Hyperresonant sounds may also be heard when percussing lungs hyperinflated with air, such as may occur in patients with COPD, or patients having an acute asthmatic attack. An area of hyperresonance on one side of the chest may indicate a pneumothorax. Tympanic sounds are hollow, high, drumlike sounds.

What does Hyperresonance of lungs mean?

Medical Definition of hyperresonance : an exaggerated chest resonance heard in various abnormal pulmonary conditions.

Why does pneumothorax cause Hyperresonance?

There will be hyper-resonance on the side of pneumothorax due to the presence of air in pleural space. Loss of cardiac or hepatic dullness can be noted if there is sufficient air to overlay these structures. Breath Sounds are dramatically decreased secondary to decreased ventilation on the side of pneumothorax.