JP2012019846A - High frequency hemostatic forceps for endoscope - Google Patents

High frequency hemostatic forceps for endoscope Download PDF

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JP2012019846A
JP2012019846A JP2010158346A JP2010158346A JP2012019846A JP 2012019846 A JP2012019846 A JP 2012019846A JP 2010158346 A JP2010158346 A JP 2010158346A JP 2010158346 A JP2010158346 A JP 2010158346A JP 2012019846 A JP2012019846 A JP 2012019846A
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insulating coating
forceps
frequency
electrically insulating
cup
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Miyuki Nishimura
幸 西村
Yoshihito Momose
良仁 百瀬
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River Seiko Co Ltd
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River Seiko Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide high frequency hemostatic forceps for endoscope which prevents bleeding on removing an electrode from living tissue.SOLUTION: In the high frequency hemostatic forceps for endoscope including a conductive metal wherein a pair of forceps cups 100 with bottom parts to function as high frequency electrodes for flowing high frequency current to living tissue are closably configured, an electric insulation coated portion 102 not to flow high frequency current and a non-electric insulation coated part 101 to flow the high frequency current are configured crossing on the contact portion in the forceps cups 100 to touch the living tissue, and the area ratio between the electric insulation coated portion and the non-electric insulation coated part is set within 1:4 to 3:4.

Description

本発明は、生体組織を挟み込んだ一対の高周波電極に高周波電流を通電して生体組織を焼灼・凝固する内視鏡用高周波止血鉗子に係り、特に高周波電極を開く際の生体組織からの出血を防止することができる内視鏡用高周波止血鉗子に関する。   The present invention relates to a high-frequency hemostatic forceps for an endoscope that energizes and coagulates a living tissue by applying a high-frequency current to a pair of high-frequency electrodes sandwiching the living tissue, and in particular, bleeding from the living tissue when the high-frequency electrode is opened. The present invention relates to a high-frequency hemostatic forceps for an endoscope that can be prevented.

一般に内視鏡用高周波止血鉗子は、内面に高周波電極が配されたカップ形状の鉗子により生体組織を挟み込み、前記高周波電極に高周波電流を通電することによって生体組織を焼灼・凝固するものであり、生体組織に触れる高周波電極の面積を少なくすることにより、生体組織に深い火傷を広範囲に作って無用の組織破壊を生じることを防止するため、鉗子カップの閉じ方向面の外縁部のみに導電性金属を露出させ、それ以外の部分全体に電気絶縁性コーティングを施した鉗子型の高周波処置具が提案されている。   In general, a high-frequency hemostatic forceps for an endoscope is a method in which a living tissue is sandwiched by a cup-shaped forceps in which a high-frequency electrode is arranged on an inner surface, and the high-frequency electrode is energized with a high-frequency current to cauterize and coagulate the living tissue. By reducing the area of the high-frequency electrode that touches the living tissue, a conductive metal is applied only to the outer edge of the forceps cup in order to prevent unnecessary tissue destruction by creating deep burns in the living tissue over a wide area. A forceps-type high-frequency treatment instrument has been proposed in which a wire is exposed and an electrically insulating coating is applied to the entire other part.

また、生体組織へ深い火傷を広範囲に作って無用の組織破壊を生じることを防止する内視鏡用高周波止血鉗子として、下記の特許文献1に記載されるように、一対のカップ状鉗子片の対向する閉じ方向面の少なくとも一方に複数の鋸歯状凹凸を形成すると共に、この鋸歯状凹凸の底部に電気絶縁性コーティングを施し、頂部に導電性を設ける技術がある。   In addition, as described in Patent Document 1 below, as a high-frequency hemostatic forceps for an endoscope that prevents the generation of unnecessary tissue destruction by creating deep burns in a wide range of living tissue, a pair of cup-shaped forceps pieces is used. There is a technique in which a plurality of serrated irregularities are formed on at least one of the opposing closing direction surfaces, an electrically insulating coating is applied to the bottom of the serrated irregularities, and conductivity is provided on the top.

特開2009−297503号公報JP 2009-297503 A

前記特許文献1に記載された技術は、一対のカップ状鉗子片の内面に高周波電極を露出させて生体組織を挟持したときに止血を行うことができるものの、カップ状鉗子片内面の電極に生体組織の粘膜が焦げ付きによって、止血施術終了後に一対のカップ状鉗子片を開く際に前記粘膜に焼き付いてしまった密着部分が生体組織から剥がされ、再度の出血を招く可能性があるという課題があった。この課題は、棒状の高周波電極により血管を止血する内視鏡用高周波止血鉗子においても同様である。   Although the technique described in Patent Document 1 can perform hemostasis when a high-frequency electrode is exposed on the inner surface of a pair of cup-shaped forceps pieces and a living tissue is sandwiched between them, a living body is applied to the electrode on the inner surface of the cup-shaped forceps piece. The tissue mucous membrane is scorched, so that when the pair of cup-shaped forceps pieces are opened after the hemostasis operation is completed, the adherent part that has burned into the mucous membrane may be peeled off from the living tissue and may cause another bleeding. It was. This problem also applies to the endoscopic high-frequency hemostatic forceps for hemostasis of blood vessels with rod-shaped high-frequency electrodes.

本発明の目的は、前述の従来技術による課題を解決することであり、止血施術終了後に鉗子片を開いた際にも生体組織からの出血を防止することができる内視鏡用高周波止血鉗子を提供することである。   An object of the present invention is to solve the above-described problems of the prior art, and to provide a high-frequency hemostatic forceps for endoscope that can prevent bleeding from living tissue even when the forceps piece is opened after the hemostasis operation is completed. Is to provide.

前記目的を達成するために本発明は、導電性金属からなり生体組織に高周波電流を通電する高周波電極として機能する凹状底部を有するカップ状鉗子片の一対を開閉自在に構成した内視鏡用高周波止血鉗子において、
前記カップ状鉗子片の生体組織に接する接触部の底部に、前記高周波電流を通電しない電気絶縁性コーティング部と、前記高周波電流を通電し、高周波電極として機能する非電気絶縁性コーティング部とが分断して構成されていることを第1の特徴とする。
In order to achieve the above object, the present invention provides a high-frequency endoscope for use in which a pair of cup-shaped forceps pieces made of a conductive metal and having a concave bottom portion functioning as a high-frequency electrode for supplying a high-frequency current to a living tissue can be opened and closed. In hemostatic forceps,
The bottom part of the contact part of the cup-shaped forceps piece that contacts the living tissue is divided into an electrically insulating coating part that does not pass the high-frequency current and a non-electrical insulating coating part that passes the high-frequency current and functions as a high-frequency electrode. The first feature is that it is configured as described above.

また、本発明は、前記第1の特徴の内視鏡用高周波止血鉗子において、前記電気絶縁性コーティング部と非電気絶縁性コーティング部との面積比が1対4から3対4の範囲に設定されていることを第2の特徴とする。   Further, according to the present invention, in the high-frequency hemostatic forceps for endoscope according to the first feature, the area ratio between the electrically insulating coating portion and the non-electrically insulating coating portion is set in a range of 1: 4 to 3: 4. This is the second feature.

また、本発明は、前記第1又は第2の特徴の内視鏡用高周波止血鉗子において、前記カップ状鉗子片が長円状の開口部を有し、前記非電気絶縁性コーティング部が前記長円状開口部内の底部を十字に横断する形状に構成されていることを第3の特徴とする。   Further, according to the present invention, in the high-frequency hemostatic forceps for endoscope according to the first or second feature, the cup-shaped forceps piece has an oval opening, and the non-electrically insulating coating portion is the long A third feature is that the bottom of the circular opening is configured to cross the cross.

また、本発明は、前記第1又は第2の特徴の内視鏡用高周波止血鉗子において、前記カップ状鉗子片が長円状の開口部を有し、前記電気絶縁性コーティング部が前記長円状開口部内の底部を十字に横断する形状に構成されていることを第4の特徴とする。   Further, the present invention is the endoscope high-frequency hemostatic forceps according to the first or second feature, wherein the cup-shaped forceps piece has an oval opening, and the electrically insulating coating portion is the oval. The fourth feature is that the bottom of the opening is crossed in a cross shape.

また、本発明は、前記第1又は第2の特徴の内視鏡用高周波止血鉗子において、前記カップ状鉗子片が、長円状の開口部を有し、前記電気絶縁性コーティング部が前記長円状開口部内の底部を格子状に横断する形状に構成されていることを第5の特徴とする。   Further, according to the present invention, in the high-frequency hemostatic forceps for endoscope according to the first or second feature, the cup-shaped forceps piece has an oval opening, and the electrically insulating coating portion is the long A fifth feature is that the circular opening is configured to cross the bottom in a lattice shape.

また、本発明は、前記第1又は第2の特徴の内視鏡用高周波止血鉗子において、前記カップ状鉗子片が、長円状の開口部を有し、前記非電気絶縁性コーティング部が前記長円状開口部内の底部を格子状に横断する形状に構成されていることを第6の特徴とする。   Further, in the high-frequency hemostatic forceps for endoscope according to the first or second feature of the present invention, the cup-shaped forceps piece has an oval opening, and the non-electrically insulating coating portion is the A sixth feature is that the base is formed in a shape that crosses the bottom of the oval opening in a lattice pattern.

また、本発明は、前記第1又は第2の特徴の内視鏡用高周波止血鉗子において、前記カップ状鉗子片が、長円状の開口部を有し、前記電気絶縁性コーティング部が前記長円状開口部内の底部を同心の複数トラック形状に構成されていることを第7の特徴とする。   Further, according to the present invention, in the high-frequency hemostatic forceps for endoscope according to the first or second feature, the cup-shaped forceps piece has an oval opening, and the electrically insulating coating portion is the long A seventh feature is that the bottom of the circular opening is formed in a concentric multiple track shape.

また、本発明は、前記第7の特徴の内視鏡用高周波止血鉗子において、前記複数トラック形状に構成された電気絶縁性コーティング部が円周方向に分断されていることを第8の特徴とする。   Further, according to the eighth feature of the present invention, in the high-frequency hemostatic forceps for endoscope according to the seventh feature, the electrically insulating coating portion configured in the plurality of tracks is divided in the circumferential direction. To do.

また、本発明は、前記第1又は第2の特徴の内視鏡用高周波止血鉗子において、前記カップ状鉗子片が、長円状の開口部を有し、前記電気絶縁性コーティング部が前記長円状開口部内の底部を横断する複数の線状に構成されていることを第9の特徴とする。   Further, according to the present invention, in the high-frequency hemostatic forceps for endoscope according to the first or second feature, the cup-shaped forceps piece has an oval opening, and the electrically insulating coating portion is the long A ninth feature is that the circular opening is formed in a plurality of lines that cross the bottom.

また、本発明は、前記第1又は第2の特徴の内視鏡用高周波止血鉗子において、前記カップ状鉗子片が、長円状の開口部を有し、前記非電気絶縁性コーティング部が前記長円状開口部内の底部内に位置する複数の円状に構成されていることを第10の特徴とする。   Further, in the high-frequency hemostatic forceps for endoscope according to the first or second feature of the present invention, the cup-shaped forceps piece has an oval opening, and the non-electrically insulating coating portion is the A tenth feature is that the oval opening is formed in a plurality of circular shapes located in the bottom of the opening.

また、本発明は、前記何れかの特徴の内視鏡用高周波止血鉗子において、前記一対のカップ状鉗子片の底部に構成された電気絶縁性コーティング部と非電気絶縁性コーティング部の配置が異なるように構成されていることを第11の特徴とする。   Further, according to the present invention, in the endoscopic high-frequency hemostatic forceps having any one of the characteristics described above, the arrangement of the electrically insulating coating portion and the non-electrically insulating coating portion formed at the bottom of the pair of cup-shaped forceps pieces is different. This is an eleventh feature.

更に、本発明は、導電性金属からなり生体組織に高周波電流を通電する高周波電極として機能する一対の棒状の棒状鉗子片を開閉自在に構成した内視鏡用高周波止血鉗子において、
前記棒状鉗子片の生体組織に接する接触部に、前記高周波電流を通電しない電気絶縁性コーティング部と、前記高周波電流を通電する非電気絶縁性コーティング部とが、棒状の長さ方向に沿って分断されていることを第12の特徴とする。
Furthermore, the present invention relates to a high-frequency hemostatic forceps for an endoscope that is configured to be capable of opening and closing a pair of rod-shaped forceps pieces made of a conductive metal and functioning as a high-frequency electrode that supplies a high-frequency current to a living tissue.
An electrical insulating coating portion that does not pass the high-frequency current and a non-electrical insulating coating portion that passes the high-frequency current are divided along the rod-shaped length direction at the contact portion of the rod-shaped forceps piece that contacts the living tissue. This is a twelfth feature.

本発明による内視鏡用高周波止血鉗子は、鉗子片の生体組織に接する接触部の底部に、前記高周波電流を通電しない電気絶縁性コーティング部と、前記高周波電流を通電する非電気絶縁性コーティング部とが分断して構成され、生体組織に高周波電流を印可して焼灼・凝固する部分を生体組織表面に分散させ、高周波電極と生体組織が焦げ付きによる密着部分を減少させることによって、高周波電極の鉗子を生体組織に対して開く際の出血を防止することができる。   The high-frequency hemostatic forceps for endoscope according to the present invention includes an electrically insulating coating portion that does not pass the high-frequency current and a non-electrically-insulating coating portion that passes the high-frequency current at the bottom of the contact portion that contacts the living tissue of the forceps piece. The high-frequency electrode forceps are formed by dividing the portion of the living tissue that is cauterized and coagulated by applying a high-frequency current to the living tissue, and reducing the contact portion due to scorching between the high-frequency electrode and the living tissue. Bleeding can be prevented when opening the tissue to the living tissue.

本発明の第1の実施形態による内視鏡用高周波止血鉗子の外観斜視図。1 is an external perspective view of a high-frequency hemostatic forceps for endoscope according to a first embodiment of the present invention. 本発明の第1の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by the 1st Embodiment of this invention. 本発明の第2の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by the 2nd Embodiment of this invention. 本発明の第3の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by the 3rd Embodiment of this invention. 本発明の第4の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by the 4th Embodiment of this invention. 本発明の第5の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by the 5th Embodiment of this invention. 本発明の第6の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by the 6th Embodiment of this invention. 本発明の第7の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by the 7th Embodiment of this invention. 本発明の第8の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by the 8th Embodiment of this invention. 本発明の第9の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by the 9th Embodiment of this invention. 本発明の第10の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by the 10th Embodiment of this invention. 本発明の第11の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by the 11th Embodiment of this invention. 本発明の第12の実施形態による内視鏡用高周波止血鉗子の外観斜視図。The external appearance perspective view of the high frequency hemostatic forceps for endoscopes by the 12th Embodiment of this invention. 本発明の第12の実施形態による内視鏡用高周波止血鉗子の外観斜視図。The external appearance perspective view of the high frequency hemostatic forceps for endoscopes by the 12th Embodiment of this invention. 本発明の第13の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by the 13th Embodiment of this invention. 本発明の第14の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by the 14th Embodiment of this invention. 本発明の第15の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by 15th Embodiment of this invention. 本発明の第16の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by 16th Embodiment of this invention. 本発明の第17の実施形態によるカップ状鉗子片を説明するための図。The figure for demonstrating the cup-shaped forceps piece by the 17th Embodiment of this invention.

以下、本発明の複数の実施形態による内視鏡用高周波止血鉗子を図面を参照して説明する。
まず、第1の実施形態による内視鏡用高周波止血鉗子20は、図1に示すように、導電性金属からなり、高周波電極として機能する一対の鉗子カップ(カップ状鉗子片)100と、該鉗子カップ100を開閉する軸となる支軸12と、該支軸12の中間部を支持する支持部を有する支持枠体9と、前記支軸12と間隔を空けて配置される連結軸14と、該連結軸14と回転自在に連結される駆動アーム11と、該駆動アーム11が駆動されることによって一対の鉗子カップ100を開閉するためのリンク機構13と、前記支持枠体9を保持する可撓性シース2とから構成される。この内視鏡用高周波止血鉗子20は、図示しないが、可撓性シース2の手元側の端部(基端部)に操作部が連結されており、操作部を操作して、可撓性シース2内に通された導電性の操作ワイヤーを長手方向に操作者がスライド動作させることによって、鉗子カップ100を開閉し、且つ通電することによって、操作ワイヤーを経由して鉗子カップ100に高周波電流を通電することができる。
Hereinafter, endoscopic high-frequency hemostatic forceps according to a plurality of embodiments of the present invention will be described with reference to the drawings.
First, as shown in FIG. 1, a high-frequency hemostatic forceps 20 for an endoscope according to the first embodiment includes a pair of forceps cups (cup-shaped forceps pieces) 100 made of a conductive metal and functioning as a high-frequency electrode, A support shaft 12 serving as an axis for opening and closing the forceps cup 100, a support frame 9 having a support portion for supporting an intermediate portion of the support shaft 12, and a connecting shaft 14 disposed at a distance from the support shaft 12. A driving arm 11 rotatably connected to the connecting shaft 14, a link mechanism 13 for opening and closing the pair of forceps cups 100 by driving the driving arm 11, and the support frame 9 are held. And a flexible sheath 2. The high-frequency hemostatic forceps 20 for endoscope is not shown, but an operation part is connected to the proximal end part (base end part) of the flexible sheath 2, and the operation part is operated to be flexible. When the operator slides the conductive operation wire passed through the sheath 2 in the longitudinal direction, the forceps cup 100 is opened / closed and energized, whereby a high-frequency current is supplied to the forceps cup 100 via the operation wire. Can be energized.

本実施形態による鉗子カップ100は、内面に生体組織外周部を挟み込んで収納するために生体組織と接触する接触部を構成する凹状(カップ状)の底部を有し、図1及び図2に示すように、前記底部内面に導電性特性を有する十字形状の非電気絶縁性コーティング部101と、該非電気絶縁性コーティング部101の十字形状を除く十字形状中抜きの斜線で示す絶縁性の電気絶縁性コーティング部102と、該鉗子カップ100の開口部縁に設けられた複数の鋸歯状凹凸部15の斜面部に斜線で示す電気絶縁性コーティング部24とが形成され、外周表面側に絶縁性の電気絶縁性コーティング部103他(図中の斜線部分)が施され、前記複数の鋸歯状凹凸部15の頂部は、非電気絶縁性コーティング部16が施されている。前記各電気絶縁性コーティング部は、導電性の鉗子カップ100の全体をフッ素樹脂、セラミック、ポリイド樹脂等の非伝導性材料によってコーティングし、非電気絶縁性コーティング部をレーザビームを用いて蒸散することによって形成することができるが、この形成方法に限られるものではなく、電気絶縁性コーティング部を印刷や他の製法によっても良い。また、鉗子カップ100の底部における非電気絶縁性コーティング部101と電気絶縁性コーティング部102の面積比は、1対4から3対4の範囲が好適である。なお、内視鏡用高周波止血鉗子20は、伝導性のある生体組織を介して高周波電流が通電するため、鋸歯状凹凸部15は、鉗子カップ100を閉じた状態において一方の非電気絶縁性コーティング部16と他方の非電気絶縁性コーティング部16とを対向して配置せずに交互に配置しても良く、これは鉗子カップ底部においても同様である。   The forceps cup 100 according to the present embodiment has a concave (cup-shaped) bottom portion that constitutes a contact portion that comes into contact with a living tissue in order to sandwich and store the outer periphery of the living tissue on the inner surface, and is shown in FIGS. 1 and 2. As described above, the cross-shaped non-electrical insulating coating portion 101 having conductive characteristics on the inner surface of the bottom portion, and the insulating electrical insulating property indicated by the cross-shaped hollow lines excluding the cross-shaped shape of the non-electrical insulating coating portion 101 A coating portion 102 and an electrically insulating coating portion 24 indicated by hatching are formed on the slope portions of the plurality of serrated irregularities 15 provided on the edge of the opening of the forceps cup 100, and an insulating electrical surface is formed on the outer peripheral surface side. The insulating coating portion 103 and the like (the hatched portion in the figure) are applied, and the non-electrically insulating coating portion 16 is applied to the top of the plurality of sawtooth uneven portions 15. Each of the electrically insulating coating portions is formed by coating the entire conductive forceps cup 100 with a nonconductive material such as a fluororesin, a ceramic, or a polyid resin, and evaporating the nonelectrically insulating coating portion using a laser beam. However, the present invention is not limited to this forming method, and the electrically insulating coating portion may be formed by printing or other manufacturing methods. The area ratio between the non-electrically insulating coating portion 101 and the electrically insulating coating portion 102 at the bottom of the forceps cup 100 is preferably in the range of 1: 4 to 3: 4. Since the high-frequency hemostatic forceps 20 for endoscope is energized with a high-frequency current through a conductive living tissue, the serrated uneven portion 15 has one non-electrically insulating coating when the forceps cup 100 is closed. The portions 16 and the other non-electrically insulating coating portion 16 may be alternately arranged without being opposed to each other, and this is the same at the bottom of the forceps cup.

本実施形態よる内視鏡用高周波止血鉗子20の鉗子カップ100は、カップを閉じた状態において、前記電気絶縁性コーティングを施した以外の非電気絶縁性コーティング部(図中の白抜き部分の導通部分)に高周波電流が通電し、該通電部分に接する生体組織表面を焼灼・凝固することによって、生体組織の外周面に鉗子カップ100の非電気絶縁性コーティング部101による十字状の凝固部と複数の鋸歯状凹凸部15の頂部及び底部の接触部による点線状の凝固部を形成しながら徐々に周辺に凝固が広がっていくことになる。   The forceps cup 100 of the high-frequency hemostatic forceps 20 for an endoscope according to the present embodiment has a non-electrically insulating coating portion other than the electrically insulating coating in the closed state (conduction of a white portion in the figure). A high-frequency current is applied to the portion), and the surface of the living tissue in contact with the energized portion is cauterized and solidified, so that a cross-shaped coagulation portion and a plurality of solidified portions formed by the non-electrically insulating coating portion 101 of the forceps cup 100 are formed on the outer peripheral surface of the living tissue. The solidified portion gradually spreads to the periphery while forming a dotted solidified portion formed by the contact portions of the top and bottom of the serrated uneven portion 15.

従って、本実施形態による内視鏡用高周波止血鉗子20は、挟持した生体組織の外周面全体を焼灼・凝固することなく、非電気絶縁性コーティング部のみに高周波電流を印加することによって、生体組織との接触面積の1/4から3/4の範囲の狭面積に通電するため、狭面積に通電した電流密度の二乗に比例して生体組織の温度が上昇し、短時間に生体組織の外周部を略十字形状の焼結部を形成することができ、いわゆる十字状に焼結して生体組織からの止血を行うことができると共に、鉗子カップ100を開く際の生体組織からの出血を防止することができる。即ち、本実施形態によれば、焼灼・凝固する部分としない部分を組織表面に分散させることによって、高周波電極と生体組織が焦げ付きによる密着部分を減少させ、患部に対する止血と鉗子カップ100を開く際の出血を防止することができる。換言すれば、前述の実施形態によれば、鉗子カップ100の底部に接する生体組織の焼灼・凝固する部分を分断し分散させることによって、高周波電極と生体組織が焦げ付きによる密着部分の剥離力(密着力)を減少させ、せっかく凝固させた粘膜が剥ぎとられてしまうことを防いで、患部に対する止血と鉗子カップ100を開く際の出血を防止することができる。   Therefore, the high-frequency hemostatic forceps 20 for an endoscope according to the present embodiment applies a high-frequency current only to the non-electrically insulating coating portion without cauterizing / coagulating the entire outer peripheral surface of the sandwiched biological tissue, so that the biological tissue Since the current is passed through a narrow area in the range of 1/4 to 3/4 of the contact area with the body, the temperature of the living tissue rises in proportion to the square of the current density passed through the narrow area, and the outer periphery of the living tissue is quickly reached. The portion can be formed into a substantially cross-shaped sintered portion, and can be sintered into a so-called cross shape to stop bleeding from the living tissue and prevent bleeding from the living tissue when the forceps cup 100 is opened. can do. That is, according to the present embodiment, when the cauterized / coagulated part and the non-coagulated part are dispersed on the tissue surface, the high-frequency electrode and the living tissue are reduced in adhesion due to scorching, and the hemostasis to the affected part and the forceps cup 100 are opened. Can prevent bleeding. In other words, according to the above-described embodiment, by separating and dispersing the cauterized / coagulated portion of the living tissue in contact with the bottom of the forceps cup 100, the peeling force (adhering force) of the close contact portion due to scorching between the high-frequency electrode and the living tissue. Force) and the mucosa solidified can be prevented from being peeled off, and hemostasis to the affected area and bleeding when opening the forceps cup 100 can be prevented.

本発明による内視鏡用高周波止血鉗子20の鉗子カップ100の内面である底部に形成する非電気絶縁性コーティング部と電気絶縁性コーティング部の形状は、前述の実施形態の形状に限られるものではなく、他の形状の実施形態を次に説明する。なお、内面である底部の形状以外については、第1の実施形態と同様である。   The shapes of the non-electrically insulating coating portion and the electrically insulating coating portion formed on the bottom, which is the inner surface of the forceps cup 100, of the endoscope high-frequency hemostatic forceps 20 according to the present invention are not limited to the shapes of the above-described embodiments. However, other embodiments will be described next. In addition, it is the same as that of 1st Embodiment except the shape of the bottom part which is an inner surface.

第2の実施形態による鉗子カップ100は、図3に示すように、カップ内面である底部に、斜線で示す略十字形状の高周波電流を通電しない電気絶縁性コーティング部111と、該電気絶縁性コーティング部111の十字形状を除く十字形状中抜きの高周波電流を通電する非電気絶縁性コーティング部112とを施し、第1の実施形態と面積比を逆に構成することによって、生体組織表面の焼灼・凝固部分を増大させることができる。   As shown in FIG. 3, the forceps cup 100 according to the second embodiment includes an electrically insulating coating portion 111 that does not pass a substantially cross-shaped high-frequency current indicated by diagonal lines on the bottom that is the inner surface of the cup, and the electrically insulating coating. A non-electrically insulating coating portion 112 that passes a cross-shaped hollow high-frequency current excluding the cross-shape of the portion 111, and by constructing the area ratio opposite to that of the first embodiment, The coagulation part can be increased.

第3の実施形態による鉗子カップ100は、図4に示すように、カップ内面である底部に、斜線で示す格子形状の高周波電流を通電しない電気絶縁性コーティング部113と、該電気絶縁性コーティング部113の格子形状を除く中抜きの高周波電流を通電する非電気絶縁性コーティング部114とを施すことによって、第2の実施形態と比べて生体組織表面の焼灼・凝固部分少なくすることができる。   As shown in FIG. 4, the forceps cup 100 according to the third embodiment includes an electrically insulating coating portion 113 that does not pass a grid-shaped high-frequency current indicated by diagonal lines on the bottom that is the inner surface of the cup, and the electrically insulating coating portion. By applying the non-electrically insulating coating portion 114 for supplying a hollow high-frequency current excluding the lattice shape 113, the ablation / coagulation portion on the surface of the living tissue can be reduced as compared with the second embodiment.

第4の実施形態による鉗子カップ100の内面である底部は、図5に示すように、第3の実施形態(図4)の格子幅を拡げた斜線で示す格子形状の電気絶縁性コーティング部115と、該電気絶縁性コーティング部115の格子形状を除く中抜きの非絶縁性の非電気絶縁性コーティング部116とを施すことによって、第3の実施形態と比べて生体組織表面の焼灼・凝固部分少なくすることができ、また生体組織表面の焼灼・凝固部分を点状に配置させることができる。この電気絶縁性コーティング部と非電気絶縁性コーティング部の形状は、図に示す2色の正方形(または長方形)を接しながら交互に配した市松模様であっても良い。   As shown in FIG. 5, the bottom, which is the inner surface of the forceps cup 100 according to the fourth embodiment, is a grid-shaped electrically insulating coating portion 115 indicated by diagonal lines with the grid width expanded in the third embodiment (FIG. 4). And a non-insulating non-insulating coating portion 116 with a hollow shape excluding the lattice shape of the electrically insulating coating portion 115, thereby producing a cauterized / coagulated portion on the surface of the living tissue as compared with the third embodiment. In addition, the ablation / coagulation portion on the surface of the living tissue can be arranged in the form of dots. The shapes of the electrically insulating coating portion and the non-electrically insulating coating portion may be a checkered pattern in which two colored squares (or rectangles) shown in the drawing are alternately arranged.

第5の実施形態による鉗子カップ100の内面は、図6に示すように、第3の実施形態(図4)の電気絶縁性コーティング部と非電気絶縁性コーティング部を反転し、カップ底部に白抜き格子形状の非電気絶縁性コーティング部117と、該非電気絶縁性コーティング部117の白抜き格子形状を除く斜線で示す絶縁性の電気絶縁性コーティング部118とを施し、第3の実施形態と面積比を逆に構成することによって、生体組織表面の焼灼・凝固部分を網の目状にすることができる。   As shown in FIG. 6, the inner surface of the forceps cup 100 according to the fifth embodiment is reversed from the electrically insulating coating portion and the non-electrically insulating coating portion of the third embodiment (FIG. 4), and white on the cup bottom. A non-electrically insulating coating part 117 having a blank grid shape and an insulating electric insulating coating part 118 indicated by oblique lines excluding the white grid shape of the non-electrical insulating coating part 117 are provided, and the area and area of the third embodiment By configuring the ratio in reverse, the cauterized / solidified portion on the surface of the living tissue can be formed into a mesh.

第6の実施形態による鉗子カップ100の内面である底部は、図7に示すように、第4の実施形態(図5)に比べて個々の面積を小さくした点状の非電気絶縁性コーティング部119と、該非電気絶縁性コーティング部119を除く部分を電気絶縁性コーティング部120を施すことによって、微細な点状の焼灼・凝固部分を生体組織表面に分散させることができる。   As shown in FIG. 7, the bottom part, which is the inner surface of the forceps cup 100 according to the sixth embodiment, is a point-like non-electrically insulating coating part having an individual area smaller than that of the fourth embodiment (FIG. 5). By applying the electrically insulating coating portion 120 to the portion excluding 119 and the non-electrically insulating coating portion 119, fine dot-like cauterized / coagulated portions can be dispersed on the surface of the living tissue.

第7の実施形態による鉗子カップ100の内面は、図8に示すように、カップ底部に細線傾斜格子状の電気絶縁性コーティング部121と、該電気絶縁性コーティング部121の細線傾斜格子部分を除く部分の白抜きで示す非電気絶縁性コーティング部122とを施すことによって、生体組織の表面全体の焼灼・凝固部分を多数の菱形形状にすることができる。   As shown in FIG. 8, the inner surface of the forceps cup 100 according to the seventh embodiment excludes an electrically insulating coating part 121 in the form of a finely inclined grid on the bottom of the cup and a finely inclined line part of the electrically insulating coating part 121. By applying the non-electrical insulating coating portion 122 shown by white portions, the cauterized / solidified portion of the entire surface of the living tissue can be formed into a number of rhombus shapes.

第8の実施形態による鉗子カップ100の内面は、図9に示すように、カップ底部に複数の同心トラック形状の電気絶縁性コーティング部123と、該電気絶縁性コーティング部123の複数の同心トラック部分を除く部分の白抜きで示す非電気絶縁性コーティング部124とを施すことによって、生体組織の表面の焼灼・凝固部分をトラック形状にすることができる。   As shown in FIG. 9, the inner surface of the forceps cup 100 according to the eighth embodiment includes a plurality of concentric track-shaped electrical insulating coating portions 123 at the bottom of the cup, and a plurality of concentric track portions of the electrical insulating coating portions 123. By applying the non-electrical insulating coating portion 124 shown in white in the portion excluding white, the cauterized / solidified portion on the surface of the living tissue can be made into a track shape.

第9の実施形態による鉗子カップ100の内面は、図10に示すように、第6の実施形態(図7)に比して電気絶縁性コーティング部を細線格子状にしたものであって、細線格子状の電気絶縁性コーティング部125と、該電気絶縁性コーティング部125を除く微細な長方白抜きで示す非電気絶縁性コーティング部126とを施すことによって、生体組織の全体表面の焼灼・凝固部分を微細な網焼き形状にすることができる。   As shown in FIG. 10, the inner surface of the forceps cup 100 according to the ninth embodiment has an electrically insulating coating portion in the form of a fine-line lattice as compared with the sixth embodiment (FIG. 7). By applying the grid-like electrically insulating coating portion 125 and the non-electrically insulating coating portion 126 shown in fine white outline excluding the electrically insulating coating portion 125, cauterization / coagulation of the entire surface of the living tissue is performed. The portion can be made into a fine grilled shape.

第10の実施形態による鉗子カップ100の内面は、図11に示すように、図11中の横方向に延びる線状の電気絶縁性コーティング部127と、該電気絶縁性コーティング部127を除く白抜きの横方向に延びる長方板形状の非電気絶縁性コーティング部128とを施すことによって、生体組織の全体表面の焼灼・凝固部分を微細な板線形状にすることができる。   As shown in FIG. 11, the inner surface of the forceps cup 100 according to the tenth embodiment has a linear electric insulating coating portion 127 extending in the lateral direction in FIG. 11, and white portions excluding the electric insulating coating portion 127. By applying the rectangular plate-shaped non-electrically insulating coating portion 128 extending in the lateral direction, the cauterized / solidified portion of the entire surface of the living tissue can be formed into a fine plate wire shape.

第11の実施形態による鉗子カップ100の内面は、図12に示すように、断続した複数の同心トラック形状の電気絶縁性コーティング部129と、該断続複数同心トラック形状の電気絶縁性コーティング部129を除く白抜き形状の非電気絶縁性コーティング部130とを施すことによって、生体組織の全体表面に断続した複数トラック形状の焼灼・凝固部分を形成することができる。   As shown in FIG. 12, the inner surface of the forceps cup 100 according to the eleventh embodiment includes a plurality of intermittent concentric track-shaped electrical insulating coating portions 129, and an intermittent multiple concentric track-shaped electrical insulating coating portion 129. By applying the non-electrically-insulating coating portion 130 having a white shape excluding white, it is possible to form a plurality of track-shaped cauterized / solidified portions intermittently on the entire surface of the living tissue.

また、前記実施形態においては一対の鉗子カップは、それぞれ底部に同一配置の電気絶縁性コーティング部及び非電気絶縁性コーティング部を設ける例を説明したが、本発明による一対の鉗子カップは、電気絶縁性コーティング部及び非電気絶縁性コーティング部(図2から図12)の配置が異なるカップを組み合わせても良い。特に図2に示した鉗子カップと図3に示した鉗子カップを組み合わせて一対の電極を構成することにより、カップ内全体が生体組織表面を2分割に異なる焼灼・凝固部を形成することによって、粘膜との接着力も減少し、カップと粘膜との離脱も容易になり、止血施術終了後に鉗子片を開いた際にも生体組織からの出血を防止することができる。これは、後述する実施形態においても同様である。   In the above-described embodiment, the pair of forceps cups has been described with an example in which an electrically insulating coating portion and a non-electrically insulating coating portion are provided at the bottom, but the pair of forceps cups is electrically insulated. Cups having different arrangements of the conductive coating portion and the non-electrically insulating coating portion (FIGS. 2 to 12) may be combined. In particular, by forming a pair of electrodes by combining the forceps cup shown in FIG. 2 and the forceps cup shown in FIG. 3, the entire inside of the cup forms a cauterization / coagulation part different from the living tissue surface in two parts, The adhesive force with the mucous membrane is also reduced, and the cup and the mucosa can be easily detached, and bleeding from the living tissue can be prevented even when the forceps piece is opened after the hemostasis operation is completed. The same applies to the embodiments described later.

前述の実施形態においては生体組織の固まりを内部に収納するカップ状の鉗子カップをもつ内視鏡用高周波止血鉗子を説明したが、本発明は、鉗子カップに限られるものではなく、棒状の高周波電極により血管等を挟持して止血を行う内視鏡用高周波止血鉗子にも適用することができ、この第12の実施形態を次に説明する。   In the above-described embodiment, the endoscopic high-frequency hemostatic forceps having a cup-shaped forceps cup that accommodates a lump of living tissue has been described. However, the present invention is not limited to the forceps cup, and is a rod-shaped high-frequency forceps. The twelfth embodiment can be applied to an endoscopic high-frequency hemostatic forceps that clamps a blood vessel or the like with an electrode to stop hemostasis.

この第12の実施形態による内視鏡用高周波止血鉗子は、図13及び図14に示すように、導電性金属からなり、高周波電極として機能する一対の棒状鉗子30と、該棒状鉗子30を開閉する軸となる支軸12と、該支軸12の中間部を支持する支持部を有する支持枠体9と、前記支軸12と間隔を空けて配置される連結軸14と、前記支持枠体9を保持する可撓性シース2他とから構成される。この内視鏡用高周波止血鉗子は、前記図1に示した内視鏡用高周波止血鉗子と同様に、可撓性シース2の手元側の端部(基端部)に操作部が連結され、この可撓性シース2内に通された導電性の操作ワイヤーを長手方向に操作者がスライド動作させることにより開閉し、且つ通電することによって、操作ワイヤーを経由して一対の棒状鉗子30間に高周波電流を流すことができる。   As shown in FIGS. 13 and 14, the high-frequency hemostatic forceps for endoscope according to the twelfth embodiment is composed of a conductive metal and functions as a high-frequency electrode, and a pair of rod-shaped forceps 30 that opens and closes the rod-shaped forceps 30. A support shaft 9 that has a support portion that supports the intermediate portion of the support shaft 12, a connecting shaft 14 that is spaced apart from the support shaft 12, and the support frame body. 9 and the flexible sheath 2 and others. The high-frequency hemostatic forceps for endoscope has an operation portion connected to the proximal end portion (base end portion) of the flexible sheath 2 in the same manner as the high-frequency hemostatic forceps for endoscope shown in FIG. The conductive operation wire passed through the flexible sheath 2 is opened and closed by sliding the operator in the longitudinal direction, and when energized, between the pair of rod-shaped forceps 30 via the operation wire. A high-frequency current can flow.

特に本実施形態による棒状鉗子30は、生体組織と接触する接触部を構成する一対の電極面31に、電気絶縁性コーティング部42と非電気絶縁性コーティング部41とを交互に配し、高周波電流を通電することによって、破線状の焼灼・凝固部分を生体組織表面に分断して形成することができ、棒状鉗子30を開いた際に生体組織からの出血を防止することができる。また、前記棒状鉗子30は、伝導性のある生体組織を介して高周波電流が通電するため、棒状鉗子30を閉じた状態において一方の非電気絶縁性コーティング部41と他方の非電気絶縁性コーティング部41とを対向して配置せずに交互に配置しても良い。   In particular, the rod-shaped forceps 30 according to the present embodiment alternately arranges the electrically insulating coating portions 42 and the non-electrically insulating coating portions 41 on the pair of electrode surfaces 31 that constitute the contact portion that comes into contact with the living tissue, thereby generating a high frequency current. Can be formed by dividing the broken-line cauterized / coagulated portion on the surface of the living tissue, and can prevent bleeding from the living tissue when the bar-shaped forceps 30 is opened. Further, since the bar-shaped forceps 30 is supplied with a high-frequency current through conductive living tissue, one non-electrically insulating coating part 41 and the other non-electrically-insulating coating part are in a state where the bar-shaped forceps 30 are closed. 41 may be arranged alternately instead of facing each other.

さらに、前述の第1〜11の実施形態の鉗子カップ100の内面である底部に設ける電気絶縁性コーティング部と非電気絶縁性コーティング部の形状は前述の実施形態にて説明したものに加え、図15に示すように、幅をもつ円状の複数の非電気絶縁性コーティング部131を電気絶縁性コーティング部132に配したものや、図16に示すように、分断した同心長円状に中央から放射状に延びる分断直線からなる非電気絶縁性コーティング部133を電気絶縁性コーティング部134に配したものや、図17に示すように、図中の上下に2分割した同心長円状の非電気絶縁性コーティング部135を電気絶縁性コーティング部136に配したものや、図18に示すように、同心円状の複数の電気絶縁性コーティング部137を非電気絶縁性コーティング部138に配したものや、図19に示すように、白抜きで示す非電気絶縁性コーティング部139に幅広且つ分断した円形状の電気絶縁性コーティング部140を配したものであっても良い。   Furthermore, the shapes of the electrically insulating coating portion and the non-electrically insulating coating portion provided on the bottom which is the inner surface of the forceps cup 100 of the first to eleventh embodiments described above are the same as those described in the previous embodiment. As shown in FIG. 15, a plurality of circular non-electrically insulating coating portions 131 having a width are arranged on the electrically insulating coating portion 132, or as shown in FIG. A non-electrical insulating coating part 133 formed of a radially extending dividing line is arranged on the electric insulating coating part 134, or as shown in FIG. The conductive coating portion 135 is disposed on the electrically insulating coating portion 136, or a plurality of concentric electrical insulating coating portions 137 are non-electrically insulating as shown in FIG. As shown in FIG. 19, a wide and divided circular electrically insulating coating portion 140 may be disposed on the non-electrically insulating coating portion 139 shown in white as shown in FIG. .

以上述べたように、本発明の各実施形態による内視鏡用高周波止血鉗子は、高周波電極である鉗子に所定の面積比を有する非電気絶縁性コーティング部と電気絶縁性コーティング部を配置し、生体組織に高周波電流を印加して焼灼・凝固する部分と焼灼・凝固しない部分とを組織表面に分散させ、且つ高周波電極と生体組織が焦げ付きによる密着部分を減少させることによって、高周波電極の鉗子を生体組織から開く際の焦げ付き密着による出血を防止することができる。   As described above, the endoscopic high-frequency hemostatic forceps according to each embodiment of the present invention includes a non-electrically insulating coating portion and an electrically insulating coating portion having a predetermined area ratio on the forceps that are high-frequency electrodes, By applying a high-frequency current to the living tissue to disperse the cauterized / solidified part and the non-cauterized / coagulated part on the tissue surface, and by reducing the adherent part of the high-frequency electrode and the living tissue being burnt, It is possible to prevent bleeding due to burning adhesion when opening from a living tissue.

2 可撓性シース
9 支持枠体
11 駆動アーム
12 支軸
13 リンク機構
14 連結軸
15 鋸歯状凹凸部
20 内視鏡用高周波止血鉗子
30 棒状鉗子
100 鉗子カップ
16、101 非電気絶縁性コーティング部
24、102、103 電気絶縁性コーティング部
2 Flexible sheath 9 Support frame 11 Drive arm 12 Support shaft 13 Link mechanism 14 Connection shaft 15 Serrated uneven portion 20 High-frequency hemostatic forceps 30 for endoscope 30 Rod-shaped forceps 100 Forceps cup 16, 101 Non-electrically insulating coating portion 24 , 102, 103 Electrically insulating coating

Claims (12)

導電性金属からなり生体組織に高周波電流を通電する高周波電極として機能する凹状底部を有するカップ状鉗子片の一対を開閉自在に構成した内視鏡用高周波止血鉗子において、
前記カップ状鉗子片の生体組織に接する接触部の底部に、前記高周波電流を通電しない電気絶縁性コーティング部と、前記高周波電流を通電し、高周波電極として機能する非電気絶縁性コーティング部とが分断して構成されていることを特徴とする内視鏡用高周波止血鉗子。
In a high-frequency hemostatic forceps for an endoscope configured to be able to open and close a pair of cup-shaped forceps pieces made of a conductive metal and having a concave bottom portion that functions as a high-frequency electrode for supplying a high-frequency current to living tissue,
The bottom part of the contact part of the cup-shaped forceps piece that contacts the living tissue is divided into an electrically insulating coating part that does not pass the high-frequency current and a non-electrical insulating coating part that passes the high-frequency current and functions as a high-frequency electrode. A high-frequency hemostatic forceps for an endoscope characterized by being configured as described above.
前記電気絶縁性コーティング部と非電気絶縁性コーティング部との面積比が1対4から3対4の範囲に設定されていることを特徴とする請求項1記載の内視鏡用高周波止血鉗子。   The high-frequency hemostatic forceps for endoscope according to claim 1, wherein an area ratio between the electrically insulating coating portion and the non-electrically insulating coating portion is set in a range of 1: 4 to 3: 4. 前記カップ状鉗子片が長円状の開口部を有し、前記非電気絶縁性コーティング部が前記長円状開口部内の底部を十字に横断する形状に構成されていることを特徴とする請求項1又は2記載の内視鏡用高周波止血鉗子。   The cup-shaped forceps piece has an oval opening, and the non-electrically insulating coating portion is formed in a shape that crosses the bottom of the oval opening in a cross shape. The high-frequency hemostatic forceps for endoscope according to 1 or 2. 前記カップ状鉗子片が長円状の開口縁を有し、前記電気絶縁性コーティング部が前記長円状開口部内の底部を十字に横断する形状に構成されているまたことを特徴とする第1又第2の特徴の内視鏡用高周波止血鉗子。   The cup-shaped forceps piece has an oval opening edge, and the electrically insulating coating portion is configured to cross a bottom in the oval opening in a cross shape. A high-frequency hemostatic forceps for an endoscope having a second feature. 前記カップ状鉗子片が、長円状の開口部を有し、前記電気絶縁性コーティング部が前記長円状開口部内の底部を格子状に横断する形状に構成されていることを特徴とする第1又第2の特徴の内視鏡用高周波止血鉗子。 The cup-shaped forceps piece has an oval opening, and the electrically insulating coating portion is configured in a shape that crosses the bottom in the oval opening in a lattice shape. A high-frequency hemostatic forceps for an endoscope having the first or second feature. 前記カップ状鉗子片が、長円状の開口部を有し、前記非電気絶縁性コーティング部が前記長円状開口部内の底部を格子状に横断する形状に構成されていることを特徴とする第1又第2の特徴の内視鏡用高周波止血鉗子。   The cup-shaped forceps piece has an oval opening, and the non-electrically insulating coating portion is configured to cross the bottom of the oval opening in a lattice shape. A high-frequency hemostatic forceps for an endoscope having the first or second characteristics. 前記カップ状鉗子片が、長円状の開口部を有し、前記電気絶縁性コーティング部が前記長円状開口部内の底部を同心の複数トラック形状に構成されていることを特徴とする請求項1又は2記載の内視鏡用高周波止血鉗子。   The cup-shaped forceps piece has an oval opening, and the electrically insulating coating portion is formed in a concentric multi-track shape with a bottom in the oval opening. The high-frequency hemostatic forceps for endoscope according to 1 or 2. 前記複数トラック形状に構成された電気絶縁性コーティング部が円周方向に分断されていることを特徴とする請求項7記載の内視鏡用高周波止血鉗子。   The high-frequency hemostatic forceps for endoscope according to claim 7, wherein the electrically insulating coating portion configured in a plurality of track shapes is divided in a circumferential direction. 前記カップ状鉗子片が、長円状の開口部を有し、前記電気絶縁性コーティング部が前記長円状開口部内の底部を横断する複数の線状に構成されていることを特徴とする請求項1又は2記載の内視鏡用高周波止血鉗子。   The cup-shaped forceps piece has an oval opening, and the electrically insulating coating portion is configured in a plurality of lines that cross the bottom of the oval opening. Item 3. The high-frequency hemostatic forceps for endoscope according to Item 1 or 2. 前記カップ状鉗子片が、長円状の開口部を有し、前記非電気絶縁性コーティング部が前記長円状開口部内の底部内に位置する複数の円状に構成されていることを特徴とする請求項1又は2記載の内視鏡用高周波止血鉗子。   The cup-shaped forceps piece has an oval opening, and the non-electrically insulating coating portion is configured in a plurality of circles located in the bottom of the oval opening. The endoscopic high-frequency hemostatic forceps according to claim 1 or 2. 前記一対のカップ状鉗子片の底部に構成された電気絶縁性コーティング部と非電気絶縁性コーティング部の配置が異なるように構成されていることを特徴とする請求項1から10の何れかに記載の内視鏡用高周波止血鉗子。   11. The structure according to claim 1, wherein the electrical insulating coating portion and the non-electrical insulating coating portion configured on the bottom of the pair of cup-shaped forceps pieces are configured to be different in arrangement. Endoscopic high-frequency hemostatic forceps. 導電性金属からなり生体組織に高周波電流を通電する高周波電極として機能する一対の棒状の棒状鉗子片を開閉自在に構成した内視鏡用高周波止血鉗子において、
前記棒状鉗子片の生体組織に接する接触部に、前記高周波電流を通電しない非電気絶縁性コーティング部と、前記高周波電流を通電する電気絶縁性コーティング部とを、棒状の長さ方向に沿って分断されていることを特徴とする内視鏡用高周波止血鉗子。
In a high-frequency hemostatic forceps for an endoscope that is configured to be capable of opening and closing a pair of rod-shaped forceps pieces made of a conductive metal and functioning as a high-frequency electrode that supplies a high-frequency current to living tissue,
The non-electrically insulating coating portion that does not pass the high-frequency current and the electrically insulating coating portion that passes the high-frequency current are separated along the rod-shaped length direction at the contact portion of the rod-shaped forceps piece that contacts the living tissue. An endoscopic high-frequency hemostatic forceps characterized by being made.
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