Endotracheal tube was determined size and shape for placement in the trachea distal segment to be positioned in the tracheal lumen of a patient, at least in the endotracheal tube (101) said endotracheal tube (101) and endotracheal apparatus including a (102) self-expanding one element A (100), said at least has a thickness a second expanded state and the first thickness of the compressed state and are positioned around the peripheral surface of the switched to the expanded state from the compressed state self-expanding one element (102), and to absorb the moisture, said thickness first thinner than the thickness of the second. [Selection] Figure Figure 1D気管内チューブの少なくとも遠位セグメントが患者の気管内腔に位置されるように気管内に配置されるために寸法及び形状を決定された気管内チューブ(101);及び前記気管内チューブ(101)の周囲表面のまわりに配置され、かつ圧縮状態の第一厚さ及び拡張状態の第二厚さを有する少なくとも一つの自己拡張要素(102)を含む気管内装置(100)であって、前記少なくとも一つの自己拡張要素(102)は、湿分を吸収すると前記圧縮状態から前記拡張状態に切り換わり、前記第一厚さは前記第二厚さより薄い。【選択図】図1D
