A patient with asthma and COPD would have what type of lung sound to percussion?

In a patient with asthma and chronic obstructive pulmonary disease (COPD), percussion of the lungs typically produces hyperresonant sounds. This is due to the increased air trapped in the lungs, which is a characteristic of these conditions. Asthma can lead to bronchoconstriction and airway inflammation, causing airflow obstruction and resulting in air retention. COPD, particularly in its emphysematous form, is associated with destruction of lung tissue and loss of elastic recoil, causing further air trapping.

The hyperresonance noted in percussion is indicative of overinflated lungs. Normal lung sound on percussion would be resonant, while a dull sound may occur in cases of fluid or solid masses within the pleural space or lung tissue, such as in pneumonia or tumors. Thus, the presence of hyperresonance aligns with the pathophysiology of asthma and COPD, making it the correct choice for this question.