A nurse is performing a respiratory physical examination on a healthy patient. When performing the percussion physical assessment technique, the lung percussion note should be:

The correct answer is A: Resonance. During lung percussion on a healthy patient, the expected percussion note should be resonance, indicating normal air-filled lung tissue. Resonance is a low-pitched, hollow sound heard over healthy lung areas. Tympanic and flat notes are abnormal and indicate pathology such as pneumothorax or consolidation. Dullness is heard over areas with increased density like a tumor or pneumonia. Therefore, resonance is the correct choice for a healthy lung assessment.