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 1COPYRIGHT: (C)2016,JPO&INPIT【課題】簡単な構造で体内に挿入された医療用チューブPの先端位置を検出し得るようにする。【解決手段】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である。対の絶縁電線21からなる検知線20がチューブ本体10の先端まで挿入されてその挿入端がセンサ部22となっている。チューブ先端の検出部が胃又は小腸の所要位置に達すると、その検出部の絶縁被覆21bが胃液又は腸液により溶けて同導体21aが短絡する。この短絡を、検知線基端に設けた電圧器の電圧変化によって検出し、検出部(チューブ本体先端)が胃又は小腸の所要位置に達したことを知る。このとき、対の絶縁電線が撚られていると、検出部の絶縁被覆が胃液等により溶解すると、その対の導体21a間が前記撚り力によってさらに近づいて短絡する。このため、前記検出部の位置検知が確実となる。【選択図】図1
