PROBLEM TO BE SOLVED: To provide a tracheal tube with which the likelihood of inflammation occurring in a tracheal inner wall is reduced.SOLUTION: The tracheal tube according to the present invention comprises: a tube body and a cuff which is mounted to the tube body, and of which barrel is contractible and expandable. The tracheal tube, when expanded, includes a tapered part which is rotationally symmetric about a center axis line of the tube body, and of which diameter increases from one side to the other along the center axis line. A covering region in which the tapered part covers a tracheal inner wall of a trachea when the barrel is expanded inside the trachea, includes: a circumferential wrinkle in continuously noncontact with the tracheal inner wall along a circumferential direction of the barrel and a sealed part in continuously contact with the tracheal inner wall along the circumferential direction of the barrel. The sealed part is formed of a proximal side sealed portion located in a proximal side of the tube body across the circumferential wrinkle and a distal side sealed portion located in a distal side of the tube body across the circumferential wrinkle.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2017,JPO&INPIT【課題】気管内壁に炎症を起こしにくくすることが可能な気管チューブを提供する。【解決手段】本発明の気管チューブは、チューブ本体と、前記チューブ本体に装着され、胴部が収縮及び拡張可能なカフと、を備え、前記胴部が、拡張した状態において、前記チューブ本体の中心軸線について回転対称であり、前記中心軸線に沿う一方から他方に向かって径が広がったテーパ部を有し、前記胴部が気管内で拡張した状態において前記テーパ部が前記気管の気管内壁を被覆する被覆領域が、前記胴部の周方向に亘って連続して前記気管内壁と非接触である周回しわと、前記胴部の周方向に亘って切れ目なく前記気管内壁と接触する密閉部と、を有し、前記密閉部が、前記周回しわを挟んで前記チューブ本体の基端側に位置する基端側密閉部と、前記周回しわを挟んで前記チューブ本体の先端側に位置する先端側密閉部とにより構成されることを特徴とするものである。【選択図】図4
