Orthopedics Book

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Thessaly Test

Aka: Thessaly Test
  1. Indication
    1. Acute Knee Injury evaluation
  2. Preparation
    1. Examiner holds patient's outstretched hands
    2. Patient stands fully weight bearing on the affected leg
      1. Opposite leg is flexed at the knee to 90 degrees so it remains off the floor for the test
    3. Position the affected leg
      1. Foot of the affected leg is kept flat on the floor
      2. Knee of the affected leg is flexed to 20 degrees
  3. Maneuver
    1. Patient internally and externally rotates 3 times with the affected knee flexed at 20 degrees
    2. Images
      1. orthoKneeThesaly.jpg
  4. Interpretation
    1. Pain on maneuver suggests a meniscal tear
  5. Efficacy
    1. More accurate than the McMurray Test
    2. Probability of injury if positive: 81% (Positive Likelihood Ratio 39.3)
    3. Probability of injury if negative: 1% (Negative Likelihood Ratio 0.09)
  6. References
    1. Harrison (2009) J Sport Med 19(1):9-12 [PubMed]

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