JP4618880B2 - Endoscopic biopsy forceps for endoscope - Google Patents

Endoscopic biopsy forceps for endoscope Download PDF

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Publication number
JP4618880B2
JP4618880B2 JP2000392585A JP2000392585A JP4618880B2 JP 4618880 B2 JP4618880 B2 JP 4618880B2 JP 2000392585 A JP2000392585 A JP 2000392585A JP 2000392585 A JP2000392585 A JP 2000392585A JP 4618880 B2 JP4618880 B2 JP 4618880B2
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Prior art keywords
forceps
endoscope
pair
cup
cups
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Expired - Fee Related
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JP2002191606A (en
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輝雄 大内
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Hoya Corp
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Hoya Corp
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Description

【０００１】
【発明の属する技術分野】
この発明は、鉗子カップの縁部が鋸歯状に形成された内視鏡用鰐口型生検鉗子に関する。
【０００２】
【従来の技術】
内視鏡用生検鉗子は一般に、内視鏡の鉗子チャンネルに挿脱されるシース内に挿通配置された操作ワイヤを軸線方向に進退操作することによって、シースの先端に配置された一対の鉗子カップを嘴状に開閉駆動するようになっている。
【０００３】
そして鰐口型の生検鉗子の場合は、標本の採取対象である粘膜面に鉗子カップがよく食いつくように、鉗子カップの縁部が鋸歯状に形成されている。
【０００４】
【発明が解決しようとする課題】
生検組織を採取する際には、操作ワイヤを手元側に牽引して一対の鉗子カップを閉じることにより、各鉗子カップの縁部で粘膜面が切断され、閉じた一対の鉗子カップ内に組織標本が採取される。
【０００５】
しかし、上述のような従来の内視鏡用鰐口型生検鉗子の場合には、各鉗子カップの鋸歯状の歯の歯先が粘膜面によく突き刺さるものの、それは位置的に飛び飛びになっているので、粘膜面がスムーズに切断される状態にはなり難く、粘膜面から組織標本を引きちぎった状態になりがちで、必要以上の出血を伴う場合があった。
【０００６】
そこで本発明は、鉗子カップの縁部に形成された鋸歯状の歯が粘膜面によく食いつくだけでなく、粘膜面から組織標本をスムーズに切り取って、少ない出血で採取することができる内視鏡用鰐口型生検鉗子を提供することを目的とする。
【０００７】
【課題を解決するための手段】
上記の目的を達成するため、本発明の内視鏡用鰐口型生検鉗子は、嘴状に開閉する一対の鉗子カップのうち少なくとも一方の鉗子カップの縁部が鋸歯状に形成された内視鏡用鰐口型生検鉗子において、一対の鉗子カップが閉じる際に、双方の縁部どうしがすれ違ってから閉じきるように構成したものである。
【０００８】
なお、一対の鉗子カップが閉じる際に、双方の縁部どうしが角度をもってすれ違うようにすると、粘膜面をよりスムーズに切断することができる。
その場合、一対の鉗子カップが双方とも鋸歯状に形成されていて、一方の鉗子カップの歯先の位置と他方の鉗子カップの歯先の位置とが相互にずれていてもよく、一対の鉗子カップが双方とも鋸歯状に形成されていて、あい対向する位置において双方の歯の斜面の角度が相違していてもよく、或いは、一対の鉗子カップのうち一方の鉗子カップの縁部が平刃状に形成されていてもよい。
【０００９】
【発明の実施の形態】
図面を参照して本発明の参考例と実施例を説明する。
図３は、内視鏡用鰐口型生検鉗子を示しており、図示されていない内視鏡の鉗子チャンネルに挿脱される可撓性シース２は例えば密着巻きコイルパイプからなり、その内部には、軸線方向に進退自在に操作ワイヤ３が全長にわたって挿通配置されている。
【００１０】
可撓性シース２の基端（手元側）には、操作ワイヤ３を進退操作させるための操作部１０が連結されており、可撓性シース２の先端には、操作ワイヤ３によって開閉駆動される一対の鉗子カップ１が配置されている。
【００１１】
図１及び図２は内視鏡用鰐口型生検鉗子の先端部分を示しており、可撓性シース２の先端に固着された先端支持枠４に、縁部が鋸歯状に形成された一対の鉗子カップ１が、支持軸５を中心に嘴状に開閉するように支持されている。この参考例の一対の鉗子カップ１は、閉じる際に双方の縁部の歯先と歯底とがあい対向するように組み合わせられている。
【００１２】
操作ワイヤ３と鉗子カップ１との間にはパンタグラフ状のリンク機構６が配置されており、リンク機構６の後端部に配置されたワイヤ接続ロッド７に、操作ワイヤ３の先端部分が後方から連結固着されている。
【００１３】
その結果、操作部１０において操作ワイヤ３を進退操作することにより、ワイヤ接続ロッド７が軸線方向に進退して、操作ワイヤ３の進退動作を鉗子カップ１の開閉動作に変換するようにリンク機構６が動作し、図１及び図２に示されるように、一対の鉗子カップ１が嘴状に開閉駆動される。
【００１４】
そして、一対の鉗子カップ１が閉じた状態では、図１におけるIV−IV断面を図示する図４にも示されるとおり、一方の鉗子カップ１ａの縁部の内側に他方の鉗子カップ１ｂの縁部が摺接する状態で入り込むように、一対の鉗子カップ１の大きさに差が設けられている。図４に示される９は、鉗子カップ１の背部に形成された孔である。
【００１５】
その結果、操作ワイヤ３が牽引されて一対の鉗子カップ１が閉じる際には、双方の鉗子カップ１の縁部どうしが摺接しながらすれ違い、それから閉じきった状態になる。
【００１６】
したがって、一対の鉗子カップ１が閉じていく動作において双方の縁部に形成された鋸歯状の歯先が粘膜面によく食い込むと共に、一対の鉗子カップ１の縁部どうしが摺接しながらすれ違う際に、標本組織が粘膜面からスムーズに切断されて鉗子カップ１内に採取される。
【００１７】
図５は、本発明の第２の参考例の内視鏡用鰐口型生検鉗子の一対の鉗子カップ１が閉じた状態を示しており、この参考例においては、一対の鉗子カップ１の縁部の歯先と歯先どうし、及び歯底と歯底どうしがあい対向するように形成されている。
【００１８】
このように構成された鉗子カップ１が閉じる際には、双方の鉗子カップ１の縁部どうしが平行な状態ですれ違うのでなく、図６に示されるように角度（鈍角、鋭角又は直角）をもってすれ違うので、粘膜面がよりスムーズに切断される。
【００１９】
同様の作用効果は、図７に示される第３の参考例のように、双方ともに縁部が鋸歯状に形成された一対の鉗子カップ１の、一方の鉗子カップ１ａの歯先の位置と他方の鉗子カップ１ｂの歯先の位置とを偏位させてもよく、図８に示される第４の参考例のように、あい対向する位置において双方の歯の斜面の角度を相違させてもよい。
【００２０】
また、図９に示される実施例のように、一方の鉗子カップ１ｂの縁部を平刃状に形成しても、同様の作用効果を得ることができる。
【００２１】
【発明の効果】
本発明によれば、縁部が鋸歯状に形成された鉗子カップが閉じる際に、双方の鉗子カップの縁部どうしがすれ違ってから閉じきるように構成したことにより、鉗子カップの縁部に形成された鋸歯状の歯が粘膜面によく食いつくだけでなく、粘膜面から組織標本をスムーズに切り取って、少ない出血で安全かつ確実に採取することができる。
【図面の簡単な説明】
【図１】 本発明の第１の参考例の内視鏡用鰐口型生検鉗子の先端部分の鉗子カップが閉じきった状態の側面略示断面図である。
【図２】 本発明の第１の参考例の内視鏡用鰐口型生検鉗子の先端部分の鉗子カップが開いた状態の側面略示断面図である。
【図３】 本発明の第１の参考例の内視鏡用鰐口型生検鉗子の全体構成を示す側面図である。
【図４】 本発明の第１の参考例の内視鏡用鰐口型生検鉗子の図１におけるIV−IV断面図である。
【図５】 本発明の第２の参考例の内視鏡用鰐口型生検鉗子の先端部分の鉗子カップが閉じきった状態の側面略示断面図である。
【図６】 本発明の第２の参考例の内視鏡用鰐口型生検鉗子の鉗子カップの歯と歯がすれ違う状態の側面図である。
【図７】 本発明の第３の参考例の内視鏡用鰐口型生検鉗子の先端部分の鉗子カップが閉じきった状態の側面略示断面図である。
【図８】 本発明の第４の参考例の内視鏡用鰐口型生検鉗子の先端部分の鉗子カップが閉じきった状態の側面略示断面図である。
【図９】 本発明の実施例の内視鏡用鰐口型生検鉗子の先端部分の鉗子カップが閉じきった状態の側面略示断面図である。
【符号の説明】
１ 鉗子カップ
２ 可撓性シース
３ 操作ワイヤ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscopic biopsy forceps for an endoscope in which an edge of a forceps cup is formed in a sawtooth shape.
[0002]
[Prior art]
An endoscopic biopsy forceps is generally a pair of forceps arranged at the distal end of a sheath by operating an operation wire inserted and removed in a sheath inserted into and removed from the forceps channel of the endoscope in the axial direction. The cup is driven to open and close like a bowl.
[0003]
In the case of the biopsy forceps of the mouth opening type, the edge of the forceps cup is formed in a sawtooth shape so that the forceps cup bites well on the mucosal surface from which the specimen is collected.
[0004]
[Problems to be solved by the invention]
When collecting a biopsy tissue, the operation wire is pulled toward the proximal side to close the pair of forceps cups, whereby the mucosal surface is cut at the edge of each forceps cup, and the tissue is placed in the closed pair of forceps cups. A sample is taken.
[0005]
However, in the case of the conventional endoscope mouth biopsy forceps as described above, the tooth tips of each forceps cup pierce the mucosal surface well, but it is jumped in position. Therefore, the mucosal surface is unlikely to be cut smoothly, and the tissue sample tends to be torn off from the mucosal surface, which may be accompanied by more bleeding than necessary.
[0006]
Therefore, the present invention provides an endoscope in which not only the serrated teeth formed on the edge of the forceps cup bite the mucosal surface well, but also a tissue sample can be smoothly cut from the mucosal surface and collected with less bleeding. An object of the present invention is to provide an incision-type biopsy forceps for use.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the endoscope biopsy forceps for endoscope according to the present invention is an endoscope in which the edge of at least one forceps cup of a pair of forceps cups that opens and closes in a hook shape is formed in a sawtooth shape. The mirror mouth biopsy forceps for a mirror is configured such that when a pair of forceps cups closes, the edges of both ends pass each other before closing.
[0008]
When the pair of forceps cups are closed, the mucosal surface can be cut more smoothly if the edges of the two sides are passed with each other at an angle.
In that case, both of the pair of forceps cups are formed in a sawtooth shape, and the position of the tooth tip of one forceps cup and the position of the tooth tip of the other forceps cup may be shifted from each other. Both cups are formed in a sawtooth shape, and the angle of the slopes of both teeth may be different at opposite positions, or the edge of one forceps cup of a pair of forceps cups is a flat blade It may be formed in a shape.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Reference examples and examples of the present invention will be described with reference to the drawings.
FIG. 3 shows an endoscope incision-type biopsy forceps, and a flexible sheath 2 to be inserted into and removed from an endoscope forceps channel (not shown) is formed of, for example, a tightly wound coil pipe, The operation wire 3 is inserted through the entire length so as to freely advance and retract in the axial direction.
[0010]
An operation unit 10 for moving the operation wire 3 forward and backward is connected to the proximal end (hand side) of the flexible sheath 2, and the distal end of the flexible sheath 2 is driven to open and close by the operation wire 3. A pair of forceps cups 1 are arranged.
[0011]
FIGS. 1 and 2 show the distal end portion of the endoscope biopsy forceps for endoscope, and a pair of edge portions formed in a sawtooth shape on the distal end support frame 4 fixed to the distal end of the flexible sheath 2. The forceps cup 1 is supported so as to open and close like a bowl around the support shaft 5. The pair of forceps cups 1 of this reference example are combined so that the tooth tips and the tooth bottoms of both edges face each other when they are closed.
[0012]
A pantograph-like link mechanism 6 is disposed between the operation wire 3 and the forceps cup 1, and the distal end portion of the operation wire 3 is connected to the wire connecting rod 7 disposed at the rear end portion of the link mechanism 6 from the rear. Connected and fixed.
[0013]
As a result, when the operation wire 3 is advanced / retreated in the operation unit 10, the wire connecting rod 7 is advanced / retreated in the axial direction, and the link mechanism 6 is configured to convert the advance / retreat operation of the operation wire 3 into the opening / closing operation of the forceps cup 1. As shown in FIGS. 1 and 2, the pair of forceps cups 1 is opened and closed in a hook shape.
[0014]
When the pair of forceps cups 1 is closed, as shown in FIG. 4 illustrating the IV-IV cross section in FIG. 1, the edge of the other forceps cup 1b is inside the edge of one forceps cup 1a. A difference is provided in the size of the pair of forceps cups 1 so as to enter in a state of sliding contact. 4 is a hole formed in the back of the forceps cup 1.
[0015]
As a result, when the operation wire 3 is pulled and the pair of forceps cups 1 is closed, the edges of both forceps cups 1 pass while sliding, and then the state is completely closed.
[0016]
Therefore, when the pair of forceps cups 1 is closed, the serrated tooth tips formed on both edges bite into the mucous membrane surface, and the edges of the pair of forceps cups 1 pass each other while sliding. The specimen tissue is cut smoothly from the mucosal surface and collected in the forceps cup 1.
[0017]
FIG. 5 shows a state where the pair of forceps cups 1 of the endoscope biopsy forceps for endoscope of the second reference example of the present invention is closed. In this reference example, the edges of the pair of forceps cups 1 are shown. The tooth tip and the tooth tip of the part, and the tooth bottom and the tooth bottom are formed to face each other.
[0018]
When the thus configured forceps cup 1 is closed, the edges of both forceps cups 1 do not pass each other in a parallel state, but pass each other at an angle (obtuse angle, acute angle, or right angle) as shown in FIG. Therefore, the mucous membrane surface is cut more smoothly.
[0019]
As in the third reference example shown in FIG. 7, the same effect is achieved by the position of the tooth tip of one forceps cup 1 a and the other of the pair of forceps cups 1 whose edges are both formed in a sawtooth shape. The position of the tooth tip of the forceps cup 1b may be deviated, and as in the fourth reference example shown in FIG. 8, the angles of the inclined surfaces of both teeth may be made different at opposite positions. .
[0020]
Further, as the real施例that shown in Figure 9, be formed edge of one forcep cup 1b in flat blade shape, it is possible to obtain the same effect.
[0021]
【The invention's effect】
According to the present invention, when the forceps cup having a serrated edge is closed, the edges of both forceps cups are closed after passing each other, thereby forming the edge of the forceps cup. Not only do the serrated teeth bite well on the mucosal surface, but also a tissue specimen can be cut out smoothly from the mucosal surface and collected safely and reliably with less bleeding.
[Brief description of the drawings]
FIG. 1 is a schematic side sectional view showing a state in which a forceps cup at a distal end portion of an endoscopic biopsy forceps for endoscope according to a first reference example of the present invention is completely closed.
FIG. 2 is a schematic side sectional view showing a state in which the forceps cup at the distal end portion of the endoscope biopsy forceps for endoscope of the first reference example of the present invention is opened.
FIG. 3 is a side view showing an overall configuration of an endoscope incision-type biopsy forceps according to a first reference example of the present invention.
4 is a cross-sectional view taken along IV-IV in FIG. 1 of an endoscopic biopsy forceps for endoscope according to a first reference example of the present invention.
FIG. 5 is a schematic side sectional view showing a state in which the forceps cup at the distal end portion of the endoscope biopsy forceps for endoscope of the second reference example of the present invention is completely closed.
FIG. 6 is a side view showing a state in which the teeth of the forceps cup of the mouthpiece-type biopsy forceps for endoscope of the second reference example of the present invention pass each other.
FIG. 7 is a schematic side sectional view showing a state in which the forceps cup at the distal end portion of the endoscope biopsy forceps for endoscope of the third reference example of the present invention is completely closed.
FIG. 8 is a schematic side sectional view showing a state in which the forceps cup at the distal end portion of the endoscope biopsy forceps for endoscope of the fourth reference example of the present invention is completely closed.
9 is a side substantially示断view of a state in which the forceps cup is fully closed distal end portion of the endoscopic alligator biopsy forceps real施例of the present invention.
[Explanation of symbols]
1 Forceps cup 2 Flexible sheath 3 Operation wire

Claims (1)

嘴状に開閉する一対の鉗子カップのうち少なくとも一方の鉗子カップの縁部が鋸歯状に形成されて、上記一対の鉗子カップが閉じる際に、双方の縁部どうしがすれ違ってから閉じきるように構成された内視鏡用鰐口型生検鉗子であって、
上記一対の鉗子カップのうち一方の鉗子カップの縁部が平刃状に形成され、
上記一対の鉗子カップが閉じる際に、双方の縁部どうしが角度をもってすれ違うことを特徴とする内視鏡用鰐口型生検鉗子。Edge of at least one forcep cup among a pair of forceps cups for opening and closing the beak is formed in a sawtooth shape, when the pair of forcep cups are closed, so that both edges each other Kiru close it pass each other An endoscopic biopsy forceps for endoscope configured as described above,
The edge of one forceps cup of the pair of forceps cups is formed in a flat blade shape,
An endoscopic biopsy forceps for endoscope which is characterized in that, when the pair of forceps cups closes, both edges pass with an angle .
JP2000392585A 2000-12-25 2000-12-25 Endoscopic biopsy forceps for endoscope Expired - Fee Related JP4618880B2 (en)

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US7762960B2 (en) 2005-05-13 2010-07-27 Boston Scientific Scimed, Inc. Biopsy forceps assemblies
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WO2019022287A1 (en) * 2017-07-28 2019-01-31 재단법인 대구경북과학기술원 Biopsy module having elastic holding hinge employing elastic means and method for operating same

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