Respiratory Deposition

:: Section 4

Deposition Mechanism

I. Impaction

Collection by impaction is due to a particle's inertia that makes the particle deviate from the air stream when the air stream makes a turn. That is, the particle likes to stick to its original linear path and does not want to follow the curved air streamlines. Impaction is important when the particle size or the velocity is large in a curved pathway. Hence, it is the primary concern in the bronchial region.