Obstructive vs. Restrictive

1. RESTRICTIVE VS. OBSTRUCTIVE
LUNG DISEASES
Fatima AlAwadh

2. INTRODUCTION
LUNG VOLUMES AND CAPACITIES
2.5 L
0.5 L
1.5 L
1.5 L
Inspiratory Reserve Volume
Tidal Volume
Residual Volume
Expiratory Reserve Volume
Inspiratory Capacity
Functional Residual Capacity
Vital Capacity
Total Lung Capacity

3. 2.5 L
0.5 L
1.5 L
1.5 L
OBSTRUCTIVE
Normal Obstructive
Forced Vital Capacity N or
Forced Expiratory Volume in 1sec
Total Lung Capacity N or
Residual Volume
FEV1 /
FVC

4. RESTRICTIVE
Normal Restrictive
Forced Expiratory Volume in 1sec N or
FEV1 / FVC N
or
Residual Volume
Forced Vital Capacity
Total Lung Capacity

5. OBSTRUCTIVE VS. RESTRICTIVE
Obstructive disorders: Obstructive disorders are
characterized by a reduction in airflow, particularly
the FEV1 and the FEV1/FVC.
Restrictive disorders: Restrictive disorders are
characterized by a reduction in lung volume,
specifically a TLC < 80% of the predicted value.

6. “Thank You”