Percussion

Definition

Percussion is a clinical technique used during physical assessments to evaluate the condition of underlying structures in the body by tapping on the surface. It helps in determining the size, density, and borders of organs like the liver and lungs.

5 Must Know Facts For Your Next Test

1. Percussion can distinguish between solid, fluid-filled, and gaseous areas in the digestive organs.
2. A resonant sound typically indicates normal lung tissue, while a dull sound might indicate consolidation or fluid.
3. In assessing digestive organs, tympany is often heard over areas filled with gas such as the intestines.
4. Dullness upon percussion could suggest an enlarged liver or spleen.
5. Proper technique involves using the middle finger of one hand to tap on the middle finger of the other hand placed on the patient's body.

Review Questions

• What type of sound would you expect to hear during percussion over a healthy lung?
• How does percussion help in differentiating between solid and hollow organs?
• Why might dullness be observed when percussing over a patient’s abdomen?

Related terms

Auscultation:

A method where healthcare providers listen to internal body sounds using a stethoscope.

Palpation:

A technique used to feel objects within the body to assess their size, shape, firmness, or location.

Inspection:

The visual examination of different parts of a patient's body for signs of disease or abnormalities.