Tracheal cannula and use of a tracheal cannula

A tracheal cannula comprising:

• a cannula tube;
• and
• a cannula shield, wherein the cannula tube has a distal end portion, to which the cannula shield is assigned, and a tracheal end portion, which is able to be arranged in a trachea, wherein a first external diameter is assigned to the cannula tube at the cannula shield;
• a second external diameter is assigned to the cannula tube at a tracheal end,
• wherein the cannula tube includes a cannula lumen which is continuous from a distal end to the tracheal end and has a constant internal diameter, wherein a wall at least of the tracheal end portion includes a first wall thickness which is contiguous with the distal end portion, and a second wall thickness at the tracheal end, wherein the first wall thickness of the wall at the site of the first external diameter is greater than a second wall thickness of the wall at the site of the second external diameter, wherein the first wall thickness is greater than the second wall thickness, and the wall thickness of the tracheal end portion reduces continuously towards the tracheal end.