Lectures on respiratory physiology

1
Mechanics of Breathing II

• Lectures on respiratory physiology

2
Patterns of gas flow in tubes
3
Poiseuille equation for laminar flow
4
Patterns of gas flow in tubes
5
The Reynolds number
6
Pressures during the breathing cycle
7
Number of airways increases rapidly with
generation
8
Most resistance is in the medium sized airways
9
Airway resistance falls with increasing lung
volume
10
Flow volume curves
11
Isovolume pressure-flow curves
12
Mechanism of dynamic compression
13
Flow volume curves
14
Flow through collapsible tubes
15
Mechanism of dynamic compression
16
Work done on the lung during breathing