JPH05261062A - Injection means for endoscope - Google Patents
Injection means for endoscopeInfo
- Publication number
- JPH05261062A JPH05261062A JP4058512A JP5851292A JPH05261062A JP H05261062 A JPH05261062 A JP H05261062A JP 4058512 A JP4058512 A JP 4058512A JP 5851292 A JP5851292 A JP 5851292A JP H05261062 A JPH05261062 A JP H05261062A
- Authority
- JP
- Japan
- Prior art keywords
- endoscope
- tip
- tube
- memory alloy
- shape memory
- 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.)
- Pending
Links
Landscapes
- Endoscopes (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、内視鏡の鉗子チャン
ネル内に挿通して体腔内に注射をするための内視鏡用注
射具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope injector for inserting the forceps channel of an endoscope into a body cavity for injection.
【0002】[0002]
【従来の技術】この種の内視鏡用注射具は、可撓性のあ
る細長い外套管内に進退自在に挿通された送液チューブ
の先端に注射針を取り付け、送液チューブの手元側に取
り付けられた口金に注射器を接続して、注射器から注射
針に薬液等を送り出すことができるようにしている。2. Description of the Related Art An endoscope injection instrument of this type is mounted on the proximal side of the liquid feeding tube by attaching an injection needle to the tip of the liquid feeding tube which is inserted in a flexible elongated outer tube so as to be able to move forward and backward. A syringe is connected to the mouthpiece so that the liquid medicine can be delivered from the syringe to the injection needle.
【0003】[0003]
【発明が解決しようとする課題】このような内視鏡用注
射具の注射針を患部に突き刺す場合には、患部に対して
ある程度直角に近い角度で正面から突き刺さないと、針
先が滑ってうまくいかない場合が多い。When the injection needle of such an endoscope injection tool is pierced into the affected area, the needle tip will slip unless it is pierced from the front at an angle close to a right angle to the affected area. Often does not work.
【0004】そこで、例えば図5に示されるように、密
巻きコイルで形成された外套管91の先端に屈曲し易い
湾曲部92を形成して、手元側から牽引される操作ワイ
ヤ93を湾曲部92部分でコイル外に配置し、この操作
ワイヤ93を手元側から牽引することによって湾曲部9
2を遠隔操作によって屈曲させることができるようにす
ることが考えられる。このようにすれば、患部に対して
正面から穿刺することができる。Therefore, as shown in FIG. 5, for example, a bending portion 92 that is easily bent is formed at the tip of an outer tube 91 formed of a tightly wound coil so that the operation wire 93 pulled from the hand side is bent. The bending portion 9 is arranged outside the coil at the portion 92, and the operating wire 93 is pulled from the hand side.
It is conceivable to allow 2 to be bent by remote control. By doing this, it is possible to puncture the affected area from the front.
【0005】しかし、このように操作ワイヤ93をコイ
ル外に配置すると、図6に示されるように、注射具を内
視鏡200に挿通して使用する際に、操作ワイヤ93の
部分は必ず内視鏡200から突出していなければならな
い。However, when the operation wire 93 is arranged outside the coil in this way, as shown in FIG. 6, when the injection tool is inserted into the endoscope 200 for use, the part of the operation wire 93 is always inside. It must project from the endoscope 200.
【0006】したがって、注射対象の患部100と内視
鏡200先端との間に必ず一定以上の距離Lをあける必
要があり、内視鏡200の先端から近距離の位置にある
患部に対して注射することができない欠点がある。Therefore, it is necessary to always provide a distance L between the affected part 100 to be injected and the tip of the endoscope 200, and the injection is performed to the affected part located at a short distance from the tip of the endoscope 200. There is a drawback that cannot be done.
【0007】また、操作ワイヤを用いると、操作ワイヤ
の固着や切断等による作動不良が発生しがちである。そ
こで本発明は、作動不良が発生せずに先端側の部分を確
実に屈曲させることができ、しかも内視鏡の先端から近
い位置にある患部に対しても、注射具の先端を屈曲させ
て正面から穿刺することができる内視鏡用注射具を提供
することを目的とする。Further, when the operation wire is used, malfunction tends to occur due to sticking or cutting of the operation wire. Therefore, the present invention can surely bend the tip side portion without causing a malfunction, and bends the tip of the injection tool even for the affected area located near the tip of the endoscope. An object of the present invention is to provide an endoscope injection tool that can be punctured from the front.
【0008】[0008]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の内視鏡用注射具は、可撓性のある細長い外
套管内に進退自在に挿通された送液チューブの先端に、
上記外套管の先端から出入り自在に注射針を連通接続し
た内視鏡用注射具において、屈曲した形状を記憶してい
て常温ではほぼ真直であり加熱されることによって記憶
している屈曲形状に変化する形状記憶合金材を、上記外
套管の先端近傍に管軸方向に沿って配置すると共に、上
記形状記憶合金材を遠隔操作によって加熱させるための
加熱手段を設けたことを特徴とする。In order to achieve the above-mentioned object, an endoscope injection tool of the present invention is provided with a distal end of a liquid feeding tube that is inserted into a flexible elongated outer tube so as to be able to advance and retract.
In an endoscope injection device in which an injection needle is connected for communication in and out from the tip of the mantle tube, the bent shape is memorized, is substantially straight at room temperature, and changes to the memorized bent shape when heated. The shape memory alloy material is disposed near the tip of the outer tube along the tube axis direction, and a heating means for remotely heating the shape memory alloy material is provided.
【0009】[0009]
【実施例】図面を参照して実施例を説明する。図2は内
視鏡用注射具を示しており、図中1は、例えば外径が2
mmで長さが1.5m程度の密巻きコイルからなる可撓性
のある細長い外套管である。Embodiments will be described with reference to the drawings. FIG. 2 shows an injection tool for an endoscope. In FIG.
It is a flexible, slender outer tube consisting of a tightly wound coil with a length of 1.5 mm and a length of about 1.5 m.
【0010】外套管1の手元側には、筒状の本体2が外
套管1に対して同軸に連結接続されている。3は、外套
管1が本体2との接続部近傍で折れ曲がらないようにす
るために、外套管1の外側に装着された折れ止めコイル
である。A tubular body 2 is coaxially connected to the outer tube 1 on the proximal side of the outer tube 1. Reference numeral 3 is a bend prevention coil attached to the outside of the outer tube 1 so that the outer tube 1 does not bend near the connection portion with the main body 2.
【0011】外套管1内には、ほぼ全長にわたって、フ
ッ素樹脂チューブ等からなる送液チューブ5が進退自在
に挿通されている。そして、送液チューブ5の先端に
は、外套管1の先端から出入り自在に、注射針6が連通
固着されている。A liquid feeding tube 5 made of a fluororesin tube or the like is inserted into the outer tube 1 so as to extend and retract over substantially the entire length. An injection needle 6 is fixedly connected to the distal end of the liquid supply tube 5 so as to be able to move in and out from the distal end of the outer tube 1.
【0012】送液チューブ5の手元側には、注射器接続
口金8が、本体2の手元側から突出して進退自在に連通
固着されている。また、送液チューブ5が腰折れせずに
軸方向に進退できるように、注射器接続口金8には、送
液チューブ5の手元側端部近傍を囲む筒状の操作管9が
固着されている。A syringe connection mouthpiece 8 is fixed to the proximal side of the liquid feeding tube 5 so as to project from the proximal side of the main body 2 so as to be movable back and forth. Further, a cylindrical operation tube 9 surrounding the vicinity of the proximal end of the liquid supply tube 5 is fixed to the syringe connection mouthpiece 8 so that the liquid supply tube 5 can be moved back and forth in the axial direction without bending.
【0013】操作管9は本体2内に進退自在に嵌合して
いる。したがって、操作管9を指先で摘んで軸方向に進
退操作させることができ、操作管9を本体2内に押し込
めば、先端から注射針6が突出し、図2に示されるよう
に、操作管9を本体2から引き出せば、注射針6が外套
管1の先端内に引き込まれる。The operation tube 9 is fitted in the main body 2 so as to be movable back and forth. Therefore, the operating tube 9 can be moved forward and backward in the axial direction by pinching it with a fingertip, and when the operating tube 9 is pushed into the main body 2, the injection needle 6 projects from the tip, and as shown in FIG. When the needle is pulled out from the main body 2, the injection needle 6 is pulled into the tip of the outer tube 1.
【0014】図3は外套管1の先端部分を示している。
外套管1の先端側の例えば長さ1ないし3cmの部分に
は、腰が弱くて屈曲の容易な先端コイル1aが用いられ
て、接続管4によって外套管1の手元側コイルと接続さ
れている。1bは、先端コイル1aの先端に取り付けら
れた先端チップである。FIG. 3 shows the tip portion of the outer tube 1.
A tip coil 1a having a weak waist and easy bending is used at the tip side of the jacket tube 1 having a length of 1 to 3 cm, for example, and is connected to the proximal coil of the jacket tube 1 by a connecting tube 4. .. 1b is a tip chip attached to the tip of the tip coil 1a.
【0015】そして、先端コイル1a内には、常温では
ほぼ真直な細長い形状の形状記憶合金材10が、管軸方
向に沿って、送液チューブ5及び注射針6と干渉しない
ように配置されている。In the tip coil 1a, a shape memory alloy material 10 having an elongated straight shape at room temperature is arranged along the tube axis so as not to interfere with the liquid feeding tube 5 and the injection needle 6. There is.
【0016】この形状記憶合金材10は、ほぼ直角に屈
曲した形状を記憶していて、加熱されることによって記
憶している形状に変化し、常温になれば再び真直の形状
に戻る。11は、形状記憶合金材10に加熱用の電流を
与えるためのリード線であり、接続管4を介して形状記
憶合金材10に接続されている。このリード線11は、
図2に示されるように、本体2の途中で外方に別れて、
加熱用電源12に接続されている。The shape memory alloy material 10 remembers a shape bent at a substantially right angle, changes to the memorized shape by being heated, and returns to a straight shape again at room temperature. Reference numeral 11 is a lead wire for applying a heating current to the shape memory alloy material 10, and is connected to the shape memory alloy material 10 via the connection pipe 4. This lead wire 11
As shown in FIG. 2, in the middle of the main body 2, it splits outward,
It is connected to the heating power supply 12.
【0017】このように構成された実施例の内視鏡用注
射具によれば、加熱用電源12をオンすると、形状記憶
合金材10に電流が流れて加熱される。その結果、図1
に示されるように、形状記憶合金材10が、記憶してい
る屈曲した形状に変形し、先端コイル1aの後半部が滑
らかにほぼ直角に屈曲する。先端コイル1aの前半部
は、注射針6が進退するので、屈曲させない方がよい。According to the endoscope injection tool of the embodiment thus constructed, when the heating power source 12 is turned on, an electric current flows through the shape memory alloy material 10 to heat it. As a result,
As shown in FIG. 3, the shape memory alloy material 10 is deformed into a memorized bent shape, and the rear half of the tip coil 1a is smoothly bent at a substantially right angle. Since the injection needle 6 advances and retreats, it is better not to bend the front half of the tip coil 1a.
【0018】図4は、この実施例の内視鏡用注射具を内
視鏡200に挿通して、注射針6で患部100を穿刺し
ている状態を示しており、操作ワイヤ等が無いので、先
端コイル1aの屈曲部分を内視鏡200の先端ぎりぎり
まで近づけることができる。FIG. 4 shows a state in which the endoscope injection tool of this embodiment is inserted into the endoscope 200 and the affected part 100 is punctured by the injection needle 6, and there is no operation wire or the like. The bent portion of the tip coil 1 a can be brought close to the tip of the endoscope 200.
【0019】したがって、外套管1の先端部分を所定の
角度屈曲させて、内視鏡200の先端から近い位置にあ
る患部100に対しても正対して容易に穿刺することが
できる。Therefore, the distal end portion of the outer tube 1 can be bent at a predetermined angle to easily puncture the affected area 100 near the distal end of the endoscope 200 by directly facing it.
【0020】そして最後に、注射器接続口金8に接続し
た注射器(図示せず)から薬液を注入すれば、目標部位
に対する薬液の注射が終了し、注射針6を引っ込めた
後、加熱用電源12をオフにすれば、形状記憶合金材1
0が常温に下がって真直になり、先端コイル1a部分が
真直の形状に戻る。Finally, by injecting the drug solution from a syringe (not shown) connected to the syringe connection mouthpiece 8, the injection of the drug solution to the target site is completed, the injection needle 6 is retracted, and the heating power source 12 is turned on. If turned off, shape memory alloy material 1
The temperature of 0 drops to normal temperature and becomes straight, and the tip coil 1a portion returns to a straight shape.
【0021】[0021]
【発明の効果】本発明の内視鏡用注射具によれば、外套
管の先端近傍に配置した形状記憶合金材を加熱すること
によってその部分を屈曲させることができ、操作ワイヤ
等を用いる必要がないので、作動不良が発生せずに先端
側の部分を確実に屈曲させることができ、屈曲部分を内
視鏡の先端に近づけることができるので、内視鏡の先端
から近い位置にある患部に対しても、先端を屈曲させて
正面から容易に穿刺することができる優れた効果を有す
る。According to the endoscope injection tool of the present invention, the shape memory alloy material disposed near the distal end of the mantle tube can be bent by heating, and it is necessary to use an operation wire or the like. Since there is no malfunction, the tip side part can be bent securely without causing malfunction, and since the bent part can be brought close to the tip of the endoscope, the affected part located near the tip of the endoscope Even with respect to the above, there is an excellent effect that the tip can be bent to easily puncture from the front.
【図1】本発明の実施例の先端部分の屈曲状態の側面断
面図である。FIG. 1 is a side sectional view showing a bent state of a tip portion according to an embodiment of the present invention.
【図2】本発明の実施例の側面図である。FIG. 2 is a side view of an embodiment of the present invention.
【図3】本発明の実施例の先端部分の側面断面図であ
る。FIG. 3 is a side sectional view of the tip portion of the embodiment of the present invention.
【図4】本発明の実施例の使用状態の側面図である。FIG. 4 is a side view of the use example of the present invention.
【図5】従来例の屈曲状態の側面図である。FIG. 5 is a side view of a conventional example in a bent state.
【図6】従来例の使用状態の側面図である。FIG. 6 is a side view of a conventional example in use.
1 外套管 1a 先端コイル 5 送液チューブ 6 注射針 10 形状記憶合金材 12 加熱用電源 1 Mantle Tube 1a Tip Coil 5 Liquid Transfer Tube 6 Injection Needle 10 Shape Memory Alloy Material 12 Power Supply for Heating
Claims (1)
挿通された送液チューブの先端に、上記外套管の先端か
ら出入り自在に注射針を連通接続した内視鏡用注射具に
おいて、 屈曲した形状を記憶していて常温ではほぼ真直であり加
熱されることによって記憶している屈曲形状に変化する
形状記憶合金材を、上記外套管の先端近傍に管軸方向に
沿って配置すると共に、上記形状記憶合金材を遠隔操作
によって加熱させるための加熱手段を設けたことを特徴
とする内視鏡用注射具。1. An endoscope injection tool in which an injection needle is communicatively connected to a distal end of a liquid feeding tube inserted in a flexible elongated outer sheath tube so as to be able to advance and retreat, A shape memory alloy material that remembers the bent shape and is almost straight at room temperature and changes to the bent shape that is remembered by being heated is arranged near the tip of the outer tube along the tube axis direction. An endoscope injection tool comprising heating means for heating the shape memory alloy material by remote control.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4058512A JPH05261062A (en) | 1992-03-17 | 1992-03-17 | Injection means for endoscope |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4058512A JPH05261062A (en) | 1992-03-17 | 1992-03-17 | Injection means for endoscope |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05261062A true JPH05261062A (en) | 1993-10-12 |
Family
ID=13086483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4058512A Pending JPH05261062A (en) | 1992-03-17 | 1992-03-17 | Injection means for endoscope |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05261062A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6126633A (en) * | 1997-07-11 | 2000-10-03 | Olympus Optical Co., Ltd. | Surgical instrument |
JP2003205036A (en) * | 2002-01-11 | 2003-07-22 | Univ Nihon | Intubation liquid medicine and extra fine flexible injection needle for cellular injection |
WO2011162100A1 (en) * | 2010-06-23 | 2011-12-29 | テルモ株式会社 | Medical device |
-
1992
- 1992-03-17 JP JP4058512A patent/JPH05261062A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6126633A (en) * | 1997-07-11 | 2000-10-03 | Olympus Optical Co., Ltd. | Surgical instrument |
JP2003205036A (en) * | 2002-01-11 | 2003-07-22 | Univ Nihon | Intubation liquid medicine and extra fine flexible injection needle for cellular injection |
WO2011162100A1 (en) * | 2010-06-23 | 2011-12-29 | テルモ株式会社 | Medical device |
US9352085B2 (en) | 2010-06-23 | 2016-05-31 | Terumo Kabushiki Kaisha | Medical device |
JP5980114B2 (en) * | 2010-06-23 | 2016-08-31 | テルモ株式会社 | Medical device |
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