It is possible to deliver nutrients or medicines directly to the patient's stomach. The rear side of the tube 10 is connected with a connector 15 (connecting portion), and the connector 15 is connected with a cable C10. Cable C10 is connected to the control department 50 (external device). The tube 10 is provided with a power cord 25, one end of the power cord 25 is connected to the light-emitting portion 20, and the other end of the power cord 25 is connected to the connector 15. Connector 15 plays the role of conducting the power line 25 of the tube 10 and the cable C10. Further, the connector 15 is provided with an inlet port 151 communicating with the port on the other end of the tube 10 (the mouth on the outside side). Able to put nutrients or medicines, etc. into the tube 10 from the input port 151. The light-emitting portion 20 is provided with an infrared light-emitting element 21 for confirming the position of the tube 10. The wavelength of infrared light emitted from the infrared light-emitting element 21 is about 650nm ~ 1000nm that can pass through the human body 100. Thus, when the tube 10 enters the body, infrared light emitted from the light-emitting portion 20 disposed on the anterior side of the tube 10 can be received outside the body. The infrared light-emitting element 21 is connected to the power cord 25. The power cord 25, for example, is embedded in the wall (within the thickness) of the pipe 10, and extends from the front end of the pipe 10 to the rear end. In addition, the light-emitting part 20 is protected by the cover 20c. The lid 20c can prevent water from entering the light-emitting portion 20, and the smooth shape of the cover 20c can improve the operability when inserting the tube 10 into the human body 100. The light-receiving portion 30 is a portion that receives infrared light emitted from the light-emitting portion 20 and transmits through the human body 100. The light-receiving portion 30 is arranged outside the body and close to the position of the human body 100. For example, in the case of wanting the tip of the tube 10 to reach the stomach. While China's society has changed from a subsistence type to a moderately well-off type, China has entered an old-age society. What is a guidewire
