Ankle & Foot Evidence: suggestive

Figure-Eight Measurement Special Test

Orthopedic Physical Examination & Clinical Assessment Guide

Figure-Eight Measurement Orthopedic Special Test

What is it used for?

  • Reliably quantifying ankle swelling (edema).

How to Perform

  • Position: Patient sits with the ankle in a neutral position.
  • Action: Wrap a tape measure around the ankle in a specific order:
    1. Start at the Tibialis Anterior tendon.
    2. Go to the distal 5th metatarsal base.
    3. Cross over the Navicular tuberosity.
    4. Pass below the lateral malleolus.
    5. Pass below the lateral medial malleolus and back to the start.

Interpretation of Results

  • Positive: A measurable difference (e.g., > 1-2 cm) compared to the uninjured side indicates significant swelling.

Diagnostic Accuracy

  • Reliability: High (ICC = 0.99).

References

  • Magee, D. J. (2021). Orthopedic Physical Assessment (7th ed.). Elsevier.