saber-sheath trachea

sa·ber-sheath tra·che·a

a type of tracheal collapse seen in chronic obstructive pulmonary disease in which an increase if found in the outer posterior tracheal dimension with side-to-side narrowing involving the lower two thirds of the trachea.

saber-sheath trachea

[sā′bər]

an abnormally shaped trachea caused by chronic obstructive pulmonary disease. The diameter of the posterior part of the trachea is increased while the lateral dimension is decreased.