JP2019176993A - Biopsy needle - Google Patents

Biopsy needle Download PDF

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JP2019176993A
JP2019176993A JP2018068400A JP2018068400A JP2019176993A JP 2019176993 A JP2019176993 A JP 2019176993A JP 2018068400 A JP2018068400 A JP 2018068400A JP 2018068400 A JP2018068400 A JP 2018068400A JP 2019176993 A JP2019176993 A JP 2019176993A
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needle
wire
end side
wall
hollow needle
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JP7161740B2 (en
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松本　和也
Kazuya Matsumoto
和也 松本
賢 植木
Masaru Ueki
賢 植木
上原　一剛
Kazutaka Uehara
一剛 上原
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Tottori University NUC
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Abstract

To provide a biopsy needle which uses a wire and has small puncture resistance, and in which the wire is hardly peeled from the biopsy needle during puncture, and the wire easily cuts a biological tissue.SOLUTION: A biopsy needle 10 of one embodiment of the present invention comprises: a hollow needle part 11 having an injection needle-shaped opening 12 at its tip end; and cutting means comprised of a wire 15 located at the part of the injection needle-shaped opening 12 provided on the tip end side of the hollow needle part 11, and used for cutting biological tissue. An annular groove 14 is formed on the surface of an opening wall 13 of the injection needle-shaped opening 12. The intermediate part of the wire 15 is detachably engaged with/fixed to the annular groove 14, both edge sides thereof are extended to the rear end side of the hollow needle part 11 from the rear end side of the opening wall 13 of the injection needle-shaped opening 12 through the inner part or the outer part of the hollow needle part 11, and the wire is provided in an operable manner from the rear end side of the hollow needle part 11.SELECTED DRAWING: Figure 2

Description

本発明は、生体組織の一部を採取するための生検針、特に超音波内視鏡下穿刺吸引法（ＥＵＳ−ＦＮＡ）で用いられる生検針に関する。   The present invention relates to a biopsy needle for collecting a part of a living tissue, and more particularly to a biopsy needle used in an ultrasonic endoscopic puncture suction method (EUS-FNA).

ＥＵＳ−ＦＮＡは、目的とする臓器（例えば、膵臓）を超音波下で観察しつつ、消化管内から生検針を穿刺して腫瘤内部の組織を採取する手技であり、従来から大手の医療機器メーカーを中心にこのＥＵＳ−ＦＮＡで用いられる生検針の開発が進められてきている。   EUS-FNA is a technique to puncture a biopsy needle from the digestive tract and collect tissue inside the tumor while observing the target organ (for example, pancreas) under ultrasound. Development of biopsy needles used in this EUS-FNA has been promoted.

例えば、特許文献１（特開平１１−２２６０２４号公報）には、生検針内に切除ワイヤー（スネア）を閉じた状態で挿入しておき、生検針の先端が所定の組織に近接した際にスネアを押出してスネアの自己拡張作用によって生検針の先端側に拡開させ、その状態で拡開されたスネア及び生検針の先端側を生体組織に当接させ、生検針内部を負圧に維持することにより生体組織を拡開されたスネア及び生検針の先端側を経て生検針内に吸引し、その後にスネアを生検針内に引き込んで収納することにより生体組織を緊縛及び切除し、生体組織片を生検針内に採取する構成の生検針が開示されている。   For example, in Patent Document 1 (Japanese Patent Laid-Open No. 11-22624), a resection wire (snare) is inserted into a biopsy needle in a closed state, and the snare is moved when the tip of the biopsy needle comes close to a predetermined tissue. The biopsy needle is expanded to the tip side of the biopsy needle by the self-expanding action of the snare, and the expanded snare and the tip side of the biopsy needle in that state are brought into contact with the living tissue, and the inside of the biopsy needle is maintained at a negative pressure. The biological tissue is expanded and the tip of the biopsy needle is sucked into the biopsy needle, and then the snare is drawn into the biopsy needle and stored to bind and excise the biological tissue. A biopsy needle is disclosed that is configured to collect the blood in a biopsy needle.

また、特許文献２（特開２０１１−０３０９１３号公報）には、斜め前方に向いて最先端部まで開口する長方形状の組織採取開口面を備えた楔状の組織格納室と、可撓性シースの基端側からの操作により組織採取開口面に沿って進退する可動薄刃とが設けられ、組織採取開口面の最先端側に沿って、組織採取開口面の全幅にわたり水平に配置された先端固定刃を有する生検針であって、この生検針を生体組織内に挿通した際に組織格納室内に入った生体組織を可動薄刃によって切除することにより、組織格納室内に生体組織片を採取する構成の生検針が開示されている。   Patent Document 2 (Japanese Patent Application Laid-Open No. 2011-030913) discloses a wedge-shaped tissue storage chamber having a rectangular tissue collection opening surface that opens obliquely forward to the most distal portion, and a flexible sheath. A distal fixed blade that is provided horizontally with a movable thin blade that moves forward and backward along the tissue collection opening surface by an operation from the proximal end side, and is disposed horizontally across the entire width of the tissue collection opening surface along the most distal side of the tissue collection opening surface A biopsy needle having a configuration in which a biological tissue piece that has entered the tissue storage chamber when the biopsy needle is inserted into the biological tissue is excised with a movable thin blade to collect a piece of biological tissue in the tissue storage chamber. A meter reading is disclosed.

特許文献１に開示されている生検針では、切除ワイヤー（スネア）を拡径した状態で生体組織内に穿刺する必要があるが、穿刺時の抵抗が大きいためにスネアに不具合が生じるおそれがある。また、特許文献２に開示されている生検針では、針先端部に引き込んだ組織しか採取できず、検体採取量が不十分で確定診断に至らない場合があり、より効率的に組織が採取できる新しい生検針が求められていた。   In the biopsy needle disclosed in Patent Document 1, it is necessary to puncture the living tissue with the diameter of the excision wire (snare) expanded. However, there is a risk that the snare may fail due to a large resistance during puncturing. . In addition, the biopsy needle disclosed in Patent Document 2 can only collect tissue drawn into the tip of the needle, and the amount of sample collected may be insufficient, leading to definitive diagnosis, and tissue can be collected more efficiently. A new biopsy needle was sought.

このような従来の生検針の問題点を解決するため、発明者等は、特許文献３（特許第６１８３８５８号公報）に開示されているような、注射針形状の開口の開口壁上にワイヤー（糸）を装着した構成の生検針を開発した。この生検針の概略を、図１５を用いて説明する。なお、図１５Ａは従来例の生検針の平面図であり、図１５Ｂは図１５Ａの部分縦断面図である。   In order to solve such problems of the conventional biopsy needle, the inventors have formed a wire (on the opening wall of the needle-shaped opening as disclosed in Patent Document 3 (Japanese Patent No. 6183858)). Developed a biopsy needle with a threaded configuration. The outline of this biopsy needle is demonstrated using FIG. 15A is a plan view of a conventional biopsy needle, and FIG. 15B is a partial longitudinal sectional view of FIG. 15A.

この生検針１００は、中空の針部１０１の先端側の注射針形状の開口１０２の開口壁１０２ａ上に、組織を切断するための切断手段として、ワイヤー１０３が設けられている。また、中空の針部１０１には、注射針形状の開口１０２の後端側に中空の針部１０１の壁を貫通する貫通孔１０４、１０５が設けられている。   The biopsy needle 100 is provided with a wire 103 as a cutting means for cutting tissue on an opening wall 102 a of an injection needle-shaped opening 102 on the distal end side of a hollow needle portion 101. Further, the hollow needle portion 101 is provided with through holes 104 and 105 penetrating the wall of the hollow needle portion 101 on the rear end side of the injection needle-shaped opening 102.

ワイヤー１０３は、一方側の端部が貫通孔１０４と注射針形状の開口１０２とを通されて中空の針部１０１に固定されており、一方の端部から延在している部分が注射針形状の開口の開口壁１０２ａ上にループ状に容易に易剥離性接着材で固定されているとともに、他方側の端部が中空の針部１０１の内部を経て、中空の針部１０１の後端に形成された開孔１０６より外部に延在するように挿通されている。   One end of the wire 103 is fixed to the hollow needle 101 through the through-hole 104 and the injection needle shaped opening 102, and the portion extending from the one end is the injection needle. It is fixed on the opening wall 102a of the shape opening with an easily peelable adhesive in a loop shape, and the other end passes through the inside of the hollow needle 101, and the rear end of the hollow needle 101 It is inserted so as to extend to the outside from the opening 106 formed in.

このような構成の生検針によれば、ワイヤー１０３が注射針形状の開口１０２の開口壁１０２ａ上にループ状に固定されているため、特許文献１ないし特許文献２に開示されている生検針と比すると穿刺時の抵抗が小さく、穿刺時に中空の針部１０１内に生体組織を引き込んだ後にワイヤー１０３を引っ張るのみで、中空の針部１０１の先端側の注射針形状の開口１０２の部分において生体組織を容易に切断でき、中空の針部１０１内に採取する生体組織片の採取量を多くできるとともに効率的に回収することが可能となるという優れた効果を奏するものである。   According to the biopsy needle having such a configuration, since the wire 103 is fixed in a loop shape on the opening wall 102a of the injection needle-shaped opening 102, the biopsy needle disclosed in Patent Documents 1 and 2 In comparison, the resistance at the time of puncture is small, and the living tissue is drawn into the hollow needle portion 101 at the time of puncture and then the wire 103 is pulled, and the living body is formed at the injection needle-shaped opening 102 on the distal end side of the hollow needle portion 101. The tissue can be easily cut, and it is possible to increase the amount of biological tissue pieces collected in the hollow needle portion 101 and to achieve an excellent effect that the tissue can be efficiently collected.

特開平１１−２２６０２４JP-A-11-222024 特開２０１１−０３０９１３号公報JP 2011-030913 A 特許第６１８３８５８号公報Japanese Patent No. 6183858

しかしながら、特許文献３に開示されている生検針１００では、ワイヤー１０３が注射針形状の開口１０２の開口壁１０２ａ上にループ状に固定されていることにより、ワイヤー１０３が存在しない場合と比すると、穿刺時の抵抗が大きくなって切れ味が悪くなることがあること、ワイヤーは易剥離性接着材で固定されているが穿刺時に剥がれる危険性があること等の課題が存在していた。発明者等は、このような特許文献３に開示されている生検針の課題を解決すべく種々検討を重ねた結果、本発明を完成するに至ったのである。   However, in the biopsy needle 100 disclosed in Patent Document 3, the wire 103 is fixed in a loop shape on the opening wall 102a of the injection needle-shaped opening 102, so that compared to the case where the wire 103 is not present, There have been problems such as increased resistance at the time of puncture and poor sharpness, and the wire being fixed with an easily peelable adhesive but having a risk of peeling at the time of puncture. As a result of various studies to solve the problems of the biopsy needle disclosed in Patent Document 3, the inventors have completed the present invention.

すなわち、本発明は、ワイヤーを用いた、特にＥＵＳ−ＦＮＡに最適な生検針であって、穿刺抵抗が小さく、穿刺時にワイヤーが生検針から剥離し難く、またワイヤーによる生体組織の切断を行い易い生検針を提供することを目的とする。   That is, the present invention is a biopsy needle most suitable for EUS-FNA using a wire, and has a low puncture resistance. The wire is difficult to peel off from the biopsy needle at the time of puncture, and the living tissue can be easily cut with the wire. The aim is to provide a biopsy needle.

上記目的を達成するため、本発明の第１の態様の生検針は、
先端に注射針形状の開口を有する中空の針部と、
前記中空の針部の先端側に設けられた前記注射針形状の開口部分に位置する生体組織を切断するためのワイヤーからなる切断手段と、
を備えた、生体組織内に穿刺して前記中空の針部の内部に生体組織の一部を取り込んで採取するための生検針であって、
前記注射針形状の開口の開口壁の表面又は前記中空の針部の内部壁には環状の溝が形成されており、
前記ワイヤーは、中間部が前記環状の溝内に取り外し可能に嵌合・固定され、両端側がともに前記注射針形状の開口の開口壁の後端側から前記中空の針部の内部又は外部を通されて前記中空の針部の後端側まで延在され、前記中空の針部の後端側から操作可能に設けられていることを特徴とする。 In order to achieve the above object, the biopsy needle according to the first aspect of the present invention comprises:
A hollow needle portion having an injection needle-shaped opening at the tip;
A cutting means comprising a wire for cutting a living tissue located in the opening part of the injection needle shape provided on the distal end side of the hollow needle part;
A biopsy needle for puncturing into a living tissue and taking and collecting a part of the living tissue inside the hollow needle part,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle part,
The wire is detachably fitted and fixed in the annular groove in the middle portion, and both ends pass through the inside or outside of the hollow needle portion from the rear end side of the opening wall of the injection needle shape opening. It is extended to the rear end side of the hollow needle part, and is provided so as to be operable from the rear end side of the hollow needle part.

第１の態様の生検針によれば、ワイヤーが注射針形状の開口の開口壁の表面又は前記中空の針部の内部壁に形成された環状の溝内に取り外し可能に嵌合・固定されているため、ワイヤーが注射針形状の開口の開口壁から突出し難くなる。これにより、第１の態様の生検針を生体組織に穿刺した際には、抵抗が少なくなるので、穿刺が容易となって中空の針部内へ導入される生体組織片の量を多くすることができるようになる。加えて、第１の態様の生検針を生体組織に穿刺した後に中空の針部の後端側まで延在されているワイヤーの両端側を牽引する（引っ張る）ことにより、容易にワイヤーは環状の溝から外れて後端部へ向かって環の径が小さくなり、注射針形状の開口部分に位置する生体組織を切断することができ、中空の針部内へ多くの生体組織片を採取することができるようになる。   According to the biopsy needle of the first aspect, the wire is detachably fitted and fixed in the surface of the opening wall of the injection needle-shaped opening or in the annular groove formed in the inner wall of the hollow needle portion. Therefore, it becomes difficult for the wire to protrude from the opening wall of the injection needle-shaped opening. As a result, when the biopsy needle of the first aspect is punctured into the living tissue, the resistance decreases, so that the amount of the living tissue piece introduced into the hollow needle portion can be easily increased. become able to. In addition, after the biopsy needle of the first aspect is punctured into the biological tissue, the wire is easily formed into an annular shape by pulling (pulling) both ends of the wire extending to the rear end side of the hollow needle portion. The diameter of the ring decreases from the groove toward the rear end, the biological tissue located in the injection needle-shaped opening can be cut, and many pieces of biological tissue can be collected into the hollow needle. become able to.

また、本発明の第２の態様の生検針は、
先端に注射針形状の開口を有する中空の針部と、
前記中空の針部の先端側に設けられた前記注射針形状の開口部分に位置する生体組織を切断するためのワイヤーからなる切断手段と、
を備えた、生体組織内に穿刺して前記中空の針部の内部に生体組織の一部を取り込んで採取するための生検針であって、
前記注射針形状の開口の開口壁の表面又は前記中空の針部の内部壁には環状の溝が形成されており、
前記ワイヤーは、中間部が前記環状の溝内に取り外し可能に嵌合・固定され、一方の端部が前記注射針形状の開口の開口壁の後端側近傍で前記環状の溝内に固着され、他方の端部が前記注射針形状の開口の開口壁の後端側から前記中空の針部の内部又は外部を通されて前記中空の針部の後端側まで延在され、前記中空の針部の後端側から操作可能に設けられていることを特徴とする。 The biopsy needle of the second aspect of the present invention is
A hollow needle portion having an injection needle-shaped opening at the tip;
A cutting means comprising a wire for cutting a living tissue located in the opening part of the injection needle shape provided on the distal end side of the hollow needle part;
A biopsy needle for puncturing into a living tissue and taking and collecting a part of the living tissue inside the hollow needle part,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle part,
The intermediate portion of the wire is detachably fitted and fixed in the annular groove, and one end is fixed in the annular groove in the vicinity of the rear end side of the opening wall of the injection needle-shaped opening. The other end is extended from the rear end side of the opening wall of the injection needle-shaped opening to the rear end side of the hollow needle portion through the inside or the outside of the hollow needle portion, It is provided to be operable from the rear end side of the needle portion.

第２の態様の生検針によれば、第１の態様の生検針と同様に、ワイヤーが注射針形状の開口の開口壁の表面又は前記中空の針部の内部壁に形成された環状の溝内に取り外し可能に嵌合・固定されているため、ワイヤーが注射針形状の開口の開口壁から突出し難くなり、第２の態様の生検針を生体組織に穿刺した際には、抵抗が少なくなるので、穿刺が容易となって中空の針部内へ導入される生体組織片の量を多くすることができるようになる。加えて、第２の態様の生検針では、ワイヤーの一方側の端部が注射針形状の開口の開口壁の後端側近傍で環状の溝内に固着され、他方の端部が注射針形状の開口の開口壁の後端側から中空の針部の内部又は外部を通されて前記中空の針部の後端側まで延在され、中空の針部の後端側から操作可能に設けられているため、第２の態様の生検針を生体組織に穿刺した後に中空の針部の後端側まで延在されている一本のワイヤーを操作する（引っ張る）ことにより、容易にワイヤーは環状の溝から外れて後端部へ向かって環の径が小さくなり、注射針形状の開口部分に位置する生体組織を切断することができ、中空の針部内へ多くの生体組織片を採取することができるようになる。   According to the biopsy needle of the second aspect, similarly to the biopsy needle of the first aspect, the annular groove formed on the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle portion Since the wire is detachably fitted and fixed inside, it is difficult for the wire to protrude from the opening wall of the injection needle-shaped opening, and resistance is reduced when the biopsy needle of the second aspect is punctured into the living tissue. Therefore, puncture is facilitated, and the amount of the biological tissue piece introduced into the hollow needle portion can be increased. In addition, in the biopsy needle of the second aspect, one end of the wire is fixed in the annular groove in the vicinity of the rear end side of the opening wall of the injection needle-shaped opening, and the other end is the injection needle shape. The hollow needle portion is extended from the rear end side of the opening wall of the opening to the rear end side of the hollow needle portion so as to be operable from the rear end side of the hollow needle portion. Therefore, after the biopsy needle of the second aspect is punctured into the living tissue, the wire is easily annular by operating (pulling) one wire extending to the rear end side of the hollow needle portion. The diameter of the ring decreases from the groove to the rear end, the biological tissue located in the injection needle-shaped opening can be cut, and many biological tissue pieces are collected into the hollow needle Will be able to.

また、第３の態様の生検針は、第１又は第２の態様の生検針において、前記ワイヤーは、前記注射針形状の開口の開口壁の表面又は前記中空の針部の内部壁と実質的に同一面を形成するように、前記環状の溝内に嵌合・固定されていることを特徴とする。   The biopsy needle according to a third aspect is the biopsy needle according to the first or second aspect, wherein the wire is substantially the same as the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle portion. Are fitted and fixed in the annular groove so as to form the same surface.

第３の態様の生検針によれば、ワイヤーが環状の溝内に注射針形状の開口の開口壁の表面又は中空の針部の内部壁と実質的に同一面を形成するように嵌合・固定されているので、生検針を生体組織に穿刺した際には抵抗がより少なくなって上記第１の態様の生検針が奏する効果がより良好に奏されるようになる。なお、本発明における「実質的に同一面」という用語は、完全に同一面となっていることが望ましいが、通常のワイヤーの断面は円形状であるので、完全に注射針形状の開口の開口壁の表面又は中空の針部の内部壁と同一面とすることは困難なため、環状の溝から突出していなければ、一部窪んでいる箇所があってもよいことを示す意味で用いられている。   According to the biopsy needle of the third aspect, the wire is fitted in the annular groove so as to form substantially the same surface as the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle portion. Since it is fixed, when the biopsy needle is punctured into the living tissue, the resistance is reduced, and the effect of the biopsy needle of the first aspect is more excellent. The term “substantially the same surface” in the present invention is preferably completely the same surface, but since the cross section of a normal wire is circular, the opening of a completely injection needle-shaped opening It is difficult to make the surface of the wall or the same surface as the inner wall of the hollow needle part, so if it does not protrude from the annular groove, it is used to indicate that there may be a part that is recessed Yes.

また、第４の態様の生検針は、第１〜第３のいずれかの態様の生検針において、前記ワイヤーは、前記環状の溝内に易剥離性接着剤により固定されていることを特徴とする。   The biopsy needle according to a fourth aspect is the biopsy needle according to any one of the first to third aspects, wherein the wire is fixed in the annular groove by an easily peelable adhesive. To do.

第４の態様の生検針によれば、生検針を生体組織内に穿刺する際にはワイヤーが環状の溝から外れることが少なくなり、中空の針部の後端側まで延在されているワイヤーの端部を操作することにより、容易にワイヤーを環状の溝から外させて注射針形状の開口部分に位置する生体組織を切断することができるようになる。   According to the biopsy needle of the fourth aspect, when the biopsy needle is punctured into the living tissue, the wire is less likely to come off from the annular groove, and the wire extends to the rear end side of the hollow needle portion. By manipulating the end portion, it is possible to easily remove the wire from the annular groove and cut the living tissue located in the opening portion of the injection needle shape.

また、本発明の第５の態様の生検針は、第１〜第４のいずれかの態様の生検針において、前記注射針形状の開口の開口壁の後端側には、前記環状の溝と前記中空の針部の内部壁又は外部壁との間に直線状の溝が形成されており、前記ワイヤーは前記直線状の溝内にも前記注射針形状の開口の開口壁と実質的に同一面を形成するように嵌合・固定されていることを特徴とする。   The biopsy needle of the fifth aspect of the present invention is the biopsy needle of any one of the first to fourth aspects, wherein the annular groove is formed on the rear end side of the opening wall of the injection needle-shaped opening. A straight groove is formed between the inner wall or the outer wall of the hollow needle portion, and the wire is substantially the same as the opening wall of the injection needle-shaped opening in the straight groove. It is characterized by being fitted and fixed so as to form a surface.

第５の態様の生検針によれば、ワイヤーが注射針形状の開口の後端側の開口壁を乗り越える部分にも溝が設けられているので、この部分でもワイヤーが突出しなくなり、生検針を生体組織内に穿刺する際の抵抗がより小さくなり、上記の効果がより良好に奏されるようになる。   According to the biopsy needle of the fifth aspect, since the groove is provided also in the portion where the wire gets over the opening wall on the rear end side of the injection needle-shaped opening, the wire does not protrude even in this portion, and the biopsy needle is The resistance at the time of puncturing into the tissue becomes smaller, and the above-described effect is more satisfactorily achieved.

さらに第６の態様の生検針は、第１〜第５の態様の生検針において、前記中空の針部の外部壁には、前記注射針形状の開口の後端側から前記中空の針部の後端側まで直線状の溝が形成されており、
前記ワイヤーは前記中空の針部の外部壁に形成された直線状の溝内に嵌合・固定されて前記中空の針部の後端側まで延在されていることを特徴とする。 Furthermore, the biopsy needle according to the sixth aspect is the biopsy needle according to the first to fifth aspects, wherein the hollow needle portion has an outer wall formed on the outer wall of the hollow needle portion from the rear end side of the injection needle shape opening. A straight groove is formed to the rear end side,
The wire is fitted and fixed in a linear groove formed on the outer wall of the hollow needle portion, and extends to the rear end side of the hollow needle portion.

第６の態様の生検針によれば、ワイヤーの環状の溝から延在されている部分が中空の針部の外壁に形成された直線状の溝内に嵌合・固定されているので、ワイヤーが中空の針部の外部壁側に突出しないようにすることができる。これにより、中空の針部の後端側まで延在されているワイヤーの端部を操作した際に、注射針形状の開口の開口壁の環状の溝内に嵌合・固定されているワイヤーの中間部分まで力を伝達させやすくなるので、より容易にワイヤーを環状の溝から外させて注射針形状の開口部分に位置する生体組織を切断することができるようになる。   According to the biopsy needle of the sixth aspect, since the portion extending from the annular groove of the wire is fitted and fixed in the linear groove formed on the outer wall of the hollow needle portion, the wire Can be prevented from projecting to the outer wall side of the hollow needle portion. As a result, when the end of the wire extending to the rear end side of the hollow needle portion is operated, the wire fitted and fixed in the annular groove of the opening wall of the injection needle-shaped opening Since the force can be easily transmitted to the intermediate portion, the living tissue located in the opening portion of the injection needle shape can be cut more easily by removing the wire from the annular groove.

また、第７の態様の生検針は、第１〜第6の態様の生検針において、前記注射針形状の開口の後端側の近傍には、前記中空の針部の内外を貫通する貫通孔が少なくとも一つ設けられており、前記ワイヤーは前記貫通孔及び前記中空の針部の内部を経て前記中空の針部の後端側まで延在されていることを特徴とする。   Further, the biopsy needle of the seventh aspect is the through-hole penetrating the inside and outside of the hollow needle portion in the vicinity of the rear end side of the injection needle-shaped opening in the biopsy needle of the first to sixth aspects. Is provided, and the wire extends to the rear end side of the hollow needle portion through the inside of the through hole and the hollow needle portion.

第７の態様の生検針によれば、ワイヤーの環状の溝から延在されている部分が中空の針部の外部壁側に位置する長さを短くでき、環状の溝から延在されているワイヤーの大部分を中空の針部の内部に挿通されている状態とすることができる。これにより、中空の針部の後端側まで延在されているワイヤーの端部を操作した際に、注射針形状の開口の開口壁の環状の溝内に嵌合・固定されているワイヤーの中間部分まで力を伝達させやすくなるので、より容易にワイヤーを環状の溝から外させて注射針形状の開口部分に位置する生体組織を切断することができるようになる。   According to the biopsy needle of the seventh aspect, the length of the portion extending from the annular groove of the wire located on the outer wall side of the hollow needle portion can be shortened and extended from the annular groove. Most of the wire can be inserted into the hollow needle portion. As a result, when the end of the wire extending to the rear end side of the hollow needle portion is operated, the wire fitted and fixed in the annular groove of the opening wall of the injection needle-shaped opening Since the force can be easily transmitted to the intermediate portion, the living tissue located in the opening portion of the injection needle shape can be cut more easily by removing the wire from the annular groove.

また、本発明の第８の態様の生検針は、第１〜第４の態様の生検針において、前記注射針形状の開口の後端側の前記環状の溝には前記中空の針部の内部との間に貫通孔が設けられており、前記ワイヤーは、前記貫通孔及び前記中空の針部の内部を経て、前記中空の針部の後端側まで延在されていることを特徴とする。   The biopsy needle according to the eighth aspect of the present invention is the biopsy needle according to the first to fourth aspects, wherein the annular groove on the rear end side of the injection needle-shaped opening is arranged inside the hollow needle portion. A through hole is provided between the wire and the wire extending to the rear end side of the hollow needle portion through the inside of the through hole and the hollow needle portion. .

第８の態様の生検針によれば、ワイヤーが中空の針部の外部壁側に一切露出しないようにできるので、中空の針部の後端側まで延在されているワイヤーの端部を操作した際に、注射針形状の開口の開口壁の環状の溝内に嵌合・固定されているワイヤーの中間部分まで力を伝達させやすくなるので、より容易にワイヤーを環状の溝から外させて注射針形状の開口部分に位置する生体組織を切断することができるようになる。   According to the biopsy needle of the eighth aspect, since the wire can be prevented from being exposed at all on the outer wall side of the hollow needle portion, the end portion of the wire extending to the rear end side of the hollow needle portion is operated. When it is done, it will be easier to transmit force to the middle part of the wire that is fitted and fixed in the annular groove of the opening wall of the injection needle shape opening, so it is easier to remove the wire from the annular groove It becomes possible to cut the living tissue located in the injection needle-shaped opening.

また、本発明の第９の態様の生検針は、第７又は第８の態様の生検針において、前記中空の針部の内部壁には、前記注射針形状の開口の後端側から前記中空の針部の後端側まで直線状の溝が形成されており、前記ワイヤーの前記中空の針部の内部を通る部分は前記中空の針部の内部壁に形成された直線状の溝内に嵌合・固定されて前記中空の針部の後端側まで延在されていることを特徴とする。   Further, the biopsy needle of the ninth aspect of the present invention is the biopsy needle of the seventh or eighth aspect, wherein the hollow inner wall of the hollow needle portion is hollow from the rear end side of the injection needle-shaped opening. A straight groove is formed up to the rear end side of the needle portion of the wire, and a portion of the wire passing through the inside of the hollow needle portion is in a straight groove formed on the inner wall of the hollow needle portion. It is fitted and fixed and extends to the rear end side of the hollow needle portion.

中空の針部の内径は小さく、また、中空の針部には生検針の使用時に内針が挿入されるが、中空の針部の内面と内針との間のすき間も非常に小さくなる。ワイヤーとしては細径のものが用いられるが、中空の針部の内面と内針の外面との間のすき間が小さいので、ワイヤーと中空の針部の内面及び内針の外面との間の摩擦も大きくなり、ワイヤーの操作性が悪化する。それに対し、第９の態様の生検針によれば、中空の針部の内部壁に注射針形状の開口の後端側から中空の針部の後端側まで直線状の溝が形成されているので、この直線状の溝内にワイヤーを配置することができ、ワイヤーの摩擦が小さくなって操作性が良好となる。特に、環状の溝が中空の針部の内部壁に形成されている態様のものに適用すると、中空の針部の内部壁側には一切のワイヤーが突出しないようにできるため、上記効果がより良好に奏されるようになる。   The inner diameter of the hollow needle portion is small, and the inner needle is inserted into the hollow needle portion when the biopsy needle is used, but the clearance between the inner surface of the hollow needle portion and the inner needle is also very small. The wire has a small diameter, but the clearance between the inner surface of the hollow needle and the outer surface of the inner needle is small, so the friction between the wire and the inner surface of the hollow needle and the outer surface of the inner needle And the operability of the wire deteriorates. In contrast, according to the biopsy needle of the ninth aspect, a linear groove is formed in the inner wall of the hollow needle portion from the rear end side of the injection needle-shaped opening to the rear end side of the hollow needle portion. Therefore, a wire can be arrange | positioned in this linear groove | channel, the friction of a wire becomes small and operativity becomes favorable. In particular, when the present invention is applied to an embodiment in which an annular groove is formed on the inner wall of the hollow needle portion, it is possible to prevent any wires from projecting to the inner wall side of the hollow needle portion, so that the above effect is further improved. It will be played well.

また、本発明の第１０の態様の生検針は、
先端に注射針形状の開口を有する中空の針部と、
前記中空の針部の先端側に設けられた前記注射針形状の開口部分に位置する生体組織を切断するためのワイヤーからなる切断手段と、
を備えた、生体組織内に穿刺して前記中空の針部の内部に生体組織の一部を取り込んで採取するための生検針であって、
前記注射針形状の開口の開口壁の表面には環状の溝が形成されており、
前記環状の溝の先端側には、前記環状の溝の内部と前記中空の針部の外部壁又は内部壁との間を連通する貫通孔が形成され、
前記ワイヤーは、中間部が前記環状の溝内に取り外し可能に嵌合・固定され、両端側がともに前記注射針形状の開口の開口壁の先端側から前記貫通孔を通されて前記中空の針部の内部又は外部を前記中空の針部の後端側まで延在され、前記中空の針部の後端側から操作可能に設けられていることを特徴とする。 The biopsy needle of the tenth aspect of the present invention is
A hollow needle portion having an injection needle-shaped opening at the tip;
A cutting means comprising a wire for cutting a living tissue located in the opening part of the injection needle shape provided on the distal end side of the hollow needle part;
A biopsy needle for puncturing into a living tissue and taking and collecting a part of the living tissue inside the hollow needle part,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening,
A through-hole that communicates between the inside of the annular groove and the outer wall or the inner wall of the hollow needle portion is formed on the tip side of the annular groove,
The wire is detachably fitted and fixed in the annular groove in the intermediate portion, and both ends are passed through the through hole from the distal end side of the opening wall of the injection needle-shaped opening, and the hollow needle portion The inside or the outside of the hollow needle portion is extended to the rear end side of the hollow needle portion, and is provided to be operable from the rear end side of the hollow needle portion.

第１０の態様の生検針によれば、ワイヤーが注射針形状の開口の開口壁の表面又は前記中空の針部の内部壁に形成された環状の溝内に取り外し可能に嵌合・固定されているため、ワイヤーが注射針形状の開口の開口壁から突出し難くなる。これにより、第１０の態様の生検針を生体組織に穿刺した際には、抵抗が少なくなるので、穿刺が容易となって中空の針部内へ導入される生体組織片の量を多くすることができるようになる。加えて、第１０の態様の生検針によれば、ワイヤーの両端側がともに前記注射針形状の開口の開口壁の先端側から外部壁又は内部壁との間を連通する貫通孔を通されて中空の針部の内部又は外部を後端側まで延在されているので、第１０の態様の生検針を生体組織に穿刺した後に中空の針部の後端側まで延在されているワイヤーの両端側を牽引する（引っ張る）ことにより、容易にワイヤーは環状の溝から外れて先端部へ向かって環の径が小さくなり、注射針形状の開口部分に位置する生体組織を切断することができ、中空の針部内へ多くの生体組織片を採取することができるようになる。   According to the biopsy needle of the tenth aspect, the wire is removably fitted and fixed in an annular groove formed on the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle portion. Therefore, it becomes difficult for the wire to protrude from the opening wall of the injection needle-shaped opening. Accordingly, when the biopsy needle of the tenth aspect is punctured into the biological tissue, the resistance is reduced, so that the puncture is facilitated and the amount of the biological tissue piece introduced into the hollow needle portion can be increased. become able to. In addition, according to the biopsy needle of the tenth aspect, both ends of the wire are hollow through the through-hole communicating with the outer wall or the inner wall from the distal end side of the opening wall of the injection needle-shaped opening. Since the inside or outside of the needle portion of the needle is extended to the rear end side, both ends of the wire extended to the rear end side of the hollow needle portion after the biopsy needle of the tenth aspect is punctured into the living tissue By pulling (pulling) the side, the wire is easily removed from the annular groove, the diameter of the ring decreases toward the tip, and the living tissue located at the injection needle-shaped opening can be cut, Many biological tissue pieces can be collected into the hollow needle portion.

また、本発明の第１１の態様の生検針は、
先端に注射針形状の開口を有する中空の針部と、
前記中空の針部の先端側に設けられた前記注射針形状の開口部分に位置する生体組織を切断するためのワイヤーからなる切断手段と、
を備えた、生体組織内に穿刺して前記中空の針部の内部に生体組織の一部を取り込んで採取するための生検針であって、
前記注射針形状の開口の開口壁の表面には環状の溝が形成されており、
前記環状の溝の先端側には、前記環状の溝の内部と前記中空の針部の外部壁又は内部壁との間を連通する貫通孔が形成され、
前記ワイヤーは、中間部が前記環状の溝内に取り外し可能に嵌合・固定され、一方の端部が前記注射針形状の開口の開口壁の先端側近傍で前記環状の溝内に固着され、他方の端部が前記注射針形状の開口の開口壁の先端側から前記貫通孔を通されて前記中空の針部の内部又は外部を前記中空の針部の後端側まで延在され、前記中空の針部の後端側から操作可能に設けられていることを特徴とする。 The biopsy needle of the eleventh aspect of the present invention is
A hollow needle portion having an injection needle-shaped opening at the tip;
A cutting means comprising a wire for cutting a living tissue located in the opening part of the injection needle shape provided on the distal end side of the hollow needle part;
A biopsy needle for puncturing into a living tissue and taking and collecting a part of the living tissue inside the hollow needle part,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening,
A through-hole that communicates between the inside of the annular groove and the outer wall or the inner wall of the hollow needle portion is formed on the tip side of the annular groove,
The intermediate portion of the wire is detachably fitted and fixed in the annular groove, and one end is fixed in the annular groove in the vicinity of the distal end side of the opening wall of the injection needle-shaped opening, The other end is passed through the through-hole from the front end side of the opening wall of the injection needle-shaped opening and extends inside or outside the hollow needle portion to the rear end side of the hollow needle portion, It is provided so that it can be operated from the rear end side of the hollow needle portion.

第１１の態様の生検針によれば、第１０の態様の生検針と同様に、ワイヤーが注射針形状の開口の開口壁の表面又は前記中空の針部の内部壁に形成された環状の溝内に取り外し可能に嵌合・固定されているため、ワイヤーが注射針形状の開口の開口壁から突出し難くなり、第１１の態様の生検針を生体組織に穿刺した際には、抵抗が少なくなるので、穿刺が容易となって中空の針部内へ導入される生体組織片の量を多くすることができるようになる。加えて、第１１の態様の生検針では、ワイヤーの一方側の端部が注射針形状の開口の開口壁の先端側近傍で環状の溝内に固着され、他方の端部が注射針形状の開口の開口壁の先端側から外部壁又は内部壁との間を連通する貫通孔を通されて中空の針部の内部又は外部を後端側まで延在されているので、第１１の態様の生検針を生体組織に穿刺した後に中空の針部の後端側まで延在されている一本のワイヤーを牽引する（引っ張る）ことにより、容易にワイヤーは環状の溝から外れて先端部へ向かって環の径が小さくなり、注射針形状の開口部分に位置する生体組織を切断することができ、中空の針部内へ多くの生体組織片を採取することができるようになる。   According to the biopsy needle of the eleventh aspect, similarly to the biopsy needle of the tenth aspect, the annular groove formed on the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle portion Since the wire is detachably fitted and fixed therein, the wire is difficult to protrude from the opening wall of the injection needle-shaped opening, and resistance is reduced when the biopsy needle of the eleventh aspect is punctured into the living tissue. Therefore, puncture is facilitated, and the amount of the biological tissue piece introduced into the hollow needle portion can be increased. In addition, in the biopsy needle of the eleventh aspect, one end portion of the wire is fixed in the annular groove in the vicinity of the distal end side of the opening wall of the injection needle shape opening, and the other end portion is formed in the injection needle shape. Since the through hole communicating between the front end side of the opening wall of the opening and the outer wall or the inner wall is passed through and the inside or outside of the hollow needle portion is extended to the rear end side, the eleventh aspect By pulling (pulling) a single wire that extends to the rear end side of the hollow needle after the biopsy needle is punctured into the living tissue, the wire is easily released from the annular groove and moved toward the tip. As a result, the diameter of the ring is reduced, the biological tissue located in the opening portion of the injection needle shape can be cut, and many biological tissue pieces can be collected into the hollow needle portion.

また、本発明の第１２の態様の生検針は、第１０又は１１の態様の生検針において、前記ワイヤーは、前記注射針形状の開口の開口壁の表面又は前記中空の針部の内部壁と実質的に同一面を形成するように、前記環状の溝内に嵌合・固定されていることを特徴とする。   The biopsy needle according to a twelfth aspect of the present invention is the biopsy needle according to the tenth or eleventh aspect, wherein the wire is a surface of an opening wall of the injection needle-shaped opening or an inner wall of the hollow needle portion. It is characterized by being fitted and fixed in the annular groove so as to form substantially the same surface.

第１２の態様の生検針によれば、ワイヤーが環状の溝内に注射針形状の開口の開口壁の表面又は中空の針部の内部壁と実質的に同一面を形成するように嵌合・固定されているので、生検針を生体組織に穿刺した際には抵抗がより少なくなって上記第１０又は１１の態様の生検針が奏する効果がより良好に奏されるようになる。   According to the biopsy needle of the twelfth aspect, the wire is fitted and formed in the annular groove so as to be substantially flush with the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle portion. Since it is fixed, when the biopsy needle is punctured into the living tissue, the resistance is reduced and the effect of the biopsy needle according to the tenth or eleventh aspect is more satisfactorily achieved.

また、本発明の第１３の態様の生検針は、第１０〜１２のいずれかの態様の生検針において、前記ワイヤーは、前記環状の溝内に易剥離性接着剤により固定されていることを特徴とする。   The biopsy needle according to a thirteenth aspect of the present invention is the biopsy needle according to any one of the tenth to twelfth aspects, wherein the wire is fixed in the annular groove with an easily peelable adhesive. Features.

第１３の態様の生検針によれば、生検針を生体組織内に穿刺する際にはワイヤーが環状の溝から外れることが少なくなり、中空の針部の後端側まで延在されているワイヤーの端部を操作することにより、容易にワイヤーを環状の溝から外させて注射針形状の開口部分に位置する生体組織を切断することができるようになる。   According to the biopsy needle of the thirteenth aspect, when the biopsy needle is punctured into the living tissue, the wire is less likely to come off from the annular groove, and the wire extends to the rear end side of the hollow needle portion. By manipulating the end portion, it is possible to easily remove the wire from the annular groove and cut the living tissue located in the opening portion of the injection needle shape.

また、本発明の第１４の態様の生検針は、第１０〜１３のいずれかの態様の生検針において、前記中空の針部の外部壁には、前記貫通孔から前記中空の針部の後端側まで、直線状の溝が形成されており、前記ワイヤーは、前記直線状の溝内に嵌合・固定されて前記中空の針部の後端側まで延在されていることを特徴とする。   The biopsy needle according to a fourteenth aspect of the present invention is the biopsy needle according to any one of the tenth to thirteenth aspects, wherein an outer wall of the hollow needle portion is provided behind the hollow needle portion from the through hole. A linear groove is formed to the end side, and the wire is fitted and fixed in the linear groove and extends to the rear end side of the hollow needle portion. To do.

第１４の態様の生検針によれば、ワイヤーの貫通孔から延在されている部分が中空の針部の外壁に形成された溝内に嵌合・固定されているので、ワイヤーが中空の針部の外部壁側に突出しないようにすることができる。これにより、中空の針部の後端側まで延在されているワイヤーの端部を操作した際に、注射針形状の開口の開口壁の環状の溝内に嵌合・固定されているワイヤーの中間部分まで力を伝達させやすくなるので、より容易にワイヤーを環状の溝から外させて注射針形状の開口部分に位置する生体組織を切断することができるようになる。   According to the biopsy needle of the fourteenth aspect, since the portion extending from the through hole of the wire is fitted and fixed in the groove formed in the outer wall of the hollow needle portion, the wire is a hollow needle. It can be prevented from projecting to the external wall side of the part. As a result, when the end of the wire extending to the rear end side of the hollow needle portion is operated, the wire fitted and fixed in the annular groove of the opening wall of the injection needle-shaped opening Since the force can be easily transmitted to the intermediate portion, the living tissue located in the opening portion of the injection needle shape can be cut more easily by removing the wire from the annular groove.

また、本発明の第１５の態様の生検針は、前記環状の溝の先端側には前記中空の針部の内部壁との間に貫通孔が設けられており、前記ワイヤーは、前記貫通孔及び前記中空の針部の内部を経て、前記中空の針部の後端側まで延在されていることを特徴とする。   In the biopsy needle of the fifteenth aspect of the present invention, a through hole is provided between an inner wall of the hollow needle portion on the distal end side of the annular groove, and the wire is connected to the through hole. And it extends to the rear end side of the hollow needle part through the inside of the hollow needle part.

第１５の態様の生検針によれば、ワイヤーが中空の針部の外部壁側に一切露出しないようにできるので、中空の針部の後端側まで延在されているワイヤーの端部を操作した際に、注射針形状の開口の開口壁の環状の溝内に嵌合・固定されているワイヤーの中間部分まで力を伝達させやすくなるので、より容易にワイヤーを環状の溝から外させて注射針形状の開口部分に位置する生体組織を切断することができるようになる。   According to the biopsy needle of the fifteenth aspect, since the wire can be prevented from being exposed at all on the outer wall side of the hollow needle portion, the end portion of the wire extending to the rear end side of the hollow needle portion is operated. When it is done, it will be easier to transmit force to the middle part of the wire that is fitted and fixed in the annular groove of the opening wall of the injection needle shape opening, so it is easier to remove the wire from the annular groove It becomes possible to cut the living tissue located in the injection needle-shaped opening.

また、第１６の態様の生検針は、第１５の態様の生検針において、前記中空の針部の内部壁には、前記貫通孔から前記中空の針部の後端側まで直線状の溝が形成されており、前記ワイヤーは前記中空の針部の内部壁に形成された直線状の溝内に嵌合・固定されて前記中空の針部の後端側まで延在されていることを特徴とする。   The biopsy needle according to a sixteenth aspect is the biopsy needle according to the fifteenth aspect, wherein a linear groove is formed on the inner wall of the hollow needle portion from the through hole to the rear end side of the hollow needle portion. Formed, and the wire is fitted and fixed in a linear groove formed in the inner wall of the hollow needle portion and extends to the rear end side of the hollow needle portion. And

中空の針部の内径は小さく、また、中空の針部には生検針の使用時に内針が挿入されるが、中空の針部の内面と内針との間のすき間も非常に小さくなる。ワイヤーとしては細径のものが用いられるが、中空の針部の内面と内針の外面との間のすき間が小さいので、ワイヤーと中空の針部の内面及び内針の外面との間の摩擦も大きくなり、ワイヤーの操作性が悪化する。それに対し、第１６の態様の生検針によれば、中空の針部の内部壁に注射針形状の開口の後端側から中空の針部の後端側まで直線状の溝が形成されているので、この直線状の溝内にワイヤーを配置することができ、ワイヤーの摩擦が小さくなって操作性が良好となる。特に、環状の溝が中空の針部の内部壁に形成されている態様のものに適用すると、中空の針部の内部壁側には一切のワイヤーが突出しないようにできるため、上記効果がより良好に奏されるようになる。   The inner diameter of the hollow needle portion is small, and the inner needle is inserted into the hollow needle portion when the biopsy needle is used, but the clearance between the inner surface of the hollow needle portion and the inner needle is also very small. The wire has a small diameter, but the clearance between the inner surface of the hollow needle and the outer surface of the inner needle is small, so the friction between the wire and the inner surface of the hollow needle and the outer surface of the inner needle And the operability of the wire deteriorates. On the other hand, according to the biopsy needle of the sixteenth aspect, a linear groove is formed in the inner wall of the hollow needle portion from the rear end side of the injection needle-shaped opening to the rear end side of the hollow needle portion. Therefore, a wire can be arrange | positioned in this linear groove | channel, the friction of a wire becomes small and operativity becomes favorable. In particular, when the present invention is applied to an embodiment in which an annular groove is formed on the inner wall of the hollow needle portion, it is possible to prevent any wires from projecting to the inner wall side of the hollow needle portion, so that the above effect is further improved. It will be played well.

以上述べたように、本発明の生検針によれば、穿刺抵抗が小さく、穿刺時にワイヤーが生検針から取れがたく、またワイヤーによる生体組織の切断を行い易い、特にＥＵＳ−ＦＮＡに最適な生検針となる。   As described above, according to the biopsy needle of the present invention, the puncture resistance is small, the wire is difficult to remove from the biopsy needle at the time of puncture, and the living tissue can be easily cut with the wire, which is particularly suitable for EUS-FNA. It becomes meter reading.

図１ＡはＥＵＳ−ＦＮＡで使用するための超音波内視鏡と本発明の生検針とを組み合わせた状態の斜視図であり、図１Ｂは粘膜下腫瘍に対してＥＵＳ−ＦＮＡを適用した際の模式図であり、図１Ｃは膵臓腫瘍に対してＥＵＳ−ＦＮＡを適用した際の模式図である。FIG. 1A is a perspective view of a state in which an ultrasonic endoscope for use in EUS-FNA and the biopsy needle of the present invention are combined, and FIG. 1B is a view when EUS-FNA is applied to a submucosal tumor. FIG. 1C is a schematic diagram when EUS-FNA is applied to a pancreatic tumor. 図２Ａは実施形態１の生検針の平面図であり、図２Ａは図１の縦断面図である。2A is a plan view of the biopsy needle of Embodiment 1, and FIG. 2A is a longitudinal sectional view of FIG. 図３Ｃは実施形態１の生検針の第1変形例の平面図であり、図３Ｄは同じく第2変形例の平面図である。FIG. 3C is a plan view of a first modification of the biopsy needle of Embodiment 1, and FIG. 3D is a plan view of the second modification. 図４Ａは実施形態２の生検針の平面図であり、図４Ｂは図４Ａの縦断面図である。4A is a plan view of the biopsy needle of Embodiment 2, and FIG. 4B is a longitudinal sectional view of FIG. 4A. 図５Ａは実施形態３の生検針の平面図であり、図５Ｂは図５Ａの縦断面図であり、図５Cは図５ＢのＶＣ−ＶＣ断面図である。5A is a plan view of the biopsy needle of Embodiment 3, FIG. 5B is a longitudinal sectional view of FIG. 5A, and FIG. 5C is a VC-VC sectional view of FIG. 5B. 図６Ａは実施形態４の生検針の平面図であり、図６Ｂは図６Ａの縦断面図である。6A is a plan view of the biopsy needle of Embodiment 4, and FIG. 6B is a longitudinal sectional view of FIG. 6A. 図７Ａは実施形態５の生検針の平面図であり、図７Ｂは図７Ａの縦断面図である。7A is a plan view of the biopsy needle of Embodiment 5, and FIG. 7B is a longitudinal sectional view of FIG. 7A. 図８Ａは実施形態６の生検針の平面図であり、図８Ｂは図８Ａの縦断面図であり、図８Cは図８ＢのVIIIＣ−VIIIＣ断面図である。8A is a plan view of the biopsy needle of Embodiment 6, FIG. 8B is a longitudinal sectional view of FIG. 8A, and FIG. 8C is a sectional view of VIIIC-VIIIC of FIG. 8B. 図９Aは実施形態７の生検針の平面図であり、図９Ｂは実施形態８の生検針の平面図である。FIG. 9A is a plan view of the biopsy needle of the seventh embodiment, and FIG. 9B is a plan view of the biopsy needle of the eighth embodiment. 図１０Ａは実施形態9の生検針の平面図であり、図１０Ｂは図１０Ａの縦断面図である。FIG. 10A is a plan view of the biopsy needle of Embodiment 9, and FIG. 10B is a longitudinal sectional view of FIG. 10A. 図１１ａは実施形態１０の生検針の平面図であり、図１１Ｂは図１１ａの縦断面図である。FIG. 11a is a plan view of the biopsy needle of Embodiment 10, and FIG. 11B is a longitudinal sectional view of FIG. 11a. 図１２Ａは実施形態１１の生検針の平面図であり、図１２Ｂは図１２Ａの縦断面図である。12A is a plan view of the biopsy needle of Embodiment 11, and FIG. 12B is a longitudinal sectional view of FIG. 12A. 図１３Ａは実施形態１２の生検針の平面図であり、図１３Ｂは図１３Ａの縦断面図である。FIG. 13A is a plan view of the biopsy needle of Embodiment 12, and FIG. 13B is a longitudinal sectional view of FIG. 13A. 図１４Ａは実施形態１３の生検針の平面図であり、図１４Ｂは図１４Ａの縦断面図である。14A is a plan view of the biopsy needle of Embodiment 13, and FIG. 14B is a longitudinal sectional view of FIG. 14A. 図１５Ａは従来例の生検針の平面図であり、図１５Ｂは図１５Ａの部分縦断面図である。15A is a plan view of a conventional biopsy needle, and FIG. 15B is a partial longitudinal sectional view of FIG. 15A.

以下、本発明の生検針を、各種実施形態を参照して詳細に説明する。但し、以下に示す実施形態は、本発明の技術思想を具体化するための生検針の例を示すものであって、本発明をこの実施形態に限定することを意図するものではない。本発明は、特許請求の範囲に示した技術思想を逸脱することなく種々の変更を行ったものにも均しく適用し得るものである。なお、この明細書における説明のために用いられた各図面においては、概略構成を模式的に示すものであるため、各部材について必ずしも実際の寸法に比例して表示されているものではない。   Hereinafter, the biopsy needle of the present invention will be described in detail with reference to various embodiments. However, the embodiment described below shows an example of a biopsy needle for embodying the technical idea of the present invention, and is not intended to limit the present invention to this embodiment. The present invention can be equally applied to various changes made without departing from the technical idea shown in the claims. In addition, in each drawing used for description in this specification, since schematic structure is shown typically, it does not necessarily display in proportion to an actual dimension about each member.

まず、ＥＵＳ−ＦＮＡで使用するための、本発明の生検針を超音波内視鏡装置に適用した例を、図１を用いて説明する。超音波内視鏡装置１は、先端側に超音波プローブ２を備えており、後端側には、図示省略したが、各種操作部及び表示部等が設けられており、この操作部を介して超音波プローブ２で撮像した画像データが表示部等に表示されるようになっている。光学式内視鏡装置は光学撮像センサーにより撮影された画像を表示するものであるため、高分解能であって生体組織の表面の観察には適しているが、深さ方向の観察はできない。それに対して超音波内視鏡は、光学式内視鏡装置よりも解像度は劣るが、深さ方向の観察が可能であるため、生体組織の深部の観察に適している。   First, an example in which the biopsy needle of the present invention for use in an EUS-FNA is applied to an ultrasonic endoscope apparatus will be described with reference to FIG. The ultrasonic endoscope apparatus 1 includes an ultrasonic probe 2 on the front end side, and although not shown on the rear end side, various operation units, a display unit, and the like are provided. Thus, image data picked up by the ultrasonic probe 2 is displayed on a display unit or the like. Since the optical endoscope apparatus displays an image taken by an optical imaging sensor, it has a high resolution and is suitable for observing the surface of a living tissue, but cannot observe in the depth direction. On the other hand, the ultrasonic endoscope is inferior in resolution to the optical endoscope apparatus, but can be observed in the depth direction, and is therefore suitable for observing a deep portion of a living tissue.

この超音波内視鏡装置１には鉗子口３が設けられており、操作部側からシース４を介して生検針１０が挿入され、この生検針１０は超音波プローブ２に対向する位置まで延在されている。また、超音波内視鏡装置１の鉗子口３の近傍には生検針偏角手段５が設けられており、この生検針偏角手段５により生検針１０と超音波内視鏡装置１との間のなす角度を適宜に変更することができるようになっている。なお、生検針１０は、硬質プラスチックで形成されており、操作部側まで延在している。そして、生検針１０の超音波内視鏡装置１の先端側の突出長さは操作部側で任意に調節可能となっている。   The ultrasonic endoscope apparatus 1 is provided with a forceps port 3, and a biopsy needle 10 is inserted through the sheath 4 from the operation unit side, and the biopsy needle 10 extends to a position facing the ultrasonic probe 2. Be present. Further, a biopsy needle deflection means 5 is provided in the vicinity of the forceps opening 3 of the ultrasonic endoscope apparatus 1, and the biopsy needle 10 and the ultrasound endoscope apparatus 1 are connected by the biopsy needle deflection angle means 5. The angle formed between them can be changed as appropriate. The biopsy needle 10 is made of hard plastic and extends to the operation unit side. The protruding length of the biopsy needle 10 on the distal end side of the ultrasonic endoscope apparatus 1 can be arbitrarily adjusted on the operation unit side.

このような構成の超音波内視鏡装置１を用いて，例えば胃６の粘膜層６ａと粘膜下層６ｂとの間に存在している粘膜下腫瘍組織６ｃから腫瘍組織片を採取する状態が図１Ｂに示されている。当初、生検針１０を超音波内視鏡装置１内に収納した状態で、画像を注視しながら胃６内の採取すべき粘膜下腫瘍組織６ｃが存在する位置に超音波プローブ２対向するように、超音波内視鏡装置１を挿入する。次いで、操作部から操作することにより、生検針１０を押出すとともに生検針１０を適切に偏角させ、生検針１０の先端が粘膜下腫瘍組織６ｃ内の所定位置に達するまで穿刺する。   Using the thus configured ultrasonic endoscope apparatus 1, for example, a state in which a tumor tissue piece is collected from a submucosal tumor tissue 6 c existing between the mucosal layer 6 a and the submucosal layer 6 b of the stomach 6 is illustrated. 1B. Initially, in a state where the biopsy needle 10 is housed in the ultrasound endoscope apparatus 1, the ultrasound probe 2 is opposed to a position where the submucosal tumor tissue 6c to be collected in the stomach 6 is present while gazing at the image. Then, the ultrasonic endoscope apparatus 1 is inserted. Next, by operating from the operation unit, the biopsy needle 10 is pushed out and the biopsy needle 10 is appropriately deflected, and puncture is performed until the tip of the biopsy needle 10 reaches a predetermined position in the submucosal tumor tissue 6c.

次いで、生検針１０の内部を負圧にすることによって粘膜下腫瘍組織６ｃの一部を生検針１０内に収納し、所定の切断手段を作動させて生検針１０の先端近傍に位置する腫瘍組織を切断し、生検針１０内に腫瘍組織片を採取する。その後、生検針１０自体を超音波内視鏡装置１から抜き去ることにより所定の腫瘍組織片を回収することができる。このようにして回収されたた腫瘍組織片は、生検部門へ回され、生検部門で適宜に細胞診断が行われる。このような粘膜下腫瘍の場合には、光学内視鏡装置で明瞭に観察が可能であるため、光学内視鏡装置に対して生検針を組み合わせることは一応可能である。   Next, a part of the submucosal tumor tissue 6c is accommodated in the biopsy needle 10 by applying a negative pressure to the inside of the biopsy needle 10, and a predetermined cutting means is operated to activate the tumor tissue located near the tip of the biopsy needle 10. And a tumor tissue piece is collected in the biopsy needle 10. Thereafter, a predetermined tumor tissue piece can be collected by removing the biopsy needle 10 itself from the ultrasonic endoscope apparatus 1. The tumor tissue piece collected in this manner is sent to the biopsy department, and cytodiagnosis is appropriately performed in the biopsy department. In the case of such a submucosal tumor, since it can be clearly observed with an optical endoscope device, it is possible to combine a biopsy needle with the optical endoscope device.

しかしながら、図１Ｃに示したような、例えば膵臓７の内部に生じた膵臓腫瘍８を十二指腸９内に挿入した光学内視鏡装置により検出し、膵臓腫瘍８の組織を採取することは、病変部が十二指腸の筋層９ｃ、粘膜下層９ｂ及び粘膜層９ａを介して十二指腸９側から検出できない限り、困難である。それに対し、超音波内視鏡装置１によれば、十二指腸９の粘膜層９ａ側から膵臓腫瘍８の位置及び大きさを検知することが可能なため、有効に膵臓腫瘍８に対して生検針１０を穿刺することができ、所定の膵臓腫瘍８の組織片を回収することができる。   However, as shown in FIG. 1C, for example, the detection of a pancreatic tumor 8 generated inside the pancreas 7 with an optical endoscope device inserted into the duodenum 9 and collecting the tissue of the pancreatic tumor 8 However, unless it can be detected from the duodenum 9 side through the duodenal muscle layer 9c, the submucosa 9b and the mucosa layer 9a, it is difficult. On the other hand, according to the ultrasonic endoscope apparatus 1, since the position and size of the pancreatic tumor 8 can be detected from the mucosal layer 9a side of the duodenum 9, the biopsy needle 10 for the pancreatic tumor 8 can be effectively used. Can be punctured, and a tissue piece of a predetermined pancreatic tumor 8 can be collected.

［実施形態１］
実施形態１の生検針１０を、図２を用いて説明する。なお、図２Ａは実施形態１の生検針の平面図であり、図２Ａは図１の縦断面図である。 [Embodiment 1]
The biopsy needle 10 of Embodiment 1 is demonstrated using FIG. 2A is a plan view of the biopsy needle of Embodiment 1, and FIG. 2A is a longitudinal sectional view of FIG.

実施形態１の生検針１０は、中空円筒状の針部１１の一方側の端部に、端部が斜めに切断された注射針形状の開口１２が形成されている。注射針形状の開口１２の開口壁１３には、ほぼ中央部に、環状の溝１４が形成されている。この環状の溝１４の深さは後述するワイヤー１５の径と同じかそれよりも僅かに深くされており、ワイヤー１５が開口壁１３よりも突出しないようになされている。また、環状の溝１４の幅はワイヤー１５の径と同じか僅かに大きくされている。   In the biopsy needle 10 of the first embodiment, an injection needle-shaped opening 12 whose end is cut obliquely is formed at one end of a hollow cylindrical needle 11. An annular groove 14 is formed in the opening wall 13 of the injection needle-shaped opening 12 substantially at the center. The depth of the annular groove 14 is the same as or slightly deeper than the diameter of the wire 15 to be described later, so that the wire 15 does not protrude beyond the opening wall 13. The width of the annular groove 14 is the same as or slightly larger than the diameter of the wire 15.

注射針形状の開口１２の開口壁１３の後端側には、ワイヤー１５の２本分の幅で、ワイヤー１５の径と同じか僅かに深い、短溝１６が、環状の溝１４の後端側と接続するように形成されている。また、中空円筒状の針部１１の側面には、短溝１６と同じ深さ及び同じ幅の直線状の溝１７が形成されており、この直線状の溝１７は中空円筒状の針部１１の後端部（図示省略）まで延在されている。すなわち、環状の溝１４、短溝１６及び直線状の溝１７はそれぞれ同一の深さとされ、短溝１６及び直線状の溝１７は同一の幅とされ、全てつながるように形成されている。   On the rear end side of the opening wall 13 of the needle-shaped opening 12, a short groove 16 having a width corresponding to two wires 15 and the same as or slightly deeper than the diameter of the wire 15 is provided at the rear end of the annular groove 14. It is formed to connect with the side. Further, a linear groove 17 having the same depth and width as the short groove 16 is formed on the side surface of the hollow cylindrical needle portion 11, and the linear groove 17 is formed in the hollow cylindrical needle portion 11. It extends to the rear end (not shown). That is, the annular groove 14, the short groove 16, and the linear groove 17 have the same depth, and the short groove 16 and the linear groove 17 have the same width, and are formed so as to be all connected.

そして、環状の溝１４内にワイヤー１５の中間部がループ状に嵌合されており、ワイヤー１５の両端側は互いに合流されて、短溝１６及び直線状の溝１７を経て、図示省略した超音波内視鏡装置の操作部まで延在されて、操作部より外部に取り出されている。なお、ワイヤー１５としては、ナイロン糸やテグス、ステンレス鋼系、チタン系ないし炭素繊維系の糸、タンパク質製の合成蜘蛛の糸等、細径かつ柔軟性がありながら高強度のものを適宜選択して使用し得る。そして、少なくとも環状の溝１４内に嵌合されたワイヤー１５は、易剥離性接着剤（図示省略）によって、環状の溝１４内に固定されている。このワイヤー１５が本発明の切断手段に対応する。   An intermediate portion of the wire 15 is fitted in a loop shape in the annular groove 14, and both end sides of the wire 15 are joined to each other, passed through the short groove 16 and the linear groove 17, and are not illustrated. It extends to the operation unit of the sonic endoscope apparatus and is taken out from the operation unit. As the wire 15, a nylon yarn, Teggs, stainless steel, titanium or carbon fiber yarn, protein synthetic silk thread, etc., having a small diameter and flexibility but having a high strength are appropriately selected. Can be used. The wire 15 fitted in at least the annular groove 14 is fixed in the annular groove 14 by an easily peelable adhesive (not shown). This wire 15 corresponds to the cutting means of the present invention.

なお、易剥離性接着剤としては、生検針１０を組織内に穿刺した際にはワイヤー１５が注射針形状の開口１２の環状の溝１４から剥離せず、ワイヤー１５を両端側から引っ張った場合にワイヤー１５が注射針形状の開口１２の環状の溝１４から外れていく程度の接着性があり、かつ生体親和性が良好なものであればよく、例えば水糊、ポリビニルアルコール、ポリビニルピロリドン等が挙げられる。   As an easily peelable adhesive, when the biopsy needle 10 is punctured into the tissue, the wire 15 does not peel from the annular groove 14 of the injection needle-shaped opening 12, and the wire 15 is pulled from both ends. As long as the wire 15 has adhesiveness enough to be removed from the annular groove 14 of the needle-shaped opening 12 and has good biocompatibility, for example, water paste, polyvinyl alcohol, polyvinylpyrrolidone, etc. Can be mentioned.

この生検針１０の使用方法は、以下のとおりである。まず、図１Ｂないし図１Ｃに示したように、超音波内視鏡装置１を所定位置まで挿入する。生検針１０の中空円筒状の針部１１内に開口が形成されていない内針（図示省略）を挿入し、生検針１０の注射針形状の開口１２内に生体組織が侵入しない状態とする。この状態の生検針１０と内針とを同時に生体組織に穿刺し、目的とする部位の近傍に位置するようにする。その後、内針を固定した状態で生検針１０をさらに目的とする部位まで挿入するか、あるいは、内針を少し引いた後に生検針１０をさらに目的とする部位まで挿入する。そうすると、生検針１０の中空円筒状の針部１１内に生体組織が入り込む。   The usage method of this biopsy needle 10 is as follows. First, as shown in FIGS. 1B to 1C, the ultrasonic endoscope apparatus 1 is inserted to a predetermined position. An inner needle (not shown) in which no opening is formed is inserted into the hollow cylindrical needle portion 11 of the biopsy needle 10 so that the living tissue does not enter the injection needle-shaped opening 12 of the biopsy needle 10. The biopsy needle 10 and the inner needle in this state are simultaneously punctured into the living tissue so as to be positioned in the vicinity of the target site. Thereafter, the biopsy needle 10 is further inserted to the target site while the inner needle is fixed, or the biopsy needle 10 is further inserted to the target site after the inner needle is slightly pulled. Then, the living tissue enters the hollow cylindrical needle portion 11 of the biopsy needle 10.

この状態では、生検針１０の中空円筒状の針部１１内に入り込んだ生体組織のうち、生検針１０の中空円筒状の針部１１の内部壁１１ａに接している側面は切断されているが、注射針形状の開口１２側に位置している生体組織は切断されていない。この状態のまま生検針１０を内針とともに引き抜くと、中空円筒状の針部１１の内部が負圧になることに起因して生体組織の深部が引きちぎられて中空円筒状の針部１１内に残留することがあるが、多くは中空円筒状の針部１１から抜け出てしまうため、生体組織の回収率が低くなる。   In this state, of the living tissue that has entered the hollow cylindrical needle portion 11 of the biopsy needle 10, the side surface that is in contact with the inner wall 11a of the hollow cylindrical needle portion 11 of the biopsy needle 10 is cut. The living tissue located on the injection needle-shaped opening 12 side is not cut. When the biopsy needle 10 is pulled out together with the inner needle in this state, the deep portion of the living tissue is torn off due to the negative pressure inside the hollow cylindrical needle portion 11 and into the hollow cylindrical needle portion 11. Although it may remain, in many cases, it will come out of the hollow cylindrical needle part 11, so that the recovery rate of the living tissue is lowered.

そこで、実施形態１の生検針１０では、生検針１０の中空円筒状の針部１１内に生体組織が入り込んだ後、ワイヤー１５の両端側を同時に、ないし細かく往復動させながら牽引する操作を行う。そうすると、ワイヤー１５は他方の端部側へ引っ張られるに従って注射針形状の開口１２の環状の溝１４から徐々に離脱してループの径が小さくなり、それに伴って注射針形状の開口１２の環状の溝１４に沿って生体組織の深部が切断されていく。そして、ワイヤー１５のループが閉じた状態では注射針形状の開口１２部分に位置している生体組織は実質的に全て切断された状態となる。   Therefore, in the biopsy needle 10 of the first embodiment, after the living tissue enters the hollow cylindrical needle portion 11 of the biopsy needle 10, an operation of pulling while simultaneously reciprocating both ends of the wire 15 is performed. . Then, the wire 15 is gradually detached from the annular groove 14 of the injection needle-shaped opening 12 as the wire 15 is pulled toward the other end side, and the diameter of the loop is reduced, and accordingly, the annular shape of the injection needle-shaped opening 12 is reduced. A deep portion of the living tissue is cut along the groove 14. In the state where the loop of the wire 15 is closed, the living tissue located at the injection needle-shaped opening 12 is substantially completely cut.

この状態で、生検針１０を内針とともに引き抜くと、生体組織が切断されているために、採取された生体組織片は中空円筒状の針部１１内に留まったまま取り出すことができるので、生体組織片の回収率が高くなる。なお、生検針１０を内針とともに引き抜く際に、先に内針を引き抜いていてから注射器をつけて吸引をかけると、中空円筒状の針部１１の内部が陰圧になるので、生体組織片が中空円筒状の針部１１の奥側に位置するようになり、生体組織片の回収率が向上する。その際、注射器の引く容量によって陰圧の強さを調節できるが、実施形態１の生検針１０では生体組織が切断されているために、従来法に比べ弱い陰圧で組織を回収することが可能になる。したがって、生体組織がバラバラに分断される確率も低くなる。   In this state, when the biopsy needle 10 is pulled out together with the inner needle, since the living tissue is cut, the collected living tissue piece can be taken out while remaining in the hollow cylindrical needle portion 11. The collection rate of the tissue piece is increased. When the biopsy needle 10 is pulled out together with the inner needle, if the inner needle is first pulled out and then a syringe is attached and suction is applied, the inside of the hollow cylindrical needle portion 11 becomes negative pressure. Is positioned on the inner side of the hollow cylindrical needle portion 11, and the recovery rate of the biological tissue piece is improved. At that time, the strength of the negative pressure can be adjusted by the volume of the syringe drawn. However, since the biological tissue is cut by the biopsy needle 10 of the first embodiment, the tissue can be collected with a weak negative pressure compared to the conventional method. It becomes possible. Therefore, the probability that the living tissue is divided apart is also reduced.

なお、実施形態１の生検針１０は、そのまま周知の注射筒に接続して単独で用いてもよく、あるいは超音波内視鏡装置だけでなく、光学内視鏡装置と組み合わせて用いることも可能である。実施形態１の生検針１０を超音波内視鏡装置だけでなく、光学内視鏡装置と組み合わせて用いる場合には、それぞれの操作部と生検針１０の注射針形状の開口１２の部分までの長さが非常に長くなるが、このような状態であっても、生検針１０を生体組織の目的とする部位まで穿刺した後にワイヤー１５を操作部側から牽引すると、注射針形状の開口１２部分に位置している生体組織を容易に切断することができるようになる。特に、ワイヤー１５の両端側が操作部まで延在されているので、ワイヤー１５の両端側をそれぞれ異なる方向に細かく往復動させることによりワイヤー１５をのこぎりのように作動させることができるため、生体組織の切断が容易となる。   In addition, the biopsy needle 10 of Embodiment 1 may be used as it is by being connected to a known syringe as it is, or may be used in combination with not only an ultrasonic endoscope apparatus but also an optical endoscope apparatus. It is. When the biopsy needle 10 of the first embodiment is used in combination with not only an ultrasonic endoscope apparatus but also an optical endoscope apparatus, the operation section and the portion of the biopsy needle 10 corresponding to the injection needle-shaped opening 12 are used. Even in such a state, if the wire 15 is pulled from the operation unit side after puncturing the biopsy needle 10 to the target site of the living tissue, the injection needle-shaped opening 12 portion It becomes possible to easily cut the living tissue located in the area. In particular, since both ends of the wire 15 are extended to the operation portion, the wire 15 can be actuated like a saw by reciprocating both ends of the wire 15 in different directions. Cutting becomes easy.

また、実施形態１では、生検針１０と内針とを組み合わせて用いた例を示した。このような構成を採用すると、生検針１０の注射針形状の開口１２が所望の深さに到達するまでは生検針１０の中空円筒状の針部１１内に侵入し難くなるので、目的とする生体組織片を容易に採取することができるようになる。なお、表面の生体組織片を採取する場合には、内針を用いることなく生検針１０を単独で用いてもよいが、この場合においても内針を用いることによって吸引生検と同様の作用効果を奏させることができるので、生体組織片の採取効率が向上する。   Moreover, in Embodiment 1, the example which used the biopsy needle 10 and the inner needle in combination was shown. By adopting such a configuration, it is difficult to enter the hollow cylindrical needle portion 11 of the biopsy needle 10 until the injection needle-shaped opening 12 of the biopsy needle 10 reaches a desired depth. Biological tissue pieces can be easily collected. In the case of collecting a biological tissue piece on the surface, the biopsy needle 10 may be used alone without using the inner needle. In this case, the same effect as the suction biopsy is obtained by using the inner needle. Therefore, the collection efficiency of the biological tissue piece is improved.

なお、実施形態１の生検針１０においては、注射針形状の開口１２の開口壁１３の後端側には短溝１６を環状の溝１４の後端側と接続するように形成した例を示したが、この短溝１６は生検針１０の作動に必ずしも必要な構成ではない。しかしながら、この短溝１６がないと、ワイヤー１５が注射針形状の開口１２の開口壁１３の後端側を乗り越える部分が開口壁１３の表面から突出するため、生検針１０の穿刺時に抵抗が大きくなったり、ワイヤー１５がずれたりする可能性がある。それに対し、短溝１６を設けると、ワイヤー１５が注射針形状の開口１２の開口壁１３の後端側を乗り越える部分で開口壁１３の表面から突出することがなくなり、生検針１０の穿刺時の抵抗が小さくなるとともに、ワイヤー１５の両端側が短溝１６内に嵌合・固定されているので、生検針１０の穿刺時にワイヤー１５がずれることがなくなる。   In the biopsy needle 10 of the first embodiment, an example is shown in which a short groove 16 is formed on the rear end side of the opening wall 13 of the injection needle-shaped opening 12 so as to be connected to the rear end side of the annular groove 14. However, the short groove 16 is not necessarily required for the operation of the biopsy needle 10. However, if this short groove 16 is not present, the portion where the wire 15 rides over the rear end side of the opening wall 13 of the injection needle-shaped opening 12 protrudes from the surface of the opening wall 13, so that resistance is large when the biopsy needle 10 is punctured. Or the wire 15 may be displaced. On the other hand, when the short groove 16 is provided, the wire 15 does not protrude from the surface of the opening wall 13 at the portion over the rear end side of the opening wall 13 of the injection needle-shaped opening 12, and at the time of puncture of the biopsy needle 10 While the resistance is reduced, both ends of the wire 15 are fitted and fixed in the short groove 16, so that the wire 15 is not displaced when the biopsy needle 10 is punctured.

また、実施形態１の生検針１０においては、中空円筒状の針部１１の側面に短溝１６と同じ深さ及び同じ幅の直線状の溝１７を形成した例を示したが、この直線状の溝１７も生検針１０の作動には必ずしも必要な構成ではない。しかしながら、このような直線状の溝１７を設けると、ワイヤー１５の両端側がそれぞれ中空円筒状の針部１１の側面から突出しないようにできるので、生検針１０を内視鏡装置の鉗子口内に挿通する際に抵抗が少なくなり、スムーズに挿入することができるようになる。なお、直線状の溝１７内に配置されているワイヤー１５は、直線状の溝１７内で容易に摺動可能させることができる程度に嵌合されていればよい。   Moreover, in the biopsy needle 10 of Embodiment 1, although the example which formed the linear groove | channel 17 of the same depth and the same width as the short groove 16 was shown in the side surface of the hollow cylindrical needle part 11, this linear shape was shown. The groove 17 is not necessarily required for the operation of the biopsy needle 10. However, if such a straight groove 17 is provided, both ends of the wire 15 can be prevented from projecting from the side surfaces of the hollow cylindrical needle part 11, so that the biopsy needle 10 is inserted into the forceps port of the endoscope apparatus. When doing so, the resistance is reduced, and it can be inserted smoothly. In addition, the wire 15 arrange | positioned in the linear groove | channel 17 should just be fitted to such an extent that it can be made to slide easily in the linear groove | channel 17. FIG.

さらに、実施形態１の生検針１０としては、中空円筒状の針部１１の注射針形状の開口１２として、図２Ｂに示したように、側面視直線状となっているものを用いた例を示したが、これに限らず側面視凹状となっているいわゆるメンギーニ形状となっているものも使用することができる。このようなメンギーニ形状となっているものを使用すると、本質的に側面視直線状となっているものよりも穿刺時の抵抗が小さくなるので、より良好に生体組織片を採取することができるようになる。なお、中空円筒状の針部１１の注射針形状の開口１２の形状がメンギーニ形状となっているものは、以下に示す変形例１及び２、実施形態２〜１３の場合においても同様に採用することができる。   Furthermore, as the biopsy needle 10 of the first embodiment, as shown in FIG. 2B, an example in which the needle-shaped opening 12 of the hollow cylindrical needle portion 11 is linear in a side view is used. Although shown, the present invention is not limited to this, and a so-called Menghini shape having a concave shape in a side view can also be used. When such a Menghini shape is used, the resistance at the time of puncture is smaller than that essentially having a linear shape in a side view, so that a biological tissue piece can be collected better. become. In addition, what the shape of the injection needle-shaped opening 12 of the hollow cylindrical needle part 11 has a Menghini shape is similarly adopted in the case of the following modifications 1 and 2 and Embodiments 2 to 13. be able to.

［変形例１及び２］
ここで、実施形態１の生検針１０の変形例を、図３を用いて説明する。なお、図３Ａは実施形態１の生検針の第１変形例の平面図であり、図３Ｂは同じく第２変形例の平面図である。また、図３Ａ及び図３Ｂにおいては、図２Ａ及び図２Ｂに示した実施形態１の生検針１０と同じ構成部分には同じの参照符号を付与してその詳細な説明は省略する。 [Modifications 1 and 2]
Here, the modification of the biopsy needle 10 of Embodiment 1 is demonstrated using FIG. 3A is a plan view of a first modification of the biopsy needle of Embodiment 1, and FIG. 3B is a plan view of the second modification. 3A and 3B, the same components as those of the biopsy needle 10 of Embodiment 1 shown in FIGS. 2A and 2B are assigned the same reference numerals, and detailed descriptions thereof are omitted.

実施形態１の生検針１０では、注射針形状の開口１２の開口壁１３のほぼ中央部に環状の溝１４を形成した例を示したが、変形例１の生検針１０Ａは、図３Ａに示したように、環状の溝１４を注射針形状の開口１２の開口壁１３の外部壁に形成したものである。同じく、変形例２の生検針１０Ｂは、図３Ｂに示したように、環状の溝１４を注射針形状の開口１２の開口壁１３の内周側に形成したものである。変形例１及び２のいずれの生検針１０Ａ、１０Ｂであっても、実質的に実施形態１の生検針の場合と同様の作用・効果を奏する。   In the biopsy needle 10 of the first embodiment, an example in which the annular groove 14 is formed in the substantially central portion of the opening wall 13 of the injection needle-shaped opening 12 is shown, but the biopsy needle 10A of the first modification is shown in FIG. 3A. As described above, the annular groove 14 is formed on the outer wall of the opening wall 13 of the needle-shaped opening 12. Similarly, as shown in FIG. 3B, the biopsy needle 10 </ b> B of Modification 2 has an annular groove 14 formed on the inner peripheral side of the opening wall 13 of the injection needle-shaped opening 12. Any of the biopsy needles 10A and 10B of the modified examples 1 and 2 has substantially the same operations and effects as those of the biopsy needle of the first embodiment.

［実施形態２］
実施形態２の生検針１０Ｃを、図４を用いて説明する。なお、図４Ａは実施形態２の生検針１０Ｃの平面図であり、図４Ｂは図４Ａの縦断面図である。また、図４Ａ及び図４Ｂにおいては、図２Ａ及び図２Ｂに示した実施形態１の生検針１０と同じ構成部分には同様の参照符号を付与してその詳細な説明は省略する。 [Embodiment 2]
A biopsy needle 10C according to the second embodiment will be described with reference to FIG. 4A is a plan view of the biopsy needle 10C of Embodiment 2, and FIG. 4B is a longitudinal sectional view of FIG. 4A. 4A and 4B, the same components as those of the biopsy needle 10 of Embodiment 1 shown in FIGS. 2A and 2B are denoted by the same reference numerals, and detailed description thereof is omitted.

実施形態１の生検針１０では、注射針形状の開口１２の開口壁１３のほぼ中央部に環状の溝１４を形成した例を示したが、実施形態２の生検針１０Ｃは、環状の溝１４Ｃを生検針１０Ｃの中空円筒状の針部１１の内部壁１１ａに形成したものである。この環状の溝１４Ｃの最先端部１４ａは、注射針形状の開口１２の先端側１２ａから僅かに内部に入った箇所から注射針形状の開口１２の後端側１２ｂに対応する箇所まで設けられている。   In the biopsy needle 10 of the first embodiment, an example in which the annular groove 14 is formed in the substantially central portion of the opening wall 13 of the injection needle-shaped opening 12 is shown. However, the biopsy needle 10C of the second embodiment has an annular groove 14C. Is formed on the inner wall 11a of the hollow cylindrical needle portion 11 of the biopsy needle 10C. The most distal end portion 14a of the annular groove 14C is provided from a position slightly inside from the distal end side 12a of the injection needle-shaped opening 12 to a position corresponding to the rear end side 12b of the injection needle-shaped opening 12. Yes.

この場合の短溝１６ａは、注射針形状の開口１２の開口壁１３における後端側を横断するように形成されている。このような構成を備える実施形態２の生検針１０Ｃによれば、中空円筒状の針部１１の開口１２側から見た場合、ワイヤー１５が中空円筒状の針部１１の内部壁１１ａ側に突出することがなくなるとともに、注射針形状の開口１２の開口壁１３には短溝１６ａ以外に何等の構成も備えていないため、穿刺時の挿入抵抗が小さくなって生体組織片の採取効率が向上する。   In this case, the short groove 16a is formed so as to cross the rear end side of the opening wall 13 of the injection needle-shaped opening 12. According to the biopsy needle 10C of Embodiment 2 having such a configuration, when viewed from the opening 12 side of the hollow cylindrical needle portion 11, the wire 15 protrudes toward the inner wall 11a side of the hollow cylindrical needle portion 11. In addition, since the opening wall 13 of the injection needle-shaped opening 12 is not provided with any configuration other than the short groove 16a, the insertion resistance at the time of puncture is reduced, and the collection efficiency of the biological tissue piece is improved. .

また、実施形態２の生検針１０Ｃにおいては、中空円筒状の針部１１の側面に短溝１６と同じ深さ及び同じ幅の直線状の溝１７を形成した例を示したが、実施形態１の生検針１０の場合と同様に、この直線状の溝１７も生検針１０Ｃの作動には必ずしも必要な構成ではない。   In the biopsy needle 10C of the second embodiment, an example in which the linear groove 17 having the same depth and the same width as the short groove 16 is formed on the side surface of the hollow cylindrical needle portion 11 is shown. As in the case of the biopsy needle 10, the linear groove 17 is not necessarily required for the operation of the biopsy needle 10C.

［実施形態３］
実施形態３の生検針１０Ｄを、図５を用いて説明する。なお、図５Ａは実施形態３の生検針の平面図であり、図５Ｂは図５Ａの縦断面図であり、図５Cは図５ＢのＶＣ−ＶＣ断面図である。また、図５Ａ〜図５Ｃにおいては、図４Ａ及び図４Ｂに示した実施形態２の生検針１０Ｃと同じ構成部分には同様の参照符号を付与してその詳細な説明は省略する。 [Embodiment 3]
A biopsy needle 10D of Embodiment 3 will be described with reference to FIG. 5A is a plan view of the biopsy needle of Embodiment 3, FIG. 5B is a longitudinal sectional view of FIG. 5A, and FIG. 5C is a VC-VC sectional view of FIG. 5B. 5A to 5C, the same components as those of the biopsy needle 10C of the second embodiment shown in FIGS. 4A and 4B are denoted by the same reference numerals, and detailed description thereof is omitted.

実施形態２の生検針１０Ｃでは、環状の溝１４Ｃを注射針形状の開口１２の先端側１２ａから僅かに内部に入った箇所から注射針形状の開口１２の後端側１２ｂに対応する箇所まで設けられているが、実施形態３の生検針１０Ｄでは環状の溝１４Ｃが注射針形状の開口１２の先端側１２ａから僅かに内部に入った箇所から注射針形状の開口１２の後端側から僅かに入った箇所まで設けられている。そして、実施形態３の生検針１０Ｄでは、中空の針部１１の外部壁に短溝１６及び直線状の溝１７は設けず、また、中空の針部１１の内部壁１１ａに、注射針形状の開口１２の後端側から僅かに入った箇所にワイヤー１５よりも僅かに大径のＵ字状ないしＪ字状（以下、単に「Ｕ字状」ということがある。）の貫通孔１７ｂが設けられており、また、中空の針部１１の内部壁１１ａに、Ｕ字状の貫通孔１７ｂに連なり、中空の針部１１の後端側まで延在する溝１７ａが形成されている。   In the biopsy needle 10C of the second embodiment, an annular groove 14C is provided from a position slightly inside from the distal end side 12a of the injection needle-shaped opening 12 to a position corresponding to the rear end side 12b of the injection needle-shaped opening 12. However, in the biopsy needle 10D of the third embodiment, the annular groove 14C is slightly from the rear end side of the injection needle-shaped opening 12 from the position where the annular groove 14C enters slightly from the distal end side 12a of the injection needle-shaped opening 12. It is provided to the place where it entered. In the biopsy needle 10D of the third embodiment, the short groove 16 and the straight groove 17 are not provided on the outer wall of the hollow needle portion 11, and the injection needle shape is formed on the inner wall 11a of the hollow needle portion 11. A U-shaped or J-shaped through-hole 17b having a diameter slightly larger than that of the wire 15 (hereinafter sometimes simply referred to as “U-shaped”) is provided at a position slightly inserted from the rear end side of the opening 12. In addition, a groove 17a is formed in the inner wall 11a of the hollow needle portion 11 so as to continue to the U-shaped through hole 17b and extend to the rear end side of the hollow needle portion 11.

なお、この貫通孔１７ｂは、環状の溝１４Ｃ側から見ると直線状とみることもできるが、ここでは図５Ｂの記載から見て、あえてＵ字状ないしＪ字状と表現している。また、このＵ字状ないしＪ字状の貫通孔１７ｂに換えて、環状の溝１４Ｃから中空円筒状の針部１１の外部壁に向けて第１の貫通孔を形成し、さらに外部壁から内部壁１１ａに向けて第２の貫通孔を形成し、ワイヤー１５を環状の溝１４Ｃから第１の貫通孔を経て外部壁側へ出し、さらに外部壁側から第２の貫通孔を経て中空円筒状の針部１１の内部壁１１ａ側に至るようにすることも可能である。しかしながら、このような構成を採用すると、ワイヤー１５の摩擦抵抗が大きくなるため、ワイヤー１５が外部壁側に露出しないようにする方が好ましい。   The through-hole 17b can be seen as a straight line when viewed from the annular groove 14C side, but here it is deliberately expressed as a U-shape or J-shape when viewed from the description of FIG. 5B. Further, instead of the U-shaped or J-shaped through-hole 17b, a first through-hole is formed from the annular groove 14C toward the outer wall of the hollow cylindrical needle portion 11, and further from the outer wall to the inner wall. A second through hole is formed toward the wall 11a, and the wire 15 is led out from the annular groove 14C through the first through hole to the outer wall side, and further from the outer wall side through the second through hole to a hollow cylindrical shape. It is also possible to reach the inner wall 11 a side of the needle portion 11. However, when such a configuration is adopted, the frictional resistance of the wire 15 increases, so it is preferable to prevent the wire 15 from being exposed to the outer wall side.

このＵ字状の貫通孔１７ｂは、一方の端部が中空の針部１１の内部壁１１ａ側に開通し、中空の針部１１の壁の内部を通って、他方側の端部が前述した一方の端部とは後端側の異なる位置で中空の針部１１の内部壁１１ａ側に開通している。そして、ワイヤー１５は、中間部を環状の溝１４Ｃ内に嵌合・固定し、両端部を揃えてＵ字状の貫通孔１７ｂを通され、次いで中空の針部１１の内部壁に形成された溝１７ａ内に嵌合・固定されて中空の針部１１の後端側まで延在されたものである。   The U-shaped through-hole 17b has one end opened to the inner wall 11a side of the hollow needle portion 11, passed through the inside of the wall of the hollow needle portion 11, and the other end portion described above. One end portion is opened to the inner wall 11a side of the hollow needle portion 11 at a position different from the rear end side. And the wire 15 was formed and fitted in the inner wall of the hollow needle part 11 by fitting and fixing the middle part in the annular groove 14C, aligning both ends and passing through the U-shaped through hole 17b. It is fitted and fixed in the groove 17 a and extends to the rear end side of the hollow needle portion 11.

中空の針部１１の内径は小さく、また、中空の針部１１には生検針１０Ｄの使用時に内針が挿入されるが、中空の針部１１の内面と内針との間のすき間も非常に小さくなるので、通常はワイヤーと中空の針部の内面及び内針の外面との間の摩擦も大きくなり、ワイヤーの操作性が悪化する。それに対し、実施形態３の生検針１０Ｄによれば、中空の針部１１の内部壁１１ａに注射針形状の開口１２の後端側１２ｂから中空の針部１１の後端側まで直線状の溝１７ａが形成されているので、この溝１７ａ内にワイヤー１５を配置することができ、しかも、中空円筒状の針部１１の開口１２側から見た場合、中空の針部１１の内部壁１１ａ側には一切のワイヤー１５が突出しないようにできるので、ワイヤー１５の摩擦が小さくなって操作性がより良好となるという付加的な効果も奏するようになる。また、ワイヤー１５の両端部を牽引する際には、Ｕ字状の貫通孔が支点となってワイヤー１５のループの径が小さくなるので、環状の溝１４Ｃに沿って中空の針部１１内に入り込んだ生体組織を効率よく切断することができるようになる。   The inner diameter of the hollow needle portion 11 is small, and the inner needle is inserted into the hollow needle portion 11 when the biopsy needle 10D is used, but the clearance between the inner surface of the hollow needle portion 11 and the inner needle is also very large. Therefore, the friction between the wire and the inner surface of the hollow needle portion and the outer surface of the inner needle is also increased, and the operability of the wire is deteriorated. On the other hand, according to the biopsy needle 10D of the third embodiment, a linear groove is formed on the inner wall 11a of the hollow needle portion 11 from the rear end side 12b of the injection needle-shaped opening 12 to the rear end side of the hollow needle portion 11. 17a is formed, the wire 15 can be arranged in the groove 17a, and when viewed from the opening 12 side of the hollow cylindrical needle part 11, the inner wall 11a side of the hollow needle part 11 Since it is possible to prevent any wire 15 from protruding, there is an additional effect that the friction of the wire 15 is reduced and the operability is improved. Further, when pulling both ends of the wire 15, the U-shaped through hole serves as a fulcrum to reduce the diameter of the loop of the wire 15, so that the hollow needle portion 11 extends along the annular groove 14 </ b> C. It becomes possible to efficiently cut the living tissue that has entered.

なお、実施形態３の生検針１０Ｄにおいて、中空の針部１１の内部壁１１ａに直線状の溝１７ａを形成しない場合には、図示省略した内針の外部壁に直線状の溝を形成すると、実質的に中空の針部１１の内部壁１１ａに直線状の溝１７ａを形成した場合と同様の効果を奏することができる。   In the biopsy needle 10D of the third embodiment, when the linear groove 17a is not formed on the inner wall 11a of the hollow needle portion 11, if a linear groove is formed on the outer wall of the inner needle (not shown), The same effect as when the linear groove 17a is formed in the inner wall 11a of the substantially hollow needle portion 11 can be obtained.

［実施形態４］
実施形態４の生検針１０Ｅを、図６を用いて説明する。なお、図６Ａは実施形態４の生検針の平面図であり、図６Ｂは図６Ａの縦断面図である。また、図６Ａ及び図６Ｂにおいては、図２Ａ及び図２Ｂに示した実施形態１の生検針１０と同じ構成部分には同様の参照符号を付与してその詳細な説明は省略する。 [Embodiment 4]
A biopsy needle 10E according to the fourth embodiment will be described with reference to FIG. 6A is a plan view of the biopsy needle of Embodiment 4, and FIG. 6B is a longitudinal sectional view of FIG. 6A. 6A and 6B, the same components as those of the biopsy needle 10 of Embodiment 1 shown in FIGS. 2A and 2B are denoted by the same reference numerals, and detailed description thereof is omitted.

実施形態４の生検針１０Ｅは、実施形態１の生検針１０において、実質的に直線状の溝１７を削除し、短溝１６が中空円筒状の針部１１の側面と交わる場所の近傍に中空の針部１１の側壁を貫通する貫通孔１８を形成し、ワイヤー１５の両端側を、短溝１６を経て直ちに貫通孔１８を挿通させ、中空円筒状の針部１１の内部壁１１ａに沿って操作部まで延在させた点である。   The biopsy needle 10E according to the fourth embodiment is substantially the same as the biopsy needle 10 according to the first embodiment except that the substantially straight groove 17 is deleted and the short groove 16 is hollow in the vicinity of the intersection with the side surface of the hollow cylindrical needle portion 11. A through hole 18 that penetrates the side wall of the needle portion 11 is formed, and both ends of the wire 15 are immediately inserted through the short hole 16 through the short groove 16, along the inner wall 11 a of the hollow cylindrical needle portion 11. It is the point extended to the operation part.

このような構成を備える実施形態４の生検針１０Ｅによれば、ワイヤー１５の両端側が中空円筒状の針部１１の側面を実質的に通っておらず、しかも生検針１０Ｅの生体組織への穿刺時には、上述したように内針が挿入されているので、ワイヤー１５の両端側は、ともに内針と中空円筒状の針部１１の内部壁１１ａとの間に挟持された状態となるので、安定した状態に保持される。これにより、穿刺時の挿入抵抗が小さくなって生体組織片の採取効率が向上するとともに、ワイヤー１５がずれてしまうことが抑制され、生体組織片の採取効率が向上する。   According to the biopsy needle 10E of the fourth embodiment having such a configuration, both ends of the wire 15 do not substantially pass through the side surface of the hollow cylindrical needle portion 11, and the biopsy needle 10E punctures a living tissue. Since the inner needle is sometimes inserted as described above, both end sides of the wire 15 are both sandwiched between the inner needle and the inner wall 11a of the hollow cylindrical needle portion 11, and thus stable. Is held in the state. Thereby, the insertion resistance at the time of puncture is reduced, the collection efficiency of the biological tissue piece is improved, and the displacement of the wire 15 is suppressed, and the collection efficiency of the biological tissue piece is improved.

なお、実施形態４の生検針１０Ｅにおいても、図示省略したが、実施形態３の生検針１０Ｄの場合と同様に、中空の針部１１の内部壁１１ａに注射針形状の開口１２の後端側から中空の針部１１の後端側まで溝１７ａを形成し、ワイヤー１５の環状の溝１４Ｃから延在されている両端側をそれぞれ中空の針部１１の内部壁に形成された溝１７ａ内に嵌合・固定して中空の針部１１の後端側まで延在させた構成を採用することもできる。この場合も、中空円筒状の針部１１の開口１２側から見た場合、ワイヤー１５が中空円筒状の針部１１の内部壁１１ａ側に突出することがなくなるので、溝１７ａを形成しない場合よりも操作性が良好となる。   Although not shown in the biopsy needle 10E of the fourth embodiment, the rear end side of the injection needle-shaped opening 12 is formed on the inner wall 11a of the hollow needle portion 11 as in the case of the biopsy needle 10D of the third embodiment. Is formed from the annular groove 14C of the wire 15 into the groove 17a formed on the inner wall of the hollow needle portion 11, respectively. It is also possible to adopt a configuration that is fitted and fixed and extends to the rear end side of the hollow needle portion 11. Also in this case, when viewed from the opening 12 side of the hollow cylindrical needle portion 11, the wire 15 does not protrude toward the inner wall 11a side of the hollow cylindrical needle portion 11, so that the groove 17a is not formed. The operability is also good.

［実施形態５］
実施形態５の生検針１０Ｆを、図７を用いて説明する。なお、図７Ａは実施形態５の生検針の平面図であり、図７Ｂは図７Ａの縦断面図である。また、図７Ａ及び図７Ｂにおいては、図２Ａ及び図２Ｂに示した実施形態１の生検針１０と同じ構成部分には同様の参照符号を付与してその詳細な説明は省略する。 [Embodiment 5]
A biopsy needle 10F according to the fifth embodiment will be described with reference to FIG. 7A is a plan view of the biopsy needle of Embodiment 5, and FIG. 7B is a longitudinal sectional view of FIG. 7A. 7A and 7B, the same components as those of the biopsy needle 10 of Embodiment 1 shown in FIGS. 2A and 2B are denoted by the same reference numerals, and detailed description thereof is omitted.

実施形態５の生検針１０Ｆが実施形態１の生検針１０と構成が相違する点は、実施形態１の生検針１０の直線状の溝１７を設けず、環状の溝１４のワイヤー１５の両端側が合流する点に中空の円筒状の針部１１の内部と連通する貫通孔１９を形成し、ワイヤー１５の両端側を直接貫通孔１９に挿通し、中空円筒状の針部１１の内部壁１１ａに沿って操作部まで延在させた点である。   The difference between the biopsy needle 10F of the fifth embodiment and the biopsy needle 10 of the first embodiment is that the linear groove 17 of the biopsy needle 10 of the first embodiment is not provided, and both end sides of the wire 15 of the annular groove 14 are A through hole 19 that communicates with the inside of the hollow cylindrical needle portion 11 is formed at the joining point, both ends of the wire 15 are directly inserted into the through hole 19, and the inner wall 11 a of the hollow cylindrical needle portion 11 is inserted. It is the point extended to the operation part along.

このような構成を備える実施形態５の生検針１０Ｆによれば、ワイヤー１５の両端側が中空円筒状の針部１１の外側面を実質的に通っておらず、しかも生検針１０Ｆの生体組織への穿刺時には、上述したように内針が挿入されているので、実施形態１の生検針１０の場合と同様にワイヤー１５の両端側は、ともに内針と中空円筒状の針部１１の内部壁１１ａとの間に挟持された状態となるので、安定した状態に保持される。これにより、穿刺時の挿入抵抗が小さくなって生体組織片の採取効率が向上するとともに、ワイヤー１５がずれてしまうことが抑制され、生体組織片の採取効率が向上する。   According to the biopsy needle 10F of Embodiment 5 having such a configuration, both ends of the wire 15 do not substantially pass through the outer surface of the hollow cylindrical needle portion 11, and the biopsy needle 10F is attached to the living tissue. At the time of puncturing, since the inner needle is inserted as described above, the both ends of the wire 15 are both on the inner needle and the inner wall 11a of the hollow cylindrical needle portion 11 as in the case of the biopsy needle 10 of the first embodiment. Is held in a stable state. Thereby, the insertion resistance at the time of puncture is reduced, the collection efficiency of the biological tissue piece is improved, and the displacement of the wire 15 is suppressed, and the collection efficiency of the biological tissue piece is improved.

［実施形態６］
実施形態６の生検針１０Ｇを、図８を用いて説明する。なお、図８Ａは実施形態６の生検針の平面図であり、図８Ｂは図８Ａの縦断面図であり、図８Cは図８ＢのVIIIＣ−VIIIＣ断面図である。また、図８Ａ〜図Ｃにおいては、図７Ａ及び図７Ｂに示した実施形態５の生検針１０Ｆと同じ構成部分には同様の参照符号を付与してその詳細な説明は省略する。 [Embodiment 6]
A biopsy needle 10G according to Embodiment 6 will be described with reference to FIG. 8A is a plan view of the biopsy needle of Embodiment 6, FIG. 8B is a longitudinal sectional view of FIG. 8A, and FIG. 8C is a sectional view of VIIIC-VIIIC of FIG. 8B. 8A to 8C, the same reference numerals are given to the same components as those of the biopsy needle 10F of the fifth embodiment shown in FIGS. 7A and 7B, and detailed description thereof is omitted.

実施形態５の生検針１０Ｆでは、環状の溝１４のワイヤー１５の両端側が合流する点に中空の円筒状の針部１１の内部と連通する貫通孔１９を形成し、ワイヤー１５の両端側を直接貫通孔１９に挿通し、中空円筒状の針部１１の内部壁１１ａに沿って操作部まで延在させたが、実施形態６の生検針１０Ｇでは、中空の針部１１の内部壁１１ａに、貫通孔１９から中空の針部１１の後端側まで直線状の溝１７ａを形成し、ワイヤー１５の環状の溝１４から延在されている両端側をそれぞれ中空の針部１１の内部壁に形成された直線状の溝１７ａ内に嵌合・固定して中空の針部１１の後端側まで延在させたものである。   In the biopsy needle 10F of the fifth embodiment, a through-hole 19 that communicates with the inside of the hollow cylindrical needle portion 11 is formed at a point where both ends of the wire 15 of the annular groove 14 join, and both ends of the wire 15 are directly connected to each other. Although inserted through the through-hole 19 and extended to the operation part along the inner wall 11a of the hollow cylindrical needle part 11, in the biopsy needle 10G of the sixth embodiment, the inner wall 11a of the hollow needle part 11 A straight groove 17 a is formed from the through hole 19 to the rear end side of the hollow needle portion 11, and both end sides extending from the annular groove 14 of the wire 15 are formed on the inner wall of the hollow needle portion 11. It is fitted and fixed in the straight groove 17a, and is extended to the rear end side of the hollow needle portion 11.

このような構成を備える実施形態６の生検針１０Ｆによれば、中空の針部１１の内部壁１１ａに注射針形状の開口１２の後端側１２ｂから中空の針部１１の後端側まで溝１７ａが形成されているので、この溝１７ａ内にワイヤー１５を配置することができ、しかも、中空円筒状の針部１１の開口１２側から見た場合、中空の針部１１の内部壁１１ａ側には一切のワイヤー１５が突出しないようにできるので、実施形態５の生検針１０Ｆが奏する効果に加えて、ワイヤー１５の摩擦が小さくなって操作性がより良好となるという付加的な効果も奏するようになる。   According to the biopsy needle 10F of Embodiment 6 having such a configuration, a groove is formed in the inner wall 11a of the hollow needle portion 11 from the rear end side 12b of the injection needle-shaped opening 12 to the rear end side of the hollow needle portion 11. 17a is formed, the wire 15 can be arranged in the groove 17a, and when viewed from the opening 12 side of the hollow cylindrical needle part 11, the inner wall 11a side of the hollow needle part 11 In addition to the effect of the biopsy needle 10F of the fifth embodiment, there is an additional effect that the friction of the wire 15 is reduced and the operability is improved. It becomes like this.

［実施形態７及び８］
実施形態７及び８の生検針１０Ｈ及び１０Ｉをそれぞれ図９Ａ及び図９Ｂを用いて説明する。なお、図９Ａは実施形態７の生検針の平面図であり、図９Ｂは実施形態８の生検針の平面図である。 [Embodiments 7 and 8]
The biopsy needles 10H and 10I according to the seventh and eighth embodiments will be described with reference to FIGS. 9A and 9B, respectively. 9A is a plan view of the biopsy needle of the seventh embodiment, and FIG. 9B is a plan view of the biopsy needle of the eighth embodiment.

実施形態７の生検針１０Ｈが実施形態１の生検針１０と構成が相違する点は、実施形態１の生検針１０では、環状の溝１４内にワイヤー１５の中間部がループ状に嵌合されており、ワイヤー１５の両端側は互いに合流されて、短溝１６及び直線状の溝１７を経て、中空の針部１１の後端側まで延在されているのに対し、実施形態７の生検針１０Ｈでは、短溝１６の近傍の環状の溝１４内で、ワイヤー１５の一方側の端部が接着材２０によって固定され、ワイヤー１５の他方側のみが短溝１６及び直線状の溝１７を経て、中空の針部１１の後端側まで延在されている点である。   The biopsy needle 10H according to the seventh embodiment is different from the biopsy needle 10 according to the first embodiment in that the intermediate portion of the wire 15 is fitted in a loop shape in the annular groove 14 in the biopsy needle 10 according to the first embodiment. Both ends of the wire 15 are joined together and extend to the rear end side of the hollow needle portion 11 through the short groove 16 and the straight groove 17, whereas In the meter reading 10H, in the annular groove 14 in the vicinity of the short groove 16, one end of the wire 15 is fixed by the adhesive 20, and only the other side of the wire 15 has the short groove 16 and the straight groove 17 formed thereon. This is a point extending to the rear end side of the hollow needle portion 11.

また、実施形態８の生検針１０Ｉが実施形態５の生検針１０Ｆと構成が相違する点は、実施形態５の生検針１０Ｆでは、環状の溝１４内にワイヤー１５の中間部がループ状に嵌合・固定されており、ワイヤー１５の両端側が直接貫通孔１９に挿通されて、中空円筒状の針部１１の内部壁１１ａに沿って操作部まで延在されているのに対し、実施形態８の生検針１０Ｉでは、ワイヤー１５の一方側の端部が貫通孔１９の近傍の環状の溝１４内で接着材２０によって固定され、ワイヤー１５の他方側のみが貫通孔１９及び中空の針部１１の内部を経て、中空の針部１１の後端側まで延在されている点である。   Further, the biopsy needle 10I of the eighth embodiment is different from the biopsy needle 10F of the fifth embodiment in that the intermediate portion of the wire 15 is fitted in a loop shape in the annular groove 14 in the biopsy needle 10F of the fifth embodiment. In the eighth embodiment, both ends of the wire 15 are directly inserted into the through-hole 19 and extend to the operation portion along the inner wall 11a of the hollow cylindrical needle portion 11, whereas the both ends of the wire 15 extend to the operation portion. In the biopsy needle 10I, one end of the wire 15 is fixed by the adhesive 20 in the annular groove 14 in the vicinity of the through hole 19, and only the other side of the wire 15 has the through hole 19 and the hollow needle portion 11. It is a point extended through the inside to the rear end side of the hollow needle part 11.

このような構成の実施形態７の生検針１０Ｈ及び実施形態８の生検針１０Ｉによれば、両者とも１本のワイヤー１５を操作するのみで注射針形状の開口部分に位置する生体組織を切断することができるので、ワイヤー１５の両端側を中空の針部１１の後端側まで延在させた場合よりもワイヤー１５の摩擦が小さくなって操作性が良好となる。   According to the biopsy needle 10H of the seventh embodiment and the biopsy needle 10I of the eighth embodiment having such a configuration, both of them cut the living tissue located at the opening portion of the injection needle shape by operating only one wire 15. Therefore, the friction of the wire 15 becomes smaller and the operability becomes better than when both end sides of the wire 15 are extended to the rear end side of the hollow needle portion 11.

なお、実施形態７の生検針１０Ｈでは、短溝１６及び直線状の溝１７は必ずしも必要な構成ではないが、短溝１６及び直線状の溝１７を設けた方が穿刺時の抵抗が小さくなり、生体組織片の採取効率が良好となる。また、実施形態８の生検針１０Ｉにおいては、実施形態６の生検針１０Ｇの場合と同様に、中空の針部１１の内部壁１１ａに、注射針形状の開口１２の後端側から中空の針部１１の後端側まで直線状の溝１７ａを形成し、環状の溝１４から延在されている１本のワイヤー１５を中空の針部１１の内部壁１１ａに形成された溝１７ａ内に嵌合・固定して中空の針部１１の後端側まで延在させるようにすることもできる。   In the biopsy needle 10H of the seventh embodiment, the short groove 16 and the straight groove 17 are not necessarily required, but the provision of the short groove 16 and the straight groove 17 reduces the resistance during puncture. The collection efficiency of the biological tissue piece becomes good. In the biopsy needle 10I of the eighth embodiment, as in the case of the biopsy needle 10G of the sixth embodiment, a hollow needle is formed on the inner wall 11a of the hollow needle portion 11 from the rear end side of the injection needle-shaped opening 12. A straight groove 17 a is formed up to the rear end side of the portion 11, and one wire 15 extending from the annular groove 14 is fitted into the groove 17 a formed in the inner wall 11 a of the hollow needle portion 11. It can be combined and fixed to extend to the rear end side of the hollow needle portion 11.

［実施形態９］
実施形態９の生検針１０Ｊを、図１０を用いて説明する。なお、図１０Ａは実施形態９の生検針１０Ｊの平面図であり、図１０Ｂは図１０Ａの縦断面図である。また、図１０Ａ及び図１０Ｂにおいては、図５Ａ及び図５Ｂに示した実施形態５の生検針１０Ｆと同じ構成部分には同様の参照符号を付与してその詳細な説明は省略する。 [Embodiment 9]
A biopsy needle 10J according to Embodiment 9 will be described with reference to FIG. 10A is a plan view of the biopsy needle 10J of Embodiment 9, and FIG. 10B is a longitudinal sectional view of FIG. 10A. 10A and 10B, the same components as those of the biopsy needle 10F of the fifth embodiment shown in FIGS. 5A and 5B are denoted by the same reference numerals, and detailed description thereof is omitted.

実施形態５の生検針１０Ｆでは、図７に示したように、注射針形状の開口１２の開口壁１３に形成された環状の溝１４の後端側１２ｂに貫通孔１９を形成し、この貫通孔１９によって環状の溝１４の内部と中空円筒状の針部１１の内部との間を連通させ、ワイヤー１５の両端側を貫通孔１９に挿通し、中空円筒状の針部１１の内部壁１１ａに沿って操作部まで延在させている。それに対し、実施形態９の生検針１０Ｊでは、図１０に示したように、注射針形状の開口１２の開口壁１３に形成された環状の溝１４の先端側に貫通孔１９ａを形成し、この貫通孔１９ａによって環状の溝１４の内部と中空円筒状の針部１１の外部壁とを連通させ、ワイヤー１５の両端側を貫通孔１９ａに挿通させ、中空円筒状の針部１１の外部壁に沿って操作部まで延在させたものである。   In the biopsy needle 10F of the fifth embodiment, as shown in FIG. 7, a through hole 19 is formed in the rear end side 12b of the annular groove 14 formed in the opening wall 13 of the injection needle-shaped opening 12, and this penetration The hole 19 allows the inside of the annular groove 14 and the inside of the hollow cylindrical needle portion 11 to communicate with each other, the both ends of the wire 15 are inserted into the through hole 19, and the inner wall 11 a of the hollow cylindrical needle portion 11 is inserted. Is extended to the operation section. On the other hand, in the biopsy needle 10J of the ninth embodiment, as shown in FIG. 10, a through hole 19a is formed on the distal end side of the annular groove 14 formed in the opening wall 13 of the injection needle-shaped opening 12. The inside of the annular groove 14 and the outer wall of the hollow cylindrical needle portion 11 are communicated with each other by the through hole 19a, and both ends of the wire 15 are inserted into the through hole 19a. It is extended to the operation part along.

このような構成の実施形態９の生検針１０Ｊによれば、ワイヤー１５を、一旦貫通孔１９を通した後は中空円筒状の針部１１の外部壁に沿って配置すればすむので組立が容易となるとともに、実質的に実施形態１の生検針１０と同様の作用効果を奏することができる。すなわち、実施形態９の生検針１０Ｊを生体組織に穿刺して生検針１０の中空円筒状の針部１１内に生体組織が入り込んだ後、ワイヤー１５の両端側を同時に、ないし細かく往復動させながら牽引する操作を行うと、注射針形状の開口１２の環状の溝１４から徐々に離脱して実施形態１の生検針１０の場合とは反対側の先端側に向かってループの径が小さくなり、それに伴って注射針形状の開口１２の環状の溝１４に沿って生体組織の深部が切断されていく。そして、ワイヤー１５のループが貫通孔１９ａに達して閉じた状態となると、注射針形状の開口１２部分に位置している生体組織は実質的に全て切断された状態となる。   According to the biopsy needle 10J of the ninth embodiment having such a configuration, the wire 15 can be arranged along the outer wall of the hollow cylindrical needle portion 11 after passing through the through hole 19 so that assembly is easy. In addition, substantially the same effects as the biopsy needle 10 of the first embodiment can be achieved. That is, after the biopsy needle 10J of Embodiment 9 is punctured into the living tissue and the living tissue enters the hollow cylindrical needle portion 11 of the biopsy needle 10, both ends of the wire 15 are reciprocated simultaneously or finely. When the pulling operation is performed, the diameter of the loop decreases gradually from the annular groove 14 of the injection needle-shaped opening 12 toward the tip side opposite to the case of the biopsy needle 10 of the first embodiment. Along with this, the deep part of the living tissue is cut along the annular groove 14 of the injection needle-shaped opening 12. When the loop of the wire 15 reaches the through hole 19a and is closed, the living tissue located in the injection needle-shaped opening 12 portion is substantially cut.

このような構成を備える実施形態９の生検針１０Ｊにおいても、実施形態１の生検針１０の場合と同様に中空円筒状の針部１１の側面に直線状の溝を形成してもよく、実施形態７の生検針１０Ｈないし実施形態8の生検針１０Ｉの場合と同様に、環状の溝１４内の貫通孔１９ａの近傍でワイヤー１５の一方側の端部を接着剤によって固定し、ワイヤー１５の他方側の端部のみを貫通孔１９ａを通して中空円筒状の針部１１の外部壁に沿って操作部まで延在させてもよい。さらには、実施形態２の生検針１０Ｃの場合と同様に、環状の溝を中空円筒状の針部１１の内部壁に形成してもよい。   Also in the biopsy needle 10J of the ninth embodiment having such a configuration, a linear groove may be formed on the side surface of the hollow cylindrical needle portion 11 as in the case of the biopsy needle 10 of the first embodiment. Similarly to the case of the biopsy needle 10H of the seventh embodiment or the biopsy needle 10I of the eighth embodiment, one end of the wire 15 is fixed with an adhesive in the vicinity of the through hole 19a in the annular groove 14, and the wire 15 Only the other end may be extended through the through hole 19a to the operation portion along the outer wall of the hollow cylindrical needle portion 11. Furthermore, as in the case of the biopsy needle 10C of the second embodiment, an annular groove may be formed on the inner wall of the hollow cylindrical needle portion 11.

［実施形態１０］
実施形態１０の生検針１０Ｋを、図１１を用いて説明する。なお、図１１ａは実施形態１０の生検針の平面図であり、図１１Ｂは図１１ａの縦断面図である。また、図１１ａ及び図１１Ｂにおいては、図５Ａ〜図５Ｃに示した実施形態３の生検針１０Ｄと同じ構成部分には同様の参照符号を付与してその詳細な説明は省略する。 [Embodiment 10]
A biopsy needle 10K according to the tenth embodiment will be described with reference to FIG. In addition, FIG. 11a is a top view of the biopsy needle of Embodiment 10, and FIG. 11B is a longitudinal cross-sectional view of FIG. 11a. 11A and 11B, the same components as those of the biopsy needle 10D according to the third embodiment shown in FIGS. 5A to 5C are denoted by the same reference numerals, and detailed description thereof is omitted.

実施形態１０の生検針１０Ｋが実施形態３の生検針１０Ｄと構成が相違する点は、Ｕ字状の貫通孔１７ｂを、実施形態３の生検針１０Ｄでは環状の溝１４Ｃの注射針形状の開口１２の後端側から僅かに入った箇所に設けているのに対し、実施形態１０の生検針１０Ｋでは逆に環状の溝１４Ｃの注射針形状の開口１２の先端側に設けている点、及び、ワイヤーの両端部を、実施形態３の生検針１０Ｄでは注射針形状の開口１２の後端側から中空の針部１１の内部壁１１ａに設けられた直線状の溝１７ａに嵌合・固定して操作部側まで延在刺せているのに対し、実施形態１０の生検針１０Ｋでは、注射針形状の開口１２の先端側から中空の針部１１の内部壁１１ａに設けられた直線状の溝１７ａに嵌合・固定して操作部側まで延在させている点である。   The biopsy needle 10K according to the tenth embodiment is different from the biopsy needle 10D according to the third embodiment in that the U-shaped through hole 17b is different from the biopsy needle 10D in the third embodiment. In contrast, the biopsy needle 10K of the tenth embodiment is provided on the tip side of the injection needle-shaped opening 12 of the annular groove 14C. In the biopsy needle 10D of the third embodiment, both ends of the wire are fitted and fixed to the linear groove 17a provided on the inner wall 11a of the hollow needle portion 11 from the rear end side of the injection needle-shaped opening 12. In contrast, in the biopsy needle 10K according to the tenth embodiment, the linear groove provided in the inner wall 11a of the hollow needle portion 11 from the distal end side of the injection needle-shaped opening 12 is provided. 17a is fitted and fixed to the operation part side That.

すなわち、操作部側からワイヤー１５の両端部を牽引すると、ワイヤー１５のループは、実施形態３の生検針１０Ｄでは先端側から後端側に向かって小さくなっていくが、実施形態１０の生検針１０Ｋでは後端側から先端側に向かって小さくなっていく。このような構成の実施形態１０の生検針１０Ｋによっても、中空の針部１１の内部に入った生体組織を効率よく切断することができるようになる。   That is, when both ends of the wire 15 are pulled from the operation unit side, the loop of the wire 15 becomes smaller from the front end side to the rear end side in the biopsy needle 10D of the third embodiment, but the biopsy needle of the tenth embodiment. At 10K, it decreases from the rear end side toward the front end side. Also with the biopsy needle 10K of the tenth embodiment having such a configuration, the living tissue that has entered the hollow needle portion 11 can be efficiently cut.

［実施形態１１］
実施形態１１の生検針１０Ｌを、図１２を用いて説明する。なお、図１２Ａは実施形態１１の生検針の平面図であり、図１２Ｂは図１２Ａの縦断面図である。また、図１２Ａ及び図１２Ｂにおいては、図１１ａ及び図１１Ｂに示した実施形態１０の生検針１０Ｋと同じ構成部分には同様の参照符号を付与してその詳細な説明は省略する。 [Embodiment 11]
A biopsy needle 10L according to Embodiment 11 will be described with reference to FIG. 12A is a plan view of the biopsy needle of Embodiment 11, and FIG. 12B is a longitudinal sectional view of FIG. 12A. 12A and 12B, the same components as those of the biopsy needle 10K of the tenth embodiment shown in FIGS. 11a and 11B are denoted by the same reference numerals, and detailed description thereof is omitted.

実施形態１１の生検針１０Ｌが実施形態９の生検針１０Ｋと構成が相違する点は、実施形態９の生検針１０Ｋでは、環状の溝１４内にワイヤー１５の中間部がループ状に嵌合されており、ワイヤー１５の両端側は先端側で互いに合流されて、Ｕ字状の貫通孔１７ｂを通されて、中空の針部１１の内部壁１１ａに形成された直線状の溝１７ａ内を後端側まで延在されているのに対し、実施形態１１の生検針１０Ｌでは、Ｕ字状の貫通孔１７ｂの近傍の環状の溝１４内で、ワイヤー１５の一方側の端部が接着材２０によって固定され、ワイヤー１５の他方側のみがＵ字状の貫通孔１７ｂ及び直線状の溝１７を経て、中空の針部１１の後端側まで延在されている点である。   The difference between the biopsy needle 10L of the eleventh embodiment and the biopsy needle 10K of the ninth embodiment is that the intermediate portion of the wire 15 is fitted in a loop shape in the annular groove 14 in the biopsy needle 10K of the ninth embodiment. Both ends of the wire 15 are joined to each other at the tip side, passed through a U-shaped through hole 17b, and passed through a linear groove 17a formed in the inner wall 11a of the hollow needle portion 11. In contrast, in the biopsy needle 10L of the eleventh embodiment, one end of the wire 15 is bonded to the adhesive 20 in the annular groove 14 near the U-shaped through hole 17b. This is that only the other side of the wire 15 extends to the rear end side of the hollow needle portion 11 through the U-shaped through hole 17b and the linear groove 17.

このような構成の実施形態１１の生検針１０Ｌによれば、１本のワイヤー１５を操作するのみで中空の針部１１の内部に入った生体組織を効率よく切断することができるようになる。なお、実施形態１１の生検針１０Ｌにおいても、直線状の溝１７を形成しない場合には、図示省略した内針の外部壁に直線状の溝を形成することにより同様の作用効果を奏させることができるようになる。   According to the biopsy needle 10L of the eleventh embodiment having such a configuration, it is possible to efficiently cut the living tissue that has entered the hollow needle portion 11 only by operating one wire 15. In addition, also in the biopsy needle 10L of the eleventh embodiment, when the linear groove 17 is not formed, a similar effect can be obtained by forming a linear groove on the outer wall of the inner needle (not shown). Will be able to.

［実施形態１２］
実施形態１２の生検針１０Ｍを、図１３を用いて説明する。なお、図１３Ａは実施形態１２の生検針の平面図であり、図１３Ｂは図１３Ａの縦断面図である。また、図１３Ａ及び図１３Ｂにおいては、図１１ａ及び図１１Ｂに示した実施形態１０の生検針１０Ｋと同じ構成部分には同様の参照符号を付与してその詳細な説明は省略する [Embodiment 12]
A biopsy needle 10M of Embodiment 12 will be described with reference to FIG. 13A is a plan view of the biopsy needle of the twelfth embodiment, and FIG. 13B is a longitudinal sectional view of FIG. 13A. 13A and 13B, the same components as those of the biopsy needle 10K of the tenth embodiment shown in FIGS. 11a and 11B are denoted by the same reference numerals, and detailed description thereof is omitted.

実施形態１０の生検針１０Ｋでは、環状の溝１４Ｃが注射針形状の開口１２の先端側１２ａから僅かに内部に入った箇所から注射針形状の開口１２の後端側１２ｂから僅かに入った箇所まで設けられており、注射針形状の開口１２の先端側１２ａから僅かに入った箇所にＵ字状の貫通孔１７ｂが設けられている。また、中空の針部１１の内部壁１１ａに、Ｕ字状の貫通孔１７ｂに連なり、中空の針部１１の後端側まで延在する直線状の溝１７ａが形成されている。   In the biopsy needle 10K of the tenth embodiment, the annular groove 14C is slightly entered from the rear end side 12b of the injection needle-shaped opening 12 from the position where the annular groove 14C is slightly entered from the distal end side 12a of the injection needle-shaped opening 12. A U-shaped through hole 17b is provided at a position slightly inserted from the distal end side 12a of the injection needle-shaped opening 12. Further, a linear groove 17 a is formed in the inner wall 11 a of the hollow needle portion 11 so as to continue to the U-shaped through hole 17 b and extend to the rear end side of the hollow needle portion 11.

それに対し、実施形態１２の生検針１０Ｍは、注射針形状の開口１２の開口壁１３の内周側に環状の溝１４が形成され、環状の溝１４の先端側にＵ字状の貫通孔１７ｂが形成され、環状の溝１４内にワイヤー１５の中間部がループ状に嵌合されており、ワイヤー１５の両端側は互いに合流されて、Ｕ字状の貫通孔１７ｂを通されて、中空円筒状の針部１１の内部壁１１ａに沿って操作部まで延在されて、操作部より外部に取り出されている。なお、実施形態１２の生検針１０Ｍでは、中空の針部１１の内部壁１１ａに直線状の溝は形成されていない。   On the other hand, in the biopsy needle 10M of the twelfth embodiment, an annular groove 14 is formed on the inner peripheral side of the opening wall 13 of the injection needle-shaped opening 12, and a U-shaped through hole 17b is formed on the distal end side of the annular groove 14. The middle portion of the wire 15 is fitted in a loop shape in the annular groove 14, and both ends of the wire 15 are joined together and passed through a U-shaped through hole 17b to form a hollow cylinder. The needle portion 11 extends along the inner wall 11a of the needle portion 11 to the operation portion, and is taken out from the operation portion. In the biopsy needle 10M of the twelfth embodiment, no linear groove is formed in the inner wall 11a of the hollow needle portion 11.

このような構成の実施形態１２の生検針１０Ｍによれば、中空の針部１１の内部壁１１ａに直線状の溝が形成されていないことにより、ワイヤー１５の操作時の摩擦が大きくなる点があるとしても、その他の点においては実質的に実施形態１０の生検針１０Ｋと同様の作用効果を奏する。なお、ワイヤー１５の操作時の摩擦が大きくなる点は、外周面に直線状の溝を形成した内針を用いることにより克服することができる。   According to the biopsy needle 10M of the twelfth embodiment having such a configuration, since the linear groove is not formed in the inner wall 11a of the hollow needle portion 11, the friction during operation of the wire 15 is increased. Even if it exists, there exists an effect similar to the biopsy needle 10K of Embodiment 10 in another point substantially. In addition, the point that the friction at the time of operation of the wire 15 becomes large can be overcome by using an inner needle in which a linear groove is formed on the outer peripheral surface.

［実施形態１３］
実施形態１３の生検針１０Ｎを、図１４を用いて説明する。なお、図１４Ａは実施形態１３の生検針の平面図であり、図１４Ｂは図１４Ａの縦断面図である。また、図１４Ａ及び図１４Ｂにおいては、図１３Ａ及び図１３Ｂに示した実施形態１２の生検針１０Ｍと同じ構成部分には同様の参照符号を付与してその詳細な説明は省略する [Embodiment 13]
A biopsy needle 10N of the thirteenth embodiment will be described with reference to FIG. 14A is a plan view of the biopsy needle of the thirteenth embodiment, and FIG. 14B is a longitudinal sectional view of FIG. 14A. 14A and 14B, the same components as those of the biopsy needle 10M of the twelfth embodiment shown in FIGS. 13A and 13B are denoted by the same reference numerals, and detailed description thereof is omitted.

実施形態１３の生検針１０Ｎが実施形態１２の生検針１０Ｍと構成が相違する点は、実施形態１２の生検針１０Ｍでは、環状の溝１４内にワイヤー１５の中間部がループ状に嵌合されており、ワイヤー１５の両端側は先端側で互いに合流されて、Ｕ字状の貫通孔１７ｂを通されて、中空の針部１１の内部壁１１ａに沿って中空の針部１１の後端側まで延在されているのに対し、実施形態１３の生検針１０Ｎでは、Ｕ字状の貫通孔１７ｂの近傍の環状の溝１４内で、ワイヤー１５の一方側の端部が接着材２０によって固定され、ワイヤー１５の他方側のみがＵ字状の貫通孔１７ｂを経て、中空の針部１１の後端側まで延在されている点である。   The biopsy needle 10N of the thirteenth embodiment is different from the biopsy needle 10M of the twelfth embodiment in that the intermediate portion of the wire 15 is fitted in a loop shape in the annular groove 14 in the biopsy needle 10M of the twelfth embodiment. Both end sides of the wire 15 are joined together at the tip side, passed through a U-shaped through hole 17b, and along the inner wall 11a of the hollow needle portion 11, the rear end side of the hollow needle portion 11 In contrast, in the biopsy needle 10N of the thirteenth embodiment, one end of the wire 15 is fixed by the adhesive 20 in the annular groove 14 in the vicinity of the U-shaped through hole 17b. Only the other side of the wire 15 is extended to the rear end side of the hollow needle portion 11 through the U-shaped through hole 17b.

このような構成の実施形態１３の生検針１０Ｎによれば、１本のワイヤー１５を操作するのみで中空の針部１１の内部に入った生体組織を効率よく切断することができるようになる。なお、実施形態１３の生検針１０Ｎにおいても、直線状の溝１７を形成しない場合には、図示省略した内針の外部壁に直線状の溝を形成することにより同様の作用効果を奏させることができるようになる。   According to the biopsy needle 10N of the thirteenth embodiment having such a configuration, it is possible to efficiently cut the living tissue that has entered the hollow needle portion 11 only by operating one wire 15. In the biopsy needle 10N of the thirteenth embodiment, when the linear groove 17 is not formed, the same effect can be obtained by forming the linear groove on the outer wall of the inner needle (not shown). Will be able to.

１…超音波内視鏡装置 ２…超音波プローブ
３…鉗子口 ４…シース
５…生検針偏角手段 ６…胃
６ａ…粘膜層 ６ｂ…粘膜下層
６ｃ…粘膜下腫瘍組織 ７…膵臓
８…膵臓腫瘍 ９…十二指腸
９ａ…粘膜層 ９ｂ…粘膜下層
９ｃ…筋層 １０、１０Ａ〜１０Ｎ…生検針
１１…中空円筒状の針部 １１ａ…（中空円筒状の針部の）内部壁
１２…注射針形状の開口 １２ａ…開口壁１３の先端側
１２ｂ…開口壁１３の後端側 １３…開口壁
１４、１４Ｃ…環状の溝 １４ａ…（環状の溝の）最先端部
１５…ワイヤー １６、１６ａ…短溝
１７、１７ａ…直線状の溝 １７ｂ…Ｕ字状ないしＪ字状の貫通孔
１８、１９、１９ａ…貫通孔 ２０…接着剤 DESCRIPTION OF SYMBOLS 1 ... Ultrasound endoscope apparatus 2 ... Ultrasound probe 3 ... Forceps mouth 4 ... Sheath 5 ... Biopsy needle deflection means 6 ... Stomach 6a ... Mucosal layer 6b ... Submucosal layer 6c ... Submucosal tumor tissue 7 ... Pancreas 8 ... Pancreas Tumor 9 ... Duodenum 9a ... Mucosal layer 9b ... Submucosal layer 9c ... Muscle layer 10, 10A-10N ... Biopsy needle 11 ... Hollow cylindrical needle part 11a ... Inner wall (of hollow cylindrical needle part) 12 ... Injection needle shape Of the opening wall 13 12b ... the rear end side of the opening wall 13 13 ... the opening wall 14, 14C ... the annular groove 14a ... (the annular groove) the most advanced part 15 ... the wire 16, 16a ... the short groove 17, 17a ... Linear groove 17b ... U-shaped or J-shaped through hole 18, 19, 19a ... Through hole 20 ... Adhesive

Claims (16)

先端に注射針形状の開口を有する中空の針部と、
前記中空の針部の先端側に設けられた前記注射針形状の開口部分に位置する生体組織を切断するためのワイヤーからなる切断手段と、
を備えた、生体組織内に穿刺して前記中空の針部の内部に生体組織の一部を取り込んで採取するための生検針であって、
前記注射針形状の開口の開口壁の表面又は前記中空の針部の内部壁には環状の溝が形成されており、
前記ワイヤーは、中間部が前記環状の溝内に取り外し可能に嵌合・固定され、両端側がともに前記注射針形状の開口の開口壁の後端側から前記中空の針部の内部又は外部を通されて前記中空の針部の後端側まで延在され、前記中空の針部の後端側から操作可能に設けられていることを特徴とする、生検針。 A hollow needle portion having an injection needle-shaped opening at the tip;
A cutting means comprising a wire for cutting a living tissue located in the opening part of the injection needle shape provided on the distal end side of the hollow needle part;
A biopsy needle for puncturing into a living tissue and taking and collecting a part of the living tissue inside the hollow needle part,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle part,
The wire is detachably fitted and fixed in the annular groove in the middle portion, and both ends pass through the inside or outside of the hollow needle portion from the rear end side of the opening wall of the injection needle shape opening. The biopsy needle is extended to the rear end side of the hollow needle portion and is operable from the rear end side of the hollow needle portion. 先端に注射針形状の開口を有する中空の針部と、
前記中空の針部の先端側に設けられた前記注射針形状の開口部分に位置する生体組織を切断するためのワイヤーからなる切断手段と、
を備えた、生体組織内に穿刺して前記中空の針部の内部に生体組織の一部を取り込んで採取するための生検針であって、
前記注射針形状の開口の開口壁の表面又は前記中空の針部の内部壁には環状の溝が形成されており、
前記ワイヤーは、中間部が前記環状の溝内に取り外し可能に嵌合・固定され、一方の端部が前記注射針形状の開口の開口壁の後端側近傍で前記環状の溝内に固着され、他方の端部が前記注射針形状の開口の開口壁の後端側から前記中空の針部の内部又は外部を通されて前記中空の針部の後端側まで延在され、前記中空の針部の後端側から操作可能に設けられていることを特徴とする、生検針。 A hollow needle portion having an injection needle-shaped opening at the tip;
A cutting means comprising a wire for cutting a living tissue located in the opening part of the injection needle shape provided on the distal end side of the hollow needle part;
A biopsy needle for puncturing into a living tissue and taking and collecting a part of the living tissue inside the hollow needle part,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle part,
The intermediate portion of the wire is detachably fitted and fixed in the annular groove, and one end is fixed in the annular groove in the vicinity of the rear end side of the opening wall of the injection needle-shaped opening. The other end is extended from the rear end side of the opening wall of the injection needle-shaped opening to the rear end side of the hollow needle portion through the inside or the outside of the hollow needle portion, A biopsy needle, which is provided so as to be operable from the rear end side of the needle portion. 前記ワイヤーは、前記注射針形状の開口の開口壁の表面又は前記中空の針部の内部壁と実質的に同一面を形成するように、前記環状の溝内に嵌合・固定されていることを特徴とする、請求項１又は２に記載の生検針。   The wire is fitted and fixed in the annular groove so as to form substantially the same surface as the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle portion. The biopsy needle according to claim 1, wherein: 前記ワイヤーは、前記環状の溝内に易剥離性接着剤により固定されていることを特徴とする、請求項１〜３のいずれかに記載の生検針。   The biopsy needle according to any one of claims 1 to 3, wherein the wire is fixed in the annular groove with an easily peelable adhesive. 前記注射針形状の開口の開口壁の後端側には、前記環状の溝と前記中空の針部の内部壁又は外部壁との間に直線状の溝が形成されており、前記ワイヤーは前記直線状の溝内にも前記注射針形状の開口の開口壁と実質的に同一面を形成するように嵌合・固定されていることを特徴とする、請求項１〜４のいずれかに記載の生検針。   On the rear end side of the opening wall of the injection needle-shaped opening, a linear groove is formed between the annular groove and the inner wall or the outer wall of the hollow needle portion, and the wire is 5. The linear groove is fitted and fixed so as to form substantially the same plane as the opening wall of the injection needle-shaped opening. Biopsy needle. 前記中空の針部の外部壁には、前記注射針形状の開口の後端側から前記中空の針部の後端側まで直線状の溝が形成されており、
前記ワイヤーは前記中空の針部の外部壁に形成された直線状の溝内に嵌合・固定されて前記中空の針部の後端側まで延在されていることを特徴とする、請求項１〜４のいずれかに記載の生検針。 On the outer wall of the hollow needle part, a linear groove is formed from the rear end side of the injection needle-shaped opening to the rear end side of the hollow needle part,
The wire is fitted and fixed in a linear groove formed on an outer wall of the hollow needle portion, and extends to a rear end side of the hollow needle portion. The biopsy needle in any one of 1-4. 前記中空の針部の外部壁には、前記注射針形状の開口の後端側の近傍に、前記中空の針部の内外を貫通する貫通孔が少なくとも一つ設けられており、
前記ワイヤーは前記貫通孔及び前記中空の針部の内部を経て前記中空の針部の後端側まで延在されていることを特徴とする、請求項１〜６のいずれかに記載の生検針。 In the outer wall of the hollow needle part, at least one through-hole penetrating the inside and outside of the hollow needle part is provided in the vicinity of the rear end side of the injection needle-shaped opening,
The biopsy needle according to any one of claims 1 to 6, wherein the wire extends to the rear end side of the hollow needle portion through the inside of the through hole and the hollow needle portion. . 前記注射針形状の開口の後端側の前記環状の溝には前記中空の針部の内部との間に貫通孔が設けられており、
前記ワイヤーは、前記貫通孔及び前記中空の針部の内部を経て、前記中空の針部の後端側まで延在されていることを特徴とする、請求項１〜４のいずれかに記載の生検針。 A through hole is provided between the annular groove on the rear end side of the injection needle-shaped opening and the inside of the hollow needle part,
The said wire is extended to the rear-end side of the said hollow needle part through the inside of the said through-hole and the said hollow needle part, The Claim 1 characterized by the above-mentioned. Biopsy needle. 前記中空の針部の内部壁には、前記注射針形状の開口の後端側から前記中空の針部の後端側まで直線状の溝が形成されており、
前記ワイヤーの前記中空の針部の内部を通る部分は前記中空の針部の内部壁に形成された直線状の溝内に嵌合・固定されて前記中空の針部の後端側まで延在されていることを特徴とする、請求項７又は８に記載の生検針。 A linear groove is formed in the inner wall of the hollow needle portion from the rear end side of the injection needle-shaped opening to the rear end side of the hollow needle portion,
A portion of the wire passing through the hollow needle portion is fitted and fixed in a linear groove formed in the inner wall of the hollow needle portion and extends to the rear end side of the hollow needle portion. The biopsy needle according to claim 7 or 8, wherein the biopsy needle is provided. 先端に注射針形状の開口を有する中空の針部と、
前記中空の針部の先端側に設けられた前記注射針形状の開口部分に位置する生体組織を切断するためのワイヤーからなる切断手段と、
を備えた、生体組織内に穿刺して前記中空の針部の内部に生体組織の一部を取り込んで採取するための生検針であって、
前記注射針形状の開口の開口壁の表面には環状の溝が形成されており、
前記環状の溝の先端側には、前記環状の溝の内部と前記中空の針部の外部壁又は内部壁との間を連通する貫通孔が形成され、
前記ワイヤーは、中間部が前記環状の溝内に取り外し可能に嵌合・固定され、両端側がともに前記注射針形状の開口の開口壁の先端側から前記貫通孔を通されて前記中空の針部の内部又は外部を前記中空の針部の後端側まで延在され、前記中空の針部の後端側から操作可能に設けられていることを特徴とする、生検針。 A hollow needle portion having an injection needle-shaped opening at the tip;
A cutting means comprising a wire for cutting a living tissue located in the opening part of the injection needle shape provided on the distal end side of the hollow needle part;
A biopsy needle for puncturing into a living tissue and taking and collecting a part of the living tissue inside the hollow needle part,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening,
A through-hole that communicates between the inside of the annular groove and the outer wall or the inner wall of the hollow needle portion is formed on the tip side of the annular groove,
The wire is detachably fitted and fixed in the annular groove in the intermediate portion, and both ends are passed through the through hole from the distal end side of the opening wall of the injection needle-shaped opening, and the hollow needle portion A biopsy needle that extends inside or outside to the rear end side of the hollow needle portion and is operable from the rear end side of the hollow needle portion. 先端に注射針形状の開口を有する中空の針部と、
前記中空の針部の先端側に設けられた前記注射針形状の開口部分に位置する生体組織を切断するためのワイヤーからなる切断手段と、
を備えた、生体組織内に穿刺して前記中空の針部の内部に生体組織の一部を取り込んで採取するための生検針であって、
前記注射針形状の開口の開口壁の表面には環状の溝が形成されており、
前記環状の溝の先端側には、前記環状の溝の内部と前記中空の針部の外部壁又は内部壁との間を連通する貫通孔が形成され、
前記ワイヤーは、中間部が前記環状の溝内に取り外し可能に嵌合・固定され、一方の端部が前記注射針形状の開口の開口壁の先端側近傍で前記環状の溝内に固着され、他方の端部が前記注射針形状の開口の開口壁の先端側から前記貫通孔を通されて前記中空の針部の内部又は外部を前記中空の針部の後端側まで延在され、前記中空の針部の後端側から操作可能に設けられていることを特徴とする、生検針。 A hollow needle portion having an injection needle-shaped opening at the tip;
A cutting means comprising a wire for cutting a living tissue located in the opening part of the injection needle shape provided on the distal end side of the hollow needle part;
A biopsy needle for puncturing into a living tissue and taking and collecting a part of the living tissue inside the hollow needle part,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening,
A through-hole that communicates between the inside of the annular groove and the outer wall or the inner wall of the hollow needle portion is formed on the tip side of the annular groove,
The intermediate portion of the wire is detachably fitted and fixed in the annular groove, and one end is fixed in the annular groove in the vicinity of the distal end side of the opening wall of the injection needle-shaped opening, The other end is passed through the through-hole from the front end side of the opening wall of the injection needle-shaped opening and extends inside or outside the hollow needle portion to the rear end side of the hollow needle portion, A biopsy needle which is provided so as to be operable from a rear end side of a hollow needle portion. 前記ワイヤーは、前記注射針形状の開口の開口壁の表面又は前記中空の針部の内部壁と実質的に同一面を形成するように、前記環状の溝内に嵌合・固定されていることを特徴とする、請求項１０又は１１に記載の生検針。   The wire is fitted and fixed in the annular groove so as to form substantially the same surface as the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle portion. The biopsy needle according to claim 10 or 11, characterized in that: 前記ワイヤーは、前記環状の溝内に易剥離性接着剤により固定されていることを特徴とする、請求項１０〜１２のいずれかに記載の生検針。   The biopsy needle according to any one of claims 10 to 12, wherein the wire is fixed in the annular groove with an easily peelable adhesive. 前記中空の針部の外部壁には、前記貫通孔から前記中空の針部の後端側まで、直線状の溝が形成されており、
前記ワイヤーは、前記直線状の溝内に嵌合・固定されて前記中空の針部の後端側まで延在されていることを特徴とする、請求項１０〜１３のいずれかに記載の生検針。 On the outer wall of the hollow needle part, a linear groove is formed from the through hole to the rear end side of the hollow needle part,
The raw wire according to claim 10, wherein the wire is fitted and fixed in the linear groove and extends to a rear end side of the hollow needle portion. Meter reading. 前記環状の溝の先端側には前記中空の針部の内部壁との間に貫通孔が設けられており、
前記ワイヤーは、前記貫通孔及び前記中空の針部の内部を経て、前記中空の針部の後端側まで延在されていることを特徴とする、請求項１０〜１３のいずれかに記載の生検針。 A through hole is provided between the inner end wall of the hollow needle portion on the tip side of the annular groove,
The said wire is extended to the rear end side of the said hollow needle part through the inside of the said through-hole and the said hollow needle part, The any one of Claims 10-13 characterized by the above-mentioned. Biopsy needle. 前記中空の針部の内部壁には、前記貫通孔から前記中空の針部の後端側まで直線状の溝が形成されており、
前記ワイヤーは前記中空の針部の内部壁に形成された直線状の溝内に嵌合・固定されて前記中空の針部の後端側まで延在されていることを特徴とする、請求項１５に記載の生検針。 On the inner wall of the hollow needle part, a linear groove is formed from the through hole to the rear end side of the hollow needle part,
The wire is fitted and fixed in a linear groove formed in an inner wall of the hollow needle portion and extends to a rear end side of the hollow needle portion. 15. The biopsy needle according to 15.
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Citations (6)

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Publication number Priority date Publication date Assignee Title
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JP2005501593A (en) * 2001-08-28 2005-01-20 レックス メディカル リミテッド パートナーシップ Tissue biopsy device
JP2006518646A (en) * 2003-02-20 2006-08-17 マノア メディカル， インコーポレイテッド Bendable cutting device
JP2008206996A (en) * 2008-04-18 2008-09-11 Olympus Corp Endoscope
WO2014007380A1 (en) * 2012-07-06 2014-01-09 国立大学法人鳥取大学 Biopsy needle and endoscopic apparatus using said biopsy needle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5133360A (en) * 1991-03-07 1992-07-28 Spears Colin P Spears retriever
JP2005501593A (en) * 2001-08-28 2005-01-20 レックス メディカル リミテッド パートナーシップ Tissue biopsy device
JP2004230139A (en) * 2002-12-02 2004-08-19 Olympus Corp Mucosal resection instrument for endoscope
JP2006518646A (en) * 2003-02-20 2006-08-17 マノア メディカル， インコーポレイテッド Bendable cutting device
JP2008206996A (en) * 2008-04-18 2008-09-11 Olympus Corp Endoscope
WO2014007380A1 (en) * 2012-07-06 2014-01-09 国立大学法人鳥取大学 Biopsy needle and endoscopic apparatus using said biopsy needle

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