What is percussion used to assess in a physical examination?

Percussion in a physical examination is primarily employed to assess the underlying structures of the lungs and other organs, particularly to determine the presence of air or fluid. By tapping on the body's surface, healthcare providers can produce sounds that indicate different conditions. For example, a dull sound may indicate the presence of fluid or solid tissue, while a resonant sound typically indicates air-filled spaces. This technique is especially useful in evaluating the lungs for abnormal fluid accumulation, such as pleural effusion, as well as to outline the cardiac border. This thorough assessment helps clinicians make more accurate diagnoses regarding respiratory and cardiac health.

Other options, while relevant to different assessment techniques, do not pertain to percussion. Evaluating muscle strength, joint flexibility, skin temperature, moisture levels, respiratory rate, and breathing depth involves other physical examination methods and tools, such as visual observation, palpation, or auscultation.