JP2007107944A - Needle removal detection device - Google Patents

Needle removal detection device Download PDF

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JP2007107944A
JP2007107944A JP2005297261A JP2005297261A JP2007107944A JP 2007107944 A JP2007107944 A JP 2007107944A JP 2005297261 A JP2005297261 A JP 2005297261A JP 2005297261 A JP2005297261 A JP 2005297261A JP 2007107944 A JP2007107944 A JP 2007107944A
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optical fiber
needle
tip
face
inspection light
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JP4640642B2 (en
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Kazunori Miyazaki
一徳 宮崎
Tadao Shioyama
忠雄 塩山
Ryoji Koseki
良治 小関
Naoki Nishide
直樹 西出
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Nipro Corp
Shibuya Corp
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Shibuya Kogyo Co Ltd
Nipro Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized easily-handleable needle removal detection device capable of inspecting existence of blood by one optical fiber, and having no possibility of electric shock. <P>SOLUTION: Inspection light a from a laser oscillator (inspection light source) 1 enters the inside from a terminal 3a of the optical fiber 3, and goes out from the end face of a tip part 3b to the outside. In this case, a part of the inspection light is reflected from the end face of the tip part toward the inside of the optical fiber 3, and the reflected light a' is received by a light receiving means 4. When blood adheres onto the end face of the tip part of the optical fiber, a reflected light quantity is changed thereby, to thereby detect existence of blood by a detection means 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は液体の有無を検査する抜針検知装置に関し、より詳しくは、特に血液の漏洩を検査するのに好適な抜針検知装置に関する。   The present invention relates to a needle extraction detecting device for inspecting the presence or absence of liquid, and more particularly to a needle extraction detecting device suitable for inspecting blood leakage.

従来、液体の有無を検査する抜針検知装置として、例えば透析における穿刺部（シャント部）での針の抜針すなわち血液の漏洩を検出するために、その穿刺部に一対の電極を設け、両電極間に血液が付着した際の電流値の変化を検出するようにしたものが知られている（特許文献１）。
また従来、光ファイバを用いた液体検知装置も知られている（特許文献２）。この装置は、２本の光ファイバの途中を溶融結合させておき、一方の光ファイバから他方の光ファイバへ光を伝播できるようにしておく。そして上記溶融部分が乾燥しているか（空気中にあるか）、液中にあるかで光の伝搬量が変化することを検出することにより、液体の有無を検出できるようにしたものである。
実開平５−７９４６８号公報 特開平４−１６０３５０号公報 Conventionally, as a needle removal detection device for inspecting the presence or absence of liquid, for example, in order to detect needle withdrawal at a puncture part (shunt part) in dialysis, that is, leakage of blood, a pair of electrodes is provided at the puncture part. A device that detects a change in current value when blood adheres between electrodes is known (Patent Document 1).
Conventionally, a liquid detection device using an optical fiber is also known (Patent Document 2). This apparatus melts and bonds the two optical fibers in the middle so that light can propagate from one optical fiber to the other optical fiber. The presence or absence of the liquid can be detected by detecting that the amount of light propagation changes depending on whether the melted part is dry (in the air) or in the liquid.
Japanese Utility Model Publication No. 5-79468 JP-A-4-160350

前者の装置においては、一対の電極間に微弱電流を流しておく必要があるので、一対の電極に血液が付着した際に微弱電流による感電を受けるという問題がある。
他方、後者の装置においては、２本の光ファイバの途中を溶融結合させてその結合部分をセンサとして用いるので、検出部分からは４本の光ファイバが伸びることになり、患者への取り付けや４本の光ファイバの取り回しが煩雑になるという欠点がある。
本発明はそのような事情に鑑み、１本の光ファイバで液体の有無を検査可能として、感電の虞のない、小型で取り回しの容易な抜針検知装置を提供するものである。 In the former apparatus, since it is necessary to pass a weak current between the pair of electrodes, there is a problem that when the blood adheres to the pair of electrodes, an electric shock due to the weak current is received.
On the other hand, in the latter device, since the two optical fibers are melt-bonded in the middle and the combined portion is used as a sensor, the four optical fibers extend from the detection portion, and are attached to the patient. There is a drawback that the handling of the optical fiber of the book becomes complicated.
In view of such circumstances, the present invention provides a small-sized and easy-to-handle needle-drawing detection device that can inspect the presence or absence of a liquid with a single optical fiber and that is free from the risk of electric shock.

すなわち請求項１の発明は、検査光を発光する検査光源と、この検査光源からの検査光が内部に入射されるとともに該検査光を先端部端面から外部に出射する光ファイバと、この光ファイバの上記先端部端面から光ファイバの内部に向けて反射された反射光を受光する受光手段と、この受光手段で受光した反射光の光量を検出する検出手段とを備え、上記光ファイバの先端部を送液チューブの針が穿刺された人体の穿刺部近傍に配置し、上記光ファイバの先端部端面への液体の付着の有無による反射光量の変化に基づいて該液体の有無を検出し、これにより人体からの針抜けの有無を検出することを特徴とするものである。   That is, the invention of claim 1 includes an inspection light source that emits inspection light, an optical fiber that receives the inspection light from the inspection light source and emits the inspection light to the outside from the end face of the tip portion, and the optical fiber. A light receiving means for receiving reflected light reflected from the end face of the tip portion toward the inside of the optical fiber, and a detecting means for detecting the amount of reflected light received by the light receiving means, and the tip portion of the optical fiber. Is disposed in the vicinity of the puncture portion of the human body where the needle of the liquid feeding tube is punctured, and the presence or absence of the liquid is detected based on the change in the amount of reflected light due to the presence or absence of the liquid adhering to the end face of the optical fiber. Thus, the presence or absence of needle removal from the human body is detected.

請求項１の発明によれば、検査光源からの検査光は光ファイバの内部に入射されるとともに、該検査光は光ファイバ先端部端面から外部に出射されるようになる。この際、検査光の一部は、上記光ファイバの上記先端部端面から光ファイバの内部に向けて反射されるようになり、この反射光は受光手段で受光されるようになる。上記光ファイバの先端部端面に液体が付着すると、それによって反射光量が変化するので、この反射光量の変化から液体の有無を検出することができる。
したがって、光ファイバは１本あればよいので、光ファイバを４本必要とした従来装置に比較して小型で、かつ取り回しの容易な抜針検知装置を提供することができる。また、液体の有無の検出のために微弱電流を用いていないので、感電の虞もない。 According to the first aspect of the present invention, the inspection light from the inspection light source is incident on the inside of the optical fiber, and the inspection light is emitted to the outside from the end face of the optical fiber tip. At this time, part of the inspection light is reflected toward the inside of the optical fiber from the end face of the optical fiber, and the reflected light is received by the light receiving means. When liquid adheres to the end face of the optical fiber, the amount of reflected light changes accordingly, and the presence or absence of liquid can be detected from the change in the amount of reflected light.
Therefore, since only one optical fiber is required, it is possible to provide a needle detection device that is small and easy to handle as compared with a conventional device that requires four optical fibers. Moreover, since a weak current is not used for detecting the presence or absence of liquid, there is no risk of electric shock.

以下図示実施例について本発明を説明すると、図１において、本実施例では検査光ａを発光する検査光源としてレーザ発振器１を用いており、このレーザ発振器１からのレーザ光（検査光）ａは光分岐素子２を透過して光ファイバ３の末端部３ａからその内部に入射されるようになっている。
図２に示すように、上記光ファイバ３は従来周知のように中心部のファイバコア３Ａと該ファイバコア３Ａの周囲を覆うグラッド３Ｂとを備えており、光ファイバ３の内部に入射されたレーザ光ａは、該光ファイバ３のファイバコア３Ａの内部を案内されてその先端部３ｂの端面から外部に出射されるようになっている。
このとき、上記先端部３ｂの端面から外部に出射されるレーザ光ａの一部は該先端部３ｂの端面によってファイバコア３Ａの内部に向けて反射されるようになる。そしてこの反射光ａ’は、図１に示すように、該光ファイバ３の内部を案内されてその末端部３ａから外部に出射され、この末端部３ａとレーザ発振器１との間に設けた上記光分岐素子２によって反射されて受光手段４で受光されるようになる。
そして上記受光手段４からの信号は検出手段５に入力され、この検出手段５によって受光手段４で受光した反射光の光量が検出されるようになっている。
なお、上記レーザ発振器１、光分岐素子２、光ファイバー３の末端部３ａおよび受光手段４は、図示しないケーシング内に一体的に収容固定されている。 Hereinafter, the present invention will be described with reference to the illustrated embodiment. In FIG. 1, the laser oscillator 1 is used as an inspection light source for emitting the inspection light a in this embodiment, and the laser light (inspection light) a from the laser oscillator 1 is The light is transmitted through the optical branching element 2 and enters the optical fiber 3 from the end portion 3a.
As shown in FIG. 2, the optical fiber 3 includes a fiber core 3 </ b> A at the center and a grad 3 </ b> B covering the periphery of the fiber core 3 </ b> A as is conventionally known. The light a is guided inside the fiber core 3A of the optical fiber 3 and emitted from the end face of the tip portion 3b to the outside.
At this time, a part of the laser beam a emitted to the outside from the end surface of the tip portion 3b is reflected toward the inside of the fiber core 3A by the end surface of the tip portion 3b. As shown in FIG. 1, the reflected light a ′ is guided inside the optical fiber 3 and emitted from the end portion 3a to the outside. The reflected light a ′ is provided between the end portion 3a and the laser oscillator 1. The light is reflected by the light branching element 2 and received by the light receiving means 4.
The signal from the light receiving means 4 is input to the detecting means 5, and the amount of reflected light received by the light receiving means 4 is detected by the detecting means 5.
The laser oscillator 1, the optical branching element 2, the end portion 3a of the optical fiber 3 and the light receiving means 4 are integrally housed and fixed in a casing (not shown).

ところで、通常の状態では、上記光ファイバ３の先端部３ｂの端面は空気中に曝されて乾燥された状態に保持されており、この状態での先端部３ｂの端面の空気中反射率は、例えばファイバコア３ＡがＮｃ≒１．８のものである場合には、約８．２％と高い反射率となる。他方、先端部３ｂの端面が水や血液等の液体によって濡らされると、その水中反射率は約１．５％と低い反射率となる。
したがって、上記光ファイバの先端部３ｂの端面への液体の付着の有無による反射光量の変化を上記検出手段５によって検出すれば、液体の有無を検出することができるようになる。 By the way, in the normal state, the end face of the tip portion 3b of the optical fiber 3 is held in a dry state exposed to air, and the reflectance in the air of the end face of the tip portion 3b in this state is For example, when the fiber core 3A has Nc≈1.8, the reflectance is as high as about 8.2%. On the other hand, when the end face of the tip 3b is wetted by a liquid such as water or blood, the reflectance in water is as low as about 1.5%.
Therefore, the presence or absence of liquid can be detected by detecting the change in the amount of reflected light due to the presence or absence of liquid adhering to the end face of the distal end portion 3b of the optical fiber.

次に、図１に示す実施例は、血液の流出を検出して人体に穿刺された針の抜針を検出する抜針検知装置であって、例えば血液透析（ＨＤ）、血液濾過（ＨＦ）、血液濾過透析（ＨＤＦ）、持続緩徐式血液透析（ＣＨＤ）、持続緩徐式血液濾過（ＣＨＦ）、持続緩徐式血液濾過透析（ＣＨＤＦ）、血漿交換等の血液体外循環機器を用いた治療において用いることができる。
本実施例では、上記光ファイバ３の先端部３ｂは、ファイバ保持部１１を介してカバー部材１２のカップ状部１３に取り付けてある。
上記カップ状部１３は、図１、図３に示すように、透明で弾性を有する材料によって楕円形状のカップ状に形成してあり、該カップ状部１３の周囲に弾性を有する平板状の基部１４を連設してある。そして該基部１４の上記カップ状部１３とは反対側に弾性を有するチューブ支持部１５を一体に連設してあり、このチューブ支持部１５に、先端部に針１６を備えた送液チューブ１７が取り付けられている。
上記チューブ１７は、例えば血液透析装置の静脈側チューブであって、上記針１６は人体１８（図４）に穿刺されて、血液透析装置を通過してチューブ１７に送出された血液を人体１８に戻すことができるようになっている。
そして上記チューブ１７の先端部にはフランジ１９が設けられ、このフランジ１９はチューブ支持部１５のカップ状部１３側の端面に当接されて、チューブ１７がチューブ支持部１５から抜け出ることがないようにしてある。 Next, the embodiment shown in FIG. 1 is a needle removal detection device that detects the withdrawal of a needle that has been punctured into a human body by detecting the outflow of blood, for example, hemodialysis (HD), blood filtration (HF). , Blood filtration dialysis (HDF), continuous slow hemodialysis (CHD), continuous slow hemofiltration (CHF), continuous slow hemofiltration dialysis (CHDF), used in treatment using blood extracorporeal circulation equipment such as plasma exchange be able to.
In the present embodiment, the tip portion 3 b of the optical fiber 3 is attached to the cup-shaped portion 13 of the cover member 12 via the fiber holding portion 11.
As shown in FIGS. 1 and 3, the cup-shaped portion 13 is formed into an elliptical cup shape by a transparent and elastic material, and a flat plate-shaped base portion having elasticity around the cup-shaped portion 13. 14 is connected. A tube support portion 15 having elasticity is integrally provided on the opposite side of the base portion 14 from the cup-shaped portion 13, and the liquid supply tube 17 provided with a needle 16 at the distal end portion of the tube support portion 15. Is attached.
The tube 17 is, for example, a venous side tube of a hemodialysis apparatus, and the needle 16 is punctured into a human body 18 (FIG. 4), and blood sent to the tube 17 through the hemodialysis apparatus is passed to the human body 18. It can be returned.
A flange 19 is provided at the tip of the tube 17, and the flange 19 is brought into contact with the end surface of the tube support 15 on the cup-shaped portion 13 side so that the tube 17 does not come out of the tube support 15. It is.

上記チューブ１７はチューブ支持部１５に斜めに取り付けてあり、図１に示すチューブ支持部１５の自然状態では、チューブ１７はチューブ支持部１５の弾性により平板状の基部１４に対して斜めの状態に保持されている。
この状態では、上記針１６の先端部はカップ状部１３の内部に収容されて上記光ファイバ３の先端部３ｂにほぼ向かい合うようになっており、この状態で上記チューブ１７からの血液が針１６の先端部から噴出された際には、該血液が光ファイバ３の先端部３ｂの端面に付着し得るようになっている。
そして上記針１６の先端部は、図４に示すように、チューブ支持部１５やカバー部材１２の弾性に抗してチューブ１７を揺動させた際に、カバー部材１２の外部に露出させることができるようになっており、この状態で針１６を人体１８に穿刺することができるようになっている。 The tube 17 is attached to the tube support portion 15 at an angle. In the natural state of the tube support portion 15 shown in FIG. 1, the tube 17 is inclined with respect to the flat base portion 14 due to the elasticity of the tube support portion 15. Is retained.
In this state, the distal end portion of the needle 16 is accommodated in the cup-shaped portion 13 so as to face the distal end portion 3 b of the optical fiber 3, and in this state, blood from the tube 17 is passed through the needle 16. The blood can adhere to the end face of the tip 3b of the optical fiber 3 when it is ejected from the tip.
As shown in FIG. 4, the tip of the needle 16 is exposed to the outside of the cover member 12 when the tube 17 is swung against the elasticity of the tube support 15 and the cover member 12. In this state, the needle 16 can be punctured into the human body 18.

以上の構成を有する抜針検知装置において、針１６を人体１８に穿刺する際には、上述したようにチューブ支持部１５やカバー部材１２の弾性に抗してチューブ１７を揺動させて、針１６の先端部をカバー部材１２の外部に露出させればよい。
そして針１６を人体１８に穿刺したら、図４に示すように、ガーゼ付きテープ２１で針１６を人体１８に固定するとともに、複数のテープ２２でチューブ１７を人体１８に固定する。次に、カバー部材１２の基部１４を人体に密着させて該基部１４をテープ２２で人体に固定すれば、該カバー部材１２のカップ状部１３で針１６および上記光ファイバ３の先端部３ｂをその内部に収容した状態で覆わせることができ、これによって光ファイバ３の先端部３ｂを針１６が穿刺された人体１８の穿刺部近傍に配置させている。
この状態から、万一、チューブ１７が引っ張られたりカバー部材１２が人体１８から引き剥がされて針１６が人体１８から抜針された際には、図１に示すように、針１６の先端部はチューブ支持部１５やカバー部材１２の弾性によって光ファイバ３の先端部３ｂにほぼ向かい合うようになるので、針１６の先端部から噴出された血液が光ファイバ３の先端部３ｂの端面に付着し易くなる。
そして血液が光ファイバ３の先端部３ｂの端面に付着すれば、前述したようにその先端部３ｂの端面の反射率が変化して反射光量が変化するので、上記検出手段５はその変化から抜針を検出して警報を発するようになる。
特に、上記チューブ１７が血液を体内に戻す静脈側チューブの場合には、人体から針１６が抜けると血液ポンプから送られる血液が針１６から大量に噴出し、カップ状部１３の内面ではね返って光ファイバ３の先端部３ｂを覆うため、即座に警報を発することができる。また、カバー部材１２が剥がされずにその内部で針１６が抜け出るなどして血液が漏れだした場合でも、カップ状部１３の内部が血液で満たされて光ファイバ３の先端部３ｂを覆うため、やはり即座に警報を発することができる。 In the needle extraction detecting device having the above configuration, when the needle 16 is punctured into the human body 18, the tube 17 is swung against the elasticity of the tube support portion 15 and the cover member 12 as described above, and the needle is detected. What is necessary is just to expose the front-end | tip part of 16 to the exterior of the cover member 12. FIG.
When the needle 16 is punctured into the human body 18, as shown in FIG. 4, the needle 16 is fixed to the human body 18 with the tape 21 with gauze and the tube 17 is fixed to the human body 18 with the plurality of tapes 22. Next, when the base portion 14 of the cover member 12 is brought into close contact with the human body and the base portion 14 is fixed to the human body with the tape 22, the needle 16 and the distal end portion 3b of the optical fiber 3 are connected with the cup-shaped portion 13 of the cover member 12. The optical fiber 3 can be covered in a state of being accommodated therein, whereby the distal end portion 3b of the optical fiber 3 is disposed in the vicinity of the puncture portion of the human body 18 into which the needle 16 is punctured.
From this state, if the tube 17 is pulled or the cover member 12 is peeled off from the human body 18 and the needle 16 is removed from the human body 18, as shown in FIG. Since the tube support portion 15 and the cover member 12 are elastic, they almost face the distal end portion 3b of the optical fiber 3, so that blood ejected from the distal end portion of the needle 16 adheres to the end surface of the distal end portion 3b of the optical fiber 3. It becomes easy.
If blood adheres to the end face of the tip 3b of the optical fiber 3, the reflectance of the end face of the tip 3b changes as described above and the amount of reflected light changes. An alarm is issued when a needle is detected.
In particular, in the case where the tube 17 is a vein-side tube that returns blood to the body, when the needle 16 is removed from the human body, a large amount of blood sent from the blood pump is ejected from the needle 16 and rebounds on the inner surface of the cup-shaped portion 13. Since the tip 3b of the optical fiber 3 is covered, an alarm can be immediately issued. Further, even if the cover member 12 is not peeled off and the blood leaks due to the needle 16 being pulled out, the inside of the cup-shaped portion 13 is filled with blood to cover the distal end portion 3b of the optical fiber 3, An alarm can be issued immediately.

図５は本発明の第２実施例を示したもので、上記実施例の簡素化を図ったものである。すなわち本実施例では上記カバー部材１２としてガーゼを利用しており、また光ファイバ３とチューブ１７とは少なくともその先端部が相互に平行となるように配置してある。
上記光ファイバ３の先端部３ｂの端面は、上記チューブ１７の先端部に設けた針１６の先端部よりも、予め定めた所要距離δだけ後退させて根元側に配置し、それによって針１６の先端部を人体１８に穿刺することができるようにして、光ファイバ３の先端部３ｂを針１６が穿刺された人体１８の穿刺部近傍に配置させている。
そして針１６の先端部を人体１８に穿刺した際には、ガーゼ付きテープ２１で針１６を人体１８に固定するとともに該針１６をガーゼで覆わせ、さらに複数のテープ２２でチューブ１７を人体１８に固定することができる。
本実施例においては、針１６が人体１８から抜針された際には、針１６の先端部から噴出された血液はガーゼ付きテープ２１のガーゼに付着されて吸収されるようになり、このガーゼに付着された血液が光ファイバ３の先端部３ｂの端面に付着すると、警報が発せられるようになる。
このとき上述したように、上記チューブ１７が血液を体内に戻す静脈側チューブの場合には、人体から針１６が抜けると血液ポンプから送られる血液が針１６から大量に噴出するので、ガーゼが直ちに血液で満たされて光ファイバ３の先端部３ｂを覆うため、やはり即座に警報を発することができる。 FIG. 5 shows a second embodiment of the present invention, which simplifies the above embodiment. That is, in this embodiment, gauze is used as the cover member 12, and the optical fiber 3 and the tube 17 are arranged so that at least their distal ends are parallel to each other.
The end face of the distal end portion 3b of the optical fiber 3 is disposed at the root side by being retracted by a predetermined distance δ from the distal end portion of the needle 16 provided at the distal end portion of the tube 17, whereby the needle 16 The distal end portion 3b of the optical fiber 3 is disposed in the vicinity of the puncture portion of the human body 18 into which the needle 16 has been punctured so that the distal end portion can be punctured into the human body 18.
When the tip of the needle 16 is punctured into the human body 18, the needle 16 is fixed to the human body 18 with the gauze tape 21, the needle 16 is covered with the gauze, and the tube 17 is attached to the human body 18 with a plurality of tapes 22. Can be fixed to.
In this embodiment, when the needle 16 is removed from the human body 18, the blood ejected from the tip of the needle 16 is attached to and absorbed by the gauze of the tape 21 with gauze. When the blood adhering to is attached to the end face of the tip 3b of the optical fiber 3, an alarm is issued.
At this time, as described above, in the case where the tube 17 is a vein-side tube for returning blood to the body, a large amount of blood sent from the blood pump is ejected from the needle 16 when the needle 16 is removed from the human body. Since it is filled with blood and covers the tip 3b of the optical fiber 3, an alarm can be immediately issued.

本発明の第１実施例を示す部分断面図。1 is a partial sectional view showing a first embodiment of the present invention. 図１に示す光ファイバ３の先端部３ｂの拡大断面図。要部の平面図。The expanded sectional view of the front-end | tip part 3b of the optical fiber 3 shown in FIG. The top view of the principal part. 図１の要部の平面図。The top view of the principal part of FIG. 使用状態を説明する部分断面図。The fragmentary sectional view explaining the use condition. 本発明の第２実施例を示す側面図。The side view which shows 2nd Example of this invention.

符号の説明Explanation of symbols

１ レーザ発振器（検査光源） ２ 光分岐素子
３ 光ファイバ ３ａ 末端部
３ｂ 先端部 ４ 受光手段
５ 検出手段 １１ ファイバ保持部
１２ カバー部材 １３ カップ状部
１４ 基部 １５ チューブ支持部
１６ 針 １７ チューブ DESCRIPTION OF SYMBOLS 1 Laser oscillator (inspection light source) 2 Optical branching element 3 Optical fiber 3a Terminal part 3b Tip part 4 Light receiving means 5 Detection means 11 Fiber holding part 12 Cover member 13 Cup-shaped part 14 Base 15 Tube support part 16 Needle 17 Tube

Claims (5)

検査光を発光する検査光源と、この検査光源からの検査光が内部に入射されるとともに該検査光を先端部端面から外部に出射する光ファイバと、この光ファイバの上記先端部端面から光ファイバの内部に向けて反射された反射光を受光する受光手段と、この受光手段で受光した反射光の光量を検出する検出手段とを備え、上記光ファイバの先端部を送液チューブの針が穿刺された人体の穿刺部近傍に配置し、上記光ファイバの先端部端面への液体の付着の有無による反射光量の変化に基づいて該液体の有無を検出し、これにより人体からの針抜けの有無を検出することを特徴とする抜針検知装置。   An inspection light source that emits inspection light, an optical fiber that receives the inspection light from the inspection light source and emits the inspection light to the outside from the end face of the tip, and an optical fiber from the end face of the tip of the optical fiber A light receiving means for receiving the reflected light reflected toward the inside of the optical fiber, and a detecting means for detecting the amount of the reflected light received by the light receiving means, and the needle of the liquid feeding tube punctures the tip of the optical fiber. Placed near the puncture portion of the human body, and the presence or absence of the liquid is detected based on the change in the amount of reflected light due to the presence or absence of the liquid adhering to the end face of the optical fiber, whereby the presence or absence of needle removal from the human body A needle removal detection device characterized by detecting the above. 上記検査光源と光ファイバの末端部との間に光分岐素子が設けられ、検査光源からの検査光は光分岐素子を介して光ファイバの末端部からその内部に入射されるとともに、光ファイバの末端部から出射された反射光は光分岐素子で分岐されて受光手段で受光されることを特徴とする請求項１に記載の抜針検知装置。   An optical branching element is provided between the inspection light source and the end of the optical fiber. Inspection light from the inspection light source is incident on the inside of the optical fiber through the optical branching element, and the optical fiber. 2. The needle extraction detection apparatus according to claim 1, wherein the reflected light emitted from the end portion is branched by the light branching element and received by the light receiving means. 上記光ファイバの先端部と上記人体の穿刺部をカバー部材で覆うことを特徴とする請求項１又は請求項２に記載の抜針検知装置。   The needle extraction detection device according to claim 1 or 2, wherein the tip portion of the optical fiber and the puncture portion of the human body are covered with a cover member. 上記光ファイバの先端部がカバー部材に取り付けられるとともに、上記送液チューブがチューブ支持部を介して該カバー部材に取り付けられ、上記針はカバー部材の外部に露出可能となっているとともに、自然状態ではチューブ支持部の弾性力によりカバー部材の内部に収容されて上記光ファイバの先端部にほぼ向かい合うように配置され、針から噴出する液体が光ファイバの先端部端面に付着し得るようになっていることを特徴とする請求項３に記載の抜針検知装置。   The tip of the optical fiber is attached to a cover member, the liquid feeding tube is attached to the cover member via a tube support portion, and the needle can be exposed to the outside of the cover member. Then, it is accommodated inside the cover member by the elastic force of the tube support part and is arranged so as to face the tip part of the optical fiber, so that the liquid ejected from the needle can adhere to the end face of the tip part of the optical fiber. The needle extraction detection device according to claim 3, wherein 上記光ファイバの先端部は送液チューブに沿って配置され、かつ光ファイバの先端部端面は針の先端より所要距離だけ後退させて配置されていることを特徴とする請求項１ないし請求項３のいずれかに記載の抜針検知装置。   4. The optical fiber according to claim 1, wherein the tip of the optical fiber is disposed along the liquid feeding tube, and the end surface of the tip of the optical fiber is disposed with a required distance from the tip of the needle. The needle removal detection device according to any one of the above.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108303217A (en) * 2018-02-08 2018-07-20 江苏九九久科技有限公司 The monitoring device of leakage hydrogen fluoride in heat exchanger
CN113804383A (en) * 2021-11-18 2021-12-17 山东科锐医疗用品有限公司 Vibration detection device for needle of insulin injection pen

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JPS61280541A (en) * 1985-06-05 1986-12-11 Power Reactor & Nuclear Fuel Dev Corp Method for detecting leakage of liquid
JPS6269135A (en) * 1985-09-20 1987-03-30 Kuraray Co Ltd Liquid leak detector
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108303217A (en) * 2018-02-08 2018-07-20 江苏九九久科技有限公司 The monitoring device of leakage hydrogen fluoride in heat exchanger
CN108303217B (en) * 2018-02-08 2020-05-19 江苏九九久科技有限公司 Device for monitoring hydrogen fluoride leaking in heat exchanger
CN113804383A (en) * 2021-11-18 2021-12-17 山东科锐医疗用品有限公司 Vibration detection device for needle of insulin injection pen
CN113804383B (en) * 2021-11-18 2022-02-22 山东科锐医疗用品有限公司 Vibration detection device for needle of insulin injection pen

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