URL of this page: //www.nlm.nih.gov/medlineplus/ency/article/002281.htm


Percussion is a method of tapping body parts with fingers, hands, or small instruments as part of a physical examination. It is done to determine:

  • The size, consistency, and borders of body organs
  • The presence or absence of fluid in body areas

Percussion of a body part produces a sound, like playing a drum. The sound is a sign of the type of tissue within the body part or organ.

  • Lungs sound hollow on percussion because they are filled with air.
  • Bones, joints, and solid organs such as the liver sound solid.
  • The abdomen sounds like a hollow organ filled with air, fluid, or solids.



Simel DL. Approach to the patient: history and physical examination. In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine. 24th ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 6.

Update Date 1/31/2015