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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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