JP5903875B2 - Endoscopic needle - Google Patents

Endoscopic needle Download PDF

Info

Publication number
JP5903875B2
JP5903875B2 JP2011278547A JP2011278547A JP5903875B2 JP 5903875 B2 JP5903875 B2 JP 5903875B2 JP 2011278547 A JP2011278547 A JP 2011278547A JP 2011278547 A JP2011278547 A JP 2011278547A JP 5903875 B2 JP5903875 B2 JP 5903875B2
Authority
JP
Japan
Prior art keywords
puncture needle
inner cylinder
fixing member
outer diameter
needle fixing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2011278547A
Other languages
Japanese (ja)
Other versions
JP2013128567A (en
Inventor
芳樹 豊田
芳樹 豊田
林　拓也
拓也 林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Bakelite Co Ltd
Original Assignee
Sumitomo Bakelite Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Bakelite Co Ltd filed Critical Sumitomo Bakelite Co Ltd
Priority to JP2011278547A priority Critical patent/JP5903875B2/en
Publication of JP2013128567A publication Critical patent/JP2013128567A/en
Application granted granted Critical
Publication of JP5903875B2 publication Critical patent/JP5903875B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Description

本発明は、内視鏡用注射針に関する。   The present invention relates to an endoscope injection needle.

近年、内視鏡下で食道、胃、大腸等の粘膜を切除する内視鏡的粘膜切除術（ＥＭＲ）および内視鏡的粘膜下層剥離術（ＥＳＤ）が行われている。このような施術では、粘膜を切除する前に、粘膜層と筋層とを剥離する必要があり、この剥離に内視鏡用注射針が用いられている。   In recent years, endoscopic mucosal resection (EMR) and endoscopic submucosal dissection (ESD) for excision of mucous membranes such as the esophagus, stomach, and large intestine have been performed under an endoscope. In such a procedure, it is necessary to peel off the mucosa layer and the muscle layer before excising the mucous membrane, and an endoscope needle is used for the peeling.

内視鏡用注射針は、例えば特許文献１に開示されているように、先端に穿刺針が付設された内筒とその内筒を摺動自在に挿通する外筒及び穿刺針の出し入れを操作するグリップを有する。このような内視鏡用注射針を内視鏡の鉗子孔から挿入して、患部に生理食塩水や薬液等を注入することが通常実施されている。   For example, as disclosed in Patent Document 1, an endoscope injection needle operates an inner cylinder having a puncture needle attached to the tip, an outer cylinder that is slidably inserted through the inner cylinder, and an insertion / removal of the puncture needle. To have a grip. It is a common practice to insert such an endoscope injection needle through a forceps hole of an endoscope and inject physiological saline, a drug solution, or the like into the affected area.

生理食塩水や薬剤等は内筒の基端から先端部に付設された穿刺針まで伝わり、穿刺針の内腔から患部に注入される。このとき、内筒の先端部と穿刺針の接続部分に隙間があると生理食塩水や薬剤等が外部に漏れ出す可能性がある。このような課題に対し、特許文献１では、穿刺針と内筒を取り付ける際、穿刺針の外径が内筒の内径より小さい場合に、クリアランスを埋める部材（以下、穿刺針固定部材）を介して、穿刺針と内筒とを接続する注射針が開示されている。この注射針は、穿刺針と内筒とを取り付ける際、接着剤を穿刺針及び穿刺針固定部材に塗布して内筒に接着することにより、穿刺針と内筒の接続部分の隙間を埋めている。   Saline, medicine, and the like are transmitted from the proximal end of the inner cylinder to the puncture needle attached to the distal end, and are injected into the affected area from the lumen of the puncture needle. At this time, if there is a gap between the distal end portion of the inner cylinder and the connection portion of the puncture needle, there is a possibility that physiological saline, medicine, or the like leaks out. With respect to such a problem, in Patent Document 1, when attaching the puncture needle and the inner cylinder, when the outer diameter of the puncture needle is smaller than the inner diameter of the inner cylinder, a member that fills the clearance (hereinafter referred to as a puncture needle fixing member) is used. An injection needle that connects the puncture needle and the inner cylinder is disclosed. When attaching the puncture needle and the inner cylinder, the injection needle fills the gap between the puncture needle and the inner cylinder by applying an adhesive to the puncture needle and the puncture needle fixing member and bonding the adhesive to the inner cylinder. Yes.

特許第４４９３１２６号公報Japanese Patent No. 4493126

しかし、特許文献１に開示される内視鏡用注射針では、穿刺針及び穿刺針固定部材に接着剤を塗布して内筒と接続する際、接着剤が穿刺針の基端面を超えて流れてしまい、穿刺針の内腔をふさいでしまうという問題点がある。   However, in the endoscope injection needle disclosed in Patent Document 1, when the adhesive is applied to the puncture needle and the puncture needle fixing member and connected to the inner cylinder, the adhesive flows beyond the proximal end surface of the puncture needle. Therefore, there is a problem that the lumen of the puncture needle is blocked.

本発明は、上記の課題に鑑みてなされたものであり、穿刺針と内筒とを穿刺針固定部材を介して接続する場合において、接着剤が穿刺針の内腔をふさぐことを防止すると共に、薬液が穿刺針と穿刺針固定部材の隙間から漏れることのない内視鏡用注射針を提供するものである。   The present invention has been made in view of the above-described problems, and prevents the adhesive from blocking the lumen of the puncture needle when the puncture needle and the inner cylinder are connected via the puncture needle fixing member. The present invention provides an endoscope injection needle in which a drug solution does not leak from the gap between the puncture needle and the puncture needle fixing member.

上記課題は、下記（１）〜（２）に記載の本発明によって解決される。
（１）穿刺針と、前記穿刺針が挿入され、基端側に向かって外径が縮径する部分を有する穿刺針固定部材と、前記穿刺針固定部材が先端部に挿入される内筒と、を備え、
前記外径が縮径する部分は、前記穿刺針固定部材の基端に形成されており、
前記穿刺針固定部材は、前記外径が縮径する部分よりも先端側の部分が前記内筒と接着され、
前記外径が縮径する部分の先端の外径は、前記穿刺針固定部材の先端側の部分の外径よりも大きく形成され、
前記接着は、前記穿刺針固定部材と前記内筒との間隙に接着材を介しており、
前記外径が縮径する部分の先端の外径は、前記内筒の内径と略同一であることを特徴とする内視鏡用注射針。
（２）前記穿刺針固定部材は、先端にフランジ部を有しており、前記フランジ部の外径は前記内筒の内径以上外径以下である（１）に記載の内視鏡用注射針。
The said subject is solved by this invention as described in following (1)-( 2 ).
(1) A puncture needle, a puncture needle fixing member having a portion into which the puncture needle is inserted and whose outer diameter is reduced toward the proximal end side, and an inner cylinder into which the puncture needle fixing member is inserted into a distal end portion , equipped with a,
The portion where the outer diameter is reduced is formed at the proximal end of the puncture needle fixing member,
The puncture needle fixing member is bonded to the inner cylinder at a tip side of a portion where the outer diameter is reduced,
The outer diameter of the tip of the portion where the outer diameter is reduced is formed larger than the outer diameter of the tip side portion of the puncture needle fixing member,
The adhesion is via an adhesive in the gap between the puncture needle fixing member and the inner cylinder,
An endoscope injection needle characterized in that an outer diameter of a tip of a portion where the outer diameter is reduced is substantially the same as an inner diameter of the inner cylinder .
( 2 ) The puncture needle fixing member has a flange portion at a tip, and the outer diameter of the flange portion is not less than the inner diameter of the inner cylinder and not more than the outer diameter. ( 1 ) .

本発明によれば、穿刺針と内筒とを穿刺針固定部材を介して接続する場合において、接着剤が穿刺針の内腔をふさぐことを防止すると共に、薬液が穿刺針と穿刺針固定部材の隙間から漏れることのない内視鏡用注射針を提供することができる。   According to the present invention, when the puncture needle and the inner cylinder are connected via the puncture needle fixing member, the adhesive prevents the lumen of the puncture needle from being blocked, and the drug solution prevents the puncture needle and the puncture needle fixing member. It is possible to provide an endoscope injection needle that does not leak from the gap.

本発明の一実施形態に係る内視鏡用注射針の全体図であり、穿刺針を外筒に収納した状態を示した図である。1 is an overall view of an endoscope injection needle according to an embodiment of the present invention, and shows a state where a puncture needle is housed in an outer cylinder. FIG. 本発明の一実施形態に係る内視鏡用注射針の全体図であり、穿刺針を外筒から突出させた状態を示した図である。1 is an overall view of an endoscope injection needle according to an embodiment of the present invention, and shows a state in which a puncture needle is protruded from an outer cylinder. FIG. 図２の穿刺針近傍の拡大断面図である。It is an expanded sectional view of the puncture needle vicinity of FIG.

以下、本発明の内視鏡用注射針について、図面に示す好適な実施の形態に基づいて詳細に説明する。
図１は、本発明の一実施形態に係る内視鏡用注射針の全体図であり、穿刺針を外筒に収納した状態を示した図であり、図２は、穿刺針を外筒から突出させた状態を示した図である。また、図３は、図２の穿刺針近傍の拡大断面図である。 Hereinafter, an endoscope needle for use in the present invention will be described in detail based on a preferred embodiment shown in the drawings.
FIG. 1 is an overall view of an endoscope injection needle according to an embodiment of the present invention, showing a state in which a puncture needle is housed in an outer cylinder, and FIG. It is the figure which showed the state made to protrude. FIG. 3 is an enlarged cross-sectional view of the vicinity of the puncture needle of FIG.

本実施形態の内視鏡用注射針１は、患部に生理食塩水や薬剤等を注入するための器具である。内視鏡用注射針１は、内視鏡の鉗子孔から挿入され患部に到達される。   The endoscope injection needle 1 according to the present embodiment is an instrument for injecting physiological saline or a drug into an affected area. The endoscope injection needle 1 is inserted from the forceps hole of the endoscope and reaches the affected area.

本実施形態の内視鏡用注射針１は、図１ないし図３に示すように、穿刺針２と、この穿刺針２が先端部に設置された内筒３と、この内筒３が軸線方向に進退自在に挿通される内腔を有する外筒４と、を備えている。   As shown in FIGS. 1 to 3, an endoscope injection needle 1 according to the present embodiment includes a puncture needle 2, an inner cylinder 3 in which the puncture needle 2 is installed at a distal end portion, and the inner cylinder 3 serving as an axis. And an outer cylinder 4 having a lumen that is inserted so as to be movable forward and backward in a direction.

穿刺針２は、患部に穿刺され生理食塩水や薬剤等を注入するための部材である。本実施形態では、穿刺針２は内腔を有する略円筒状をなしており、基端部は内筒３に接続されている。さらに、先端部は粘膜組織や血管内にスムーズに穿刺できるようにするため、針先が角度１０°〜４０°の範囲で斜めにカットされていることが好ましい。   The puncture needle 2 is a member that is punctured in an affected area and injects physiological saline, a medicine, or the like. In the present embodiment, the puncture needle 2 has a substantially cylindrical shape having a lumen, and the proximal end portion is connected to the inner cylinder 3. Furthermore, the tip of the tip is preferably cut obliquely within an angle range of 10 ° to 40 ° so that the tip can be smoothly punctured into mucosal tissue or blood vessels.

穿刺針２の材質は、特に限定されないが、粘膜組織や血管内に穿刺できるようにするためパイプを針状に加工できることが好ましく、かつ針状になった部分が穿刺したときに折れたり、欠けたりしないような剛性が必要なためステンレス等の金属が好ましい。   The material of the puncture needle 2 is not particularly limited, but it is preferable that the pipe can be processed into a needle shape so that it can be punctured into a mucosal tissue or blood vessel, and the needle-shaped portion is broken or chipped. A metal such as stainless steel is preferable because it requires such rigidity that it does not move.

内筒３は、基端から注入された生理食塩水や薬剤等を先端に設置された穿刺針まで伝送する部材である。図１に示すように、本実施形態では内筒３は、長尺な可撓管であり、基端側に内筒グリップ３１を備えている。   The inner cylinder 3 is a member that transmits physiological saline or medicine injected from the proximal end to the puncture needle installed at the distal end. As shown in FIG. 1, in the present embodiment, the inner cylinder 3 is a long flexible tube and includes an inner cylinder grip 31 on the proximal end side.

内筒グリップ３１は、穿刺針２の突出状態を操作するために把持される部材である。穿刺針２を外筒４から突出させる際には、内筒グリップ３１を先端側に移動させる。また、穿刺針２を外筒４内に収納する際には、内筒グリップ３１を基端側に移動させる。   The inner cylinder grip 31 is a member that is gripped to operate the protruding state of the puncture needle 2. When protruding the puncture needle 2 from the outer cylinder 4, the inner cylinder grip 31 is moved to the front end side. Further, when the puncture needle 2 is stored in the outer cylinder 4, the inner cylinder grip 31 is moved to the proximal end side.

さらに、内筒グリップ３１は基端部側にコネクター３２を有している。コネクター３２には注射筒（不図示）が接続され、生理食塩水や薬液等の液体物を注入することができる。   Furthermore, the inner cylinder grip 31 has a connector 32 on the proximal end side. A syringe 32 (not shown) is connected to the connector 32 and can inject liquids such as physiological saline and chemicals.

内筒３の材質については、特に限定はされないが、内筒３が外筒４内でスライドすることを考慮してポリテトラフルオロエチレン（ＰＴＦＥ）、四フッ化エチレン・六フッ化プロピレン（ＦＥＰ）などのフッ素樹脂、ポリエチレン（ＰＥ）やポリプロピレン（ＰＰ）などのポリオレフィン、ナイロン樹脂等が挙げられる。   The material of the inner cylinder 3 is not particularly limited, but considering that the inner cylinder 3 slides in the outer cylinder 4, polytetrafluoroethylene (PTFE), tetrafluoroethylene / hexafluoropropylene (FEP) And fluororesins such as polyethylene, polyolefins such as polyethylene (PE) and polypropylene (PP), and nylon resins.

内筒グリップ３１の材質は、接着等の加工性が良く硬化剤等が接触してもクラック等が発生しない程度の耐薬品性が必要で、特に限定はされないが、例えば硬質ポリ塩化ビニル（ＰＶＣ）等の硬質プラスチック樹脂が好ましい。   The material of the inner cylinder grip 31 is excellent in workability such as adhesion, and has chemical resistance that does not cause cracks even if it comes into contact with a curing agent, and is not particularly limited. For example, hard polyvinyl chloride (PVC) Or the like is preferred.

外筒４は、穿刺針２および内筒３が挿入され、これらを保護する部材である。図１に示すように、本実施形態では外筒４は長尺な可撓管であり、基端側に外筒グリップ４１を備えている。   The outer cylinder 4 is a member that inserts the puncture needle 2 and the inner cylinder 3 and protects them. As shown in FIG. 1, in this embodiment, the outer cylinder 4 is a long flexible tube, and is provided with an outer cylinder grip 41 on the base end side.

外筒グリップ４１は、内視鏡用注射針１を内視鏡の鉗子孔に挿入するなどの操作をする際に把持される部材である。外筒グリップ４１は、内腔を有する略筒状をなしており、内腔には内筒３が挿入されている。さらに、穿刺針２の突出操作においては、内筒グリップ３１を収納することができ、内部で内筒グリップ３１をスライドさせることができる。   The outer cylinder grip 41 is a member that is gripped when performing an operation such as inserting the endoscope injection needle 1 into a forceps hole of the endoscope. The outer cylinder grip 41 has a substantially cylindrical shape having an inner cavity, and the inner cylinder 3 is inserted into the inner cavity. Furthermore, in the protrusion operation of the puncture needle 2, the inner cylinder grip 31 can be accommodated and the inner cylinder grip 31 can be slid inside.

さらに、外筒４は、先端側に先端突き当て部４２を備えていてもよい。先端突き当て部４２は、内筒３の先端部が当接することで、穿刺針２の突出長を規定する。   Further, the outer cylinder 4 may include a tip abutting portion 42 on the tip side. The distal end abutting portion 42 defines the protruding length of the puncture needle 2 when the distal end portion of the inner cylinder 3 comes into contact therewith.

先端突当て部４２は、内筒３の先端部が当接できるものであれば特に限定されないが、熱による先端丸め形状賦型、インサート成形等により形成することができる。   The tip end abutting portion 42 is not particularly limited as long as the tip end portion of the inner cylinder 3 can come into contact therewith, but may be formed by tip rounding shaping by heat, insert molding, or the like.

外筒４の材質については、特に限定はされないが、内筒３が外筒４内でスライドすることを考慮してポリテトラフルオロエチレン（ＰＴＦＥ）、四フッ化エチレン・六フッ化プロピレン（ＦＥＰ）などのフッ素樹脂、ポリエチレン（ＰＥ）やポリプロピレン（ＰＰ）などのポリオレフィン、ナイロン樹脂等などが挙げられる。   The material of the outer cylinder 4 is not particularly limited, but considering that the inner cylinder 3 slides in the outer cylinder 4, polytetrafluoroethylene (PTFE), tetrafluoroethylene / hexafluoropropylene (FEP) Fluorine resins such as, polyolefins such as polyethylene (PE) and polypropylene (PP), nylon resins and the like.

外筒グリップ４１の材質は、接着等の加工性が良く硬化剤等が接触してもクラック等が発生しない程度の耐薬品性が必要で、特に限定はされないが、例えば硬質ポリ塩化ビニル（ＰＶＣ）等の硬質プラスチック樹脂が好ましい。   The material of the outer cylinder grip 41 is not particularly limited because it has good workability such as adhesion and does not generate cracks even when it comes into contact with a curing agent. Or the like is preferred.

ここで本実施形態の内視鏡用注射針１の代表的な寸法例について説明する。本実施形態の内視鏡用注射針１は全長が１２００〜２５００ｍｍ程度である。穿刺針２は、全長が１０〜１５ｍｍであり、針の大きさは２５Ｇ〜２０Ｇ（外径０．５ｍｍ〜０．９ｍｍ）であることが好ましい。内筒３の長さは１２００〜２５００ｍｍ、外径は１．６〜２．６ｍｍ、内径は０．９７〜１．９７ｍｍであることが好ましい。内筒３の外径は特に限定されないが、穿刺針２のゲージサイズより０．４〜１．０ｍｍ程大きなものにすることが好ましい。外筒４の長さは１１９０〜２４９０ｍｍ、外径は２．４〜３．０ｍｍ、内径１．９〜２．５ｍｍであることが好ましい。また、内筒グリップ３１の長さは、４５〜１８０ｍｍ、外筒グリップ４１の長さは、３０〜１５０ｍｍであることが好ましい。内筒グリップ３１、外筒グリップ４１の外径、内径は特に限定されないが、内筒グリップ３１が外筒グリップ４１内でスムーズにスライドできる程度の隙間を有していることが好ましい。さらに、先端突当て部４２の内径はそれぞれのゲージサイズの穿刺針２が通過できるものであれば特に限定されないが、それぞれのゲージサイズより０．４〜１．０ｍｍ大きくすることが好ましい。また、穿刺針２の内筒３の先端からの突出長が３〜５ｍｍであることが好ましく、外筒４からの突出距離は特に限定されないが、２〜７ｍｍが好ましく、３〜５ｍｍが更に好ましい。突出距離を上記範囲にすることで、安全に確実な穿刺が可能となる。   Here, the typical dimension example of the injection needle 1 for endoscopes of this embodiment is demonstrated. The endoscope injection needle 1 of the present embodiment has a total length of about 1200 to 2500 mm. The puncture needle 2 has a total length of 10 to 15 mm, and the size of the needle is preferably 25 G to 20 G (outer diameter 0.5 mm to 0.9 mm). The inner cylinder 3 preferably has a length of 1200 to 2500 mm, an outer diameter of 1.6 to 2.6 mm, and an inner diameter of 0.97 to 1.97 mm. The outer diameter of the inner cylinder 3 is not particularly limited, but is preferably about 0.4 to 1.0 mm larger than the gauge size of the puncture needle 2. The length of the outer cylinder 4 is preferably 1190 to 2490 mm, the outer diameter is 2.4 to 3.0 mm, and the inner diameter is 1.9 to 2.5 mm. The length of the inner cylinder grip 31 is preferably 45 to 180 mm, and the length of the outer cylinder grip 41 is preferably 30 to 150 mm. The outer diameter and inner diameter of the inner cylinder grip 31 and the outer cylinder grip 41 are not particularly limited, but it is preferable that the inner cylinder grip 31 has a gap that allows the inner cylinder grip 31 to slide smoothly in the outer cylinder grip 41. Furthermore, the inner diameter of the tip abutting portion 42 is not particularly limited as long as the puncture needle 2 of each gauge size can pass through, but it is preferably 0.4 to 1.0 mm larger than each gauge size. Moreover, it is preferable that the protrusion length from the front-end | tip of the inner cylinder 3 of the puncture needle 2 is 3-5 mm, Although the protrusion distance from the outer cylinder 4 is not specifically limited, 2-7 mm is preferable and 3-5 mm is still more preferable. . By making the protrusion distance within the above range, it is possible to perform puncture safely and reliably.

図３に示すように、本実施形態の内視鏡用注射針１は、穿刺針２と内筒３の間に、管状の穿刺針固定部材５を備えている。すなわち、穿刺針固定部材５に穿刺針２が固定され、この穿刺針固定部材５が内筒３に挿入されている。穿刺針固定部材５を介して内筒３の先端部に穿刺針を設置することで、穿刺針２が固定される。   As shown in FIG. 3, the endoscope injection needle 1 of this embodiment includes a tubular puncture needle fixing member 5 between the puncture needle 2 and the inner cylinder 3. That is, the puncture needle 2 is fixed to the puncture needle fixing member 5, and the puncture needle fixing member 5 is inserted into the inner cylinder 3. The puncture needle 2 is fixed by installing the puncture needle at the distal end portion of the inner cylinder 3 via the puncture needle fixing member 5.

さらに本実施形態では、穿刺針固定部材５の基端部には、基端側に向かって外径が縮径する部分（以下、縮径部）５１を有している。具体的には穿刺針固定部材５は、先端側が円筒状であり基端側が円錐台形状をなしている。そして円錐台の先端部の外径は円筒の外径よりも大きく形成されている。穿刺針固定部材５をこのような構成とすることで、薬液注入時に穿刺針２と穿刺針固定部材５の間に薬液が浸透して先端部から薬液が漏れることを効果的に防止することができる。   Furthermore, in the present embodiment, the proximal end portion of the puncture needle fixing member 5 has a portion (hereinafter referred to as a reduced diameter portion) 51 whose outer diameter is reduced toward the proximal end side. Specifically, the puncture needle fixing member 5 has a cylindrical shape on the distal end side and a truncated cone shape on the proximal end side. And the outer diameter of the front-end | tip part of a truncated cone is formed larger than the outer diameter of a cylinder. By configuring the puncture needle fixing member 5 with such a configuration, it is possible to effectively prevent the chemical liquid from permeating between the puncture needle 2 and the puncture needle fixing member 5 and leaking the chemical liquid from the distal end portion when the chemical liquid is injected. it can.

すなわち、本実施形態の穿刺針固定部材５は、穿刺針２にインサート成型して形成されるが、このとき穿刺針２と穿刺針固定部材５の間には微細な間隙が存在することがある。本実施形態の内視鏡用注射針１では、内筒３の内径に比較して穿刺針２の内腔径が小さいことから、薬液を供給すると、内筒３の先端部（穿刺針固定部材５の基端部）に供給された薬液が貯留する。これにより内筒３の基端部（穿刺針固定部材５の基端部）の内圧が上昇する。ここで、穿刺針固定部材５の基端部が縮径されていることで、内圧の上昇により供給された薬液が縮径部５１を軸方向に押圧する。こうして穿刺針固定部材５の基端部は穿刺針２の方向にその内径が縮径され、穿刺針２と穿刺針固定部材５の間の間隙を閉塞する。このため穿刺針２と穿刺針固定部材５の隙間からの薬液の漏れを抑制することができる。   In other words, the puncture needle fixing member 5 of the present embodiment is formed by insert molding to the puncture needle 2, and at this time, a fine gap may exist between the puncture needle 2 and the puncture needle fixing member 5. . In the endoscope injection needle 1 of the present embodiment, since the lumen diameter of the puncture needle 2 is smaller than the inner diameter of the inner cylinder 3, when a drug solution is supplied, the distal end portion (puncture needle fixing member) of the inner cylinder 3 is supplied. The chemical solution supplied to the base end 5) is stored. Thereby, the internal pressure of the base end part (base end part of the puncture needle fixing member 5) of the inner cylinder 3 rises. Here, since the proximal end portion of the puncture needle fixing member 5 is reduced in diameter, the chemical solution supplied by the increase in internal pressure presses the reduced diameter portion 51 in the axial direction. In this way, the inner end of the proximal end portion of the puncture needle fixing member 5 is reduced in the direction of the puncture needle 2 to close the gap between the puncture needle 2 and the puncture needle fixing member 5. For this reason, the leakage of the chemical solution from the gap between the puncture needle 2 and the puncture needle fixing member 5 can be suppressed.

穿刺針固定部材５の材質は、接着等の加工性が良く硬化剤等が接触してもクラック等が発生しない程度の耐薬品性が必要で、特に限定されないが、ＡＢＳ樹脂等の硬質プラスチック樹脂が好ましい。   The material of the puncture needle fixing member 5 is not particularly limited as long as the material of the puncture needle fixing member 5 has good workability such as adhesion and does not generate cracks even when it comes into contact with a curing agent. Is preferred.

さらに、穿刺針固定部材５は内筒３の先端部に接着剤６を介して固定されている。すなわち、図３に示すように穿刺針固定部材５と内筒３との間隙は接着剤６の層で埋められている。このようにすることで穿刺針固定部材５および穿刺針２を内筒３に固定することができる。さらに接着剤６は薬液注入時に内筒３と穿刺針固定部材５の隙間から薬液が漏れることを効果的に防止する。   Further, the puncture needle fixing member 5 is fixed to the distal end portion of the inner cylinder 3 via an adhesive 6. That is, as shown in FIG. 3, the gap between the puncture needle fixing member 5 and the inner cylinder 3 is filled with a layer of the adhesive 6. By doing so, the puncture needle fixing member 5 and the puncture needle 2 can be fixed to the inner cylinder 3. Further, the adhesive 6 effectively prevents the chemical liquid from leaking from the gap between the inner cylinder 3 and the puncture needle fixing member 5 when the chemical liquid is injected.

接着剤６の種類は特に限定されないが、エポキシ接着剤、瞬間接着剤等を用いて溶剤接着することができる。   The type of the adhesive 6 is not particularly limited, but it can be solvent-bonded using an epoxy adhesive, an instantaneous adhesive, or the like.

前述のように本実施形態の穿刺針固定部材５は円筒状の先端側部分と円錐台状の基端側部分を有する。そして、基端側部分の先端の外径は先端側部分の外径よりも大きい。すなわち、先端側部分と基端側部分との境界には段差が形成されている。こうすることで、接着剤６が縮径部５１を超えて針元に流れて、針穴をふさぐことを効果的に防止できる。   As described above, the puncture needle fixing member 5 of the present embodiment has a cylindrical tip side portion and a truncated cone-like base end portion. And the outer diameter of the front-end | tip part of a base end side part is larger than the outer diameter of a front end side part. That is, a step is formed at the boundary between the distal end portion and the proximal end portion. By doing so, it is possible to effectively prevent the adhesive 6 from flowing over the reduced diameter portion 51 to the needle base and blocking the needle hole.

図３に示すように、穿刺針固定部材５は、先端にフランジ５２を有している。フランジ５２の外径は内筒３の内径以上、外径以下である。こうすることで、穿刺針２を内筒３に挿入して接続するとき、穿刺針２の挿入がフランジ５２で止まるため、針の挿入長を規定できる。   As shown in FIG. 3, the puncture needle fixing member 5 has a flange 52 at the tip. The outer diameter of the flange 52 is not less than the inner diameter of the inner cylinder 3 and not more than the outer diameter. By doing so, when the puncture needle 2 is inserted and connected to the inner cylinder 3, the insertion of the puncture needle 2 stops at the flange 52, so that the insertion length of the needle can be defined.

以上、本発明を実施形態に基づいて説明した。これらの実施形態はあくまで例示であり、種々の変形例が可能なこと、またそうした変形例も本発明の範囲にあることは当業者に理解されるところである。   The present invention has been described based on the embodiments. It is to be understood by those skilled in the art that these embodiments are merely examples, and that various modifications are possible and that such modifications are within the scope of the present invention.

１ 内視鏡用注射針
２ 穿刺針
３ 内筒
３１ 内筒グリップ
３２ コネクター
４ 外筒
４１ 外筒グリップ
４２ 先端突当て部
５ 穿刺針固定部材
５１ 縮径部
５２ フランジ
６ 接着剤 DESCRIPTION OF SYMBOLS 1 Endoscopic injection needle 2 Puncture needle 3 Inner cylinder 31 Inner cylinder grip 32 Connector 4 Outer cylinder 41 Outer cylinder grip 42 Tip butting part 5 Puncture needle fixing member 51 Reduced diameter part 52 Flange 6 Adhesive

Claims (2)

穿刺針と、
前記穿刺針が挿入され、基端側に向かって外径が縮径する部分を有する穿刺針固定部材と、
前記穿刺針固定部材が先端部に挿入される内筒と、
を備え、
前記外径が縮径する部分は、前記穿刺針固定部材の基端に形成されており、
前記穿刺針固定部材は、前記外径が縮径する部分よりも先端側の部分が前記内筒と接着され、
前記外径が縮径する部分の先端の外径は、前記穿刺針固定部材の先端側の部分の外径よりも大きく形成され、
前記接着は、前記穿刺針固定部材と前記内筒との間隙に接着材を介しており、
前記外径が縮径する部分の先端の外径は、前記内筒の内径と略同一であることを特徴とする内視鏡用注射針。 A puncture needle,
A puncture needle fixing member having a portion into which the puncture needle is inserted and whose outer diameter decreases toward the proximal side;
An inner cylinder into which the puncture needle fixing member is inserted into the distal end portion;
Equipped with a,
The portion where the outer diameter is reduced is formed at the proximal end of the puncture needle fixing member,
The puncture needle fixing member is bonded to the inner cylinder at a tip side of a portion where the outer diameter is reduced,
The outer diameter of the tip of the portion where the outer diameter is reduced is formed larger than the outer diameter of the tip side portion of the puncture needle fixing member,
The adhesion is via an adhesive in the gap between the puncture needle fixing member and the inner cylinder,
An endoscope injection needle characterized in that an outer diameter of a tip of a portion where the outer diameter is reduced is substantially the same as an inner diameter of the inner cylinder . 前記穿刺針固定部材は、先端にフランジ部を有しており、前記フランジ部の外径は前記内筒の内径以上外径以下である請求項１に記載の内視鏡用注射針。 2. The endoscope injection needle according to claim 1 , wherein the puncture needle fixing member has a flange portion at a distal end, and an outer diameter of the flange portion is not less than an inner diameter of the inner cylinder and not more than an outer diameter.
JP2011278547A 2011-12-20 2011-12-20 Endoscopic needle Active JP5903875B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011278547A JP5903875B2 (en) 2011-12-20 2011-12-20 Endoscopic needle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011278547A JP5903875B2 (en) 2011-12-20 2011-12-20 Endoscopic needle

Publications (2)

Publication Number Publication Date
JP2013128567A JP2013128567A (en) 2013-07-04
JP5903875B2 true JP5903875B2 (en) 2016-04-13

Family

ID=48906680

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011278547A Active JP5903875B2 (en) 2011-12-20 2011-12-20 Endoscopic needle

Country Status (1)

Country Link
JP (1) JP5903875B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6402465B2 (en) * 2014-03-28 2018-10-10 住友ベークライト株式会社 Endoscope injection needle and method for manufacturing endoscope injection needle
US20170266391A1 (en) * 2014-09-22 2017-09-21 Kaneka Corporation Injection needle device for endoscope
DE112016006869T5 (en) * 2016-05-17 2019-02-14 Olympus Corporation Injection needle for an endoscope

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4466153B2 (en) * 2004-03-29 2010-05-26 住友ベークライト株式会社 Endoscopic needle
CN102238917B (en) * 2008-12-24 2017-05-24 奥林巴斯株式会社 Treatment instrument

Also Published As

Publication number Publication date
JP2013128567A (en) 2013-07-04

Similar Documents

Publication Publication Date Title
US7736302B2 (en) Cap for endoscope
US20170007296A1 (en) Trocar
WO2015053365A1 (en) High-frequency treatment tool for endoscope
JP2009183516A (en) Treatment tool for esd
KR20170122756A (en) Endoscopic treatment tool
JP5903875B2 (en) Endoscopic needle
WO2016158294A1 (en) Medical leak inspection device
JP2011104158A (en) Injection needle for endoscope
JP2020506014A (en) Snare injection device
JP2006271571A (en) Injection needle for endoscope
TW202042851A (en) Injection tool for endoscope
JP2009172029A (en) Injection needle for endoscope, and inner tube having needle body fixed to its distal end
KR20070048719A (en) Flushing device and catheter set
JP6196110B2 (en) Long member for medical use
JP6029086B2 (en) Catheter with valve
JP5098779B2 (en) Endoscopic needle
US20210220618A1 (en) Catheter assembly
JP7364482B2 (en) balloon catheter
JP4466153B2 (en) Endoscopic needle
JP2018102631A (en) Injection tool for endoscope
JP6311479B2 (en) Endoscope injection needle and method for manufacturing endoscope injection needle
WO2021059943A1 (en) Balloon catheter
US20210196925A1 (en) Catheter assembly
JP6402465B2 (en) Endoscope injection needle and method for manufacturing endoscope injection needle
WO2019189759A1 (en) Hemostatic device and hemostatic kit

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20140515

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20150731

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20150804

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20150831

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20160216

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20160229

R150 Certificate of patent or registration of utility model

Ref document number: 5903875

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150