Abstract
Hydropneumothorax is defined as the presence of both air and fluid within the pleural space. An upright chest x-ray will show air fluid levels. The horizontal fluid level is usually well defined and extends across the whole length of hemithorax.
Signs
This can be remembered by 4 'S'
- Straight line dullness
- Shifting dullness
- splash
- Sound of coin
- fullness of chest