lectures on respiratory physiology mechanics of breathing i
TRANSCRIPT
Lectures on respiratory physiologyLectures on respiratory physiology
Mechanics of Breathing IMechanics of Breathing I
Perfect Lung
Action of the diaphragm
Perfect Lung
Action of the intercostal muscles
Perfect Lung
Action of the abdominal muscles
Perfect Lung
Action of the intercostal muscles
Perfect Lung
Pressure-volume curve of the lung
3000
2000
1000
FRC
0 -10 -20 -30
Intrapleural pressure (cmH2O)
Vo
lum
e a
bo
ve
FR
C (
ml)
COMPLIANCE = ΔV / ΔP
=1000/5
= 200 ml/cmH2OΔV
ΔP
Compliance of lung
Perfect Lung
Capillary showing collagen (Col)
Perfect Lung
Fibers of elastin
Perfect Lung
Some effects of surface tension
Perfect Lung
Comparison of air and saline inflation
Perfect Lung
Measurement of surface tension and its behavior
Perfect Lung
Comparison of air and saline inflation
Type II alveolar epithelial cell
Type II cell showing lamellar inclusion bodies (LIB)
Lung with absence of surfactant
Regional differences of ventilation at FRC
Regional differences of ventilation at RV
Alveoli are larger at the apex (upper panel) than base (lower)
Airway closure at the lung base
Pressure changes with bilateral pneumothorax
Pneumothorax of right lung
Fibrosis of right lung
Relaxation pressure-volume curves
Perfect Lung
Pressure-volume curve of the lung
Relaxation pressure-volume curves