Fig 3.

Time series of pressure from AP at 4 locations in lumen, with identical parameters, for trachea open or closed. For open trachea (left), areas closest to trachea (A) remain under low pressure; pressure drops as stenosis passes (B). Pressure is equalized everywhere distal to location of maximal occlusion, whether trachea is open or closed. If trachea is open (left), fluid leakage dissipates pressure. A blocked trachea (right) ensures equal pressure throughout lumen, which has the effect of synchronizing cell stretch.