JP4423474B2 - End of the forceps for endoscope - Google Patents

End of the forceps for endoscope Download PDF

Info

Publication number
JP4423474B2
JP4423474B2 JP2005188918A JP2005188918A JP4423474B2 JP 4423474 B2 JP4423474 B2 JP 4423474B2 JP 2005188918 A JP2005188918 A JP 2005188918A JP 2005188918 A JP2005188918 A JP 2005188918A JP 4423474 B2 JP4423474 B2 JP 4423474B2
Authority
JP
Japan
Prior art keywords
distal end
forceps
pair
tip
flexible sheath
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2005188918A
Other languages
Japanese (ja)
Other versions
JP2006334348A (en
Inventor
誠 西村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
River Seiko Co Ltd
Original Assignee
River Seiko Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by River Seiko Co Ltd filed Critical River Seiko Co Ltd
Priority to JP2005188918A priority Critical patent/JP4423474B2/en
Publication of JP2006334348A publication Critical patent/JP2006334348A/en
Application granted granted Critical
Publication of JP4423474B2 publication Critical patent/JP4423474B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Surgical Instruments (AREA)
  • Endoscopes (AREA)

Description

本発明は、内視鏡の処置具案内管路に通して使用される内視鏡用鉗子の先端部に関する。  The present invention relates to a distal end portion of an endoscopic forceps used through a treatment instrument guide conduit of an endoscope.

内視鏡用鉗子の先端部には一般に、内視鏡の処置具案内管路に挿脱自在な可撓性シースの先端にステンレス鋼製の先端本体が取り付けられて、一対の鉗子片が先端本体の先端部分に前方に向かって開閉できるように並列に並んで回動自在に支持されている。そして、一対の鉗子片を回動駆動するために各鉗子片から後方に駆動アームが突出形成されていて、可撓性シース内に挿通された操作ワイヤーで可撓性シースの後端側から一対の駆動アームを動作させて、一対の鉗子片を開閉駆動することができるようになっている（例えば、特許文献１）。
特開平１０−１７９６０１号公報 In general, the distal end portion of the forceps for endoscope has a stainless steel distal end body attached to the distal end of a flexible sheath that can be inserted into and removed from the treatment instrument guide conduit of the endoscope, and a pair of forceps pieces are distal ends. The main body is rotatably supported side by side in parallel so that it can be opened and closed forward. In order to rotationally drive the pair of forceps pieces, driving arms are formed to protrude rearward from the forceps pieces, and a pair of forceps is inserted from the rear end side of the flexible sheath with an operation wire inserted into the flexible sheath. The pair of forceps pieces can be opened and closed by operating the drive arm (for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-179601

図１３は、前述のような従来の内視鏡用鉗子の先端部の可撓性シース３１の先端に取り付けられた先端本体３２を示している。先端本体３２には先端側に開口するスリット３３が形成されていて、図示されていない一対の駆動アームがスリット３３内に緩く挟まれた状態に配置され、軸受孔３４に通される支持軸を中心にして駆動アームが回動する。
そして、そのような構造において良好な作動を得るためにはスリット３３の幅の寸法精度が極めて重要であるが、スリット３３の両側壁は薄くて変形し易いので、スリット３３を切削加工する際や軸受孔３４に支持軸を固定するためのカシメ作業の際等にスリット３３を変形させてしまう場合があり、それが鉗子片の開閉作動不良の大きな原因になっていた。FIG. 13 shows a distal end body 32 attached to the distal end of the flexible sheath 31 at the distal end portion of the conventional endoscopic forceps as described above. The tip body 32 is formed with a slit 33 that opens to the tip side, and a pair of drive arms (not shown) are arranged in a state of being loosely sandwiched in the slit 33, and a support shaft that passes through the bearing hole 34 is provided. The drive arm rotates about the center.
In order to obtain good operation in such a structure, the dimensional accuracy of the width of the slit 33 is extremely important. However, since both side walls of the slit 33 are thin and easily deformed, When the caulking operation for fixing the support shaft to the bearing hole 34 is performed, the slit 33 may be deformed, which is a major cause of the failure to open and close the forceps piece.

また、一対の鉗子片を高周波電源の正極と負極に別々に接続して高周波処置を行ういわゆるバイポーラの高周波処置用鉗子等を構成するためには、先端本体３２を電気絶縁性の非金属材で形成する必要が生じるがスリット３３の両側壁部分の強度確保が難しく、また、一対の鉗子片を互いに絶縁分離するのが困難なため実用性のある高周波処置用鉗子を構成するのが困難であった。  In order to construct a so-called bipolar high-frequency treatment forceps or the like for performing high-frequency treatment by separately connecting a pair of forceps pieces to a positive electrode and a negative electrode of a high-frequency power source, the tip body 32 is made of an electrically insulating non-metallic material. However, it is difficult to secure the strength of both side walls of the slit 33, and it is difficult to insulate and separate the pair of forceps pieces from each other, so that it is difficult to construct a practical high-frequency treatment forceps. It was.

本発明はそのような問題を解決するためになされたものであり、鉗子片の開閉作動が常に良好で、高周波処置を行うために先端本体を電気絶縁性の非金属材で形成しても十分な強度と良好な作動を確保することができる内視鏡用鉗子の先端部を提供することを目的とする。  The present invention has been made to solve such a problem, and the forceps piece is always open / closed, and it is sufficient to form the tip body of an electrically insulating non-metallic material in order to perform high-frequency treatment. An object of the present invention is to provide a distal end portion of an endoscopic forceps capable of ensuring sufficient strength and good operation.

内視鏡の処置具案内管路に挿脱自在な可撓性シースの先端に設けられた先端本体と、先端本体の先端部分に前方に向かって開閉できるように並列に並んで回動自在に配置された一対の鉗子片と、一対の鉗子片を回動駆動するために一対の鉗子片の各々から後方に突出形成された一対の駆動アームと、可撓性シースの後端側からの遠隔操作により一対の駆動アームを動作させて一対の鉗子片を開閉駆動するように可撓性シース内に挿通された操作ワイヤーとが設けられた内視鏡用鉗子の先端部において、一対の駆動アームの間に挟まれる状態に先端本体から前方に向かって突出形成される駆動アーム支持用中央隔壁に対して一対の駆動アームが各々回動自在に支持され、先端本体の側壁が駆動アームの動作範囲と干渉する部分を切り削いだ形状に形成され、切り削いだ形状に形成された部分が駆動アーム支持用中央隔壁と同一面に形成され、先端本体の側壁の切り削いだ形状に形成された部分の縁部が先端本体の軸方向に対して斜め向きに形成され、操作ワイヤーを可撓性シース内から先端本体外に引き出すためのワイヤー通過孔が、先端本体の側壁の切り削いだ形状に形成された部分の駆動アーム支持用中央隔壁と同一面に形成された部分と先端本体の軸方向に対して斜め向きに形成された縁部とにまたがって開口形成され、操作ワイヤーの先端が先端本体外において各駆動アームに連結される。 A distal end body provided at the distal end of a flexible sheath that can be inserted into and removed from an endoscope treatment instrument guide conduit, and can be pivoted in parallel so that it can be opened and closed forward at the distal end portion of the distal end body. A pair of forceps pieces, a pair of drive arms formed to project rearward from each of the pair of forceps pieces for rotationally driving the pair of forceps pieces, and a remote from the rear end side of the flexible sheath A pair of drive arms at the distal end of an endoscopic forceps provided with an operation wire inserted into the flexible sheath so as to open and drive the pair of forceps pieces by operating the pair of drive arms. A pair of drive arms are rotatably supported with respect to a central partition for supporting the drive arm that is formed to project forward from the tip body while being sandwiched between the tip body, and the side wall of the tip body is within the operating range of the drive arm Cut out the part that interferes with The formed and cut-off part is formed on the same plane as the drive arm support central partition, and the edge of the cut-off part of the side wall of the tip body is in the axial direction of the tip body. A central partition wall for supporting the drive arm in a portion formed in an oblique direction with respect to the wire passing hole for drawing the operation wire from the inside of the flexible sheath to the outside of the tip body, which is formed by cutting the side wall of the tip body. And an opening formed across the edge formed obliquely with respect to the axial direction of the tip body, and the tip of the operation wire is connected to each drive arm outside the tip body.

なお、先端本体には後端側から可撓性シースの先端部分が差し込まれるための中空孔が形成されるとともに外周側から切削孔が形成され、ワイヤー通過孔は、中空孔が先端本体の側壁の切り削いだ形状に形成された部分の縁部を破る形で形成されると共に切削孔が先端本体の側壁の切り削いだ形状に形成された部分を破る形で全体として一つながりに形成されていてもよい。
The distal end body has a hollow hole into which the distal end portion of the flexible sheath is inserted from the rear end side, and a cutting hole is formed from the outer peripheral side. The wire passage hole has a hollow hole on the side wall of the distal end body. It is formed in a form that breaks the edge of the part formed in the cut shape of the metal, and the cutting hole is formed in one line as a whole in a form that breaks the part formed in the cut shape of the side wall of the tip body. May be.

本発明の内視鏡用鉗子の先端部によれば、一対の駆動アームの間に挟まれる状態に先端本体から前方に向かって駆動アーム支持用中央隔壁を突出形成して、一対の駆動アームを各々駆動アーム支持用中央隔壁に回動自在に支持したことにより、鉗子片の開閉に際し常に良好な作動が得られ、高周波処置を行うために先端本体を電気絶縁性の非金属材で形成しても十分な強度と良好な作動を確保することができる。  According to the distal end portion of the endoscopic forceps of the present invention, the central partition for supporting the drive arm is projected forward from the distal end body so as to be sandwiched between the pair of drive arms, and the pair of drive arms is mounted. Each of the drive arm support central partitions is pivotally supported, so that a good operation is always obtained when the forceps piece is opened and closed, and the tip body is made of an electrically insulating non-metallic material for high frequency treatment. Also, sufficient strength and good operation can be ensured.

以下、図面を参照して本発明の実施例を具体的に説明する。
図１、図２及び図３は本発明の第１の実施例の内視鏡用鉗子の先端部を示している。図１は鉗子片５が開いた状態の側面断面図、図２は鉗子片５が閉じた状態の側面図、図３は平面部分断面図である。１は、図示されていない内視鏡の処置具案内管路に挿脱される可撓性シースであり、この実施例ではステンレス鋼線を密着巻きしたコイルが使用されている。ただし、機械的強度の大きなプラスチック材（例えばＰＥＥＫ樹脂等）でコイルを形成してもよく、コイルに代えて薄肉のＰＥＥＫ樹脂、ポリイミド樹脂又はフッ素樹脂製のチューブ等のような可撓性チューブ等を用いてもよい。可撓性シース１の先端にはステンレス鋼等の金属製の先端本体２が連結固着されている。先端本体２には可撓性シース１の先端部分が差し込まれる中空孔３が後端側から形成されていて、可撓性シース１がそこに差し込まれて半田付け、圧着又はカシメ等で固着されている。Embodiments of the present invention will be specifically described below with reference to the drawings.
1, 2 and 3 show the distal end portion of the forceps for endoscope according to the first embodiment of the present invention. FIG. 1 is a side sectional view of the forceps piece 5 in an opened state, FIG. 2 is a side view of the forceps piece 5 in a closed state, and FIG. 3 is a plan partial sectional view. Reference numeral 1 denotes a flexible sheath that is inserted into and removed from a treatment instrument guide line of an endoscope (not shown). In this embodiment, a coil in which a stainless steel wire is tightly wound is used. However, the coil may be formed of a plastic material having a high mechanical strength (for example, PEEK resin), or a flexible tube such as a thin PEEK resin, polyimide resin or fluororesin tube instead of the coil. May be used. A distal end body 2 made of metal such as stainless steel is connected and fixed to the distal end of the flexible sheath 1. A hollow hole 3 into which the distal end portion of the flexible sheath 1 is inserted is formed in the distal end body 2 from the rear end side, and the flexible sheath 1 is inserted therein and fixed by soldering, pressure bonding, caulking or the like. ing.

先端本体２の先端部分には、導電性のステンレス鋼製の一対の鉗子片５，５が前方に向かって開閉できるように並列に並んで回動自在に配置され、その一対の鉗子片５，５を回動駆動するための駆動アーム６，６が、鉗子片５，５の各々から鉗子片５，５と一体に後方に向かって突出形成されている。なお、この実施例では鉗子片５が生検組織を採取できるカップ状に形成されているが、把持片状或いは刃状その他の形状に形成されたものであってもよい。  A pair of conductive stainless steel forceps pieces 5, 5 are rotatably arranged in parallel so as to be openable and closable forwardly at the tip portion of the tip body 2. Drive arms 6 and 6 for rotationally driving 5 are formed so as to protrude rearward from the forceps pieces 5 and 5 integrally with the forceps pieces 5 and 5. In this embodiment, the forceps piece 5 is formed in a cup shape from which a biopsy tissue can be collected. However, the forceps piece 5 may be formed in a gripping piece shape, a blade shape, or other shapes.

断面形状が正円形をなす先端本体２の先端部分の直径の位置には、先端本体２を単体で示す図４に分かり易く示されるように、一対の駆動アーム６，６を回動自在に支持するための一定の厚みの板状の駆動アーム支持用中央隔壁４が前方に向かって突出形成されている。そして、図２におけるＡ−Ａ断面を示す図５に示されるように、一対の駆動アーム６，６が駆動アーム支持用中央隔壁４を間に挟む状態に配置されていて、一本の支持軸８が、駆動アーム支持用中央隔壁４に形成された支持孔７と各駆動アーム６，６に形成された回動軸孔９とにまたがって差し込まれている。  A pair of drive arms 6 and 6 are rotatably supported at the position of the diameter of the distal end portion of the distal end body 2 whose cross-sectional shape is a perfect circle, as shown in FIG. A plate-shaped drive arm supporting central partition wall 4 having a constant thickness is formed so as to protrude forward. As shown in FIG. 5 showing the AA cross section in FIG. 2, the pair of drive arms 6 and 6 are arranged with the drive arm supporting central partition wall 4 interposed therebetween, and a single support shaft is provided. 8 is inserted across the support hole 7 formed in the drive arm support central partition wall 4 and the rotation shaft hole 9 formed in each drive arm 6, 6.

支持軸８は、径の大きな頭部８ａを有する円柱体であり、その他端側８ｂが止め輪１０に差し込まれて外側からカシメ加工により広げられて軸方向に移動できないようになっている。一対の駆動アーム６，６は、支持軸８に対して軸方向には移動できないが軸周りには自由に回動できる状態に係合している。したがって、図１に示されるように、一対の鉗子片５，５が支持軸８を中心に前方に向かって自由に開閉動作することができる。  The support shaft 8 is a cylindrical body having a head portion 8a having a large diameter, and the other end side 8b is inserted into the retaining ring 10 and widened by caulking from the outside so that it cannot move in the axial direction. The pair of drive arms 6 and 6 are engaged with the support shaft 8 so as not to move in the axial direction but to freely rotate around the shaft. Therefore, as shown in FIG. 1, the pair of forceps pieces 5, 5 can freely open and close around the support shaft 8 toward the front.

可撓性シース１内に軸方向に進退自在に挿通されたステンレス鋼撚り線からなる一対の操作ワイヤー１１，１１の先端には金属製の留め金１３が固着されていて、各駆動アーム６の後端付近に形成された連結孔１２に留め金１３が軸周りに回転自在に係合している。ただし、図２におけるＢ−Ｂ断面を示す図６に示されるように、連結孔１２に差し込まれた軸部とそれより大きな頭部とからなる留め金１３の他端側１３ａがカシメ加工により広げられている。その結果、留め金１３は連結孔１２に対して軸方向には移動できないので、仮に図７に示されるように操作ワイヤー１１が切断したような場合でも、留め金１３が体内に落下せず駆動アーム６に係合した状態が維持されるので安全性が高い。  A metal clasp 13 is fixed to the distal ends of a pair of operation wires 11 and 11 made of stainless steel stranded wire that is inserted into the flexible sheath 1 so as to be movable back and forth in the axial direction. A clasp 13 is engaged with a connecting hole 12 formed near the rear end so as to be rotatable about an axis. However, as shown in FIG. 6 showing a BB cross section in FIG. 2, the other end side 13a of the clasp 13 including the shaft portion inserted into the connecting hole 12 and a larger head portion is widened by caulking. It has been. As a result, since the clasp 13 cannot move in the axial direction with respect to the connecting hole 12, even if the operation wire 11 is cut as shown in FIG. 7, the clasp 13 does not fall into the body and is driven. Since the state engaged with the arm 6 is maintained, safety is high.

可撓性シース１の手元側端部には操作部（図示せず）が連結されていて、操作ワイヤー１１が遠隔操作により押し引き操作され、それによって一対の駆動アーム６，６が各々支持軸８を中心にして回動するが、先端本体２はそのような駆動アーム６，６の動作範囲と干渉しないよう側壁が切り削がれた形状に形成されている。各図において１４がその切り削ぎ部であり、駆動アーム支持用中央隔壁４の壁面と段差のない同一面に形成されている。  An operating portion (not shown) is connected to the proximal end of the flexible sheath 1, and the operation wire 11 is pushed and pulled by remote operation, whereby the pair of drive arms 6 and 6 are respectively supported by the support shafts. The tip body 2 is formed in a shape in which the side wall is cut so as not to interfere with the operation range of the drive arms 6 and 6. In each drawing, reference numeral 14 denotes a cut-off portion, which is formed on the same surface with no step with the wall surface of the drive arm supporting central partition wall 4.

そのような切り削ぎ部１４の縁部である切り削ぎ縁１５は、一対の鉗子片５，５が閉じた図２に示される状態の時に駆動アーム６，６の辺部と平行になるように先端本体２の軸方向に対して斜め向きに形成されている。そのような切り削ぎ部１４と切り削ぎ縁１５は駆動アーム支持用中央隔壁４の両面側に形成されており、図４に破線で示されるように、切り削ぎ縁１５の向きは表側と裏側とで１８０°ひっくり返った向きになっている。切り削ぎ縁１５の先端側の端部は、鉗子片５，５の最大開き角を規制するための開きストッパー１６になっていて、図１に示されるように駆動アーム６の背部が開きストッパー１６に当接することにより、鉗子片５，５がそれ以上開くことができなくなる。  The cutting edge 15 which is the edge of such a cutting part 14 is parallel to the sides of the drive arms 6 and 6 when the pair of forceps pieces 5 and 5 are in the state shown in FIG. The tip body 2 is formed obliquely with respect to the axial direction. Such a cut portion 14 and a cut edge 15 are formed on both sides of the drive arm supporting central partition wall 4, and as shown by a broken line in FIG. 4, the direction of the cut edge 15 is the front side and the back side. It is turned 180 °. The end on the distal end side of the cutting edge 15 is an opening stopper 16 for restricting the maximum opening angle of the forceps pieces 5, 5, and the back portion of the driving arm 6 is opened and stopped as shown in FIG. The forceps pieces 5 and 5 cannot be opened any more.

各操作ワイヤー１１，１１の先端は先端本体２の外部で駆動アーム６に連結されており、切り削ぎ部１４には、操作ワイヤー１１，１１を可撓性シース１内から先端本体２外に引き出すためのワイヤー通過孔１７が開口形成されている。ワイヤー通過孔１７は、図１に示されるように、先端本体２に形成された中空孔３が斜面である切り削ぎ縁１５部分を破る形で形成されると共に、図４に示されるように、先端本体２の外周側から形成された切削孔１８が切り削ぎ部１４を破る形で全体として一つながりに形成されている。  The distal ends of the operation wires 11 and 11 are connected to the drive arm 6 outside the distal end body 2, and the operation wires 11 and 11 are pulled out from the flexible sheath 1 to the outside of the distal end body 2 at the cutting portion 14. A wire passage hole 17 for opening is formed. As shown in FIG. 1, the wire passage hole 17 is formed so that the hollow hole 3 formed in the tip body 2 breaks the cutting edge 15 portion which is a slope, and as shown in FIG. 4, The cutting holes 18 formed from the outer peripheral side of the tip main body 2 are integrally formed so as to break the cutting portion 14.

このように構成された実施例の内視鏡用鉗子は、操作ワイヤー１１，１１を手元側から押し引き操作することにより一対の駆動アーム６，６が支持軸８を中心に回動し、各駆動アーム６，６と一体に形成された鉗子片５，５が支持軸８を中心に前方に向かって開閉動作をする。そして、一対の鉗子片５，５を支持する駆動アーム支持用中央隔壁４は先端本休２の先端部分の直径位置に形成されていて、従来のスリットの両側壁に比べて２倍の厚みを直径の長さに確保することができるので、強度が格段に大きくて変形し難く、しかも多少変形したとしても駆動アーム６の回動動作を妨げないので鉗子片５，５が常に良好に開閉作動することができ、後述する第３の実施例のように駆動アーム支持用中央隔壁４を電気絶縁性の非金属材で形成しても充分な強度と作動性を得ることができる。  In the endoscopic forceps of the embodiment configured as described above, the pair of drive arms 6 and 6 are rotated about the support shaft 8 by pushing and pulling the operation wires 11 and 11 from the hand side. The forceps pieces 5, 5 formed integrally with the drive arms 6, 6 open and close with the support shaft 8 as the center. The drive arm supporting central partition wall 4 for supporting the pair of forceps pieces 5 and 5 is formed at the diameter position of the distal end portion of the distal end main holiday 2, and is twice as thick as both side walls of the conventional slit. Since the length of the diameter can be ensured, the forceps pieces 5 and 5 are always opened and closed properly, since the strength is remarkably large and hardly deformed, and even if it is slightly deformed, the rotation of the drive arm 6 is not hindered. Even when the drive arm supporting central partition wall 4 is formed of an electrically insulating non-metallic material as in the third embodiment to be described later, sufficient strength and operability can be obtained.

図８は、いわゆるモノポーラの高周波処置具として用いることができる第２の実施例の内視鏡用鉗子の先端部を示している。この実施例においては、可撓性シース１の外面に電気絶縁チューブ２０が被覆されて、導電性の操作ワイヤー１１が高周波電源２１の正極端子に接続され、操作ワイヤー１１を経由して一対の鉗子片５，５に高周波電流を通電することができる。可撓性シース１が電気絶縁性のものであれば電気絶縁チューブ２０は不要である。高周波電源２１の負極端子には患者の体表面に接触させる対極板２２が接続されている。このように構成された実施例の内視鏡用鉗子の先端部では、一対の鉗子片５，５をモノポーラの高周波電極としてホットバイオプシーや止血その他の高周波処置を行うことができる。  FIG. 8 shows a distal end portion of an endoscopic forceps of a second embodiment that can be used as a so-called monopolar high-frequency treatment instrument. In this embodiment, the outer surface of the flexible sheath 1 is covered with an electrical insulating tube 20, and the conductive operation wire 11 is connected to the positive terminal of the high-frequency power source 21, and a pair of forceps via the operation wire 11. High frequency current can be applied to the pieces 5 and 5. If the flexible sheath 1 is electrically insulating, the electrically insulating tube 20 is unnecessary. The negative electrode terminal of the high frequency power supply 21 is connected to a counter electrode plate 22 that is brought into contact with the patient's body surface. At the distal end portion of the endoscopic forceps of the embodiment configured as described above, hot biopsy, hemostasis, and other high-frequency treatments can be performed using the pair of forceps pieces 5 and 5 as monopolar high-frequency electrodes.

図９、図１０及び図１１は、一対の鉗子片５，５を正電極と負電極にしたいわゆるバイポーラの高周波処置具として用いることができる第３の実施例の内視鏡用鉗子の先端部を示している。図９は側面断面図、図１０は平面部分断面図、図１１はＣ−Ｃ線で切断した断面図である。この実施例においては、先端本体２と支持軸８が共に例えばフッ素樹脂、ポロフェニレンサルファイド樹脂、ポリイミド樹脂又はエポキシ樹脂等のような電気絶縁性の材料で形成されて二つの鉗子片５，５の間が電気絶縁されると共に、各操作ワイヤー１１に絶縁被覆２４が施されて、可撓性シース１の外面には電気絶縁チューブ２０が被覆されている。ただし、操作ワイヤー１１の一方だけに絶縁被覆２４を施してもよく、先端本体２と支持軸８は必ずしも全体を電気絶縁材で形成しなくてもよい。  FIGS. 9, 10 and 11 show the distal end portion of the forceps for endoscope of the third embodiment which can be used as a so-called bipolar high-frequency treatment instrument in which a pair of forceps pieces 5 and 5 is a positive electrode and a negative electrode. Is shown. 9 is a side sectional view, FIG. 10 is a plan partial sectional view, and FIG. 11 is a sectional view taken along line CC. In this embodiment, both the tip body 2 and the support shaft 8 are formed of an electrically insulating material such as a fluororesin, a polyphenylene sulfide resin, a polyimide resin or an epoxy resin, and the two forceps pieces 5 and 5 are formed. The insulating sheath 24 is applied to each operation wire 11 and the outer surface of the flexible sheath 1 is covered with an electrically insulating tube 20. However, the insulation coating 24 may be applied to only one of the operation wires 11, and the tip main body 2 and the support shaft 8 do not necessarily need to be entirely formed of an electrical insulating material.

このように構成された実施例の内視鏡用鉗子の先端部においては、一対の鉗子片５，５と個別に独立して電気的につながっている一対の操作ワイヤー１１，１１を高周波電源２１の正極端子と負極端子とに接続して、一対の鉗子片５，５の間に挟まれる生体組織に高周波電流を流し、極めて簡単な構成でしかも優れた強度と耐久性を有する構造のバイポーラ高周波処置具を実現することができ、図１０及び図１１に示されるように、一対の鉗子片５，５を駆動アーム支持用中央隔壁４によって確実に電気的に分離することができるので電気安全性が高い。  At the distal end portion of the endoscopic forceps of the embodiment configured as described above, a pair of operation wires 11 and 11 electrically connected to the pair of forceps pieces 5 and 5 individually and independently are connected to the high frequency power source 21. The bipolar high frequency current is connected to the positive electrode terminal and the negative electrode terminal, and a high-frequency current is passed through the living tissue sandwiched between the pair of forceps pieces 5 and 5, so that it has a very simple structure and has excellent strength and durability. A treatment instrument can be realized, and as shown in FIGS. 10 and 11, the pair of forceps pieces 5 and 5 can be reliably electrically separated by the drive arm supporting central partition wall 4, so that electrical safety is achieved. Is expensive.

また、図１２に示されるように、一対の操作ワイヤー１１，１１の中の一方だけを高周波電源２１の正極端子（又は負極端子）に接続することにより、一方の鉗子片５をモノポーラの高周波電極とする使い方が可能であり、そのようにすることにより、体内組織の焼灼部位が鉗子片５に焦げ付いてしまう現象を緩和することができる。  12, only one of the pair of operation wires 11, 11 is connected to the positive terminal (or the negative terminal) of the high-frequency power source 21, so that one of the forceps pieces 5 is a monopolar high-frequency electrode. It is possible to alleviate the phenomenon that the cauterized part of the body tissue burns into the forceps piece 5 by doing so.

本発明の第１の実施例の内視鏡用鉗子の先端部の開状態の側面断面図。The side sectional view of the open state of the front-end | tip part of the forceps for endoscopes of 1st Example of this invention. 本発明の第１の実施例の内視鏡用鉗子の先端部の閉状態の側面図。The side view of the closed state of the front-end | tip part of the forceps for endoscopes of 1st Example of this invention. 本発明の第１の実施例の内視鏡用鉗子の先端部の平面部分断面図。The plane fragmentary sectional view of the front-end | tip part of the forceps for endoscopes of 1st Example of this invention. 本発明の第１の実施例の内視鏡用鉗子の先端本体の斜視図。The perspective view of the front-end | tip main body of the forceps for endoscopes of the 1st Example of this invention. 本発明の第１の実施例の内視鏡用鉗子の図２におけるＡ−Ａ線で切断した断面図。Sectional drawing cut | disconnected by the AA in FIG. 2 of the forceps for endoscopes of 1st Example of this invention. 本発明の第１の実施例の内視鏡用鉗子の図２におけるＢ−Ｂ線で切断した断面図。Sectional drawing cut | disconnected by the BB line in FIG. 2 of the forceps for endoscopes of 1st Example of this invention. 本発明の第１の実施例の内視鏡用鉗子の操作ワイヤーが先端付近で切断した状態の図２におけるＢ−Ｂ線で切断した断面図。Sectional drawing cut | disconnected by the BB line | wire in FIG. 2 of the state which the operation wire of the forceps for endoscopes of 1st Example of this invention cut | disconnected near the front-end | tip. 本発明の第２の実施例の内視鏡用鉗子の先端部の側面断面図。Side surface sectional drawing of the front-end | tip part of the forceps for endoscopes of the 2nd Example of this invention. 本発明の第３の実施例の内視鏡用鉗子の先端部の側面断面図。Side surface sectional drawing of the front-end | tip part of the forceps for endoscopes of the 3rd Example of this invention. 本発明の第３の実施例の内視鏡用鉗子の先端部の平面部分断面図。The plane fragmentary sectional view of the front-end | tip part of the forceps for endoscopes of the 3rd Example of this invention. 本発明の第３の実施例の内視鏡用鉗子の図１０におけるＣ−Ｃ線で切断した断面図。Sectional drawing cut | disconnected by CC line in FIG. 10 of the forceps for endoscopes of the 3rd Example of this invention. 本発明の第３の実施例の内視鏡用鉗子の先端部の異なる使用態様の側面断面図。Side surface sectional drawing of the usage condition from which the front-end | tip part of the forceps for endoscopes of the 3rd Example of this invention differs. 従来の内視鏡用鉗子の先端本体の斜視図。The perspective view of the front-end | tip main body of the forceps for conventional endoscopes.

符号の説明Explanation of symbols

１…可撓性シース
２…先端本体
４…駆動アーム支持用中央隔壁
５…鉗子片
６…駆動アーム
７…支持孔
８…支持軸
１１…操作ワイヤー
１４…切り削ぎ部
１５…切り削ぎ縁
１６…開きストッパー
１７…ワイヤー通過孔
２０…電気絶縁チューブ
２１…高周波電源
２４…絶縁被覆DESCRIPTION OF SYMBOLS 1 ... Flexible sheath 2 ... Tip body 4 ... Central partition 5 for drive arm support ... Forceps piece 6 ... Drive arm 7 ... Support hole 8 ... Support shaft 11 ... Operation wire 14 ... Cutting part 15 ... Cutting edge 16 ... Opening stopper 17 ... Wire passage hole 20 ... Electrically insulating tube 21 ... High frequency power supply 24 ... Insulating coating

Claims (2)

内視鏡の処置具案内管路に挿脱自在な可撓性シースの先端に設けられた先端本体と、前記先端本体の先端部分に前方に向かって開閉できるように並列に並んで回動自在に配置された一対の鉗子片と、前記一対の鉗子片を回動駆動するために前記一対の鉗子片の各々から後方に突出形成された一対の駆動アームと、前記可撓性シースの後端側からの遠隔操作により前記一対の駆動アームを動作させて前記一対の鉗子片を開閉駆動するように前記可撓性シース内に挿通された操作ワイヤーとが設けられた内視鏡用鉗子の先端部において、
前記一対の駆動アームの間に挟まれる状態に前記先端本体から前方に向かって突出形成される駆動アーム支持用中央隔壁に対して前記一対の駆動アームが各々回動自在に支持され、
前記先端本体の側壁が前記駆動アームの動作範囲と干渉する部分を切り削いだ形状に形成され、該切り削いだ形状に形成された部分が前記駆動アーム支持用中央隔壁と同一面に形成され、
前記先端本体の側壁の切り削いだ形状に形成された部分の縁部が前記先端本体の軸方向に対して斜め向きに形成され、
前記操作ワイヤーを前記可撓性シース内から前記先端本体外に引き出すためのワイヤー通過孔が、前記先端本体の側壁の切り削いだ形状に形成された部分の前記駆動アーム支持用中央隔壁と同一面に形成された部分と前記先端本体の軸方向に対して斜め向きに形成された縁部とにまたがって開口形成され、前記操作ワイヤーの先端が前記先端本体外において前記各駆動アームに連結されることを特徴とする内視鏡用鉗子の先端部。
A distal end body provided at the distal end of a flexible sheath that can be inserted into and removed from a treatment instrument guide conduit of an endoscope, and can be pivoted side by side in parallel so that the distal end portion of the distal end body can be opened and closed forward. A pair of forceps pieces arranged in a pair, a pair of drive arms formed to project rearward from each of the pair of forceps pieces for rotationally driving the pair of forceps pieces, and a rear end of the flexible sheath The distal end of an endoscopic forceps provided with an operation wire inserted into the flexible sheath so as to open and drive the pair of forceps pieces by operating the pair of drive arms by remote operation from the side In the department,
The pair of drive arms are respectively supported rotatably with respect to a central partition for driving arm support formed to protrude forward from the tip main body in a state of being sandwiched between the pair of drive arms,
The side wall of the tip body is formed in a shape that cuts out a portion that interferes with the operating range of the drive arm, and the portion that is formed in the cut shape is formed on the same surface as the central partition for supporting the drive arm,
The edge of the portion formed in the cut shape of the side wall of the tip body is formed obliquely with respect to the axial direction of the tip body,
A wire passage hole for drawing out the operation wire from the flexible sheath to the outside of the distal end main body is flush with the central partition wall for supporting the drive arm of the portion formed by cutting the side wall of the distal end main body. And an opening formed across the edge formed obliquely with respect to the axial direction of the tip body, and the tip of the operation wire is connected to the drive arms outside the tip body. The tip part of the forceps for endoscopes characterized by the above-mentioned.
請求項１に記載された内視鏡用鉗子の先端部において、前記先端本体には後端側から前記可撓性シースの先端部分が差し込まれるための中空孔が形成されるとともに外周側から切削孔が形成され、
前記ワイヤー通過孔は、前記中空孔が前記先端本体の側壁の切り削いだ形状に形成された部分の縁部を破る形で形成されると共に前記切削孔が前記先端本体の側壁の切り削いだ形状に形成された部分を破る形で全体として一つながりに形成されていることを特徴とする内視鏡用鉗子の先端部。 The distal end portion of the forceps for endoscope according to claim 1, wherein a hollow hole is formed in the distal end body for inserting the distal end portion of the flexible sheath from the rear end side, and cutting is performed from the outer peripheral side. Holes are formed,
The wire passing hole is formed so as to break the edge of the portion where the hollow hole is formed by cutting the side wall of the tip body, and the cutting hole is formed by cutting the side wall of the tip body. tip of the forceps for endoscopic you characterized in that it is formed as a whole a stretch in a way to break portion formed.
JP2005188918A 2005-06-01 2005-06-01 End of the forceps for endoscope Active JP4423474B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005188918A JP4423474B2 (en) 2005-06-01 2005-06-01 End of the forceps for endoscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005188918A JP4423474B2 (en) 2005-06-01 2005-06-01 End of the forceps for endoscope

Publications (2)

Publication Number Publication Date
JP2006334348A JP2006334348A (en) 2006-12-14
JP4423474B2 true JP4423474B2 (en) 2010-03-03

Family

ID=37555384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005188918A Active JP4423474B2 (en) 2005-06-01 2005-06-01 End of the forceps for endoscope

Country Status (1)

Country Link
JP (1) JP4423474B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040260337A1 (en) 2003-06-18 2004-12-23 Scimed Life Systems, Inc. Endoscopic instruments and methods of manufacture
US7762960B2 (en) 2005-05-13 2010-07-27 Boston Scientific Scimed, Inc. Biopsy forceps assemblies
JP2009153535A (en) * 2007-12-25 2009-07-16 Hoya Corp Beak-shaped treatment instrument for endoscope
JP2010142279A (en) * 2008-12-16 2010-07-01 Olympus Medical Systems Corp Treatment instrument
JP6329751B2 (en) * 2013-11-01 2018-05-23 セイコーインスツル株式会社 Biostimulation electrode, biostimulation electrode device, and biostimulation electrode generation method
JP7175396B2 (en) * 2019-07-08 2022-11-18 オリンパス株式会社 Endoscopic treatment tool

Also Published As

Publication number Publication date
JP2006334348A (en) 2006-12-14

Similar Documents

Publication Publication Date Title
JP5017549B2 (en) Endoscopic high-frequency incision tool
JP4131011B2 (en) Endoscopic sputum treatment device
JP4295925B2 (en) Bipolar high-frequency treatment instrument for endoscope
JP3934458B2 (en) Bipolar high-frequency hemostatic forceps for endoscope
JP4420593B2 (en) Bipolar high-frequency treatment instrument for endoscope
US8025630B2 (en) Treatment apparatus
US20080294159A1 (en) High frequency surgical instrument
JP2004229976A (en) Forceps type electrical operative instrument
JP4423474B2 (en) End of the forceps for endoscope
EP1688099B1 (en) Endoscopic high-frequency knife
JP3615960B2 (en) Endoscopic biopsy forceps with needle
JP4461206B2 (en) Endoscopic high-frequency incision tool
JP4555996B2 (en) Endoscopic high-frequency incision tool
JP4543017B2 (en) Endoscopic high-frequency incision tool
JP3989784B2 (en) Endoscopic sputum treatment device
JP2003299668A (en) Bipolar-type high frequency treatment tool for endoscope
JP4476229B2 (en) Bipolar saddle-shaped high-frequency treatment instrument for endoscope
JP2002282265A (en) Forceps for endoscope
JP2007282847A (en) Flexible bipolar forceps
JP2008295905A (en) Monopolar type high frequency knife for endoscope
JP2018099401A (en) Medical high frequency treatment tool
JP2009207666A (en) Bipolar type high frequency incision device for endoscope
JP3934459B2 (en) Endoscopic sputum treatment device
JP2009022623A (en) Bipolar high-frequency treating instrument for endoscope
JP4130942B2 (en) Bipolar high-frequency treatment instrument for endoscope

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080306

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20090625

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090707

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20090729

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20090827

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20091110

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20091119

R150 Certificate of patent or registration of utility model

Ref document number: 4423474

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121218

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121218

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121218

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20151218

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313114

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313114

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

R371 Transfer withdrawn

Free format text: JAPANESE INTERMEDIATE CODE: R371

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250