A physiologically-based model of localized mucociliary clearance in the airways.

Summary: Imagine your lungs have a built-in cleaning system, like tiny brooms sweeping away dirt and germs. This is called mucociliary clearance. Sometimes, in diseases like cystic fibrosis, these brooms don't work well and mucus gets stuck. Scientists created a new math model to track exactly where the brooms are sweeping in the lungs using special cameras. They found that in cystic fibrosis, the lower parts of the lungs struggle the most to clean themselves. But when patients inhaled a salty water mist (hypertonic saline), the sweeping speed improved everywhere! This new tool will help doctors test better treatments to keep lungs clean and healthy.