PG Preparation
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Differences
between Emphysema and Chronic Bronchitis
| Feature |
Emphysema |
Chronic
bronchitis |
| Clinical
Features |
|
|
| Dyspnoea |
Severe |
Mild |
| Cough |
After dyspnoeastarts |
Before dyspnoeastarts |
| Sputum |
Scantly mucoid |
Copius, purulent |
| Mucopurulent
relapses |
Less frequent |
More frequent |
| Cyanosis |
Absent |
Present |
| Pulmonary
hypertension |
Late and
mild |
Early and
severe |
| Right ventricular
failure |
Late and
often terminal |
Repeated
episodes |
| Respiratory
failure |
Late and
often terminal |
Repeated
episodes |
| |
|
|
| Investigations |
|
|
| Haemotrocit |
Normal |
Increased |
| Pao2 |
Normal |
Low |
| PaCo2 |
Normal |
High |
| Diffusing
capacity |
Reduced |
Normal |
| Chest X -ray |
Features
of hyperinflation |
Increased
bronchovascular |
| |
bullae and
tubular heart |
markings
and cardiomegaly |
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