PROBLEM TO BE SOLVED: To provide a method for reducing adherence of phlegm onto the inside surface of a tube for a trachea by enabling the phlegm in the tube for a trachea to be moved on the inside surface of a lumen for assuring a respiratory tract by a patients respiratory stream to moved the phlegm as small as not to move with a conventional technique configuration by the patients respiratory stream.SOLUTION: The method includes disposing a tube for a trachea so as to communicate between a patents outside and inside of body in a non-immersed state, the tube for a trachea having a tip end part 122 disposed on a lung side of the trachea 7 inside, a base end part 121 disposed on the other side of the tip end part 122, a lumen 102a for assuring a respiratory tract going to the tip end part 122 from the base end part 121 and provided with a hydrophilic film 150 disposed on at least a part of an inner surface forming the lumen 102a for assuring a respiratory tract. The method includes enabling phlegm Z in the tube for the trachea to be moved by a patients aspiratory stream on the inside surface of the tube for the trachea by forming an aqueous layer on a hydrophilic film 150 with a water content in a respiratory gas and/or in the phlegm.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】気管用チューブ内の喀痰が、患者の呼吸の流れによって気道確保用ルーメンの内面を移動できるようにして、従来技術の構成では移動しない程度の小さな喀痰を患者の呼吸の流れによって移動させて気管用チューブ内面への喀痰の固着を低減する方法の提供。【解決手段】気管7内の肺側に配置される先端部122、先端部122と反対側に配置される基端部121、及び、基端部121から先端部122にかけて貫通する気道確保用ルーメン102aを有し、気道確保用ルーメン102aを形成する内面の少なくとも一部に親水性皮膜150を備える気管用チューブを、非浸漬状態で患者の体外と体内とを連通するように配置する方法。呼吸気中の水分及び/又は喀痰中の水分によって親水性皮膜150上に水層が形成されることで、気管用チューブ内の喀痰Zが、患者の呼吸の流れによって前記気管用チューブ内面を移動できる方法。【選択図】図2
