Wrist & Hand Tendon Injury Evidence: uncertain

Boyes Test Special Test

Orthopedic Physical Examination & Clinical Assessment Guide

Boyes Test Orthopedic Special Test

What is it used for?

  • Diagnosing Central Slip Injury (Boutonniere Deformity).

How to Perform

  • Position: Examiner holds the patient's finger in extension at the PIP joint.
  • Action: Ask the patient to flex the DIP joint.

Interpretation of Results

  • Positive Test: The patient cannot flex the DIP joint.
  • Why: If the central slip is intact, extending the PIP relaxes the lateral bands, allowing DIP flexion. If ruptured, the lateral bands tighten, preventing DIP flexion.

References

  • Magee, D. J. (2021). Orthopedic Physical Assessment.