JP4556000B2 - Endoscopic monopolar high frequency scissors - Google Patents

Endoscopic monopolar high frequency scissors Download PDF

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JP4556000B2
JP4556000B2 JP2007139707A JP2007139707A JP4556000B2 JP 4556000 B2 JP4556000 B2 JP 4556000B2 JP 2007139707 A JP2007139707 A JP 2007139707A JP 2007139707 A JP2007139707 A JP 2007139707A JP 4556000 B2 JP4556000 B2 JP 4556000B2
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幸 西村
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有限会社リバー精工
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本発明は、内視鏡の処置具案内管路内に通して使用される内視鏡用モノポーラ型高周波鋏に関する。 The present invention relates to an endoscopic monopolar RF scissors used through the endoscope treatment instrument guide conduit.

内視鏡用高周波切開具としては、使用目的によって各種の形状のものがあるが、粘膜剥離術を行うためには、内視鏡の処置具案内管に挿脱されるシースの先端に、電気的に導通する一対の高周波電極が前方に向かって開閉するように設けられた内視鏡用モノポーラ型高周波鋏が用いられている(例えば、特許文献1)。 The endoscopic high-frequency incision instrument, but there is a variety of shapes depending on the intended use, in order to perform the mucosal excision surgery, the distal end of the sheath to be inserted into and removed from the treatment instrument guide tube of an endoscope, electrical a pair of endoscopic monopolar RF scissors frequency electrode is provided so as to open and close toward the front is used for continuity (for example, Patent Document 1).
特開2006−346417号公報 JP 2006-346417 JP

内視鏡用モノポーラ型高周波鋏を用いて粘膜剥離術を行う際には、予め内視鏡用高周波ナイフ等で表面が切開された粘膜の切開面に高周波鋏を差し込んでから、その電極に高周波電流を通電して、表面粘膜と筋層との間の筋等を切開する処置が行われる。 When performing an endoscopic monopolar RF scissors with mucosal dissection from plug the RF scissors cutting surface mucosal surface is incised in advance endoscopic high-frequency knife or the like, the high frequency to the electrode by passing current treatment for incising muscle, etc. between the surface mucosa and muscularis are performed.
しかし、前記のような従来の内視鏡用モノポーラ型高周波鋏では、切れ味のよい切開をしようとすると切開部分の周囲まで高周波電流による強い焼灼が行われて、周囲の生体組織を必要以上に損傷してしまう場合がある。 However, the such a conventional endoscopic monopolar RF scissors as, been made strong ablation by high frequency current and attempts to sharpness good incision to ambient incision, damage unnecessarily surrounding biological tissue there is a case in which to become. そこで、周囲の生体組織の損傷を軽くしようと電流値を下げたりすると、切開の切れ味が落ちるだけでなく、切開部位に隣接する部分の凝固が不十分になって十分な止血効果が得られずに出血してしまう場合がある。 Therefore, when lowering the current value tries lightly damage surrounding body tissue, not only the sharpness of the incision falls, a sufficient hemostatic effect can be obtained coagulation of the portion adjacent to the incision site becomes insufficient in some cases bleeding to. このように従来の内視鏡用モノポーラ型高周波鋏では、切開部分とその周囲の組織に対する焼灼の程度が不安定になる問題が生じていた。 Thus, in the conventional endoscopic monopolar RF scissors, problems degree of ablation becomes unstable incision and to tissue surrounding had occurred.

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、切れ味のよい高周波切開を行うことができ、しかも切開部分に隣接する組織を、必要以上に損傷することなく止血効果が適度に得られる程度に確実に凝固させることができる内視鏡用モノポーラ型高周波鋏を提供することを目的とする。 The present invention has been made to solve such problems, it is possible to perform sharpness good high-frequency incision, yet the tissue adjacent to the incision, moderately hemostatic effect without damaging unnecessarily it is reliably coagulated to the extent obtained and to provide a monopolar RF scissors for an endoscope which can.

本発明の内視鏡用モノポーラ型高周波鋏は、内視鏡の処置具案内管に挿脱されるシースの先端に、電気的に導通する一対の高周波電極が前方に向かって開閉するように設けられて、一対の高周波電極が閉状態のときに互いに向かい合う各高周波電極の対向位置に、電極露出面が前後方向に細長く形成され、高周波電極のその他の部分の表面は電気絶縁された構成を有する内視鏡用モノポーラ型高周波鋏において、高周波電極の長手方向に対して垂直な断面における高周波電極の断面形状が、中央部分に電極露出面が凸状に突出して、その両側に電極露出面に対して段差をなす段差部が形成され、その段差部の外縁より外側の部分は漸次外方に広がる斜面状に形成されている。 Endoscopic monopolar RF scissors of the present invention, provided at the tip of the sheath to be inserted into and removed from the treatment instrument guide tube of an endoscope, as a pair of high-frequency electrode electrically conductive to open and close toward the front is, at mutually facing position facing the high-frequency electrode when the pair of high-frequency electrode is closed, the electrode exposed surface is elongated formed in the longitudinal direction, the surface of the other portions of the high-frequency electrode having electrical insulation configurations in endoscopic monopolar RF scissors, the cross-sectional shape of the high-frequency electrode in a cross section perpendicular to the longitudinal direction of the high-frequency electrode, the electrode exposed surface to the central portion protrudes in a convex shape with respect to the electrode exposed surface on both sides Te stepped portion is formed which forms the step, the outer portion of the outer edge of the step portion is formed gradually in the tapered spreading outward.

なお、高周波電極の電極露出面以外の部分の表面に、全体に一つながりに不活性材からなる電気絶縁性コーティング皮膜が被覆されていてもよい。 Incidentally, the surface of a portion other than the electrode exposed surface of the high-frequency electrode, electrically insulating coating film comprising an inert material to one lead to overall may be coated. そして、各高周波電極の長手方向に対して垂直な断面における電極露出面の幅をW、段差部の段差の高さをh、段差面の幅をwとしたとき、W/4≦h≦W、W/4≦w≦Wであってもよく、h=W/2、w=W/2であるとより好ましい。 Each W the width of the electrode exposed surface in a cross section perpendicular to the longitudinal direction of the high-frequency electrode, when the height of the step of the stepped portion is h, and the width of the step surface and w, W / 4 ≦ h ≦ W It may be a W / 4 ≦ w ≦ W, and more preferably a h = W / 2, w = W / 2. また、高周波電極の開閉方向に対して斜面のなす角度をθとしたとき、15°≦θ≦60°であってもよく、30°≦θ≦45°であるとより好ましい。 Further, when the the angle of the slope theta with respect to the opening and closing direction of the high-frequency electrode may be a 15 ° ≦ θ ≦ 60 °, and more preferably a 30 ° ≦ θ ≦ 45 °.

本発明の内視鏡用モノポーラ型高周波鋏によれば、高周波電極の断面形状が、中央部分に電極露出面が凸状に突出して、その両側に電極露出面に対して段差をなす段差部が形成され、その段差部の外縁より外側の部分は漸次外方に広がる斜面状に形成されていることにより、切れ味のよい高周波切開を行うことができ、しかも切開部分に隣接する組織を、必要以上に損傷することなく止血効果が適度に得られる程度に確実に凝固させることができる。 According to the endoscopic monopolar RF scissors of the present invention, the cross-sectional shape of the high-frequency electrode, the electrode exposed surface to the central portion protrudes in a convex shape, the stepped portion constituting the stepped relative to the electrode exposed surface on both sides is formed, by the outer part of the outer edge of the step portion is formed gradually in the tapered spreading outward, it is possible to perform sharpness good high-frequency incision, moreover tissue, unnecessarily adjacent incision it can be reliably coagulated to the extent that the hemostatic effect can be obtained reasonably without damage to.

以下、図面を参照して本発明の実施の形態を具体的に説明する。 It will be specifically described embodiments of the present invention with reference to the drawings.
図2は本発明の第1の実施の形態の内視鏡用モノポーラ型高周波鋏の先端部分の側面断面図、図3はその平面図である。 Figure 2 is a side sectional view of a distal portion of the first embodiment of the endoscopic monopolar RF scissors of the present invention, FIG. 3 is a plan view thereof.
1は、内視鏡の処置具案内管に挿脱自在な可撓性シースであり、ステンレス線を密着巻きしたコイルパイプにより形成されている。 1 is a removably flexible sheath to the treatment instrument guide tube of an endoscope, which is formed by the coil pipe tightly wound stainless wires. 可撓性シース1の外周面には、電気絶縁性の可撓性チューブからなるシース外皮2が全長に被覆され、可撓性シース1の先端に固定的に取り付けられた先端口金3の外周にシース外皮2の先端が緊縛固定されている。 The outer peripheral surface of the flexible sheath 1, the sheath outer skin 2 made of an electrically insulating flexible tube is coated on the entire length, the distal end of the flexible sheath 1 on the outer circumference of the fixedly mounted front end cap 3 the distal end of the sheath outer skin 2 are tied fixed. 4は、可撓性シース1内に緩く挿通された導電性の操作ワイヤーであり、可撓性シース1の基端に連結された操作部からの操作により、軸方向に進退させることができ、また軸周り方向に回転させることができる。 4 is a loosely inserted through a conductive operating wire in the flexible sheath 1, by the operation of the linked operation portion to the proximal end of the flexible sheath 1, it is possible to advance and retreat in the axial direction, and it may be rotated about the axis.

5は、先端口金3に対して軸方向に移動することはできないが、軸周り方向に回転自在に先端口金3に連結された先端支持枠であり、先端支持枠5に形成されたスリット7の先端部分に、一対の高周波電極6が支軸8を中心に回動自在に前方に向かって開閉自在に支持されている。 5, can not be moved axially with respect to the distal end cap 3, a tip support frame coupled to the rotatable tip cap 3 around the axis, the slits 7 formed in the tip support frame 5 a tip portion, a pair of high-frequency electrode 6 is openably supported forward rotatably about the support shaft 8. 一対の高周波電極6は互いが電気的に導通した状態に設けられており、高周波電流は、両高周波電極6と図示されていない対極板とが共に接触する生体組織中を流れる。 A pair of high-frequency electrode 6 is provided in a state where each other is electrically conducted, the high-frequency current flows through the biological tissue to a return electrode (not shown) with both the high frequency electrode 6 is in contact together.

9は、高周波電極6を開閉駆動するための公知のリンク機構であり、操作ワイヤー4の先端がリンク機構に連結されている。 9 is a known link mechanism for opening and closing the high-frequency electrode 6, the tip of the operating wire 4 is connected to the link mechanism. その結果、操作部において操作ワイヤー4を進退操作すれば高周波電極6が支軸8を中心に開閉し、操作ワイヤー4を軸周り方向に回転操作すれば、先端支持枠5や高周波電極6等が一体となって先端口金3の軸周り方向に回転する。 As a result, the high-frequency electrode 6 is opened and closed around the support shaft 8 when advancing and retracting operation of the operation wire 4 in the operating unit, when rotating the operating wire 4 about the axis, the tip support frame 5 and the high-frequency electrode 6 and the like It rotates about the axis of the distal end cap 3 together. また、操作部側において操作ワイヤー4を高周波電源に接続することにより、操作ワイヤー4を経由して一対の高周波電極6に高周波電流を通電することができる。 Also, by connecting the operating wire 4 to a high frequency power source in the operation portion side it can be a high frequency current through the operating wire 4 to a pair of high-frequency electrode 6. 図2には、一対の高周波電極6が開いた状態が示されているが、閉じた状態も二点鎖線で図示されている。 Figure 2 is a pair of high-frequency electrode 6 is shown in an open state, are also shown closed by a two-dot chain line. なお、一対の高周波電極6の開閉駆動をリンク機構以外の機構で行ってもよい。 It is also possible to perform opening and closing driving of the pair of high frequency electrodes 6 in mechanism other than the link mechanism.

図4は一対の高周波電極6が閉じた状態の正面図(図2において左方から見た図)、図1は、高周波電極6の長手方向に対して垂直な断面の断面図(図2に示されるA−A線における断面図)である。 Figure 4 is a front view of a state in which the pair of high-frequency electrode 6 is closed (viewed from the left in FIG. 2), FIG. 1 is a sectional view of a cross section perpendicular to the longitudinal direction of the high-frequency electrode 6 (FIG. 2 is a cross-sectional view) taken along line a-a shown. また、図5は一対の高周波電極6が半開き状態の斜視図である。 Further, FIG. 5 is a pair of high-frequency electrode 6 is a perspective view of a half-open state. 各高周波電極6の最先端部分には、他方の高周波電極6側に向かって突出する先端フック部6aが、一対の高周波電極6が閉じた時に図4に示されるようにすれ違って横に並ぶ位置関係に設けられている。 The leading edge portion of each high-frequency electrode 6, the tip hook portion 6a projecting toward the other of the high-frequency electrode 6 side, the position aligned laterally pass each other as shown in FIG. 4 when the pair of high-frequency electrode 6 is closed It is provided in the relationship.

各高周波電極6には、一対の高周波電極6が閉状態のときに互いに向かい合う対向位置に電極露出面6bが前後方向に細長く形成されていて、先端フック部6aの裏面に形成された補助電極面6eとその電極露出面6bのみに金属面が露出し、高周波電極6のその他の面には例えばフッ素樹脂等のような化学的及び熱的に安定性が大きいいわゆる不活性の合成樹脂材からなる電気絶縁性コーティング皮膜10が被覆されている。 Each RF electrode 6, a pair of high-frequency electrode 6 is not the electrode exposed surface 6b to face each other opposite position when the closed state is elongated formed in the longitudinal direction, the auxiliary electrode face formed on the rear surface of the front end hook portion 6a 6e and metal surface is exposed only to the electrode exposed surface 6b, consists chemical and synthetic resin thermally stable large so-called inert, such as for example a fluorine resin other aspects of the high-frequency electrode 6 electrically insulating coating film 10 is coated. その結果、粘膜剥離処置の際に切開が必要な生体組織だけを安全に高周波切開することができる。 As a result, it is possible to safely high-frequency incision only incision required biological tissue during mucosal excision treatment. なお、電気絶縁性コーティング皮膜10部分は全図について砂目状に表示してある。 Incidentally, the electrically insulating coating film 10 portions are designated with the grained shape for all figures.

各高周波電極6の先端フック部6a以外の部分は、図1に示されるように、中央部分に電極露出面6bが凸状に突出して、その両側に電極露出面6bに対して段差をなす段差部6cが形成され、その段差部6cの外縁より外側の部分は漸次外方に広がる斜面状に形成されている(斜面部6d)。 Portion other than the distal end hook portion 6a of the high-frequency electrode 6, as shown in FIG. 1, the electrode exposed surface 6b in the central portion protrudes in a convex shape, the step forming a step difference with respect to the electrode exposed surface 6b on both sides parts 6c are formed, the outer portion of the outer edge of the step portion 6c is formed gradually in the tapered spreading outward (slope portion 6d). 電気絶縁性コーティング皮膜10は電極露出面6b以外の全面に一つながりに被覆されていて、高周波電極6を包み込む状態になっている。 The electrically insulating coating film 10 be coated on the entire surface on one connection other than the electrode exposed surface 6b, in the state wrapped around a high-frequency electrode 6.

なお、高周波電極6の長手方向に対して垂直な断面における電極露出面6bの幅をW、段差部6cの段差の高さをh、段差面の幅をw、高周波電極6の開閉方向に対して斜面部6dのなす角度をθとすると、この実施の形態においては、h=W/2、w=W/2、30°≦θ≦45°に形成されている。 Incidentally, W the width of the electrode exposed surface 6b in a cross section perpendicular to the longitudinal direction of the high-frequency electrode 6, the height of the step of the stepped portion 6c h, the width of the step surface w, relative to the opening and closing direction of the high-frequency electrode 6 When the angle of the inclined surface portion 6d theta Te, in this embodiment, are formed in the h = W / 2, w = W / 2,30 ° ≦ θ ≦ 45 °.
図6は、この実施の形態の内視鏡用モノポーラ型高周波鋏の使用状態であって、生体組織を挟んだ一対の高周波電極6に高周波電流が通電されて生体組織中を破線で示されるように高周波電流が流れる状態を略示している。 Figure 6 is a state of use of the endoscopic monopolar RF scissors of this embodiment, so that the pair of high-frequency electrode 6 sandwiching the living tissue a high-frequency current is energized is shown a biological tissue by a broken line substantially shows a state in which the high-frequency current flows through the. 生体組織を挟んでいる一対の高周波電極6間の間隔は、電極露出面6b部分が最も狭く、段差部6c部分では電極露出面6b部分に比べて急に広がって一定の間隔になり、斜面部6d部分では電極露出面6bから遠ざかるにしたがって次第に広がっていく。 The distance between the pair of high-frequency electrode 6 that sandwich the biological tissue, the most narrow electrode exposed surface 6b moiety, becomes constant intervals spread steeper than the electrode exposed surface 6b portion at the step portion 6c portion, the sloping portion in 6d parts it will progressively spread as the distance from the electrode exposed surface 6b.

その結果、高周波電流密度が最も大きい電極露出面6b部分(即ち、一対の電極露出面6bで挟まれた領域)に発生するジュール熱が最も高くなってそこで生体組織が切断され、電流密度が疎になる段差部6c部分(段差部6cで挟まれた領域)では生体組織が生焼け状態になって止血効果が得られる。 As a result, the high-frequency current density is greatest electrodes exposed surface 6b portion (i.e., a region that is sandwiched by a pair of electrodes exposed surface 6b) most raised by where body tissue Joule heat is generated in is disconnected, the current density is sparse the step portion 6c areas of (the area defined between the step portion 6c) biological tissue hemostatic effect can be obtained becomes undercooked state. そして、電極露出面6bの領域から段差部6cの領域への移行部では電流密度が急に低下していることにより、切断部と止血部との境界がハッキリして切れ味のよい切断状態が得られる。 Then, obtained by the current density at the transition from the region of the electrode exposed surface 6b to the area of ​​the step portion 6c is decreased suddenly, good disconnected boundary razor to clear the hemostasis portion and the cutting portion It is. また、一対の高周波電極6間の間隔が一定になっている段差部6cの領域においては電流密度が一定であって、その領域全体で確実に止血効果が得られる。 In the area of ​​the step portion 6c which the distance between the pair of high-frequency electrode 6 is in the constant a current density is constant, reliable hemostatic effect can be obtained in the entire region. そして、斜面部6dの領域においては生体組織を流れる電流密度が徐々に低下して生体組織の焼灼状態が段差部6cの領域から急激に変化しないので、かさぶたがボロッと剥がれるような現象が抑制されて、安定した止血状態が維持される。 Since cauterization state gradually decreases to body tissue current density flowing through the body tissue in the region of the sloping portion 6d does not change abruptly from the area of ​​the step portion 6c, phenomena such as scab peels off and Boro' is suppressed Te, stable hemostasis is maintained.

なお、このような効果を得られるh、w及びθの大きさは各々ある程度の範囲を有しており、W/4≦h≦W、W/4≦w≦W、15°≦θ≦60°の範囲にあれば、一定の優れた切れ味と止血効果を得ることができる。 Incidentally, h obtained such an effect, have each a certain range the magnitude of w and θ, W / 4 ≦ h ≦ W, W / 4 ≦ w ≦ W, 15 ° ≦ θ ≦ 60 if the range of °, it is possible to obtain the hemostatic effect constant excellent sharpness.
図7は本発明の第2の実施の形態の内視鏡用モノポーラ型高周波鋏を示しており、先端フック部6aを一対の高周波電極6の一方の先端部のみの中央位置に突出形成したものである。 Figure 7 shows a second embodiment of an endoscopic monopolar RF scissors of the present invention, a prominent member forming the distal end hook portion 6a in the center position of only one of the tip portions of the pair of high-frequency electrode 6 it is. このように、本発明においては高周波電極6の最先端部分の形状等はどのようなものであっても差し支えない。 Thus, the shape of the leading edge portion of the high-frequency electrode 6 in the present invention is no problem whatever. また、高周波電極6が湾曲した形状等であってもよい。 The high frequency electrode 6 may be a curved shape.

本発明の第1の実施の形態の内視鏡用モノポーラ型高周波鋏の図2におけるA−A線における断面図。 Sectional view taken along line A-A in Figure 2 of the endoscopic monopolar RF scissors according to the first embodiment of the present invention. 本発明の第1の実施の形態の内視鏡用モノポーラ型高周波鋏の先端部分の側面断面図。 Side cross-sectional view of a distal portion of the first embodiment of the endoscopic monopolar RF scissors of the present invention. 本発明の第1の実施の形態の内視鏡用モノポーラ型高周波鋏の先端部分の平面図。 Plan view of a distal portion of the first embodiment of the endoscopic monopolar RF scissors of the present invention. 本発明の第1の実施の形態の内視鏡用モノポーラ型高周波鋏の一対の高周波電極が閉じた状態の正面図。 A front view showing a state in which the first embodiment endoscopic monopolar RF scissor pair of high-frequency electrode of the closed of the present invention. 本発明の第1の実施の形態の内視鏡用モノポーラ型高周波鋏の高周波電極の斜視図。 Perspective view of a first embodiment endoscopic monopolar RF scissors high-frequency electrode of the present invention. 本発明の第1の実施の形態の内視鏡用モノポーラ型高周波鋏の使用状態における、高周波電流が流れる状態を示す略示図。 In the first embodiment using state of the endoscopic monopolar RF scissor embodiment of the present invention, schematic view showing a state where high-frequency current flows. 本発明の第2の実施の形態の内視鏡用モノポーラ型高周波鋏の高周波電極の斜視図。 Perspective view of a second embodiment an endoscopic monopolar RF scissors high-frequency electrode of the present invention.

符号の説明 DESCRIPTION OF SYMBOLS

1…可撓性シース6…高周波電極6a…先端フック部6b…電極露出面6c…段差部6d…斜面部10…電気絶縁性コーティング皮膜 1 ... flexible sheath 6 ... frequency electrode 6a ... distal hook portion 6b ... electrode exposed surface 6c ... step portion 6d ... inclined surface 10 ... electrically insulating coating film

Claims (6)

  1. 内視鏡の処置具案内管に挿脱されるシースの先端に、電気的に導通する一対の高周波電極が前方に向かって開閉するように設けられて、前記一対の高周波電極が閉状態のときに互いに向かい合う各高周波電極の対向位置に、電極露出面が前後方向に細長く形成され、前記高周波電極のその他の部分の表面は電気絶縁された構成を有する内視鏡用モノポーラ型高周波鋏において、 The distal end of the sheath to be inserted into and removed from the treatment instrument guide tube of an endoscope, a pair of high-frequency electrode electrically conduction provided to open and close toward the front, when the pair of the high-frequency electrodes is closed to each other facing position facing the high-frequency electrode, the electrode exposed surface is elongated formed in the longitudinal direction, the surface of the other portions of the high-frequency electrode in the endoscopic monopolar RF scissors having an electrically insulated construction,
    前記高周波電極の長手方向に対して垂直な断面における前記高周波電極の断面形状が、中央部分に前記電極露出面が凸状に突出して、その両側に前記電極露出面に対して段差をなす段差部が形成され、その段差部の外縁より外側の部分は漸次外方に広がる斜面状に形成されていることを特徴とする内視鏡用モノポーラ型高周波鋏。 The cross-sectional shape of the high-frequency electrode in a cross section perpendicular to the longitudinal direction of the high-frequency electrode, the electrode exposed surface to the central portion protrudes in a convex shape, the stepped portion forming a step with respect to the electrode exposed surface on both sides There is formed, endoscopic monopolar RF scissors, characterized in that the outer portion of the outer edge of the step portion is formed gradually in the tapered spreading outward.
  2. 請求項1に記載された内視鏡用モノポーラ型高周波鋏において、前記高周波電極の前記電極露出面以外の部分の表面に、全体に一つながりに不活性材からなる電気絶縁性コーティング皮膜が被覆されている内視鏡用モノポーラ型高周波鋏。 In endoscopic monopolar RF scissors according to claim 1, the surface of a portion other than the electrode exposed surface of the high-frequency electrode, electrically insulating coating film comprising an inert material to one lead to the whole is covered and endoscopic monopolar RF scissors are.
  3. 請求項1又は2に記載された内視鏡用モノポーラ型高周波鋏において、前記各高周波電極の長手方向に対して垂直な断面における前記電極露出面の幅をW、前記段差部の段差の高さをh、段差面の幅をwとしたとき、W/4≦h≦W、W/4≦w≦Wである内視鏡用モノポーラ型高周波鋏。 According to claim 1 or 2 has been endoscopic monopolar RF scissors described in the W the width of the electrode exposed surface in a cross section perpendicular to the longitudinal direction of the high-frequency electrode, the height of the step of the stepped portion the h, when the width of the step surface and the w, W / 4 ≦ h ≦ W, W / 4 ≦ w ≦ W endoscopic monopolar RF scissors is.
  4. 請求項3に記載された内視鏡用モノポーラ型高周波鋏において、h=W/2、w=W/2である内視鏡用モノポーラ型高周波鋏。 In endoscopic monopolar RF scissors according to claim 3, h = W / 2, w = W / 2 endoscopic monopolar RF scissors is.
  5. 請求項3又は4に記載された内視鏡用モノポーラ型高周波鋏において、前記高周波電極の開閉方向に対して前記斜面のなす角度をθとしたとき、15°≦θ≦60°である内視鏡用モノポーラ型高周波鋏。 In endoscopic monopolar RF scissors according to claim 3 or 4, when the the angle of the inclined surface with respect to the opening and closing direction of the high-frequency electrode theta, endoscope is 15 ° ≦ θ ≦ 60 ° mirror for monopolar high-frequency scissors.
  6. 請求項5に記載された内視鏡用モノポーラ型高周波鋏において、30°≦θ≦45°である内視鏡用モノポーラ型高周波鋏。 In endoscopic monopolar RF scissors according to claim 5, endoscopic monopolar RF scissors is 30 ° ≦ θ ≦ 45 °.
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