Study Notes on Percussion in Medical Examination

Percussion in Medical Examination

Definition of Percussion

  • Percussion is a clinical technique used to determine the prominent sound produced by a body part, particularly organs.
  • Purpose: To assess the density of organs and identify whether they are solid or hollow.

Assessment of Organ Density

  • Questions to consider when assessing organs through percussion:
    • What is the density of the organ?
    • Is it a solid organ?
    • Is it a hollow organ?

Specific Organ Characteristics

  • Example Organ:
    • Lungs: Considered (or should be) hollow due to the air they contain during respiration.

Procedure for Percussion

  • Starting point: Begin above the clavicle and move downwards, comparing sounds from side to side.
  • Pattern:
    • Perform percussion in a systematic manner:
    • Use a pattern of three percussion points down each side and across the midline ("three three spots, then down, cross, down, cross").

Types of Sounds Detected

  • Resonant Sounds:
    • Description: The predominant percussion sounds heard in adult lungs.
    • Importance: Indicates healthy lung function.
  • Hyper-resonant Sounds:
    • Description: A higher pitch associated with a booming, lower sound quality.
    • Clinical significance: Can indicate pathological conditions such as pneumothorax.

Considerations During Percussion

  • Avoiding Areas: According to the instruction, practitioners should avoid percussing over the scapula as it will not produce meaningful sounds.

Indirect Percussion Technique

  • Method:
    • The percussion is performed indirectly, which can enhance the clarity of sounds heard during auscultation (listening to body sounds with a stethoscope).
  • Follow-Up Action: After performing the percussion, the following sequence is to be followed:
    • Tap in the rhythm:
    • "One, two, three, the E and C. One, two, three."
    • Continue with the pattern on the posterior thorax as:
      • "One, two, three. One, two, three. One, one, two, two."

Importance of Continuous Communication

  • During the procedure, it is important to keep talking and explaining the process to enhance the understanding of the technique and its clinical implications.