoscope from the state where the nail 12 is open, the tip of the nail 12 is pressed against the diseased tissue.

次に、操作部のスライダー7を手前側に引き、操作ワイヤー5および接続部材10を介してクリップ爪部材11を押さえ部材13に引き込むと、図11に示すように、クリップ爪部材11は押さえ部材13の内面により閉じ、病変組織Aを把持する結紮状態になる。   Next, when the slider 7 of the operation portion is pulled to the near side and the clip claw member 11 is pulled into the pressing member 13 via the operation wire 5 and the connecting member 10, the clip claw member 11 is moved to the pressing member as shown in FIG. 13 is closed by the inner surface of 13 and it becomes a ligation state which grasps the lesioned tissue A.

この操作によって、組織Aを適切な状態で結紮できなかった場合は、再度、操作部本体6に対してスライダー7を先端側へ移動して、クリップ爪部材11を再度開き、図10に示す開状態に戻す。そして、再び上述したと同様に操作し、スライダー7を手前側に牽引することで、クリップ爪部材11を閉じ、組織Aを再度把持する一連の操作を行う。   When the tissue A cannot be ligated in an appropriate state by this operation, the slider 7 is again moved to the distal end side with respect to the operation portion main body 6, and the clip claw member 11 is opened again, and the opening shown in FIG. Return to the state. Then, the same operation as described above is performed again, and by pulling the slider 7 toward the front side, a series of operations for closing the clip claw member 11 and grasping the tissue A again is performed.

このような一連の操作を図11に示すような適切な把持状態になるまで繰り返す。適切な状態で組織Aを把持できたら今度はスライダー7をより強く手元側へ牽引する。すると、図12に示すように接続部材10における半円状部15が破断する。このとき、ワイヤー大径部28を備えた操作ワイヤー5の部分はシース4内に引き込まれ、また、ワイヤー大径部28で押し広げられていた押さえ部材13の大径部22aが自身の弾性により内側に縮む。そして、大径部22aは押さえ部材13と同じ径になり、クリップ2は図13に示すようにシース4より解き放されて離脱する。   Such a series of operations is repeated until an appropriate gripping state as shown in FIG. 11 is obtained. If the tissue A can be grasped in an appropriate state, the slider 7 is pulled more strongly toward the hand side. Then, as shown in FIG. 12, the semicircular portion 15 in the connecting member 10 is broken. At this time, the portion of the operation wire 5 provided with the wire large-diameter portion 28 is drawn into the sheath 4, and the large-diameter portion 22 a of the pressing member 13 that has been expanded by the wire large-diameter portion 28 is caused by its own elasticity. Shrink inward. The large diameter portion 22a has the same diameter as the pressing member 13, and the clip 2 is released from the sheath 4 and detached as shown in FIG.

そして、本実施形態のクリップ開閉機構は、クリップ2の開閉を繰り返しても、クリップ2の材質に関係なく、クリップ2の開き幅の劣化減少を抑えられる。このことからクリップ2の開閉を恒久的に繰り返すことができる。   The clip opening / closing mechanism of the present embodiment can suppress a decrease in the opening width of the clip 2 regardless of the material of the clip 2 even if the opening / closing of the clip 2 is repeated. From this, the opening and closing of the clip 2 can be repeated permanently.

なお、開き直し式クリップでは繰り返し開閉を繰り返すと、クリップが塑性変形して、クリップの開き幅が減少してしまうという課題があったが、本実施形態ではこの課題を解決できる。さらに開き直し式クリップは押さえ部材とシースとの固定が必須となっており、そのためにクリップの分離箇所に塑性変形を用いると、繰り返し開閉が確実に行えないという課題があったが、本実施形態ではこの課題も解決できる。   In the reopening type clip, when the opening and closing are repeated, there is a problem that the clip is plastically deformed and the opening width of the clip is reduced, but this embodiment can solve this problem. Furthermore, the re-opening type clip requires the fixing of the holding member and the sheath. For this reason, if plastic deformation is used at the separation part of the clip, there is a problem that it cannot be reliably opened and closed repeatedly. Then this problem can be solved.

以上の如く、本実施形態では、クリップ2をシース4から分離する解放手段の機構の変形している部分が弾性的に元に戻るため、確実に分離することができる。また、接続部材10の破断以外に大きな操作力を必要としないため、軽い力での操作が可能である。   As described above, in this embodiment, since the deformed portion of the mechanism of the release means that separates the clip 2 from the sheath 4 is elastically restored, it can be reliably separated. Further, since a large operating force other than the breaking of the connecting member 10 is not required, an operation with a light force is possible.

(第3実施形態)
図14及び図15に基づいて本発明の第3実施形態に係る内視鏡用結紮具について説明する。本実施形態は上述した第1実施形態のものとは次の点で相違する。
(Third embodiment)
An endoscope ligation tool according to a third embodiment of the present invention will be described based on FIGS. 14 and 15. This embodiment is different from that of the first embodiment described above in the following points.

すなわち、図14に示すように、押さえ部材13の長手方向中央付近の内側にその押さえ部材13の中心軸方向に向けて突き出る板バネ33を設けたものである。この板バネ33はたとえば押さえ部材13と一体の物、あるいは別部材のものを接着、機械的接続または溶接などで押さえ部材13に取り付けたものである。この板バネ33は、通常、接続部材10または操作ワイヤー5の部分に接触しており、接続部材10または操作ワイヤー5に対して先端方向へ向く弾性力をかけるような寸法・設定になっている。この板バネ33は上記クリップ爪部材11を上記押さえ部材13に対して前進させる手段を構成する。   That is, as shown in FIG. 14, a leaf spring 33 protruding toward the central axis direction of the pressing member 13 is provided inside the vicinity of the center in the longitudinal direction of the pressing member 13. The leaf spring 33 is, for example, a member integrated with the pressing member 13 or a separate member attached to the pressing member 13 by bonding, mechanical connection or welding. The leaf spring 33 is normally in contact with the connection member 10 or the operation wire 5 and is dimensioned and set to apply an elastic force toward the distal end to the connection member 10 or the operation wire 5. . The leaf spring 33 constitutes means for moving the clip claw member 11 forward relative to the pressing member 13.

次に、本実施形態の内視鏡用結紮具の使用方法について図14及び図15を参照しながら説明する。これは、上述した第1実施形態と略同様な手順で使用されるが、以下のような相違がある。   Next, a method for using the endoscope ligation tool of the present embodiment will be described with reference to FIGS. This is used in substantially the same procedure as in the first embodiment described above, with the following differences.

図14に示すように、スライダー7に操作力が加わっていないとき、接続部材10は押さえ部材13の先端側に位置しており、このため、クリップ爪部材11は開き、板バネ33の弾性力は解放されている。   As shown in FIG. 14, when no operating force is applied to the slider 7, the connecting member 10 is positioned on the distal end side of the pressing member 13, so that the clip claw member 11 is opened and the elastic force of the leaf spring 33. Has been released.

次に、図15に示すように、スライダー7を手前側に引き、操作ワイヤー5を介して、接続部材10を手元側に引くと、板バネ33は接続部材10に係止して手前側に曲げられ、接続部材10を先端側へ押し出すように弾性力が働く。一方、クリップ爪部材11は閉じる。   Next, as shown in FIG. 15, when the slider 7 is pulled to the near side and the connecting member 10 is pulled to the near side through the operation wire 5, the leaf spring 33 is locked to the connecting member 10 to the near side. The elastic force acts so as to be bent and push the connecting member 10 toward the distal end side. On the other hand, the clip claw member 11 is closed.

このとき、適切な状態で組織Aを結紮できなかった場合、スライダー7にかけていた手前側に引く力を取り除く。すると、板バネ33の弾性力によって接続部材10が先端側へ戻され、クリップ爪部材11が再び開き、図14に示す開いた状態に復帰する。
そして、上述したと同様に操作し、スライダー7を引くことで、クリップ爪部材11を閉じ、組織Aを再度把持する。
At this time, when the tissue A cannot be ligated in an appropriate state, the pulling force on the near side applied to the slider 7 is removed. Then, the connection member 10 is returned to the distal end side by the elastic force of the leaf spring 33, the clip claw member 11 is opened again, and it returns to the open state shown in FIG.
Then, by operating in the same manner as described above and pulling the slider 7, the clip claw member 11 is closed and the tissue A is gripped again.

本実施形態ではクリップ2の開動作において、操作ワイヤー5を介さず、板バネ33が接続部材10を先端側へ直接押すので、操作ワイヤー5が弛んで接続部材10を操作できなくなることがなく、クリップ爪部材11を確実に開閉できるようになる。   In this embodiment, in the opening operation of the clip 2, the leaf spring 33 directly pushes the connecting member 10 toward the distal end side without the operation wire 5, so that the operation wire 5 does not loosen and the connection member 10 cannot be operated. The clip claw member 11 can be reliably opened and closed.

また、スライダー7を引くと、クリップ2が閉まり、スライダー7を離すと、クリップ2が閉まる。したがって、より簡単な構成のクリップ2の開閉機構を実現できる。   When the slider 7 is pulled, the clip 2 is closed, and when the slider 7 is released, the clip 2 is closed. Therefore, an opening / closing mechanism for the clip 2 having a simpler configuration can be realized.

一般に、操作ワイヤー5を介してスライダー7の動きをクリップ2に伝えてクリップ2を開閉する場合、スライダー7を押したとき、操作ワイヤー5が撓み、スライダー7の動きを先端のクリップ2に確実に伝えられないという課題があったが、本実施形態ではそのような課題を解決できる。   In general, when the movement of the slider 7 is transmitted to the clip 2 via the operation wire 5 and the clip 2 is opened and closed, when the slider 7 is pressed, the operation wire 5 bends and the movement of the slider 7 is reliably transferred to the clip 2 at the tip. Although there is a problem that it cannot be transmitted, this embodiment can solve such a problem.

なお、本実施形態の構成では第1実施形態に適応した例で説明しているが、第2実施例についても同じように適応が可能である。   In the configuration of the present embodiment, an example adapted to the first embodiment has been described. However, the second embodiment can be similarly adapted.

(第4実施形態)
図16及び図17に基づいて本発明の第4実施形態に係る内視鏡用結紮具について説明する。本実施形態は上述した第3実施形態のものとは次の点で相違する。
(Fourth embodiment)
An endoscope ligation tool according to a fourth embodiment of the present invention will be described with reference to FIGS. 16 and 17. This embodiment differs from that of the third embodiment described above in the following points.

本実施形態では図16に示すようにバネ部材としてコイルバネ34を採用しており、このコイルバネ34は押さえ部材13内に挿入されるとともに、接続部材10の円柱状部19と係止部23との間に設置されている。このコイルバネ34の先端は接続部材10の円柱状部19に当たり、コイルバネ34の後端は係止部23に接触し、その弾性反発力が接続部材10に対して先端方向への向きに加わるように寸法等が設定されている。   In the present embodiment, as shown in FIG. 16, a coil spring 34 is employed as a spring member. The coil spring 34 is inserted into the pressing member 13, and the connection between the columnar portion 19 and the locking portion 23 of the connecting member 10. It is installed between. The front end of the coil spring 34 hits the cylindrical portion 19 of the connection member 10, and the rear end of the coil spring 34 is in contact with the locking portion 23 so that the elastic repulsion force is applied to the connection member 10 in the direction toward the front end. Dimensions are set.

したがって、上述した第3実施形態と同様に使用する際、スライダー7による操作力を加えていないとき、接続部材10は図16に示すように押さえ部材13の先端側に位置しており、このため、クリップ爪部材11は開き、コイルバネ34の弾性力は解放された状態にある。   Therefore, when used in the same manner as in the third embodiment described above, when no operating force is applied by the slider 7, the connecting member 10 is located on the distal end side of the pressing member 13 as shown in FIG. The clip claw member 11 is opened and the elastic force of the coil spring 34 is released.

次に、図17に示すように、スライダー7を手元側に引き、操作ワイヤー5を介して、接続部材10を引くと、コイルバネ34は接続部材10と係止部23により縮められ、その弾性力が接続部材10を先端側へ押し出すように働く。一方、クリップ爪部材11は押さえ部材13内に引き込まれ、クリップ爪部材11が閉じ、組織Aを結紮する。   Next, as shown in FIG. 17, when the slider 7 is pulled toward the hand side and the connecting member 10 is pulled through the operation wire 5, the coil spring 34 is contracted by the connecting member 10 and the locking portion 23, and its elastic force Acts to push the connecting member 10 toward the distal end side. On the other hand, the clip claw member 11 is drawn into the pressing member 13, the clip claw member 11 is closed, and the tissue A is ligated.

このとき、組織Aを適切な状態で結紮できなかった場合、スライダー7にかけていた手前側に引く力を取り除く。すると、コイルバネ34の弾性力により、接続部材10が先端側へ移動し、クリップ爪部材11を開き、図16に示す開状態に戻る。   At this time, if the tissue A cannot be ligated in an appropriate state, the pulling force on the near side applied to the slider 7 is removed. Then, due to the elastic force of the coil spring 34, the connecting member 10 moves to the distal end side, opens the clip claw member 11, and returns to the open state shown in FIG.

再び、上述したと同様の操作を行って、スライダー7を引くことで、クリップ爪部材11を閉じ、組織Aを再度把持する。このような操作を、組織Aを適切な状態で結紮できるまで繰り返す。   Again, the same operation as described above is performed and the slider 7 is pulled to close the clip claw member 11 and grip the tissue A again. Such an operation is repeated until the tissue A can be ligated in an appropriate state.

本実施形態によれば、上述した第3実施形態の効果に加え、弾性部としてコイルバネ34を用いるので、上述した第3実施形態よりも大きな弾性力を確実に得ることができ、長手方向における先端側に強い力を加えることにより、クリップ爪部材11の確実な開動作が可能となる。   According to the present embodiment, since the coil spring 34 is used as the elastic portion in addition to the effects of the third embodiment described above, a larger elastic force than that of the third embodiment described above can be obtained reliably, and the tip in the longitudinal direction can be obtained. By applying a strong force to the side, the clip pawl member 11 can be reliably opened.

(第5実施形態)
図18乃至図23に基づいて本発明の第5実施形態に係る内視鏡用結紮具について説明する。本実施形態は上述した第1実施形態のものとは次の点で相違する。
(Fifth embodiment)
An endoscope ligation tool according to a fifth embodiment of the present invention will be described with reference to FIGS. This embodiment is different from that of the first embodiment described above in the following points.

すなわち、押さえ部材13の真ん中付近に設けられていた羽根部21の代わりに、その押さえ部材13の先端に外方へ張り出すフランジ状の係止部35を形成するものである。また、シース4の先端に設けられていたストッパー部8の代わりにシース4の先端から押さえ部材13の長さ程度離れた位置に外方へ張り出すフランジ状の小径部36をシース4に設けたものである。この小径部36の先端により係止部35に当接する第1のストッパー36aを形成し、小径部36の後端により大径部22の先端が当接する第2のストッパー36bを形成する。その他の構成は、上述した第1実施形態と同様である。   That is, instead of the blade portion 21 provided in the vicinity of the center of the pressing member 13, a flange-like locking portion 35 that protrudes outward is formed at the tip of the pressing member 13. Further, instead of the stopper portion 8 provided at the distal end of the sheath 4, a flange-like small-diameter portion 36 is provided on the sheath 4 that protrudes outward from the distal end of the sheath 4 to a position that is approximately the length of the pressing member 13. Is. A first stopper 36 a that contacts the locking portion 35 is formed by the tip of the small diameter portion 36, and a second stopper 36 b that contacts the tip of the large diameter portion 22 is formed by the rear end of the small diameter portion 36. Other configurations are the same as those of the first embodiment described above.

上記係止部35の外径はシース4の内径より小さく、小径部36の内径よりも大きい。小径部36の内径は押さえ部材13の係止部35及び大径部22を除いた部分の外径より大きい寸法設定となっている。また、小径部36はシース4の一部を外周から潰すことで構成したり、別部品を接続したりして構成できる。   The outer diameter of the locking portion 35 is smaller than the inner diameter of the sheath 4 and larger than the inner diameter of the small diameter portion 36. The inner diameter of the small diameter portion 36 is larger than the outer diameter of the portion excluding the locking portion 35 and the large diameter portion 22 of the pressing member 13. Moreover, the small diameter part 36 can be comprised by crushing a part of sheath 4 from outer periphery, or can be comprised by connecting another component.

図18に示すように、小径部36の手元端からシース4の先端までの長さ「a」は押さえ部材13の大径部22の第1のストッパー36aから押さえ部材13の先端までの長さ「b」に対して同一の長さか若干短めの長さとなっている。   As shown in FIG. 18, the length “a” from the proximal end of the small diameter portion 36 to the distal end of the sheath 4 is the length from the first stopper 36 a of the large diameter portion 22 of the pressing member 13 to the distal end of the pressing member 13. The length is the same or slightly shorter than “b”.

次に、本実施形態の内視鏡用結紮具の使用方法について説明する。上述した第1実施形態と同様な手順で使用されるが、以下のような相違がある。   Next, a method for using the endoscope ligation tool of the present embodiment will be described. The same procedure as in the first embodiment described above is used, but there are the following differences.

係止部35がシース4における小径部36の第1のストッパー36aに突き当たるまでスライダー7を手前に引くことで、図18に示すようにクリップ2の全体をシース4内に収納する。このクリップ収納状態で内視鏡に挿入し、シース4の先端を内視鏡から体腔内に突き出す。そして、スライダー7を先端側に押すと、クリップ2の全体がシース4に対して先端側へ移動し、図19に示すように、押さえ部材13の大径部22の先端部分がシース4の小径部36における第2のストッパー36bに突き当たる。   The entire clip 2 is accommodated in the sheath 4 as shown in FIG. 18 by pulling the slider 7 toward the front until the locking portion 35 comes into contact with the first stopper 36a of the small diameter portion 36 in the sheath 4. The clip 4 is inserted into the endoscope with the clip stored, and the distal end of the sheath 4 is projected from the endoscope into the body cavity. When the slider 7 is pushed to the distal end side, the entire clip 2 moves toward the distal end side with respect to the sheath 4, and the distal end portion of the large diameter portion 22 of the pressing member 13 is the small diameter of the sheath 4 as shown in FIG. It abuts against the second stopper 36b in the portion 36.

スライダー7を先端側へ更に押すと、クリップ爪部材11が押さえ部材13から先端側へ押し出され、クリップ爪部材11は、押さえ部材13のブリッジ部26により強制的に開かれる(図19を参照)。   When the slider 7 is further pushed to the tip side, the clip claw member 11 is pushed out from the holding member 13 to the tip side, and the clip claw member 11 is forcibly opened by the bridge portion 26 of the holding member 13 (see FIG. 19). .

内視鏡に対して、シース4を押し込むことにより、クリップ2を患部(出血部)に押し付け、その後、スライダー7を手元側に引き、クリップ2をシース4内に引き込む。これにより、クリップ爪部材11がシース4内に引き込まれることで、クリップ爪部材11は患部の組織Aを仮結紮した状態となる(図20を参照)。   By pushing the sheath 4 against the endoscope, the clip 2 is pressed against the affected part (bleeding part), and then the slider 7 is pulled toward the hand side and the clip 2 is drawn into the sheath 4. As a result, the clip claw member 11 is pulled into the sheath 4 so that the clip claw member 11 temporarily ligates the affected tissue A (see FIG. 20).

この仮結紮状態で、出血が十分止まっていれば、本結紮に移るが、患部から外れて結紮してしまった場合には出血が収まらない。このため、再結紮を行う。これは、スライダー7を先端側に押すことで、上述と同じ動作により、クリップ爪部材11を開かせ、再度、同様な作業により患部の結紮を行うものである。   If the bleeding has stopped sufficiently in this temporary ligation state, the ligation is transferred to the main ligation. For this reason, religation is performed. In this case, the clip claw member 11 is opened by the same operation as described above by pushing the slider 7 toward the distal end, and the affected part is ligated again by the same operation.

そして、仮結紮がうまくいった場合は、スライダー7をさらに手前に引くことで、クリップ爪部材11を押さえ部材内に引き込み、本結紮を行う(図21を参照)。この後の作用は上述した第1実施形態のものと同様である。   If the temporary ligation is successful, the slider 7 is pulled further forward to pull the clip claw member 11 into the pressing member and perform the final ligation (see FIG. 21). The subsequent operation is the same as that of the first embodiment described above.

本実施形態では上述した第1実施形態と同一の効果を奏する。さらに以下のような効果も奏する。つまり、可動の羽根部は可動とするが故に、シース内に長期に羽根部を折りたたんだ状態にしておくと、羽根部の持つ弾性力が失われ、シース先端に引っかかるように羽根部が広がらなくなる虞があるが、本実施形態では固定の係止部35としたことにより、シース4と押さえ部材13を確実に固定可能である。   In the present embodiment, the same effects as those of the first embodiment described above can be obtained. In addition, the following effects are also achieved. In other words, since the movable blade portion is movable, if the blade portion is folded in the sheath for a long time, the elastic force of the blade portion is lost, and the blade portion does not spread so as to be caught by the sheath tip. Although there is a possibility, the sheath 4 and the pressing member 13 can be reliably fixed by using the fixed locking portion 35 in the present embodiment.

また、本実施形態での仮結紮は、クリップ爪部材11をシース4内に引き込むことで行い、本結紮はクリップ爪部材11を押さえ部材13内に引き込むことで行うという、独立した作用によって行われる。また、クリップ2は、シース4から切り離された後も患部を結紮した状態を保持しなければならず、クリップ爪部材11と押さえ部材11の間にある程度の摩擦力を必要とする。この摩擦力は、再結紮(仮結紮後に再度クリップ爪部材11を開くこと)の際に、クリップ爪部材11を押さえ部材13から押し出す際の妨げになってしまう可能性があるが、本実施形態では、仮結紮ではクリップ爪部材11が押さえ部材13に入らないため、確実にクリップ爪部材11の開き動作が行える。   Further, the temporary ligation in the present embodiment is performed by pulling the clip claw member 11 into the sheath 4, and this ligation is performed by an independent action of pulling the clip claw member 11 into the holding member 13. . Further, the clip 2 must maintain the ligated state after being detached from the sheath 4, and requires a certain amount of frictional force between the clip claw member 11 and the pressing member 11. This frictional force may interfere with pushing out the clip claw member 11 from the pressing member 13 during religation (opening the clip claw member 11 again after temporary ligation). Then, since the clip claw member 11 does not enter the holding member 13 in the temporary ligation, the opening operation of the clip claw member 11 can be reliably performed.

本発明は前述した実施形態のものに限定されるものではなく、他の形態にも適用が可能である。   The present invention is not limited to the embodiment described above, and can be applied to other forms.

(付記)
1.体腔内の生体組織を結紮したクリップを体腔内に留置するようにした結紮装置において、生体組織を結紮する開閉自在なクリップ爪部材及びこのクリップ爪部材に被嵌する押さえ部材を有したクリップと、上記クリップを上記クリップ爪部材が外へ露出しない状態で収納可能なシースと、上記シース内にあって進退自在な操作ワイヤーと、上記操作ワイヤーの遠位側に設けられ、上記クリップ爪部材に接続可能な接続手段と、上記操作ワイヤーを進退操作する操作部と、上記シースの先端から生体組織を結紮可能な位置に突き出た上記クリップを上記シースの先端部に保持し、上記操作ワイヤーを押し引き操作により、上記クリップ爪部材を開閉可能な範囲で上記押さえ部材の移動を規制する移動阻止手段と、
上記操作ワイヤーを手前に牽引することにより生体組織を把捉した状態での上記クリップを上記シースから解き放す解放手段と、を備えたことを特徴とする結紮装置。
2.1項の結紮装置において、上記移動阻止手段は、上記シースに対して上記押さえ部材の先端側への移動を防止する手段と、上記押さえ部材の手元側への移動を防止する手段を含むことを特徴とするもの。
3.2項の結紮装置において、上記押さえ部材の手元側への移動を防止する手段は、上記押さえ部材に突没自在に設けられた羽根と、上記押さえ部材が上記シースの先端から突き出されることで拡開した上記羽根と当接し上記押さえ部材が上記シース内に引き込まれることを阻止する第1のストッパーとからなることを特徴とするもの。
4.3項の結紮装置において、上記羽根は、外方へ向かって拡がる弾性的な付勢力を具有し、上記シース内に収納されたときは上記押さえ部材に畳み込まれ、上記シースから外へ突き出たときは弾性的に拡がって上記第1のストッパーに当接可能であることを特徴とするもの。
5.2項の結紮装置において、上記押さえ部材の先端側への移動を防止する手段は、上記押さえ部材に設けられた外径の大きい部分と、上記押さえ部材が上記シースの先端から突き出されることで上記外径の大きい部分と当接し上記押さえ部材が上記シースから突き出ることを阻止する第2のストッパーとからなることを特徴とするもの。
6.5項の結紮装置において、上記第2のストッパーは、上記シースの先端に設けられ、上記押さえ部材の、外径の大きい部分のみが通過できない径の開口を有することを特徴とするもの。
7.5項の結紮装置において、上記押さえ部材の手元側への移動を防止する手段は、上記押さえ部材に突没自在に設けられた羽根と、上記押さえ部材が上記シースの先端から突き出されることで拡開した上記羽根と当接し上記押さえ部材が上記シース内に引き込まれることを阻止する第1のストッパーとからなり、更に、上記羽根は、上記第2のストッパーに上記押さえ部材の外径の大きい部分が突き当たったとき、上記第1のストッパーから突き出して拡開することを特徴とするもの。
8.7項の結紮装置において、上記解放手段は、上記操作ワイヤーを手前に牽引して上記接続手段の一部が破断することにより、上記操作部による上記クリップを閉じる操作力が遮断する手段を含むことを特徴とするもの。
9.8項の結紮装置において、上記押さえ部材は、上記外径の大きい部分よりも先端側に位置して設けられた強度的に弱い脆弱部を含み、上記解放手段は、上記脆弱部が破断することで、上記押さえ部材が上記シースから分離することを特徴とするもの。
10.9項の結紮装置において、上記脆弱部は、上記押さえ部材の肉厚を薄くすることで実現したことを特徴とするもの。
11.9項の結紮装置において、上記脆弱部は、上記押さえ部材の一部の断面積を少なくすることで実現したことを特徴とするもの。
(Appendix)
1. In a ligation apparatus in which a clip ligating a biological tissue in a body cavity is placed in the body cavity, an openable / closable clip claw member for ligating the biological tissue and a clip having a pressing member fitted to the clip claw member; A sheath that can store the clip in a state in which the clip claw member is not exposed to the outside, an operation wire that can be moved forward and backward in the sheath, and provided on the distal side of the operation wire and connected to the clip claw member Possible connecting means, an operating part for operating the operating wire forward and backward, and holding the clip protruding from the distal end of the sheath to a position where a living tissue can be ligated at the distal end of the sheath, and pushing and pulling the operating wire. A movement preventing means for restricting movement of the pressing member within a range in which the clip claw member can be opened and closed by an operation;
A ligation apparatus comprising: release means for releasing the clip from the sheath in a state where the living tissue is grasped by pulling the operation wire toward the front.
2.1. The ligation apparatus according to item 2.1, wherein the movement preventing means includes means for preventing movement of the pressing member toward the distal end side with respect to the sheath, and means for preventing movement of the pressing member toward the proximal side. It is characterized by that.
In the ligating apparatus according to item 3.2, the means for preventing the pressing member from moving toward the hand side includes a blade provided on the pressing member so as to protrude and retract, and the pressing member protrudes from the distal end of the sheath. And a first stopper that contacts the expanded blade and prevents the pressing member from being pulled into the sheath.
4.3. The ligation apparatus according to 4.3, wherein the blade has an elastic urging force that spreads outward, and when the blade is stored in the sheath, the blade is folded into the pressing member and is outward from the sheath. When protruding, it is elastically expanded and can contact the first stopper.
In the ligating apparatus according to Item 5.2, the means for preventing the pressing member from moving toward the distal end side includes a portion having a large outer diameter provided on the pressing member and the pressing member protruding from the distal end of the sheath. And a second stopper that abuts against the portion having the larger outer diameter and prevents the pressing member from protruding from the sheath.
6.5. The ligating apparatus according to 6.5, wherein the second stopper is provided at the distal end of the sheath and has an opening having a diameter through which only a portion having a large outer diameter of the pressing member cannot pass.
In the ligating apparatus according to Section 7.5, the means for preventing the pressing member from moving toward the hand side includes blades provided so as to be able to project and retract on the pressing member, and the pressing member protruding from the distal end of the sheath. A first stopper that contacts the expanded blade and prevents the pressing member from being pulled into the sheath, and further, the blade is connected to the second stopper by the outer diameter of the pressing member. When a large portion of the abutment hits, it protrudes from the first stopper and expands.
In the ligating apparatus according to item 8.7, the release means includes means for interrupting an operation force for closing the clip by the operation portion by pulling the operation wire forward and partially breaking the connection means. It is characterized by including.
In the ligation apparatus according to Item 9.8, the pressing member includes a weak portion that is weak in strength and is provided on a distal end side with respect to a portion having a large outer diameter. By doing so, the pressing member is separated from the sheath.
In the ligation apparatus according to item 10.9, the weakened portion is realized by reducing the thickness of the pressing member.
In the ligation apparatus according to 11.9, the weakened portion is realized by reducing a partial cross-sectional area of the pressing member.

12.10項または11項の結紮装置において、破断した接続手段の部分が上記押さえ部材の上記脆弱部より基端側に位置する上記外径の大きい部分に引っ掛るものであり、上記解放手段は、その破断した接続手段の部分を上記操作部の操作によって手元側に引くことで、上記脆弱部を破断させることを特徴とするもの。
13.12項の結紮装置において、上記押さえ部材は、上記脆弱部よりも手元側に位置して破断した接続手段の部分が引っ掛る小径部が存在することを特徴とするもの。
14.13項の結紮装置において、上記接続手段は、破断する部分よりも手元側に位置して、上記押さえ部材の上記小径部の内径より外径が大きな部分を備えることを特徴とするもの。
15.7項または8項の結紮装置において、上記押さえ部材の外径の大きい部分は、上記押さえ部材を内側から押し広げる手段により外径が大きくなることを特徴とするもの。
12. In the ligating apparatus according to item 10 or 11, the portion of the connecting means that is broken is caught by the portion having a large outer diameter located on the proximal end side with respect to the fragile portion of the pressing member, and the releasing means The fragile part is broken by pulling the broken part of the connecting means toward the hand side by operating the operation part.
13. The ligating apparatus according to item 13.12, wherein the pressing member has a small-diameter portion that is located closer to the proximal side than the fragile portion and to which the portion of the connecting means that is broken is caught.
14. The ligating apparatus according to item 14.13, wherein the connecting means includes a portion that is located closer to the hand than the portion to be broken and has an outer diameter larger than the inner diameter of the small diameter portion of the pressing member.
In the ligation apparatus according to 15.7 or 8, the outer diameter of the portion having a large outer diameter of the pressing member is increased by a means for spreading the pressing member from the inside.

16.15項の結紮装置において、上記押さえ部材を内側から押し広げる手段は、上記操作ワイヤーの遠位端に形成したワイヤー大径部分と、上記押さえ部材の内側へ突き出した少なくとも1つの突起を有し、上記突起を上記ワイヤー大径部分が外側へ押し出して上記押さえ部材の一部を弾性的に押し広げることを特徴とするもの。
17.16項の結紮装置において、上記押さえ部材の上記突起が設けてある箇所は、弾性を有する部分であることを特徴とするもの。
18.17項の結紮装置において、上記押さえ部材は、上記クリップが開閉自在なとき、上記押さえ部材を内側から押し広げる手段により、外径の大きい部分を形成していることを特徴とするもの。
19.18項の結紮装置において、上記ワイヤー大径部分は、上記クリップが開閉自在なとき、上記突起の中に入る、長手方向の長さの寸法設定となっていることを特徴とするもの。
20.19項の結紮装置において、上記押さえ部材は、上記接続手段の一部が破断することにより、生体組織を結紮している上記押さえ部材が上記シースから分離する手段を有していることを特徴とするもの。
21.20項の結紮装置において、上記押さえ部材が上記シースから分離する手段は、上記ワイヤー大径部分が上記突起から外れ、上記押さえ部材の外径の大きい部分が弾性的に内側へ戻ることで、上記押さえ部材が上記ストッパーを通過できるようになることを特徴とするもの。
22.1項の結紮装置において、上記クリップ爪部材を開閉する手段は、上記クリップ爪部材が、上記押さえ部材に対して進退することにより上記クリップ爪部材が開閉することを特徴とするもの。
23.22項の結紮装置において、上記クリップ爪部材を閉じる手段は、上記操作ワイヤーを手前に引くことにより、上記クリップ部材を上記押さえ部材に引き込み、上記クリップ部材を閉じることを特徽とするもの。
24.22項の結紮装置において、上記クリップ爪部材を開く手段は、上記クリップ爪部材を上記押さえ部材に対して前進させるとき、上記押さえ部材の先端の開口部が上記クリップ爪部材を変形させることを特徴とするもの。
25.1項、22項、23項または24項の結紮装置において、上記クリップ爪部材は、複数のアーム状脚部材を有し、複数のアーム状脚部材を少なくとも2回クロスした複数のクロス部を有したことを特徴とするもの。
26.25項の結紮装置において、上記押さえ部材は、先端側に上記クロス部が変形しなければ通過できない径の小径部を有し、それ以外の箇所は、上記クロス部が変形しなくても通過できる内径を有することを特徴とするもの。
27.23項の結紮装置において、上記クリップ爪部材を開く手段は、上記クリップ爪部材を上記押さえ部材に対して前進させるとき、上記クリップ爪部材を強制的に開くブリッジ部を上記押さえ部材に設けたことを特徴とするもの。
28.1項の結紮装置において、上記クリップ爪部材を上記押さえ部材に対して前進させるとき、上記クリップ爪部材の前進を補助する弾性部を上記押さえ部材に設けたことを特徴とするもの。
29.28項の結紮装置において、上記弾性部は、上記操作ワイヤーの動きを補助し、上記クリップ爪部材を上記押さえ部材に対して押し出す向きに上記クリップ爪部材を移動させる弾性片を含むことを特徴とするもの。
30.28項または29項の結紮装置において、上記弾性部は、その弾性力で上記接続手段または上記操作ワイヤーを上記押さえ部材に対して前進させるように設置されているバネ部材であることを特徴とするもの。
31.2項の結紮装置において、手元側への移動を防止する手段は押さえ部材に設けられた径の大きい部分と、上記シースに設けられた径の小さい部分とが引っかかることによるものであることを特徴とするもの。
32.31項の結紮装置において、上記シースと上記クリップは、相対移動可能な範囲が定められているものであることを特徴とするもの。
33.32項の結紮装置において、上記相対移動可能な範囲は、上記クリップ爪部材の長さと同等であることを特徴とするもの。
34.33項の結紮装置において、上記クリップ爪部材が上記シース内に引き込まれることで、仮結紮が可能であることを特徴とするもの。
35.34項の結紮装置において、仮結紮後に上記操作部による操作によって上記操作ワイヤーの前進操作で再度上記クリップ爪部材を開くことが可能であることを特徴とするもの。
36.35項の結紮装置において、仮結紮後更に上記操作部による操作によって上記操作ワイヤーを手前に引くことにより、上記クリップ爪部材が上記押さえ部材内に収納することにより、本結紮が可能であることを特徴とするもの。
37.36項の結紮装置において、本結紮後は上記クリップ爪部材を再度上記押さえ部材内から突き出すことができないことを特徴とするもの。
38.37項の結紮装置において、上記クリップ爪部材と上記押さえ部材との摩擦抵抗により上記クリップ爪部材の再突き出しを不可能にしていることを特徴とするもの。
16. In the ligating apparatus according to item 16.15, the means for expanding the pressing member from the inside includes a wire large-diameter portion formed at the distal end of the operation wire and at least one protrusion protruding to the inside of the pressing member. Then, the wire large-diameter portion pushes the protrusion outward and elastically pushes a part of the pressing member.
17. The ligation apparatus according to item 17, wherein the portion of the pressing member where the protrusion is provided is an elastic portion.
18. The ligating apparatus according to item 18.17, wherein the pressing member forms a portion having a large outer diameter by means for expanding the pressing member from the inside when the clip is freely opened and closed.
19. The ligation apparatus according to item 19.18, wherein the large-diameter portion of the wire has a length setting in a longitudinal direction that enters the protrusion when the clip is freely opened and closed.
20. The ligation apparatus according to claim 20.19, wherein the pressing member has means for separating the pressing member ligating the living tissue from the sheath when a part of the connecting means is broken. Features
In the ligating apparatus according to item 21.20, the means for separating the pressing member from the sheath is that the large-diameter portion of the wire is detached from the protrusion, and the large-diameter portion of the pressing member is elastically returned to the inside. The pressing member can pass through the stopper.
22. The ligating apparatus according to Item 22.1, wherein the means for opening and closing the clip claw member opens and closes the clip claw member by moving the clip claw member forward and backward relative to the pressing member.
23. The ligating apparatus according to item 23.22, characterized in that the means for closing the clip claw member draws the clip member into the pressing member and closes the clip member by pulling the operation wire forward. .
24. The ligation apparatus according to item 24.22, wherein the means for opening the clip claw member causes the opening of the tip of the pressing member to deform the clip claw member when the clip claw member is advanced with respect to the pressing member. It is characterized by.
The ligation apparatus according to item 25.1, item 22, 23 or 24, wherein the clip claw member has a plurality of arm-like leg members, and a plurality of cross portions obtained by crossing the plurality of arm-like leg members at least twice. Characterized by having
26. The ligation apparatus according to 26.25, wherein the pressing member has a small diameter portion on a tip side that cannot pass unless the cross portion is deformed, and other portions may be formed even if the cross portion is not deformed. It has an inner diameter that can pass through.
27. The ligation apparatus according to item 27.23, wherein the means for opening the clip claw member is provided with a bridge portion that forcibly opens the clip claw member when the clip claw member is advanced with respect to the press member. It is characterized by that.
The ligation apparatus according to 28.1, wherein when the clip claw member is moved forward with respect to the pressing member, an elastic portion for assisting the advancement of the clip claw member is provided in the pressing member.
29.28 The ligation apparatus according to 29.28, wherein the elastic portion includes an elastic piece that assists the movement of the operation wire and moves the clip claw member in a direction to push the clip claw member against the pressing member. Features
30. The ligating apparatus according to item 30 or 29, wherein the elastic part is a spring member installed so that the connecting means or the operation wire is advanced with respect to the pressing member by its elastic force. Things to do.
In the ligating apparatus according to item 31.2, the means for preventing the movement toward the proximal side is caused by a large diameter portion provided in the pressing member and a small diameter portion provided in the sheath being caught. It is characterized by.
32. The ligating apparatus according to item 32.31, wherein the sheath and the clip have a range in which relative movement is defined.
33. The ligation apparatus according to item 33.32, wherein the relatively movable range is equal to the length of the clip claw member.
34. The ligation apparatus according to item 34.33, wherein the clip claw member is pulled into the sheath so that temporary ligation is possible.
35. The ligation apparatus according to Item 35.34, wherein the clip claw member can be opened again by a forward operation of the operation wire by an operation by the operation unit after temporary ligation.
In the ligation apparatus according to item 36.35, after the temporary ligation, the operation wire is pulled further toward the front by the operation of the operation unit so that the clip claw member is housed in the pressing member, thereby allowing the ligation. It is characterized by that.
37. The ligation apparatus according to 37.36, wherein after the ligation, the clip claw member cannot be protruded from the pressing member again.
38. The ligation apparatus according to item 38.37, wherein the clip claw member cannot be re-extruded by frictional resistance between the clip claw member and the pressing member.

第1実施形態に係る内視鏡用結紮具全体の説明図であって先端部分を断面して示した図である。It is explanatory drawing of the whole endoscope ligation tool which concerns on 1st Embodiment, Comprising: It is the figure which showed the front-end | tip part in cross section. 同じく第1実施形態に係る内視鏡用結紮具のクリップの斜視図である。It is a perspective view of the clip of the ligation tool for endoscopes similarly concerning 1st Embodiment. 同じく第1実施形態に係る内視鏡用結紮具のクリップの押さえパイプ状部材の先端部分を示す斜視図である。It is a perspective view which shows the front-end | tip part of the holding | suppressing pipe-shaped member of the clip of the ligation tool for endoscopes similarly concerning 1st Embodiment. 同じく第1実施形態に係る内視鏡用結紮具を使用する手順の説明図である。It is explanatory drawing of the procedure which similarly uses the ligation tool for endoscopes which concerns on 1st Embodiment. 同じく第1実施形態に係る内視鏡用結紮具を使用する手順の説明図である。It is explanatory drawing of the procedure which similarly uses the ligation tool for endoscopes which concerns on 1st Embodiment. 同じく第1実施形態に係る内視鏡用結紮具を使用する手順の説明図である。It is explanatory drawing of the procedure which similarly uses the ligation tool for endoscopes which concerns on 1st Embodiment. 同じく第1実施形態に係る内視鏡用結紮具を使用する手順の説明図である。It is explanatory drawing of the procedure which similarly uses the ligation tool for endoscopes which concerns on 1st Embodiment. 同じく第1実施形態に係る内視鏡用結紮具を使用する手順の説明図である。It is explanatory drawing of the procedure which similarly uses the ligation tool for endoscopes which concerns on 1st Embodiment. 第2実施形態に係る内視鏡用結紮具の先端部分の縦断面図である。It is a longitudinal cross-sectional view of the front-end | tip part of the ligation tool for endoscopes which concerns on 2nd Embodiment. 同じく第2実施形態に係る内視鏡用結紮具を使用する手順の説明図である。It is explanatory drawing of the procedure which similarly uses the ligation tool for endoscopes which concerns on 2nd Embodiment. 同じく第2実施形態に係る内視鏡用結紮具を使用する手順の説明図である。It is explanatory drawing of the procedure which similarly uses the ligation tool for endoscopes which concerns on 2nd Embodiment. 同じく第2実施形態に係る内視鏡用結紮具を使用する手順の説明図である。It is explanatory drawing of the procedure which similarly uses the ligation tool for endoscopes which concerns on 2nd Embodiment. 同じく第2実施形態に係る内視鏡用結紮具を使用する手順の説明図である。It is explanatory drawing of the procedure which similarly uses the ligation tool for endoscopes which concerns on 2nd Embodiment. 第3実施形態に係る内視鏡用結紮具の先端部分の使用時の縦断面図である。It is a longitudinal cross-sectional view at the time of use of the front-end | tip part of the ligation tool for endoscopes which concerns on 3rd Embodiment. 同じく第3実施形態に係る内視鏡用結紮具の先端部分の使用時の縦断面図である。It is a longitudinal cross-sectional view at the time of use of the front-end | tip part of the ligation tool for endoscopes similarly concerning 3rd Embodiment. 第4実施形態に係る内視鏡用結紮具の先端部分の使用時の縦断面図である。It is a longitudinal cross-sectional view at the time of use of the front-end | tip part of the ligation tool for endoscopes which concerns on 4th Embodiment. 同じく第4実施形態に係る内視鏡用結紮具の先端部分の使用時の縦断面図である。It is a longitudinal cross-sectional view at the time of use of the front-end | tip part of the ligation tool for endoscopes similarly concerning 4th Embodiment. 第5実施形態に係る内視鏡用結紮具の先端部分の縦断面図である。It is a longitudinal cross-sectional view of the front-end | tip part of the ligation tool for endoscopes which concerns on 5th Embodiment. 同じく第5実施形態に係る内視鏡用結紮具の先端部分の使用時の縦断面図である。It is a longitudinal cross-sectional view at the time of use of the front-end | tip part of the ligation tool for endoscopes similarly concerning 5th Embodiment. 同じく第5実施形態に係る内視鏡用結紮具の先端部分の使用時の縦断面図である。It is a longitudinal cross-sectional view at the time of use of the front-end | tip part of the ligation tool for endoscopes similarly concerning 5th Embodiment. 同じく第5実施形態に係る内視鏡用結紮具の先端部分の使用時の縦断面図である。It is a longitudinal cross-sectional view at the time of use of the front-end | tip part of the ligation tool for endoscopes similarly concerning 5th Embodiment. 同じく第5実施形態に係る内視鏡用結紮具の先端部分の使用時の縦断面図である。It is a longitudinal cross-sectional view at the time of use of the front-end | tip part of the ligation tool for endoscopes similarly concerning 5th Embodiment. 同じく第5実施形態に係る内視鏡用結紮具の先端部分の使用時の縦断面図である。It is a longitudinal cross-sectional view at the time of use of the front-end | tip part of the ligation tool for endoscopes similarly concerning 5th Embodiment.

符号の説明Explanation of symbols

1…装置本体
2…クリップ
4…シース
5…操作ワイヤー
7…スライダー
8…ストッパー
8a…第1のストッパー
8b…第2のストッパー
10…接続部材
11…クリップ爪部材
13…押さえ部材
21…羽根部
25…脆弱部
DESCRIPTION OF SYMBOLS 1 ... Apparatus main body 2 ... Clip 4 ... Sheath 5 ... Operation wire 7 ... Slider 8 ... Stopper 8a ... 1st stopper 8b ... 2nd stopper 10 ... Connection member 11 ... Clip claw member 13 ... Holding member 21 ... Blade | wing part 25 ... Vulnerable part

Claims (6)

体腔内の生体組織を結紮したクリップを体腔内に留置するようにした結紮装置において、
生体組織を結紮する開閉自在なクリップ爪部材及びこのクリップ爪部材に被嵌する押さえ部材を有したクリップと、
シースと、
上記シース内にあって進退自在な操作部材と、
上記操作部材の遠位側に設けられ、上記クリップ爪部材を開放可能に接続する接続手段と、
上記操作部材を進退操作する操作手段と、
上記押さえ部材と上記クリップ爪部材との間に上記クリップ爪部材を付勢する弾性部と、
を備えたことを特徴とする結紮装置。
In the ligation apparatus in which the clip ligating the biological tissue in the body cavity is placed in the body cavity,
A clip claw member that can be freely opened and closed to ligate a living tissue, and a clip having a pressing member that fits over the clip claw member;
A sheath,
An operation member which is in the sheath and is freely movable back and forth;
A connection means provided on the distal side of the operation member, and releasably connecting the clip claw member;
Operating means for advancing and retracting the operating member;
An elastic portion for biasing the clip claw member between the pressing member and the clip claw member;
A ligation apparatus characterized by comprising:
体腔内の生体組織を結紮したクリップを体腔内に留置するようにした結紮装置において、
生体組織を結紮する開閉自在なクリップ爪部材及びこのクリップ爪部材に被嵌する押さえ部材を有したクリップと、
シースと、
上記シース内にあって進退自在な操作部材と、
上記操作部材の遠位側に設けられ、上記クリップ爪部材を開放可能に接続する接続手段と、
上記操作部材を進退操作する操作手段と、
上記押さえ部材に対し前進する向きに上記クリップ爪部材を付勢する弾性部と、
を備えたことを特徴とする結紮装置。
In the ligation apparatus in which the clip ligating the biological tissue in the body cavity is placed in the body cavity,
A clip claw member that can be freely opened and closed to ligate a living tissue, and a clip having a pressing member that fits over the clip claw member;
A sheath,
An operation member which is in the sheath and is freely movable back and forth;
A connection means provided on the distal side of the operation member, and releasably connecting the clip claw member;
Operating means for advancing and retracting the operating member;
An elastic portion that urges the clip claw member in a direction to advance with respect to the pressing member;
A ligation apparatus characterized by comprising:
上記弾性部は、上記押さえ部材に対して前進させる向きに上記クリップ爪部材を付勢する弾性力を有した弾性片を含むことを特徴とする請求項1または請求項2の結紮装置。 The ligation apparatus according to claim 1 or 2, wherein the elastic portion includes an elastic piece having an elastic force that urges the clip claw member in a direction to be advanced with respect to the pressing member. 上記弾性部は、上記押さえ部材に対して前進させる向きに上記クリップ爪部材を付勢する弾性力を有したバネ部材であることを特徴とする請求項1または請求項2の結紮装置。 The ligation apparatus according to claim 1 or 2, wherein the elastic portion is a spring member having an elastic force that urges the clip claw member in a direction to be advanced with respect to the pressing member. 上記弾性部は、上記押さえ部材に対して前進させる向きに上記クリップ爪部材を付勢する弾性力を有したコイルバネ部材であることを特徴とする請求項1または請求項2の結紮装置。 The ligation apparatus according to claim 1 or 2, wherein the elastic portion is a coil spring member having an elastic force that urges the clip claw member in a direction to be advanced with respect to the pressing member. 上記シースに対して上記押さえ部材が手元側へ移動することを阻止する手段を備えたことを特徴とする請求項1〜5のいずれか一つの結紮装置。 The ligating apparatus according to any one of claims 1 to 5, further comprising means for preventing the pressing member from moving toward the proximal side with respect to the sheath.
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