JP2016077450A - Medical tube - Google Patents

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JP2016077450A
JP2016077450A JP2014210772A JP2014210772A JP2016077450A JP 2016077450 A JP2016077450 A JP 2016077450A JP 2014210772 A JP2014210772 A JP 2014210772A JP 2014210772 A JP2014210772 A JP 2014210772A JP 2016077450 A JP2016077450 A JP 2016077450A
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tube
pair
stomach
tip
conductors
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井上　純一
Junichi Inoue
純一 井上
重徳 逸崎
Shigenori Itsuzaki
重徳 逸崎
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Tatsuta Electric Wire and Cable Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To detect a tip position of a medical tube P inserted into a body with a simple configuration.SOLUTION: There is provided a medical tube that is indwelt in the stomach or the small intestine through the nose to feed nutrients to the intestine by tube feeding. A detection line 20 composed of a pair of insulated electric wires 21 is inserted to the tip of a tube body 10, the insertion end being a sensor part 22. When a detection part at the tip of the tube reaches a required position of the stomach or the small intestine, an insulation coating 21b of the detection part melts by stomach juice or intestinal juice so that conductors 21a of the insulated electric wires are short-circuited. The short circuit is detected by a change in the voltage of a voltmeter provided at a base end of the detection line, and it is known that the detection part (tube body tip) has reached the required position of the stomach or the small intestine. At this time, if the pair of insulated electric wires are twisted, the pair of conductors 21a come closer to each other by the twisting force and are short-circuited when the insulation coating of the detection part melts by stomach juice, etc. Thereby, the position detection by the detection part is ensured.SELECTED DRAWING: Figure 1

Description

この発明は、栄養（造影剤も含む）を腸内に補給するための医療用チューブに関するものである。   The present invention relates to a medical tube for supplying nutrition (including a contrast medium) into the intestine.

この種の食道経由経腸栄養用チューブは、経鼻的に胃又は小腸に留置し経管的に栄養を腸内に補給するためのものであって、通常、Ｘ線不透過線が施され、先端に錘を有する。
この医療用チューブの体内への挿入時、体内の所要の位置、例えば、胃内にチューブの先端が至ったかを確認する必要がある。仮に、誤って気管や肺などの呼吸器管に挿入留置された状態で、患者に栄養剤が投与されてしまうと、肺炎や窒息（肺機能障害）などを引き起こし、時には、生命の危機に晒されてしまう恐れがあるからである。
その先端位置の検出のため、上記のように、チューブ先端にはＸ線不透過線が施されており、Ｘ線投射によってチューブ先端を検出するようになっている。 This type of tube for enteral feeding via the esophagus is intended to be placed in the stomach or small intestine nasally and supplemented with nutrients into the intestine via the nasal passage, and is usually radiopaque. , Have a weight at the tip.
When inserting the medical tube into the body, it is necessary to confirm whether the distal end of the tube has reached a required position in the body, for example, the stomach. If the patient is accidentally inserted and placed in the respiratory tract such as the trachea or lungs, if the patient is given nutrients, it may cause pneumonia, suffocation (pulmonary dysfunction), etc. It is because there is a risk of being done.
In order to detect the tip position, as described above, an X-ray opaque line is applied to the tube tip, and the tube tip is detected by X-ray projection.

しかし、そのＸ線投射は、人体に対する影響があり、また、そのＸ線投射装置も大型化するため、その体内に挿入されたチューブの先端の位置を簡易に検出する種々の技術が考案されている。その一つとして、チューブに体液との接触によって色変化をするインジケータを設け、施術者がその色変化を確認する、例えば、胃液に接触して色変化することによってチューブの先端が胃内に至ったことを検出する技術が開示されている（特許文献１請求項１、２参照）。
また、他の技術として、チューブの先端に磁石を設け、その磁石を外部から検出することによってチューブの先端を検出するものがある（特許文献２請求項１）。 However, since the X-ray projection has an influence on the human body and the X-ray projection apparatus is also enlarged, various techniques for easily detecting the position of the tip of the tube inserted into the body have been devised. Yes. As an example, an indicator that changes color by contact with body fluid is provided on the tube, and the practitioner confirms the color change.For example, when the color changes by contacting gastric fluid, the tip of the tube reaches the stomach. Is disclosed (see Patent Document 1, Claims 1 and 2).
As another technique, there is a technique in which a magnet is provided at the tip of a tube, and the tip of the tube is detected by detecting the magnet from the outside (Patent Document 2, Claim 1).

特許第４６０５１５９号公報Japanese Patent No. 4605159 特許第３５６６２９３号公報Japanese Patent No. 3566293

特許文献１記載の技術は、インジケータが施術者の手元、すなわちチューブの基端に位置するため、そのチューブ基端まで体液を吸引してインジケータの色変化を目視によって確認するものであり、その検出精度に問題がある。
また、特許文献２記載の技術は、その装置はＸ線投射装置に比べれば小型であるが、磁石からの磁場を測定するため、比較的大がかりな装置を必要とし、設置スペースやコスト的に問題がある。 In the technique described in Patent Document 1, since the indicator is located at the practitioner's hand, that is, at the proximal end of the tube, body fluid is sucked up to the proximal end of the tube and the color change of the indicator is visually confirmed. There is a problem with accuracy.
The technique described in Patent Document 2 is smaller than the X-ray projection apparatus, but requires a relatively large apparatus for measuring the magnetic field from the magnet, and is problematic in terms of installation space and cost. There is.

この発明は、以上の実状の下、簡単な構造で体内に挿入された医療用チューブの先端位置を検出し得るようにすることを課題とする。   This invention makes it a subject to enable it to detect the front-end | tip position of the medical tube inserted in the body with the simple structure under the above actual condition.

上記課題を達成するため、この発明は、漏液検知線等の対の検知線において、液が漏れると、その検知線が短絡し（この「短絡」には、絶縁被覆に液が触れても対の検知線の導体が接触することなくその検知線の間の電気抵抗が低下する場合も含む、以下同じ）、又は、対の検知線の絶縁被覆が液によって溶解すると、その検知線が短絡し、それらの短絡を検知線の基端で検出し得ることに着目し、その対の検知線と同等の検知線を医療用チューブに挿入することとしたのである。
このようにすれば、漏液等と同様に、胃液又は腸液によって、対の検知線の短絡が生じ、その検知線の基端において、その抵抗変化を測定すれば、チューブが胃又は腸に至ったことを確認できる。 In order to achieve the above object, according to the present invention, when a liquid leaks in a pair of detection lines such as a liquid leakage detection line, the detection line is short-circuited. The same applies to the case where the electrical resistance between the sensing wires of the pair of sensing wires decreases without contact, and the same applies to the other), or when the insulating coating of the sensing wires of the pair is dissolved by the liquid, the sensing wires are short-circuited. Then, focusing on the fact that these short circuits can be detected at the base end of the detection line, a detection line equivalent to the pair of detection lines is inserted into the medical tube.
In this way, as in the case of leakage, gastric juice or intestinal fluid causes a short circuit of the pair of detection lines, and if the resistance change is measured at the proximal end of the detection line, the tube reaches the stomach or intestine. Can be confirmed.

この発明の構成としては、経鼻的に胃又は小腸に留置し経管的に栄養を腸内に補給するための医療用チューブにおいて、そのチューブ本体の基端から先端まで検知線が挿入され、その検知線は対の絶縁電線からなってその対の絶縁電線の先端によってセンサ部が形成され、そのセンサ部は、絶縁被覆が胃又は小腸の所要位置に挿入された時点における胃液又は腸液との接触により同対の導体間の抵抗値を変化させるものであり、検知線の基端の両絶縁電線間の前記抵抗値の変化による電圧変化によってチューブ本体の先端が前記所要位置に達したことを検出する構成を採用することができる。   As a configuration of this invention, in a medical tube for instilling in the stomach or small intestine nasally and replenishing nutrients into the intestine by tube, a detection line is inserted from the proximal end to the distal end of the tube body, The detection line is composed of a pair of insulated wires, and a sensor portion is formed by the tip of the pair of insulated wires. The resistance value between the pair of conductors is changed by contact, and the tip of the tube body has reached the required position due to the voltage change due to the change in the resistance value between the two insulated wires at the base end of the detection line. A configuration for detection can be employed.

この構成において、上記対の絶縁電線が撚られて、上記胃液又は腸液により、電線挿入端の絶縁被覆が溶解すると、その対の電線挿入端間が前記撚り力によって近づく構成を採用することができる。
上記対の絶縁電線を撚る際、絶縁電線内に撚り力による内部応力が残存するようにその撚りを行うと、上記胃液又は腸液により、センサ部の絶縁被覆が溶解等した際、その対の導体間が前記撚り力によって近づくこととなる。導体間が近づけば、その導体間の電気抵抗が低下したり、両電線が接触したりする。この電気抵抗の変化や接触による電気抵抗変化を、絶縁電線の基端の間に設けた電気抵抗変化検出器（電圧器等）によって検出する。この検出によって、電線先端（センサ部）が胃内又は腸内の所要位置に至ったことを検出する。 In this configuration, when the pair of insulated wires are twisted and the insulating coating at the wire insertion end is dissolved by the gastric juice or intestinal fluid, the configuration in which the pair of wire insertion ends approaches by the twisting force can be employed. .
When twisting the pair of insulated wires, if the twist is performed so that the internal stress due to the twisting force remains in the insulated wires, the gastric juice or intestinal fluid will dissolve the insulation coating of the sensor unit, etc. The conductors approach each other due to the twisting force. When the conductors are brought close to each other, the electrical resistance between the conductors is reduced, or both electric wires are in contact with each other. The change in electrical resistance and the change in electrical resistance due to contact are detected by an electrical resistance change detector (voltage device or the like) provided between the base ends of the insulated wires. By this detection, it is detected that the tip of the electric wire (sensor unit) has reached a required position in the stomach or intestine.

この発明は、以上のように構成したので、検知線の基端によって、医療用チューブ先端が胃又は腸内に至ったことを容易に検出することができる。   Since the present invention is configured as described above, it can be easily detected that the distal end of the medical tube has reached the stomach or intestine by the proximal end of the detection line.

この発明に係る医療用チューブの一実施形態の概略一部省略正面図Briefly omitted front view of one embodiment of a medical tube according to the present invention 同実施形態の検知線を示し、（ａ）は概略正面図、（ｂ）は断面図The detection line of the same embodiment is shown, (a) is a schematic front view, (b) is a sectional view. 同実施形態の作用説明図Action explanatory diagram of the same embodiment 他の実施形態の各検知線の断面図Sectional drawing of each detection line of other embodiment 他の実施形態のチューブの断面図Cross-sectional view of a tube of another embodiment

この発明に係わる医療用チューブ（食道経由経腸栄養用チューブ）Ｐの一実施形態を図１〜図３に示し、この医療用チューブＰは、従来と同様に、樹脂製の柔軟性を有するチューブ本体（カニューレ）１０とガイド用スタイレット２０とからなる。そのチューブ本体１０の基端部にスタイレット２０の挿入口１１及び側注ポート１２が設けられており、それらのキャップ１３ａ、１３ｂが付設されている。スタイレット２０をチューブ本体１０に挿入し終わると、その基端はコネクタ１４によってチューブ本体１０の基端に固定させる。   One embodiment of a medical tube (esophageal enteral feeding tube) P according to the present invention is shown in FIG. 1 to FIG. 3, and this medical tube P is a resin-made flexible tube as in the prior art. It consists of a body (cannula) 10 and a guide stylet 20. An insertion port 11 and a side injection port 12 for the stylet 20 are provided at a proximal end portion of the tube body 10, and caps 13 a and 13 b are attached thereto. When the stylet 20 has been inserted into the tube body 10, the base end thereof is fixed to the base end of the tube body 10 by the connector 14.

チューブ本体１０の長さ方向表面には、側注ポート１２から、５０ｃｍ、６０ｃｍ、７０ｃｍ及び８０ｃｍ等の位置にデブマーク（図示せず）が設けられている。また、チューブ本体１０の先端部には側孔１５が形成された後、重り部（錘）１６が設けられており、その重り部１６を案内としてチューブ本体１０が胃・腸内に挿入される。チューブ本体１０の先端部が胃又は腸の所要位置に至れば、側注ポート１２からチューブ本体１０内に栄養液等を送り込むことによって、その栄養液等がチューブ本体１０内を通って前記側孔１５に至り、その側孔１５から流れ出て胃内又は腸内に出る。以上の構成は従来と同様である。なお、重り部１６は適宜に省略される。   On the surface in the length direction of the tube main body 10, deb marks (not shown) are provided from the side injection port 12 at positions such as 50 cm, 60 cm, 70 cm and 80 cm. Further, after the side hole 15 is formed at the distal end portion of the tube main body 10, a weight portion (weight) 16 is provided, and the tube main body 10 is inserted into the stomach / intestine using the weight portion 16 as a guide. . When the distal end portion of the tube main body 10 reaches the required position of the stomach or intestine, the nutrient solution or the like is fed into the tube main body 10 from the side injection port 12 so that the nutrient solution passes through the tube main body 10 and the side hole. 15 and flows out of the side hole 15 and into the stomach or intestine. The above configuration is the same as the conventional one. The weight portion 16 is omitted as appropriate.

この発明に係る医療用チューブＰは、上記スタイレット２０を対の絶縁電線２１、２１によって構成して検知線とした点が特徴である。検知線２０の絶縁電線（電極線）２１、２１は、単線導体２１ａの外周にゼラチンの絶縁被覆２１ｂを施したものであり、その先端部がセンサ部２２となっている。ゼラチン製絶縁被覆２１ｂは胃液に接すると溶解するため、センサ部２２の導体２１ａ、２１ａ間は後述のように電気抵抗が低下する。このとき、センサ部２２のみが胃液によって溶解すれば良いため、センサ部２２の絶縁被覆２１ｂのみを胃液に接して溶解するものとし得る。すなわち、センサ部２２以外の絶縁被覆２１ｂは人体に影響がない他の材料、例えば、塩化ビニル等を採用することができる。導体２１ａは撚り線とし得る。絶縁被覆２１ｂはゼラチン以外、例えば、ブルラン、ヒドロキシプロピルメチルセルロース（ＨＰＭＣ）、ポリビニルアルコール（ＰＶＡ）コポリマー（ポリビニルアルコール・アクリル酸・メタクリル酸メチル共重合体）等の体液によって溶解する適宜な材料を採用し得る。   The medical tube P according to the present invention is characterized in that the stylet 20 is constituted by a pair of insulated wires 21 and 21 to form a detection line. The insulated wires (electrode wires) 21, 21 of the detection wire 20 are obtained by applying an insulating coating 21 b of gelatin to the outer periphery of the single wire conductor 21 a, and the tip portion thereof is a sensor portion 22. Since the gelatin insulating coating 21b dissolves when it comes into contact with the gastric juice, the electrical resistance between the conductors 21a, 21a of the sensor portion 22 decreases as described later. At this time, since only the sensor unit 22 needs to be dissolved by the gastric juice, only the insulating coating 21b of the sensor unit 22 can be dissolved in contact with the gastric juice. That is, the insulating coating 21b other than the sensor unit 22 can employ other materials that do not affect the human body, such as vinyl chloride. The conductor 21a may be a stranded wire. The insulating coating 21b employs an appropriate material other than gelatin such as, for example, bullulan, hydroxypropylmethylcellulose (HPMC), polyvinyl alcohol (PVA) copolymer (polyvinyl alcohol / acrylic acid / methyl methacrylate copolymer) and the like. obtain.

検知線２０の対の絶縁電線２１、２１は撚り合わされた撚り線となっており、その撚り度合いは、絶縁電線２１内に撚り力による内部応力が残存するようにされている。
このため、図３（ａ）に示すように、センサ部２２において、胃液に振れる前は、絶縁被覆２１ｂによって導体２１ａ、２１ａ間が絶縁されているが、胃液に触れると、その絶縁被覆２１ｂが溶けて導体２１ａ、２１ａがさらに撚り合わされて接触したり、接触しないまでも、極めて近接したりする（同図（ｂ）参照）。また、胃液は酸性であって導電性を有する。このため、対の絶縁電線２１、２１（導体２１ａ、２１ａ）間の電気抵抗は低下する（短絡する）。なお、図３においては、絶縁電線２１、２１は撚り合わせ間に空隙ｓを記載しているが、これは、前記の導体２１ａ、２１ａの近接作用を誇張するためであって、通常、撚り線はその空隙ｓは殆ど生じない。 The pair of insulated wires 21 and 21 of the detection wire 20 is a twisted wire, and the degree of twist is such that internal stress due to twisting force remains in the insulated wire 21.
For this reason, as shown in FIG. 3A, in the sensor unit 22, the conductors 21a and 21a are insulated from each other by the insulating coating 21b before the gastric juice is shaken. Even if the conductors 21a and 21a are melted and come into contact with each other or do not come into contact with each other, they are very close to each other (see FIG. 5B). Gastric juice is acidic and has electrical conductivity. For this reason, the electrical resistance between the pair of insulated wires 21 and 21 (conductors 21a and 21a) decreases (short-circuits). In FIG. 3, the insulated wires 21 and 21 have gaps s between the twists, but this is to exaggerate the proximity action of the conductors 21a and 21a. The gap s hardly occurs.

その電気抵抗の低下をコネクタ１４から導き出した導体２１ａ、２１ａ間の電圧計Ｖの電圧変化によって検出する（図２（ａ）参照）。この信号を点灯や称呼等によって、施術者がその検出を確認する。この確認によって、チューブ本体１０の先端部（センサ部２２）が胃内に至ったことを確認できる。   The decrease in the electrical resistance is detected by the voltage change of the voltmeter V between the conductors 21a and 21a led out from the connector 14 (see FIG. 2A). The practitioner confirms the detection of this signal by lighting or naming it. By this confirmation, it can be confirmed that the distal end portion (sensor portion 22) of the tube main body 10 has reached the stomach.

上記実施形態の検知線２０は、絶縁電線２１を撚り合わせたものとしたが、単に並行な物でも良く、その際、図４（ａ）に示すように、導体２１ａ、２１ａの並行を保って絶縁被覆２１ｂを行ったものとすることができる。また、絶縁被覆２１ｂは、漏液検知線と同様に、図４（ｂ）に示すように、編組２１ｃによって構成することもできる。編組２１ｃ等のように、胃液等によって溶けない絶縁被覆の場合は、胃液がその絶縁被覆内に浸潤し、その胃液の導電性（イオン化）によって導体２１ａの間の電気抵抗が低下し、その低下を検出することとなる。この導電性の作用は、絶縁被覆２１ｂが完全に溶けずに、両導体２１ａ、２１ａが接触しない場合においても得ることができる。
なお、胃液等の体液の場合、絶縁被覆２１ｂがその体液の特定の水素イオン濃度等で溶解するものであれば、腫瘍ができて胃液の水素イオン濃度が変化している等の特定の水素イオン濃度の胃内等の異常部位を確認できる。この確認作用は、医療用チューブＰへ挿入した検知線２０のみに限らず、その異常部位の検出用検知線２０単独として使用し得る。 Although the detection wire 20 of the above embodiment is formed by twisting the insulated wires 21, it may be simply a parallel one. At that time, as shown in FIG. 4 (a), the conductors 21 a and 21 a are kept parallel. The insulating coating 21b can be applied. Moreover, the insulating coating 21b can also be configured by a braid 21c, as shown in FIG. In the case of an insulating coating that is not dissolved by gastric juice or the like, such as the braid 21c, the gastric fluid infiltrates into the insulating coating, and the electrical resistance between the conductors 21a is reduced due to the conductivity (ionization) of the gastric fluid. Will be detected. This conductive effect can be obtained even when the insulating coating 21b is not completely melted and the two conductors 21a and 21a are not in contact with each other.
In the case of bodily fluids such as gastric fluid, if the insulating coating 21b dissolves at a specific hydrogen ion concentration or the like of the bodily fluid, a specific hydrogen ion such as a tumor is formed and the hydrogen ion concentration of the gastric fluid is changed. An abnormal site such as the concentration in the stomach can be confirmed. This confirming action is not limited to the detection line 20 inserted into the medical tube P, and can be used as the detection line 20 for detecting the abnormal part alone.

以上の検知線２０の構成において、導体２１ａはその全周が絶縁被覆されている必要はなく、両導体２１ａ、２１ａ間が絶縁されておればよい。例えば、図４（ａ）において、両導体２１ａ間の絶縁被覆２１ｂのみで他の導体２１ａの外周面は両導体が接触しない限りにおいて露出していてもよい。チューブ本体１０の挿入時に両導体２１ａ、２１ａが短絡せず、センサ部２２が胃液に触れてそのセンサ部２２の導体２１ａ、２１ａ間の電気抵抗が変化すれば良いからである。この点から、センサ部２２の導体２１ａの先端面は、露出していても良いが、導体２１ａの全周面が絶縁被覆されている等の前記の何れの場合においても、絶縁被覆されていることが好ましい。   In the configuration of the detection line 20 described above, the conductor 21a does not need to be covered with insulation on the entire circumference, and it is sufficient that the conductors 21a and 21a are insulated. For example, in FIG. 4A, the outer peripheral surface of the other conductor 21a may be exposed only by the insulation coating 21b between the two conductors 21a as long as the two conductors do not contact each other. This is because both the conductors 21a and 21a are not short-circuited when the tube main body 10 is inserted, and it is sufficient that the electrical resistance between the conductors 21a and 21a of the sensor unit 22 changes when the sensor unit 22 touches the gastric juice. From this point, the end surface of the conductor 21a of the sensor unit 22 may be exposed, but in any of the above cases, the entire peripheral surface of the conductor 21a is covered with insulation. It is preferable.

さらに、検知線２０は、スタイレットを兼用せずに、スタイレットにさらに検知線２０を撚り合わせ等によって添えたり、図５に示すように、チューブ本体１０内に埋め込んだものとしたりし得る。この場合、絶縁被覆２１ｂが不要となり、側孔１５に露出するセンサ部２２となる対の導体２１ａ、２１ａの間のみを絶縁被覆すればよい。その絶縁被覆２１ｂが、胃液に溶けて両導体２１ａが短絡したり、両導体２１ａが近接したりして、両導体２１ａ間の電気抵抗が低下する。   Further, the detection line 20 may be used by adding the detection line 20 to the stylet by twisting or the like without using the stylet, or may be embedded in the tube body 10 as shown in FIG. In this case, the insulating coating 21b is not necessary, and only the gap between the pair of conductors 21a and 21a to be the sensor portion 22 exposed in the side hole 15 may be insulated. The insulating coating 21b dissolves in the gastric juice and the two conductors 21a are short-circuited or the two conductors 21a are close to each other, so that the electrical resistance between the two conductors 21a is reduced.

上記実施形態は、チューブ本体１０の先端部が胃内に至ったことを検出するものであったが、検出部２２の絶縁被覆２１ｂに胃酸に溶けず、アルカリ性の腸液によって溶ける材料を使用すれば、チューブ本体１０の先端部（センサ部２２）が小腸に至ったことを検出できる。
このように、今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。この発明の範囲は、特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 In the above-described embodiment, it is detected that the distal end portion of the tube body 10 has entered the stomach. However, if the insulating coating 21b of the detection unit 22 is made of a material that does not dissolve in stomach acid but dissolves in alkaline intestinal fluid. It is possible to detect that the distal end portion (sensor portion 22) of the tube main body 10 has reached the small intestine.
Thus, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

Ｐ 医療用チューブ（食道経由経腸栄養用チューブ）
１０ チューブ本体（カニューレ）
１１ スタイレット２０の挿入口
１２ 側注ポート
１３ａ、１３ｂ キャップ
１４ コネクタ
１５ 側孔
１６ 重り部
２０ スタイレット（検知線：対の絶縁電線）
２１ 絶縁電線
２１ａ 絶縁電線の導体
２１ｂ 同絶縁被覆
２１ｃ 絶縁被覆用編組
２２ センサ部 P Medical tube (tube for enteral feeding via the esophagus)
10 Tube body (cannula)
11 Insertion port of stylet 20 Side injection port 13a, 13b Cap 14 Connector 15 Side hole 16 Weight part 20 Stylet (detection line: pair of insulated wires)
21 Insulated wire 21a Insulated wire conductor 21b Insulating coating 21c Insulating coating braid 22 Sensor unit

Claims (2)

経鼻的に胃又は小腸に留置し経管的に栄養を腸内に補給するための医療用チューブ（Ｐ）であって、そのチューブ本体（１０）の基端から先端まで検知線（２０）が挿入され、その検知線（２０）は対の絶縁電線（２１、２１）からなってその対の絶縁電線（２１、２１）の先端によってセンサ部（２２）が形成され、そのセンサ部（２２）は、絶縁被覆（２１ｂ）が胃又は小腸の所要位置に挿入された時点における胃液又は腸液との接触により同対の導体（２１ａ、２１ａ）間の抵抗値を変化させるものであり、検知線（２０）の基端の両絶縁電線（２１、２１）間の前記抵抗値の変化による電圧変化によってチューブ本体（１０）の先端が前記所要位置に達したことを検出する医療用チューブ。   A medical tube (P) for indwelling in the stomach or small intestine nasally and replenishing nutrition into the intestine through a tube, and a detection line (20) from the proximal end to the distal end of the tube body (10) Is inserted, and the detection line (20) is composed of a pair of insulated wires (21, 21), and a sensor portion (22) is formed by the tip of the pair of insulated wires (21, 21). ) Changes the resistance between the pair of conductors (21a, 21a) by contact with the gastric juice or intestinal fluid when the insulating coating (21b) is inserted into the stomach or small intestine at a required position. The medical tube which detects that the front-end | tip of the tube main body (10) reached the said required position by the voltage change by the change of the said resistance value between the both insulated wires (21, 21) of the base end of (20). 上記対の絶縁電線（２１、２１）が撚られて、上記胃液又は腸液により、センサ部（２２）の絶縁被覆（２１ｂ）が溶解すると、その対の電線挿入端の導体（２１ａ、２１ａ）間が前記撚り力によって近づくことを特徴とする請求項１に記載の医療用チューブ。
When the pair of insulated wires (21, 21) are twisted and the insulating coating (21b) of the sensor section (22) is dissolved by the gastric juice or intestinal fluid, the conductors (21a, 21a) between the pair of wires are inserted. The medical tube according to claim 1, wherein the medical tube is approached by the twisting force.
JP2014210772A 2014-10-15 2014-10-15 Medical tube Pending JP2016077450A (en)

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WO2019215791A1 (en) 2018-05-07 2019-11-14 株式会社ニューロシューティカルズ Medical tube position confirmation system
WO2020059087A1 (en) 2018-09-20 2020-03-26 株式会社ニューロシューティカルズ Medical tube position confirmation system
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EP4218773A1 (en) 2016-02-15 2023-08-02 Kyoto Prefectural Public University Corporation Human functional corneal endothelial cell and application thereof
CN110325102A (en) * 2016-12-23 2019-10-11 伊克尼奥斯股份有限公司 Casing with the wire rod stretched along casing
JP2020512049A (en) * 2016-12-23 2020-04-23 ゼニオス アーゲー A cannula along which the wire extends
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EP4052692A1 (en) 2019-10-31 2022-09-07 Otsuka Pharmaceutical Factory, Inc. Medical tube position confirmation system
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KR20230035570A (en) 2020-06-04 2023-03-14 뉴로슈티컬즈 인크. light guide

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