JP4459692B2 - Bipolar high-frequency treatment instrument for endoscope - Google Patents

Bipolar high-frequency treatment instrument for endoscope Download PDF

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JP4459692B2
JP4459692B2 JP2004116415A JP2004116415A JP4459692B2 JP 4459692 B2 JP4459692 B2 JP 4459692B2 JP 2004116415 A JP2004116415 A JP 2004116415A JP 2004116415 A JP2004116415 A JP 2004116415A JP 4459692 B2 JP4459692 B2 JP 4459692B2
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pair
tube
flexible sheath
treatment instrument
frequency treatment
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JP2005296304A (en
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智志 木戸岡
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Hoya Corp
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この発明は、可撓性シースの先端に互いに電気絶縁された一対の先端電極が配置された内視鏡用バイポーラ型高周波処置具に関する。   The present invention relates to a bipolar high-frequency treatment instrument for an endoscope in which a pair of tip electrodes that are electrically insulated from each other are disposed at the tip of a flexible sheath.

内視鏡用バイポーラ型高周波処置具においては、一般に、可撓性シースの先端に互いに電気絶縁された一対の先端電極が可動に配置され、その一対の先端電極を動作させるために可撓性シース内に軸線方向に進退自在に全長にわたって挿通配置された操作ワイヤが、各先端電極に高周波電流を通電するための互いに電気絶縁された一対の導線によって形成されている。即ち、一対の導線が操作ワイヤを兼用している（例えば、特許文献１、２）。
特開２００２−２５３５７０ 特開２００３−２９９６６８ In a bipolar high-frequency treatment instrument for an endoscope, generally, a pair of tip electrodes that are electrically insulated from each other are movably disposed at the tip of a flexible sheath, and the flexible sheath is used to operate the pair of tip electrodes. An operation wire, which is inserted through the entire length so as to be movable back and forth in the axial direction, is formed by a pair of electrically insulated wires for supplying a high-frequency current to each tip electrode. That is, a pair of conducting wires also serves as an operation wire (for example, Patent Documents 1 and 2).
JP 2002-253570 A JP2003-299668

図６は、上述のような従来の内視鏡用バイポーラ型高周波処置具における可撓性シース９０の軸線に対して垂直な方向の断面図であり、一対の導線９１に各々電気絶縁性の絶縁チューブ９２が被覆されているが、可撓性シース９０内はそれ以外の余裕空間１００が多きな比率を占めている。   FIG. 6 is a cross-sectional view in the direction perpendicular to the axis of the flexible sheath 90 in the conventional bipolar high-frequency treatment instrument for endoscope as described above. Although the tube 92 is covered, the flexible space 90 occupies a large proportion of the other marginal space 100.

そのため、導線９１（及びそれに被覆されている絶縁チューブ９２）が操作ワイヤとして手元側から軸線方向に押し込み操作されると、可撓性シース９０内の余裕空間１００において導線９１が蛇行することにより押し込み運動が途中で吸収されて、先端電極の作動が不十分になってしまう場合がある。   Therefore, when the conducting wire 91 (and the insulating tube 92 covered therewith) is pushed in as an operation wire in the axial direction from the hand side, the conducting wire 91 snakes in the marginal space 100 in the flexible sheath 90 due to meandering. The movement may be absorbed in the middle, and the tip electrode may become insufficiently operated.

そこで本発明は、一対の先端電極に高周波電流を通電するために可撓性シース内に挿通配置された一対の導線が操作ワイヤとして用いられる内視鏡用バイポーラ型高周波処置具において、操作ワイヤの押し込み運動が手元側から先端側によく伝達されて先端電極が良好に作動するようにすることを目的とする。   Therefore, the present invention provides a bipolar high-frequency treatment instrument for an endoscope in which a pair of conducting wires inserted and arranged in a flexible sheath is used as an operation wire in order to pass a high-frequency current to the pair of tip electrodes. An object of the present invention is to ensure that the push-in motion is well transmitted from the hand side to the tip side so that the tip electrode operates well.

上記の目的を達成するため、本発明の内視鏡用バイポーラ型高周波処置具は、可撓性シースの先端に互いに電気絶縁された一対の先端電極が可動に配置され、一対の先端電極を動作させるために可撓性シース内に軸線方向に進退自在に全長にわたって挿通配置された操作ワイヤが、各先端電極に高周波電流を通電するための互いに電気絶縁された一対の導線である内視鏡用バイポーラ型高周波処置具において、可撓性シース内に、可撓性シース内の余裕空間を埋めるための電気絶縁性のチューブ状部材からなるダミーチューブを一対の導線と並列に挿通配置して、一対の導線が基端側から進退操作されるとそれと共にダミーチューブが可撓性シース内において軸線方向に進退するようにしたものである。   In order to achieve the above object, the bipolar high-frequency treatment instrument for an endoscope of the present invention has a pair of tip electrodes electrically insulated from each other at the tip of a flexible sheath, and operates the pair of tip electrodes. In order for the endoscope, the operation wires, which are inserted through the entire length of the flexible sheath so as to be movable back and forth in the axial direction, are a pair of electrically insulated conductors for supplying a high-frequency current to each tip electrode. In the bipolar high-frequency treatment instrument, a dummy tube made of an electrically insulating tube-like member for filling an extra space in the flexible sheath is inserted and disposed in parallel with the pair of conductors in the flexible sheath. When the lead wire is advanced and retracted from the proximal end side, the dummy tube is advanced and retracted in the axial direction in the flexible sheath.

なお、一対の導線に各々電気絶縁性の絶縁チューブが被覆されていて、それと同じ絶縁チューブがダミーチューブとして用いられていてもよく、その場合には、絶縁チューブの外径寸法が可撓性シースの内径寸法の０．４１〜０．４５倍の範囲にあるとよい。   The pair of conductors may be covered with an electrically insulating insulating tube, and the same insulating tube may be used as a dummy tube. In this case, the outer diameter of the insulating tube is a flexible sheath. It is good to be in the range of 0.41 to 0.45 times the inner diameter dimension.

また、一対の導線が可撓性チューブ内の先端近傍位置において結束部材により一体的に結束されていて、ダミーチューブが、結束部材の後方位置と可撓性チューブの基端付近との間にわたって配置されていてもよい。   In addition, the pair of conductors are integrally bundled by a bundling member at a position near the distal end in the flexible tube, and the dummy tube is disposed between the rear position of the bundling member and the vicinity of the proximal end of the flexible tube. May be.

本発明によれば、可撓性シース内に、可撓性シース内の余裕空間を埋めるための電気絶縁性のチューブ状部材からなるダミーチューブを一対の導線と並列に挿通配置して、一対の導線が基端側から進退操作されるとそれと共にダミーチューブが可撓性シース内において軸線方向に進退するようにしたことにより、操作ワイヤの押し込み運動が可撓性シース内において吸収されずに手元側から先端側によく伝達されて先端電極が良好に作動する。   According to the present invention, a dummy tube made of an electrically insulating tube-like member for filling a margin space in the flexible sheath is inserted and arranged in parallel with the pair of conductors in the flexible sheath, When the lead wire is moved back and forth from the proximal end side, the dummy tube is moved back and forth in the axial direction in the flexible sheath, so that the push-in motion of the operation wire is not absorbed in the flexible sheath and is close to the hand. The tip electrode works well with good transmission from the side to the tip side.

可撓性シースの先端に互いに電気絶縁された一対の先端電極が可動に配置され、一対の先端電極を動作させるために可撓性シース内に軸線方向に進退自在に全長にわたって挿通配置された操作ワイヤが、各先端電極に高周波電流を通電するための互いに電気絶縁された一対の導線である内視鏡用バイポーラ型高周波処置具において、可撓性シース内に、可撓性シース内の余裕空間を埋めるための電気絶縁性のチューブ状部材からなるダミーチューブを一対の導線と並列に挿通配置して、一対の導線が基端側から進退操作されるとそれと共にダミーチューブが可撓性シース内において軸線方向に進退するようにする。   A pair of tip electrodes that are electrically insulated from each other are movably disposed at the tip of the flexible sheath, and are inserted through the entire length of the flexible sheath so as to be able to advance and retract in the axial direction in order to operate the pair of tip electrodes. In a bipolar high-frequency treatment instrument for an endoscope, in which a wire is a pair of electrically insulated conductors for supplying a high-frequency current to each tip electrode, an extra space in the flexible sheath is provided in the flexible sheath. A dummy tube made of an electrically insulating tube-like member is embedded in parallel with the pair of conductors, and when the pair of conductors is advanced and retracted from the proximal end, the dummy tube is moved into the flexible sheath. In the direction of the axis, it is advanced and retracted.

図面を参照して本発明の実施例を説明する。
図２は内視鏡用バイポーラ型高周波処置具の全体構成を示し、図３はその先端近傍の構成を示している。 Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 shows the entire configuration of the bipolar high-frequency treatment instrument for endoscope, and FIG. 3 shows the configuration near the tip.

１は、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自在な例えば四フッ化エチレン樹脂チューブ等によって形成された電気絶縁性の可撓性シースであり、その先端部分には、例えばセラミックスや耐熱プラスチック等からなる電気絶縁性の先端支持本体２が取着されている。   Reference numeral 1 denotes an electrically insulating flexible sheath formed by, for example, an ethylene tetrafluoride resin tube that can be inserted into and removed from a treatment instrument insertion channel of an endoscope (not shown). An electrically insulating tip support body 2 made of ceramics, heat resistant plastic or the like is attached.

先端支持本体２の先端部分には、導電性の例えばステンレス鋼等からなる一対の嘴状の先端電極３Ａ，３Ｂが、図３に示されるように、互いに電気絶縁された状態で各々支軸４Ａ，４Ｂを中心に回動自在に取り付けられている。   A pair of bowl-shaped tip electrodes 3A and 3B made of, for example, stainless steel or the like, which are electrically conductive, for example, are electrically insulated from each other as shown in FIG. , 4B are attached to be rotatable.

そして、各先端電極３Ａ，３Ｂから一体的に支軸４Ａ，４Ｂの後方に延出するように形成されたアーム５Ａ，５Ｂが、先端支持本体２に形成されているスリット２ａ内に配置されていて、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一対の導線６Ａ，６Ｂの先端がアーム５Ａ，５Ｂに連結されている。   The arms 5A, 5B formed so as to extend integrally from the respective tip electrodes 3A, 3B to the rear of the support shafts 4A, 4B are disposed in the slits 2a formed in the tip support body 2. Thus, the distal ends of a pair of conducting wires 6A and 6B that are inserted into the flexible sheath 1 so as to be movable back and forth in the axial direction are connected to the arms 5A and 5B.

図２に示されるように、可撓性シース１の手元側基端部に連結された操作部２０においては、操作部本体２１にスライド自在に取り付けられている可動指掛け２２に、図示されていない高周波電源コードを接続するための正負二極方式の接続端子２３が配置され、その接続端子２３に一対の導線６Ａ，６Ｂの基端が連結されている。   As shown in FIG. 2, the operation unit 20 connected to the proximal side proximal end of the flexible sheath 1 is not shown in the movable finger hook 22 slidably attached to the operation unit main body 21. A positive / negative bipolar type connection terminal 23 for connecting the high-frequency power cord is disposed, and the base ends of the pair of conductors 6A and 6B are connected to the connection terminal 23.

そのような構成により、可動指掛け２２を進退操作することによって導線６Ａ，６Ｂが可撓性シース１内で進退動作をし、それによって先端電極３Ａ，３Ｂが嘴状に開閉する。図３には、先端電極３Ａ，３Ｂが開いた状態が二点鎖線で図示されている。   With such a configuration, the lead wires 6A and 6B move back and forth within the flexible sheath 1 by moving the movable finger 22 forward and backward, thereby opening and closing the tip electrodes 3A and 3B in a hook shape. In FIG. 3, a state in which the tip electrodes 3A and 3B are opened is shown by a two-dot chain line.

このように一対の導線６Ａ，６Ｂが先端電極３Ａ，３Ｂを開閉駆動するための操作ワイヤを兼用しているが、接続端子２３から一対の導線６Ａ，６Ｂを経由して各先端電極３Ａ，３Ｂに高周波電流を漏洩なく通電することができるよう、一対の導線６Ａ，６Ｂは互いに電気絶縁された状態で先端電極３Ａ，３Ｂに接続されている。   In this way, the pair of conductors 6A and 6B also serves as an operation wire for opening and closing the tip electrodes 3A and 3B. However, the tip electrodes 3A and 3B are connected from the connection terminal 23 via the pair of conductors 6A and 6B. The pair of conductors 6A and 6B are connected to the tip electrodes 3A and 3B in a state of being electrically insulated from each other so that a high-frequency current can be supplied without leakage.

図３に示される７Ａ１と７Ａ２は、一方の導線６Ａに被覆された電気絶縁性の絶縁チューブ、７Ｂ１と７Ｂ２は、他方の導線６Ｂに被覆された電気絶縁性の絶縁チューブであり、一方の導線６Ａと他方の導線６Ｂとが直接接触しないようにしてある。   3A1 and 7A2 shown in FIG. 3 are electrically insulating insulating tubes covered with one conducting wire 6A, and 7B1 and 7B2 are electrically insulating insulating tubes covered with the other conducting wire 6B. 6A and the other conducting wire 6B are not in direct contact with each other.

また、一対の導線６Ａ，６Ｂは先端近傍において絶縁チューブ７Ａ１，７Ｂ１と共に電気絶縁性の部材からなる結束部材８により結束されており、その結束部材８には、一対の導線６Ａ，６Ｂが通過する一対の平行な貫通孔９Ａ，９Ｂが軸線方向に形成されている。   The pair of conductors 6A and 6B are bundled together with insulating tubes 7A1 and 7B1 in the vicinity of the distal end by a bundling member 8 made of an electrically insulating member, and the pair of conductors 6A and 6B pass through the bundling member 8. A pair of parallel through holes 9A and 9B are formed in the axial direction.

そして、結束部材８の先側に隣接する側では、一対の導線６Ａ，６Ｂの中の一方の導線６Ａのみに絶縁チューブ７Ａ１が被覆されていて、それと並んで配置されている他方の導線６Ｂは可撓性シース１内において剥き出しである。   Then, on the side adjacent to the front side of the binding member 8, only one of the pair of conductors 6A and 6B is covered with the insulating tube 7A1, and the other conductor 6B arranged side by side is covered with the insulating tube 7A1. It is exposed in the flexible sheath 1.

また、結束部材８の後側に隣接する側では他方の導線６Ｂのみに絶縁チューブ７Ｂ１が被覆されていて、それと並んで配置されている一方の導線６Ａは可撓性シース１内において剥き出しである。   In addition, on the side adjacent to the rear side of the binding member 8, only the other conductor 6 </ b> B is covered with the insulating tube 7 </ b> B <b> 1, and the one conductor 6 </ b> A arranged side by side is exposed in the flexible sheath 1. .

そのように、結束部材８の前側において一方の導線６Ａに被覆されている絶縁チューブ７Ａ１と、結束部材８の後側において他方の導線６Ｂに被覆されている絶縁チューブ７Ｂ１とを、各々貫通孔９Ａ，９Ｂの途中位置まで差し込めるように、各貫通孔９Ａ，９Ｂには太径部１０Ａ，１０Ｂが形成されている。   In this way, the insulating tube 7A1 covered with the one conducting wire 6A on the front side of the binding member 8 and the insulating tube 7B1 covered with the other conducting wire 6B on the rear side of the binding member 8 are respectively connected to the through holes 9A. , 9B, large diameter portions 10A, 10B are formed in the respective through holes 9A, 9B.

そして、各太径部１０Ａ，１０Ｂ内においては、絶縁チューブ７Ａ１，７Ｂ１が結束部材８に接着固定され、貫通孔９Ａ，９Ｂのその他の部分内においては、導線６Ａ，６Ｂが結束部材８に直接接着固定されている。   In each of the large diameter portions 10A and 10B, the insulating tubes 7A1 and 7B1 are bonded and fixed to the binding member 8, and in the other portions of the through holes 9A and 9B, the conductive wires 6A and 6B are directly connected to the binding member 8. Bonded and fixed.

したがって、極めて容易な組み立て作業により、各導線６Ａ，６Ｂと絶縁チューブ７Ａ１，７Ｂ１とを各々結束部材８に対して確実に接着固定することができ、操作ワイヤとしての一対の導線６Ａ，６Ｂを、先端部分において動きがバラバラにならないように均一に進退させることができる。   Therefore, the conducting wires 6A and 6B and the insulating tubes 7A1 and 7B1 can be reliably bonded and fixed to the binding member 8 by an extremely easy assembly operation, and a pair of conducting wires 6A and 6B as operation wires can be obtained. It is possible to advance and retreat uniformly so that the movement does not fall apart at the tip portion.

また、結束部材８より後方において一対の導線６Ａ，６Ｂどうしの電気絶縁状態を確保するために、各導線６Ａ，６Ｂには各々操作部２０に至る長い絶縁チューブ７Ａ２，７Ｂ２が被覆されている。   Further, in order to ensure the electrical insulation between the pair of conductors 6A and 6B behind the binding member 8, the conductors 6A and 6B are covered with long insulating tubes 7A2 and 7B2 that reach the operation unit 20, respectively.

ただし、可撓性シース１が屈曲したときに操作部２０に至る絶縁チューブ７Ａ２，７Ｂ２と導線６Ａ，６Ｂとの間に滑りが生じることを考慮して、操作部２０に至る絶縁チューブ７Ａ２，７Ｂ２の先端面と結束部材８の後端面（及び結束部材８の後側に固着されている絶縁チューブ７Ｂ１の後端面）との間には、軸線方向に各々数ｍｍ程度の隙間をあけてある。   However, the insulating tubes 7A2, 7B2 reaching the operation unit 20 are considered in consideration of slippage between the insulation tubes 7A2, 7B2 reaching the operation unit 20 and the conducting wires 6A, 6B when the flexible sheath 1 is bent. A gap of about several millimeters is formed in the axial direction between the front end surface of the binding member 8 and the rear end surface of the binding member 8 (and the rear end surface of the insulating tube 7B1 fixed to the rear side of the binding member 8).

また、さらに可撓性シース１内には、結束部材８の後方位置と可撓性シース１の基端付近との間の範囲に、図３におけるＩ−Ｉ断面を図示する図１にも示されるように、可撓性シース１内の余裕空間１００を埋めるための電気絶縁性のチューブ状部材からなるダミーチューブ１７が、一対の導線６Ａ，６Ｂと並列に挿通配置されている。   Further, in the flexible sheath 1, it is also shown in FIG. 1 illustrating a cross section taken along line II in FIG. 3 in a range between the rear position of the binding member 8 and the vicinity of the proximal end of the flexible sheath 1. As shown, a dummy tube 17 made of an electrically insulating tube-shaped member for filling the marginal space 100 in the flexible sheath 1 is inserted and arranged in parallel with the pair of conductors 6A and 6B.

この実施例のダミーチューブ１７としては、各導線６Ａ，６Ｂに被覆されている絶縁チューブ７Ａ２，７Ｂ２と同じ絶縁チューブが用いられていて、適宜の位置で（例えば、ダミーチューブ１７の両端部付近と適宜の中間位置、或いはダミーチューブ１７の全長にわたって）それらが互いに接着固定されている。   As the dummy tube 17 of this embodiment, the same insulating tube as the insulating tubes 7A2 and 7B2 covered with the conducting wires 6A and 6B is used, and at an appropriate position (for example, near both ends of the dummy tube 17) They are fixedly bonded to each other (appropriate intermediate position or over the entire length of the dummy tube 17).

そのようなダミーチューブ１７及び絶縁チューブ７Ａ２，７Ｂ２の外径寸法は、可撓性シース１の内径寸法の０．４１〜０．４５倍の範囲に設定されており、図１には、０．４３倍の場合が図示されている。   The outer diameters of the dummy tube 17 and the insulating tubes 7A2 and 7B2 are set in a range of 0.41 to 0.45 times the inner diameter of the flexible sheath 1, and FIG. The case of 43 times is shown.

ちなみに、図４と図５は０．４０倍と０．４６倍の場合を図示しており、０．４０倍以下では余裕空間１００が大き過ぎて導線６Ａ，６Ｂの進退動作に蛇行が発生し、０．４６倍以上では余裕空間１００が小さすぎて導線６Ａ，６Ｂがスムーズに進退しなくなるので、０．４１〜０．４５倍の範囲が好ましい。   Incidentally, FIGS. 4 and 5 show the cases of 0.40 times and 0.46 times. Below 0.40 times, the margin space 100 is too large, and the conductors 6A and 6B meander in the forward and backward movement. If it is 0.46 times or more, the marginal space 100 is too small, and the conducting wires 6A and 6B do not advance and retreat smoothly. Therefore, the range of 0.41 to 0.45 times is preferable.

このような構成により、一対の導線６Ａ，６Ｂが操作部２０側から進退操作されるとそれと共にダミーチューブ１７が可撓性シース１内において殆ど蛇行せずに軸線方向にスムーズに進退して、操作ワイヤとしての一対の導線６Ａ，６Ｂの押し込み運動が手元側から先端側によく伝達され、先端電極３Ａ，３Ｂが良好に作動する。   With such a configuration, when the pair of conductors 6A and 6B is operated to advance and retract from the operation unit 20 side, the dummy tube 17 smoothly advances and retracts in the axial direction with almost no meandering in the flexible sheath 1, The pushing motion of the pair of conducting wires 6A and 6B as the operation wires is well transmitted from the hand side to the tip side, and the tip electrodes 3A and 3B operate well.

なお、本発明は上記実施例に限定されるものではなく、例えばダミーチューブ１７は絶縁チューブ７Ａ２，７Ｂ２とサイズが相違するチューブであってもよく、ダミーチューブ１７が可撓性シース１内に２本以上挿通配置されていてもよい。   The present invention is not limited to the above embodiment. For example, the dummy tube 17 may be a tube having a size different from that of the insulating tubes 7A2 and 7B2, and the dummy tube 17 is placed in the flexible sheath 1. More than this may be inserted.

本発明の実施例の内視鏡用バイポーラ型高周波処置具の図３におけるＩ−Ｉ断面図である。It is II sectional drawing in FIG. 3 of the bipolar type high frequency treatment tool for endoscopes of the Example of this invention. 本発明の実施例の内視鏡用バイポーラ型高周波処置具の全体構成を示す側面図である。1 is a side view showing an overall configuration of an endoscope bipolar high-frequency treatment instrument according to an embodiment of the present invention. 本発明の実施例の内視鏡用バイポーラ型高周波処置具の先端付近の側面断面図である。It is side surface sectional drawing of the tip vicinity of the bipolar type high frequency treatment tool for endoscopes of the Example of this invention. 本発明の内視鏡用バイポーラ型高周波処置具の発明の範囲の圏外例を示す図３におけるＩ−Ｉ断面図に対応する断面図である。It is sectional drawing corresponding to II sectional drawing in FIG. 3 which shows the out-of-range example of the range of invention of the bipolar type high frequency treatment tool for endoscopes of this invention. 本発明の内視鏡用バイポーラ型高周波処置具の発明の範囲の圏外例を示す図３におけるＩ−Ｉ断面図に対応する断面図である。It is sectional drawing corresponding to II sectional drawing in FIG. 3 which shows the out-of-range example of the range of invention of the bipolar type high frequency treatment tool for endoscopes of this invention. 従来の内視鏡用バイポーラ型高周波処置具の軸線に対して垂直な断面における断面図である。It is sectional drawing in a cross section perpendicular | vertical with respect to the axis line of the conventional bipolar type high frequency treatment tool for endoscopes.

符号の説明Explanation of symbols

１ 可撓性シース
３Ａ，３Ｂ 先端電極
６Ａ，６Ｂ 導線
７Ａ２，７Ｂ２ 操作部に至る絶縁チューブ
８ 結束部材
１７ ダミーチューブ
１００ 余裕空間 DESCRIPTION OF SYMBOLS 1 Flexible sheath 3A, 3B Tip electrode 6A, 6B Conductor 7A2, 7B2 Insulation tube which reaches an operation part 8 Bundling member 17 Dummy tube 100 Margin space

Claims (4)

可撓性シースの先端に互いに電気絶縁された一対の先端電極が可動に配置され、上記一対の先端電極を動作させるために上記可撓性シース内に軸線方向に進退自在に全長にわたって挿通配置された操作ワイヤが、上記各先端電極に高周波電流を通電するための互いに電気絶縁された一対の導線である内視鏡用バイポーラ型高周波処置具において、
上記可撓性シース内に、上記可撓性シース内の余裕空間を埋めるための電気絶縁性のチューブ状部材からなるダミーチューブを上記一対の導線と並列に挿通配置して、上記一対の導線が基端側から進退操作されるとそれと共に上記ダミーチューブが上記可撓性シース内において軸線方向に進退するようにしたことを特徴とする内視鏡用バイポーラ型高周波処置具。 A pair of tip electrodes, which are electrically insulated from each other, are movably disposed at the tip of the flexible sheath, and are inserted through the entire length of the flexible sheath so as to be movable back and forth in the axial direction in order to operate the pair of tip electrodes. In the bipolar high-frequency treatment instrument for endoscope, in which the operation wire is a pair of conductive wires electrically insulated from each other for supplying a high-frequency current to each tip electrode,
In the flexible sheath, a dummy tube made of an electrically insulating tube-like member for filling a margin space in the flexible sheath is inserted and arranged in parallel with the pair of conductors, and the pair of conductors is A bipolar high-frequency treatment instrument for an endoscope, wherein when the advancing / retreating operation is performed from the proximal end side, the dummy tube is advanced / retreated in the axial direction in the flexible sheath. 上記一対の導線に各々電気絶縁性の絶縁チューブが被覆されていて、それと同じ絶縁チューブが上記ダミーチューブとして用いられている請求項１記載の内視鏡用バイポーラ型高周波処置具。 The bipolar high-frequency treatment instrument for an endoscope according to claim 1, wherein the pair of conductive wires are each covered with an electrically insulating insulating tube, and the same insulating tube is used as the dummy tube. 上記絶縁チューブの外径寸法が上記可撓性シースの内径寸法の０．４１〜０．４５倍の範囲にある請求項２記載の内視鏡用バイポーラ型高周波処置具。 The bipolar high-frequency treatment instrument for endoscope according to claim 2, wherein the outer diameter of the insulating tube is in the range of 0.41 to 0.45 times the inner diameter of the flexible sheath. 上記一対の導線が上記可撓性チューブ内の先端近傍位置において結束部材により一体的に結束されていて、上記ダミーチューブが、上記結束部材の後方位置と上記可撓性チューブの基端付近との間にわたって配置されている請求項１、２又は３記載の内視鏡用バイポーラ型高周波処置具。 The pair of conductive wires are integrally bound by a binding member at a position in the vicinity of the distal end in the flexible tube, and the dummy tube is located between the rear position of the binding member and the vicinity of the proximal end of the flexible tube. The bipolar high-frequency treatment instrument for an endoscope according to claim 1, 2 or 3, which is disposed between the two.
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JP6616498B2 (en) 2016-04-28 2019-12-04 オリンパス株式会社 Sheath and manipulator for flexible manipulator

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