JP2005261514A - Beak-like high frequency hemostatic forceps for endoscope - Google Patents

Beak-like high frequency hemostatic forceps for endoscope Download PDF

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JP2005261514A
JP2005261514A JP2004075454A JP2004075454A JP2005261514A JP 2005261514 A JP2005261514 A JP 2005261514A JP 2004075454 A JP2004075454 A JP 2004075454A JP 2004075454 A JP2004075454 A JP 2004075454A JP 2005261514 A JP2005261514 A JP 2005261514A
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beak
endoscope
formed
shaped
electrode
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Tomoshi Kidooka
智志 木戸岡
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Pentax Corp
ペンタックス株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a beak-like high frequency hemostatic forceps for an endoscope providing a high hemostatic effect and highly safely used without intercepting the observation vidual field of the endoscope. <P>SOLUTION: This beak-shaped high frequency hemostatic forceps for the endoscope is provided with a pair of beak-shaped electrodes 3 opened/closed like a beak in its distal end and the pair of beak-shaped electrodes 3 are formed into a non-cup shape where the whole bodies of the respective opposed faces become the engagement faces 3a. The back 3b of each beak-shaped electrode 3 is formed into a tapered shape gradually narrowed toward the tip side and the side part 3c of each beak-like electrode 3 may be formed into the tapered shape gradually narrowed toward the tip side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は内視鏡用嘴状高周波止血鉗子に関する。 This invention relates beak frequency hemostatic forceps for an endoscope.

内視鏡用嘴状高周波止血鉗子は一般に、嘴状に開閉する一対の嘴状電極を先端に有しており、そのような嘴状電極は各々、断面形状が円形のステンレス棒材を切削して鉗子カップ状に形成されている(例えば、特許文献1)。 The endoscopic beak frequency hemostatic forceps generally a pair of beak-shaped electrode for opening and closing the beak has a tip, each such beak-shaped electrode, sectional shape cut a circular stainless steel rod is formed in the forceps cup Te (e.g., Patent Document 1).
特開平10−155798 JP-A-10-155798

しかし、上述のような従来の内視鏡用嘴状高周波止血鉗子は、各嘴状電極が鉗子カップ状に形成されていることにより、粘膜組織に接触する鉗子カップの縁部分において高周波電流の電流密度が非常に大きくなるため、切開効果が生じて止血効果が低くなってしまう場合がある。 However, the conventional endoscopic beak frequency hemostatic forceps as described above, by the beak-shaped electrodes are formed on the shape forcep cups, the current of the high-frequency current at the edge portion of the forceps cup in contact with the mucosal tissue the density is very large, there are cases where the incision effective hemostatic effect occurs becomes low.

また、嘴状電極の外面が鉗子カップ状にこんもりとした形状なので、内視鏡観察画面中においては、図6に示されるように、嘴状電極30によって観察視野が大きく遮られてしまう欠点がある。 Further, since the outer surface of the beak-shaped electrode is Konmori and shape to form the forcep cups, in the endoscope observation image in, as shown in FIG. 6, the disadvantage of the observation field by the beak-shaped electrodes 30 will be blocked large is there.

そこで本発明は、高い止血効果が得られ、しかも内視鏡の観察視野を遮らずに高い安全性の下で使用することができる内視鏡用嘴状高周波止血鉗子を提供することを目的とする。 The present invention provides high hemostatic effect, moreover aims to provide an endoscopic beak frequency hemostatic forceps that can be used under endoscopic high safety without blocking the observation field to.

上記の目的を達成するため、本発明の内視鏡用嘴状高周波止血鉗子は、嘴状に開閉する一対の嘴状電極を先端に有する内視鏡用嘴状高周波止血鉗子において、一対の嘴状電極を各々、あい対向する面全体が噛み合わせ面になる非カップ状に形成したものであり、その場合に、一対の嘴状電極の噛み合わせ面が、側方から見て山と谷が噛み合う波形に形成されていてもよい。 To achieve the above object, the endoscope beak frequency hemostatic forceps of the present invention, in the beak frequency hemostatic forceps for an endoscope having a pair of beak-shaped electrode for opening and closing the beak at the distal end, the pair of beak respectively Jo electrode, which entire opposing surfaces formed on the non-cup-shaped to be engaged thereby surface, in that case, the surface engagement of the pair of beak-shaped electrodes, the peaks and valleys when viewed from the side it may be formed in a waveform meshing.

なお、各嘴状電極の背部が先側へ漸次窄まったテーパ状に形成されているとよく、各嘴状電極の側面部分も先側へ漸次窄まったテーパ状に形成されていてもよい。 Incidentally, well the back of the beak-shaped electrodes are formed on the gradually narrowed tapered to the front side, may be formed on the side surface portion is also gradually narrowed tapered to the front side of the beak-shaped electrode .

本発明によれば、一対の嘴状電極を各々、あい対向する面全体が噛み合わせ面になる非カップ状に形成したことにより、粘膜組織等を挟み込んで高周波電流を通電した時に高周波電流の電流密度が大きくならないので、切開効果が発生せず優れた止血効果を得ることができ、各嘴状電極の背部を先側へ漸次窄まったテーパ状に形成することにより、内視鏡の観察視野を遮らずに高い安全性の下で使用することができる。 According to the present invention, each pair of beak-shaped electrodes, by the entire opposing surfaces formed on the non-cup-shaped to be engaged thereby surface, the high frequency current when the high-frequency current has been conducted by sandwiching a mucosal tissue such current the density is not increased, it is possible to incision effect obtain excellent hemostatic effect does not occur, by forming a tapered shape which gradually narrowed the back of the beak-shaped electrode to the front side, the observation field of the endoscope it can be used under high security without blocking the.

嘴状に開閉する一対の嘴状電極を先端に有する内視鏡用嘴状高周波止血鉗子において、一対の嘴状電極を各々、あい対向する面全体が噛み合わせ面になる非カップ状に形成すると共に、各嘴状電極の背部を、先側へ漸次窄まったテーパ状に形成する。 In endoscopic beak frequency hemostatic forceps having a pair of beak-shaped electrode for opening and closing the beak at the distal end, each pair of beak-shaped electrodes, the entire opposing surfaces are formed in the non-cup-shaped to be engaged thereby surface with the back of the beak-shaped electrodes are formed to gradually narrowed tapered to the front side.

図面を参照して本発明の実施例を説明する。 With reference to the accompanying drawings illustrating the embodiment of the present invention.
図1は内視鏡用嘴状高周波止血鉗子の先端付近を示しており、図示されていない内視鏡の処置具挿通チャンネルに挿脱される可撓性シース1は、ステンレス鋼線製の密着巻きコイルパイプ1aの外周に電気絶縁性チューブ1bを被覆して形成されている。 Figure 1 shows the distal end near the endoscopic beak frequency hemostatic forceps, the flexible sheath 1 to be inserted into and removed from the treatment instrument insertion channel of an endoscope not shown, adhesion stainless steel wire It is formed by coating the electrically insulating tube 1b on the outer periphery of the wound coil pipe 1a.

可撓性シース1の先端に連結された先端本体2の最先端部には、一対の嘴状電極3が支軸4を中心に開閉するように軸支されて、嘴状電極3を嘴状に開閉駆動するためのリンク機構5が、先端本体2に形成されたスリット2a内に配置されている。 The cutting edge portion of the flexible sheath 1 of the ligated tip body distal end 2, a pair of beak-shaped electrode 3 is rotatably supported to open and close around the supporting shaft 4, beak beak-like electrode 3 closing the link mechanism 5 for driving is arranged in the slit 2a formed in the tip body 2.

リンク機構5の後端部分には、可撓性シース1内に軸線方向に進退自在に挿通配置されたステンレス鋼線製の操作ワイヤ6の先端が連結されていて、可撓性シース1の基端に連結されている操作部(図示せず)で操作ワイヤ6を進退操作することにより嘴状電極3を嘴状に開閉させることができ、また、操作ワイヤ6を経由して操作部側から嘴状電極3に高周波電流を通電することができる。 The rear end portion of the link mechanism 5, the tip of the flexible sheath 1 within the axially retractably inserted arranged stainless steel wire of the operating wire 6 have is connected, of the flexible sheath 1 group the beak-like electrode 3 can be opened and closed in beak by advancing and retracting operation of the operation wire 6 by the operation portion coupled to an end (not shown), also from the operation unit side via the operating wire 6 it can be a high frequency current to the beak-like electrode 3.

一対の嘴状電極3は、その単体の斜視図、側面図及び平面図である図2、図3及び図4にも示されるように、嘴状に閉じた際にあい対向する面全体が噛み合わせ面3aになる非カップ状に形成されている。 A pair of beak-shaped electrodes 3 is a perspective view of the single, 2 is a side view and a plan view, as also shown in FIGS. 3 and 4, chewing entire surface which faces in a closed beak It is formed in the non-cup-shape having the mating surface 3a.

その結果、一対の嘴状電極3で粘膜組織等を挟み込んで高周波電流を通電した時に、高周波電流の電流密度が大きくならないので、切開効果が発生せず優れた止血効果を得ることができる。 As a result, when a high-frequency current sandwich the mucosal tissue or the like with the pair of beak-shaped electrode 3, since the current density of the high frequency current is not increased, it is possible incision effect obtain excellent hemostatic effect does not occur.

この実施例の噛み合わせ面3aは側方から見て90°程度の角度の角波形状に形成されていて、その角波形の先端どうしがぶつかり合うのではなく、一対の嘴状電極3において山と谷が噛み合うように形成してある。 Engagement surface 3a of this embodiment is formed in a corner wave shape of angle of about seen 90 ° from the side, rather than the tip each other in the corner waveform collide, mountain in a pair of beak-shaped electrodes 3 It is formed so that the valley is engaged with.

それによって、一対の嘴状電極3の双方の噛み合わせ面3aの間が広い面積においてほぼ均一な隙間になり、そのような一対の嘴状電極3の間に粘膜組織を挟み込むと、角波形状の噛み合わせ面3aがほぼ全面で粘膜組織に接触する。 Thereby becomes substantially uniform gap in the wide area between both of mating surfaces 3a of the pair of beak-shaped electrodes 3 and sandwich the mucosal tissue during such pair of beak-shaped electrodes 3, triangular wave shape engagement surface 3a of contacts the mucosal tissue substantially entirely.

その結果、噛み合わせ面3aが平面である場合より高周波電流の電流密度が小さくなって、より優れた止血効果が得られる。 As a result, engagement surface 3a becomes smaller current density of the high frequency current than if a plane, better hemostatic effect can be obtained. なお、角波形の角度は90°以外であってもよく、或いはサインカーブ等のような曲線的な波形により山と谷が噛み合うように構成しても差し支えない。 The angle of the corner waveform no problem be configured such peaks and valleys are engaged by curvilinear waveforms, such as good, or sine curve be other than 90 °.

また、各嘴状電極3の背部3bは、先側へ漸次窄まったテーパ状に形成されている。 Further, the back 3b of the beak-like electrode 3 is formed gradually narrowed tapered to the front side. その結果、内視鏡観察画面中においては、図5に示されるように、嘴状電極3によって観察視野が大きく遮られず、良好な視界が得られるので、高い安全性の下で止血処置を行うことができる。 As a result, in the endoscope observation image in, as shown in FIG. 5, unobstructed large observation field is the beak electrode 3, because clearly visible is obtained, the hemostasis under high safety It can be carried out. なお、図5には、比較のために従来の嘴状電極30を二点鎖線で示してある。 Incidentally, in FIG. 5 shows a conventional beak electrodes 30 a two-dot chain line for comparison.

また、この実施例においては、各嘴状電極3の側面部分3cも、先側へ漸次窄まったテーパ状に形成されている。 Further, in this embodiment, the side surface portion 3c of the beak electrode 3 is also formed gradually narrowed tapered to the front side. その結果、背部3bの形状とも合わせて嘴状電極3の外表面における接触面積が小さくなり、粘膜組織に対する熱的悪影響を小さくすることができる。 As a result, contact area at the outer surface of the beak-like electrode 3 also fit the shape of the back 3b is reduced, it is possible to reduce the thermal adverse effect on mucosal tissue.

嘴状電極3の支軸4と係合する軸孔3dより後方部分には、リンク機構5の一部を構成するアーム部3eが延出形成されている。 The support shaft 4 and the rear portion than engaging the shaft hole 3d of the beak-like electrode 3, the arm portion 3e which constitutes a part of the link mechanism 5 is formed to extend. ただし、この部分の形状等はどのようにしても差し支えない。 However, the shape of this part is no problem in any way.

本発明の実施例の内視鏡用嘴状高周波止血鉗子の先端付近の側面断面図である。 Is a side cross-sectional view in the vicinity of the distal end of the endoscope beak frequency hemostatic forceps embodiments of the present invention. 本発明の実施例の嘴状電極の単体の斜視図である。 It is a perspective view of a single beak electrode embodiment of the present invention. 本発明の実施例の嘴状電極の単体の側面図である。 It is a side view of a single beak electrode embodiment of the present invention. 本発明の実施例の嘴状電極の単体の平面図である。 It is a plan view of a single beak electrode embodiment of the present invention. 本発明の実施例の内視鏡用嘴状高周波止血鉗子の内視鏡観察画像を示す略示図である。 The endoscope observation image of the endoscope beak frequency hemostatic forceps embodiments of the present invention is a schematic view showing. 従来の内視鏡用嘴状高周波止血鉗子の内視鏡観察画像を示す略示図である。 Is a schematic view showing an endoscope observation image of a conventional endoscopic beak frequency hemostatic forceps.

符号の説明 DESCRIPTION OF SYMBOLS

1 可撓性シース 3 嘴状電極 3a 噛み合わせ面 3b 背部 3c 側面部分 1 the flexible sheath 3 beak electrodes 3a occlusal surface 3b back 3c side portions

Claims (4)

  1. 嘴状に開閉する一対の嘴状電極を先端に有する内視鏡用嘴状高周波止血鉗子において、 In beak frequency hemostatic forceps for an endoscope having a pair of beak-shaped electrode for opening and closing the beak at the distal end,
    上記一対の嘴状電極を各々、あい対向する面全体が噛み合わせ面になる非カップ状に形成したことを特徴とする内視鏡用嘴状高周波止血鉗子。 It said each pair of beak-shaped electrodes, beak frequency hemostatic forceps for an endoscope, characterized in that the entire opposing surfaces formed on the non-cup-shaped to be engaged thereby surface.
  2. 上記一対の嘴状電極の噛み合わせ面が、側方から見て山と谷が噛み合う波形に形成されている請求項1記載の内視鏡用嘴状高周波止血鉗子。 The pair of beak-shaped engagement surface of the electrode is, endoscopic beak frequency hemostatic forceps according to claim 1, wherein formed in the waveform peaks and valleys meshing when viewed from the side.
  3. 上記各嘴状電極の背部が先側へ漸次窄まったテーパ状に形成されている請求項1又は2記載の内視鏡用嘴状高周波止血鉗子。 Endoscopic beak frequency hemostatic forceps according to claim 1 or 2, wherein the back of each beak electrodes are formed gradually narrowed tapered to the front side.
  4. 上記各嘴状電極の側面部分も先側へ漸次窄まったテーパ状に形成されている請求項3記載の内視鏡用嘴状高周波止血鉗子。 Each beak side portions also endoscopic beak frequency hemostatic forceps according to claim 3, wherein the formed gradually narrowed tapered to the front side of the electrode.
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