Case Studies in the Human Respiratory System - Computational Fluid and Particle Dynamics in the Human Respiratory System - page 308

affected by the asthma (G4LU and G4RU). Besides these affected branches, G3LL
and G3RU also had a dilation greater than 10 % (Fig. 8.59 ). Overall the right airway
exhibited greater dilation in comparison with the left airway especially from the
fifth generation onwards. The effects of a greater dilation on particle deposition are
uncertain, and this is discussed later in the results. Sections, G3LU, and G6R showed
minor negative increases ( 0.4 % respectively) which means that these

sections were actually contracted. It is uncertain if this is within the margin of the
modelling error or whether it reflects a real physiological feature, such as the after
effects of airway narrowing by inflammation and edema of the lining airway mucosa,
or even the accumulation of mucus and other fluids, which can plug the airways.

− 0.2 and −

Fig. 8.59 Percentage increase in the averaged diameter from the acute asthma model to the recovered
model in the a Left lung airway b Right lung airway